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mutter/cogl/cogl-blit.c

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cogl-atlas: Try 4 different approaches for migrating textures Instead of directly banging GL to migrate textures the atlas now uses the CoglFramebuffer API. It will use one of four approaches; it can set up two FBOs and use _cogl_blit_framebuffer to copy between them; it can use a single target fbo and then render the source texture to the FBO using a Cogl draw call; it can use a single FBO and call glCopyTexSubImage2D; or it can fallback to reading all of the texture data back to system memory and uploading it again with a sub texture update. Previously GL calls were used directly because Cogl wasn't able to create a framebuffer without a stencil and depth buffer. However there is now an internal version of cogl_offscreen_new_to_texture which takes a set of flags to disable the two buffers. The code for blitting has now been moved into a separate file called cogl-blit.c because it has become quite long and it may be useful outside of the atlas at some point. The 4 different methods have a fixed order of preference which is: * Texture render between two FBOs * glBlitFramebuffer * glCopyTexSubImage2D * glGetTexImage + glTexSubImage2D Once a method is succesfully used it is tried first for all subsequent blits. The default default can be overridden by setting the environment variable COGL_ATLAS_DEFAULT_BLIT_MODE to one of the following values: * texture-render * framebuffer * copy-tex-sub-image * get-tex-data
2011-01-20 17:45:47 +00:00
/*
* Cogl
*
* An object oriented GL/GLES Abstraction/Utility Layer
*
* Copyright (C) 2011 Intel Corporation.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*
* Authors:
* Neil Roberts <neil@linux.intel.com>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
Start to reduce dependence on glib Since we've had several developers from admirable projects say they would like to use Cogl but would really prefer not to pull in gobject,gmodule and glib as extra dependencies we are investigating if we can get to the point where glib is only an optional dependency. Actually we feel like we only make minimal use of glib anyway, so it may well be quite straightforward to achieve this. This adds a --disable-glib configure option that can be used to disable features that depend on glib. Actually --disable-glib doesn't strictly disable glib at this point because it's more helpful if cogl continues to build as we make incremental progress towards this. The first use of glib that this patch tackles is the use of g_return_val_if_fail and g_return_if_fail which have been replaced with equivalent _COGL_RETURN_VAL_IF_FAIL and _COGL_RETURN_IF_FAIL macros. Reviewed-by: Neil Roberts <neil@linux.intel.com>
2011-10-13 21:34:30 +00:00
#include "cogl-util.h"
cogl-atlas: Try 4 different approaches for migrating textures Instead of directly banging GL to migrate textures the atlas now uses the CoglFramebuffer API. It will use one of four approaches; it can set up two FBOs and use _cogl_blit_framebuffer to copy between them; it can use a single target fbo and then render the source texture to the FBO using a Cogl draw call; it can use a single FBO and call glCopyTexSubImage2D; or it can fallback to reading all of the texture data back to system memory and uploading it again with a sub texture update. Previously GL calls were used directly because Cogl wasn't able to create a framebuffer without a stencil and depth buffer. However there is now an internal version of cogl_offscreen_new_to_texture which takes a set of flags to disable the two buffers. The code for blitting has now been moved into a separate file called cogl-blit.c because it has become quite long and it may be useful outside of the atlas at some point. The 4 different methods have a fixed order of preference which is: * Texture render between two FBOs * glBlitFramebuffer * glCopyTexSubImage2D * glGetTexImage + glTexSubImage2D Once a method is succesfully used it is tried first for all subsequent blits. The default default can be overridden by setting the environment variable COGL_ATLAS_DEFAULT_BLIT_MODE to one of the following values: * texture-render * framebuffer * copy-tex-sub-image * get-tex-data
2011-01-20 17:45:47 +00:00
#include "cogl-blit.h"
cogl: rename cogl-context.h cogl-context-private.h Since we plan to add public cogl_context_* API we need to rename the current cogl-context.h which contains private member details.
2010-11-04 22:25:52 +00:00
#include "cogl-context-private.h"
cogl-atlas: Try 4 different approaches for migrating textures Instead of directly banging GL to migrate textures the atlas now uses the CoglFramebuffer API. It will use one of four approaches; it can set up two FBOs and use _cogl_blit_framebuffer to copy between them; it can use a single target fbo and then render the source texture to the FBO using a Cogl draw call; it can use a single FBO and call glCopyTexSubImage2D; or it can fallback to reading all of the texture data back to system memory and uploading it again with a sub texture update. Previously GL calls were used directly because Cogl wasn't able to create a framebuffer without a stencil and depth buffer. However there is now an internal version of cogl_offscreen_new_to_texture which takes a set of flags to disable the two buffers. The code for blitting has now been moved into a separate file called cogl-blit.c because it has become quite long and it may be useful outside of the atlas at some point. The 4 different methods have a fixed order of preference which is: * Texture render between two FBOs * glBlitFramebuffer * glCopyTexSubImage2D * glGetTexImage + glTexSubImage2D Once a method is succesfully used it is tried first for all subsequent blits. The default default can be overridden by setting the environment variable COGL_ATLAS_DEFAULT_BLIT_MODE to one of the following values: * texture-render * framebuffer * copy-tex-sub-image * get-tex-data
2011-01-20 17:45:47 +00:00
#include "cogl-framebuffer-private.h"
#include "cogl-texture-2d-private.h"
Add internal _cogl_push_source to optionally disable legacy state Some code in Cogl such as when flushing a stencil clip assumes that it can push a temporary simple pipeline to reset to a known state for internal drawing operations. However this breaks down if the application has set any legacy state because that is set globally so it will also get applied to the internal pipeline. _cogl_draw_attributes already had an internal flag to disable applying the legacy state but I think this is quite awkward to use because not all places that push a pipeline draw the attribute buffers directly so it is difficult to pass the flag down through the layers. Conceptually the legacy state is meant to be like a layer on top of the purely pipeline-based state API so I think ideally we should have an internal function to push the source without the applying the legacy state. The legacy state can't be applied as the pipeline is pushed because the global state can be modified even after it is pushed. This patch adds a _cogl_push_source() function which takes an extra boolean flag to mark whether to enable the legacy state. The value of this flag is stored alongside the pipeline in the pipeline stack. Another new internal function called _cogl_get_enable_legacy_state queries whether the top entry in the pipeline stack has legacy state enabled. cogl-primitives and the vertex array drawing code now use this to determine whether to apply the legacy state when drawing. The COGL_DRAW_SKIP_LEGACY_STATE flag is now removed. Reviewed-by: Robert Bragg <robert@linux.intel.com>
2011-09-14 11:17:09 +00:00
#include "cogl-private.h"
Move all types/prototypes from cogl.h -> cogl[1]-context.h So we can get to the point where cogl.h is merely an aggregation of header includes for the 1.x api this moves all the function prototypes and type definitions into a cogl-context.h and a new cogl1-context.h. Ideally no code internally should ever need to include cogl.h as it just represents the public facing header for accessing the 1.x api which should only be used by Clutter. Reviewed-by: Neil Roberts <neil@linux.intel.com>
2012-02-17 21:46:39 +00:00
#include "cogl1-context.h"
cogl-atlas: Try 4 different approaches for migrating textures Instead of directly banging GL to migrate textures the atlas now uses the CoglFramebuffer API. It will use one of four approaches; it can set up two FBOs and use _cogl_blit_framebuffer to copy between them; it can use a single target fbo and then render the source texture to the FBO using a Cogl draw call; it can use a single FBO and call glCopyTexSubImage2D; or it can fallback to reading all of the texture data back to system memory and uploading it again with a sub texture update. Previously GL calls were used directly because Cogl wasn't able to create a framebuffer without a stencil and depth buffer. However there is now an internal version of cogl_offscreen_new_to_texture which takes a set of flags to disable the two buffers. The code for blitting has now been moved into a separate file called cogl-blit.c because it has become quite long and it may be useful outside of the atlas at some point. The 4 different methods have a fixed order of preference which is: * Texture render between two FBOs * glBlitFramebuffer * glCopyTexSubImage2D * glGetTexImage + glTexSubImage2D Once a method is succesfully used it is tried first for all subsequent blits. The default default can be overridden by setting the environment variable COGL_ATLAS_DEFAULT_BLIT_MODE to one of the following values: * texture-render * framebuffer * copy-tex-sub-image * get-tex-data
2011-01-20 17:45:47 +00:00
static const CoglBlitMode *_cogl_blit_default_mode = NULL;
Switch use of primitive glib types to c99 equivalents The coding style has for a long time said to avoid using redundant glib data types such as gint or gchar etc because we feel that they make the code look unnecessarily foreign to developers coming from outside of the Gnome developer community. Note: When we tried to find the historical rationale for the types we just found that they were apparently only added for consistent syntax highlighting which didn't seem that compelling. Up until now we have been continuing to use some of the platform specific type such as gint{8,16,32,64} and gsize but this patch switches us over to using the standard c99 equivalents instead so we can further ensure that our code looks familiar to the widest range of C developers who might potentially contribute to Cogl. So instead of using the gint{8,16,32,64} and guint{8,16,32,64} types this switches all Cogl code to instead use the int{8,16,32,64}_t and uint{8,16,32,64}_t c99 types instead. Instead of gsize we now use size_t For now we are not going to use the c99 _Bool type and instead we have introduced a new CoglBool type to use instead of gboolean. Reviewed-by: Neil Roberts <neil@linux.intel.com> (cherry picked from commit 5967dad2400d32ca6319cef6cb572e81bf2c15f0)
2012-04-16 20:56:40 +00:00
static CoglBool
cogl-atlas: Try 4 different approaches for migrating textures Instead of directly banging GL to migrate textures the atlas now uses the CoglFramebuffer API. It will use one of four approaches; it can set up two FBOs and use _cogl_blit_framebuffer to copy between them; it can use a single target fbo and then render the source texture to the FBO using a Cogl draw call; it can use a single FBO and call glCopyTexSubImage2D; or it can fallback to reading all of the texture data back to system memory and uploading it again with a sub texture update. Previously GL calls were used directly because Cogl wasn't able to create a framebuffer without a stencil and depth buffer. However there is now an internal version of cogl_offscreen_new_to_texture which takes a set of flags to disable the two buffers. The code for blitting has now been moved into a separate file called cogl-blit.c because it has become quite long and it may be useful outside of the atlas at some point. The 4 different methods have a fixed order of preference which is: * Texture render between two FBOs * glBlitFramebuffer * glCopyTexSubImage2D * glGetTexImage + glTexSubImage2D Once a method is succesfully used it is tried first for all subsequent blits. The default default can be overridden by setting the environment variable COGL_ATLAS_DEFAULT_BLIT_MODE to one of the following values: * texture-render * framebuffer * copy-tex-sub-image * get-tex-data
2011-01-20 17:45:47 +00:00
_cogl_blit_texture_render_begin (CoglBlitData *data)
{
Removes all remaining use of CoglHandle Removing CoglHandle has been an on going goal for quite a long time now and finally this patch removes the last remaining uses of the CoglHandle type and the cogl_handle_ apis. Since the big remaining users of CoglHandle were the cogl_program_ and cogl_shader_ apis which have replaced with the CoglSnippets api this patch removes both of these apis. Reviewed-by: Neil Roberts <neil@linux.intel.com> (cherry picked from commit 6ed3aaf4be21d605a1ed3176b3ea825933f85cf0) Since the original patch was done after removing deprecated API this back ported patch doesn't affect deprecated API and so actually this cherry-pick doesn't remove all remaining use of CoglHandle as it did for the master branch of Cogl.
2012-04-16 13:14:10 +00:00
CoglOffscreen *offscreen;
CoglFramebuffer *fb;
cogl-atlas: Try 4 different approaches for migrating textures Instead of directly banging GL to migrate textures the atlas now uses the CoglFramebuffer API. It will use one of four approaches; it can set up two FBOs and use _cogl_blit_framebuffer to copy between them; it can use a single target fbo and then render the source texture to the FBO using a Cogl draw call; it can use a single FBO and call glCopyTexSubImage2D; or it can fallback to reading all of the texture data back to system memory and uploading it again with a sub texture update. Previously GL calls were used directly because Cogl wasn't able to create a framebuffer without a stencil and depth buffer. However there is now an internal version of cogl_offscreen_new_to_texture which takes a set of flags to disable the two buffers. The code for blitting has now been moved into a separate file called cogl-blit.c because it has become quite long and it may be useful outside of the atlas at some point. The 4 different methods have a fixed order of preference which is: * Texture render between two FBOs * glBlitFramebuffer * glCopyTexSubImage2D * glGetTexImage + glTexSubImage2D Once a method is succesfully used it is tried first for all subsequent blits. The default default can be overridden by setting the environment variable COGL_ATLAS_DEFAULT_BLIT_MODE to one of the following values: * texture-render * framebuffer * copy-tex-sub-image * get-tex-data
2011-01-20 17:45:47 +00:00
CoglPipeline *pipeline;
unsigned int dst_width, dst_height;
_COGL_GET_CONTEXT (ctx, FALSE);
Removes all remaining use of CoglHandle Removing CoglHandle has been an on going goal for quite a long time now and finally this patch removes the last remaining uses of the CoglHandle type and the cogl_handle_ apis. Since the big remaining users of CoglHandle were the cogl_program_ and cogl_shader_ apis which have replaced with the CoglSnippets api this patch removes both of these apis. Reviewed-by: Neil Roberts <neil@linux.intel.com> (cherry picked from commit 6ed3aaf4be21d605a1ed3176b3ea825933f85cf0) Since the original patch was done after removing deprecated API this back ported patch doesn't affect deprecated API and so actually this cherry-pick doesn't remove all remaining use of CoglHandle as it did for the master branch of Cogl.
2012-04-16 13:14:10 +00:00
offscreen = _cogl_offscreen_new_to_texture_full
cogl-atlas: Try 4 different approaches for migrating textures Instead of directly banging GL to migrate textures the atlas now uses the CoglFramebuffer API. It will use one of four approaches; it can set up two FBOs and use _cogl_blit_framebuffer to copy between them; it can use a single target fbo and then render the source texture to the FBO using a Cogl draw call; it can use a single FBO and call glCopyTexSubImage2D; or it can fallback to reading all of the texture data back to system memory and uploading it again with a sub texture update. Previously GL calls were used directly because Cogl wasn't able to create a framebuffer without a stencil and depth buffer. However there is now an internal version of cogl_offscreen_new_to_texture which takes a set of flags to disable the two buffers. The code for blitting has now been moved into a separate file called cogl-blit.c because it has become quite long and it may be useful outside of the atlas at some point. The 4 different methods have a fixed order of preference which is: * Texture render between two FBOs * glBlitFramebuffer * glCopyTexSubImage2D * glGetTexImage + glTexSubImage2D Once a method is succesfully used it is tried first for all subsequent blits. The default default can be overridden by setting the environment variable COGL_ATLAS_DEFAULT_BLIT_MODE to one of the following values: * texture-render * framebuffer * copy-tex-sub-image * get-tex-data
2011-01-20 17:45:47 +00:00
(data->dst_tex, COGL_OFFSCREEN_DISABLE_DEPTH_AND_STENCIL, 0 /* level */);
Removes all remaining use of CoglHandle Removing CoglHandle has been an on going goal for quite a long time now and finally this patch removes the last remaining uses of the CoglHandle type and the cogl_handle_ apis. Since the big remaining users of CoglHandle were the cogl_program_ and cogl_shader_ apis which have replaced with the CoglSnippets api this patch removes both of these apis. Reviewed-by: Neil Roberts <neil@linux.intel.com> (cherry picked from commit 6ed3aaf4be21d605a1ed3176b3ea825933f85cf0) Since the original patch was done after removing deprecated API this back ported patch doesn't affect deprecated API and so actually this cherry-pick doesn't remove all remaining use of CoglHandle as it did for the master branch of Cogl.
2012-04-16 13:14:10 +00:00
if (offscreen == NULL)
cogl-atlas: Try 4 different approaches for migrating textures Instead of directly banging GL to migrate textures the atlas now uses the CoglFramebuffer API. It will use one of four approaches; it can set up two FBOs and use _cogl_blit_framebuffer to copy between them; it can use a single target fbo and then render the source texture to the FBO using a Cogl draw call; it can use a single FBO and call glCopyTexSubImage2D; or it can fallback to reading all of the texture data back to system memory and uploading it again with a sub texture update. Previously GL calls were used directly because Cogl wasn't able to create a framebuffer without a stencil and depth buffer. However there is now an internal version of cogl_offscreen_new_to_texture which takes a set of flags to disable the two buffers. The code for blitting has now been moved into a separate file called cogl-blit.c because it has become quite long and it may be useful outside of the atlas at some point. The 4 different methods have a fixed order of preference which is: * Texture render between two FBOs * glBlitFramebuffer * glCopyTexSubImage2D * glGetTexImage + glTexSubImage2D Once a method is succesfully used it is tried first for all subsequent blits. The default default can be overridden by setting the environment variable COGL_ATLAS_DEFAULT_BLIT_MODE to one of the following values: * texture-render * framebuffer * copy-tex-sub-image * get-tex-data
2011-01-20 17:45:47 +00:00
return FALSE;
Removes all remaining use of CoglHandle Removing CoglHandle has been an on going goal for quite a long time now and finally this patch removes the last remaining uses of the CoglHandle type and the cogl_handle_ apis. Since the big remaining users of CoglHandle were the cogl_program_ and cogl_shader_ apis which have replaced with the CoglSnippets api this patch removes both of these apis. Reviewed-by: Neil Roberts <neil@linux.intel.com> (cherry picked from commit 6ed3aaf4be21d605a1ed3176b3ea825933f85cf0) Since the original patch was done after removing deprecated API this back ported patch doesn't affect deprecated API and so actually this cherry-pick doesn't remove all remaining use of CoglHandle as it did for the master branch of Cogl.
2012-04-16 13:14:10 +00:00
fb = COGL_FRAMEBUFFER (offscreen);
if (!cogl_framebuffer_allocate (fb, NULL))
When internally using an FBO, check for allocation errors Both the cogl_texture_get_data and _cogl_blit_begin implementations will internally try to create an FBO for a texture and have fallbacks if the FBO fails. However neither of them were catching errors when allocating the framebuffer so the fallback wouldn't work properly. This patch just adds an explicit call to cogl_framebuffer_allocate for these uses and causes it to use the next fallback if it fails. Based on a patch by Adel Gadllah. https://bugzilla.gnome.org/show_bug.cgi?id=669368 Reviewed-by: Robert Bragg <robert@linux.intel.com>
2012-02-06 12:23:39 +00:00
{
Removes all remaining use of CoglHandle Removing CoglHandle has been an on going goal for quite a long time now and finally this patch removes the last remaining uses of the CoglHandle type and the cogl_handle_ apis. Since the big remaining users of CoglHandle were the cogl_program_ and cogl_shader_ apis which have replaced with the CoglSnippets api this patch removes both of these apis. Reviewed-by: Neil Roberts <neil@linux.intel.com> (cherry picked from commit 6ed3aaf4be21d605a1ed3176b3ea825933f85cf0) Since the original patch was done after removing deprecated API this back ported patch doesn't affect deprecated API and so actually this cherry-pick doesn't remove all remaining use of CoglHandle as it did for the master branch of Cogl.
2012-04-16 13:14:10 +00:00
cogl_object_unref (fb);
When internally using an FBO, check for allocation errors Both the cogl_texture_get_data and _cogl_blit_begin implementations will internally try to create an FBO for a texture and have fallbacks if the FBO fails. However neither of them were catching errors when allocating the framebuffer so the fallback wouldn't work properly. This patch just adds an explicit call to cogl_framebuffer_allocate for these uses and causes it to use the next fallback if it fails. Based on a patch by Adel Gadllah. https://bugzilla.gnome.org/show_bug.cgi?id=669368 Reviewed-by: Robert Bragg <robert@linux.intel.com>
2012-02-06 12:23:39 +00:00
return FALSE;
}
Removes all remaining use of CoglHandle Removing CoglHandle has been an on going goal for quite a long time now and finally this patch removes the last remaining uses of the CoglHandle type and the cogl_handle_ apis. Since the big remaining users of CoglHandle were the cogl_program_ and cogl_shader_ apis which have replaced with the CoglSnippets api this patch removes both of these apis. Reviewed-by: Neil Roberts <neil@linux.intel.com> (cherry picked from commit 6ed3aaf4be21d605a1ed3176b3ea825933f85cf0) Since the original patch was done after removing deprecated API this back ported patch doesn't affect deprecated API and so actually this cherry-pick doesn't remove all remaining use of CoglHandle as it did for the master branch of Cogl.
2012-04-16 13:14:10 +00:00
cogl_push_framebuffer (fb);
cogl_object_unref (fb);
cogl-atlas: Try 4 different approaches for migrating textures Instead of directly banging GL to migrate textures the atlas now uses the CoglFramebuffer API. It will use one of four approaches; it can set up two FBOs and use _cogl_blit_framebuffer to copy between them; it can use a single target fbo and then render the source texture to the FBO using a Cogl draw call; it can use a single FBO and call glCopyTexSubImage2D; or it can fallback to reading all of the texture data back to system memory and uploading it again with a sub texture update. Previously GL calls were used directly because Cogl wasn't able to create a framebuffer without a stencil and depth buffer. However there is now an internal version of cogl_offscreen_new_to_texture which takes a set of flags to disable the two buffers. The code for blitting has now been moved into a separate file called cogl-blit.c because it has become quite long and it may be useful outside of the atlas at some point. The 4 different methods have a fixed order of preference which is: * Texture render between two FBOs * glBlitFramebuffer * glCopyTexSubImage2D * glGetTexImage + glTexSubImage2D Once a method is succesfully used it is tried first for all subsequent blits. The default default can be overridden by setting the environment variable COGL_ATLAS_DEFAULT_BLIT_MODE to one of the following values: * texture-render * framebuffer * copy-tex-sub-image * get-tex-data
2011-01-20 17:45:47 +00:00
dst_width = cogl_texture_get_width (data->dst_tex);
dst_height = cogl_texture_get_height (data->dst_tex);
/* Set up an orthographic projection so we can use pixel
coordinates to render to the texture */
Removes all remaining use of CoglHandle Removing CoglHandle has been an on going goal for quite a long time now and finally this patch removes the last remaining uses of the CoglHandle type and the cogl_handle_ apis. Since the big remaining users of CoglHandle were the cogl_program_ and cogl_shader_ apis which have replaced with the CoglSnippets api this patch removes both of these apis. Reviewed-by: Neil Roberts <neil@linux.intel.com> (cherry picked from commit 6ed3aaf4be21d605a1ed3176b3ea825933f85cf0) Since the original patch was done after removing deprecated API this back ported patch doesn't affect deprecated API and so actually this cherry-pick doesn't remove all remaining use of CoglHandle as it did for the master branch of Cogl.
2012-04-16 13:14:10 +00:00
cogl_framebuffer_orthographic (fb,
0, 0, dst_width, dst_height,
-1 /* near */, 1 /* far */);
cogl-atlas: Try 4 different approaches for migrating textures Instead of directly banging GL to migrate textures the atlas now uses the CoglFramebuffer API. It will use one of four approaches; it can set up two FBOs and use _cogl_blit_framebuffer to copy between them; it can use a single target fbo and then render the source texture to the FBO using a Cogl draw call; it can use a single FBO and call glCopyTexSubImage2D; or it can fallback to reading all of the texture data back to system memory and uploading it again with a sub texture update. Previously GL calls were used directly because Cogl wasn't able to create a framebuffer without a stencil and depth buffer. However there is now an internal version of cogl_offscreen_new_to_texture which takes a set of flags to disable the two buffers. The code for blitting has now been moved into a separate file called cogl-blit.c because it has become quite long and it may be useful outside of the atlas at some point. The 4 different methods have a fixed order of preference which is: * Texture render between two FBOs * glBlitFramebuffer * glCopyTexSubImage2D * glGetTexImage + glTexSubImage2D Once a method is succesfully used it is tried first for all subsequent blits. The default default can be overridden by setting the environment variable COGL_ATLAS_DEFAULT_BLIT_MODE to one of the following values: * texture-render * framebuffer * copy-tex-sub-image * get-tex-data
2011-01-20 17:45:47 +00:00
/* We cache a pipeline used for migrating on to the context so
that it doesn't have to continuously regenerate a shader
program */
if (ctx->blit_texture_pipeline == NULL)
{
Adds a context arg to cogl_pipeline_new() As we move towards Cogl 2.0 we are aiming to remove the need for a default global CoglContext and so everything should be explicitly related to a context somehow. CoglPipelines are top level objects and so this patch adds a context argument to cogl_pipeline_new(). Reviewed-by: Neil Roberts <neil@linux.intel.com>
2012-02-18 16:03:10 +00:00
ctx->blit_texture_pipeline = cogl_pipeline_new (ctx);
cogl-atlas: Try 4 different approaches for migrating textures Instead of directly banging GL to migrate textures the atlas now uses the CoglFramebuffer API. It will use one of four approaches; it can set up two FBOs and use _cogl_blit_framebuffer to copy between them; it can use a single target fbo and then render the source texture to the FBO using a Cogl draw call; it can use a single FBO and call glCopyTexSubImage2D; or it can fallback to reading all of the texture data back to system memory and uploading it again with a sub texture update. Previously GL calls were used directly because Cogl wasn't able to create a framebuffer without a stencil and depth buffer. However there is now an internal version of cogl_offscreen_new_to_texture which takes a set of flags to disable the two buffers. The code for blitting has now been moved into a separate file called cogl-blit.c because it has become quite long and it may be useful outside of the atlas at some point. The 4 different methods have a fixed order of preference which is: * Texture render between two FBOs * glBlitFramebuffer * glCopyTexSubImage2D * glGetTexImage + glTexSubImage2D Once a method is succesfully used it is tried first for all subsequent blits. The default default can be overridden by setting the environment variable COGL_ATLAS_DEFAULT_BLIT_MODE to one of the following values: * texture-render * framebuffer * copy-tex-sub-image * get-tex-data
2011-01-20 17:45:47 +00:00
cogl_pipeline_set_layer_filters (ctx->blit_texture_pipeline, 0,
COGL_PIPELINE_FILTER_NEAREST,
COGL_PIPELINE_FILTER_NEAREST);
cogl-blit: Disable blending when using texture render When using a pipeline and the journal to blit images between framebuffers, it should disable blending. Otherwise it will end up blending the source texture with uninitialised garbage in the destination texture.
2011-02-24 18:42:47 +00:00
/* Disable blending by just directly taking the contents of the
source texture */
cogl_pipeline_set_blend (ctx->blit_texture_pipeline,
"RGBA = ADD(SRC_COLOR, 0)",
NULL);
cogl-atlas: Try 4 different approaches for migrating textures Instead of directly banging GL to migrate textures the atlas now uses the CoglFramebuffer API. It will use one of four approaches; it can set up two FBOs and use _cogl_blit_framebuffer to copy between them; it can use a single target fbo and then render the source texture to the FBO using a Cogl draw call; it can use a single FBO and call glCopyTexSubImage2D; or it can fallback to reading all of the texture data back to system memory and uploading it again with a sub texture update. Previously GL calls were used directly because Cogl wasn't able to create a framebuffer without a stencil and depth buffer. However there is now an internal version of cogl_offscreen_new_to_texture which takes a set of flags to disable the two buffers. The code for blitting has now been moved into a separate file called cogl-blit.c because it has become quite long and it may be useful outside of the atlas at some point. The 4 different methods have a fixed order of preference which is: * Texture render between two FBOs * glBlitFramebuffer * glCopyTexSubImage2D * glGetTexImage + glTexSubImage2D Once a method is succesfully used it is tried first for all subsequent blits. The default default can be overridden by setting the environment variable COGL_ATLAS_DEFAULT_BLIT_MODE to one of the following values: * texture-render * framebuffer * copy-tex-sub-image * get-tex-data
2011-01-20 17:45:47 +00:00
}
pipeline = ctx->blit_texture_pipeline;
cogl_pipeline_set_layer_texture (pipeline, 0, data->src_tex);
Add internal _cogl_push_source to optionally disable legacy state Some code in Cogl such as when flushing a stencil clip assumes that it can push a temporary simple pipeline to reset to a known state for internal drawing operations. However this breaks down if the application has set any legacy state because that is set globally so it will also get applied to the internal pipeline. _cogl_draw_attributes already had an internal flag to disable applying the legacy state but I think this is quite awkward to use because not all places that push a pipeline draw the attribute buffers directly so it is difficult to pass the flag down through the layers. Conceptually the legacy state is meant to be like a layer on top of the purely pipeline-based state API so I think ideally we should have an internal function to push the source without the applying the legacy state. The legacy state can't be applied as the pipeline is pushed because the global state can be modified even after it is pushed. This patch adds a _cogl_push_source() function which takes an extra boolean flag to mark whether to enable the legacy state. The value of this flag is stored alongside the pipeline in the pipeline stack. Another new internal function called _cogl_get_enable_legacy_state queries whether the top entry in the pipeline stack has legacy state enabled. cogl-primitives and the vertex array drawing code now use this to determine whether to apply the legacy state when drawing. The COGL_DRAW_SKIP_LEGACY_STATE flag is now removed. Reviewed-by: Robert Bragg <robert@linux.intel.com>
2011-09-14 11:17:09 +00:00
_cogl_push_source (pipeline, FALSE);
cogl-atlas: Try 4 different approaches for migrating textures Instead of directly banging GL to migrate textures the atlas now uses the CoglFramebuffer API. It will use one of four approaches; it can set up two FBOs and use _cogl_blit_framebuffer to copy between them; it can use a single target fbo and then render the source texture to the FBO using a Cogl draw call; it can use a single FBO and call glCopyTexSubImage2D; or it can fallback to reading all of the texture data back to system memory and uploading it again with a sub texture update. Previously GL calls were used directly because Cogl wasn't able to create a framebuffer without a stencil and depth buffer. However there is now an internal version of cogl_offscreen_new_to_texture which takes a set of flags to disable the two buffers. The code for blitting has now been moved into a separate file called cogl-blit.c because it has become quite long and it may be useful outside of the atlas at some point. The 4 different methods have a fixed order of preference which is: * Texture render between two FBOs * glBlitFramebuffer * glCopyTexSubImage2D * glGetTexImage + glTexSubImage2D Once a method is succesfully used it is tried first for all subsequent blits. The default default can be overridden by setting the environment variable COGL_ATLAS_DEFAULT_BLIT_MODE to one of the following values: * texture-render * framebuffer * copy-tex-sub-image * get-tex-data
2011-01-20 17:45:47 +00:00
return TRUE;
}
static void
_cogl_blit_texture_render_blit (CoglBlitData *data,
unsigned int src_x,
unsigned int src_y,
unsigned int dst_x,
unsigned int dst_y,
unsigned int width,
unsigned int height)
{
cogl_rectangle_with_texture_coords (dst_x, dst_y,
dst_x + width,
dst_y + height,
src_x / (float) data->src_width,
src_y / (float) data->src_height,
(src_x + width) /
(float) data->src_width,
(src_y + height) /
(float) data->src_height);
}
static void
_cogl_blit_texture_render_end (CoglBlitData *data)
{
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
cogl_pop_source ();
cogl_pop_framebuffer ();
/* Attach the target texture to the texture render pipeline so that
we don't keep a reference to the source texture forever. This is
assuming that the destination texture will live for a long time
which is currently the case when cogl_blit_* is used from the
atlas code. It may be better in future to keep around a set of
dummy 1x1 textures for each texture target that we could bind
instead. This would also be useful when using a pipeline as a
hash table key such as for the ARBfp program cache. */
cogl_pipeline_set_layer_texture (ctx->blit_texture_pipeline, 0,
data->dst_tex);
}
Switch use of primitive glib types to c99 equivalents The coding style has for a long time said to avoid using redundant glib data types such as gint or gchar etc because we feel that they make the code look unnecessarily foreign to developers coming from outside of the Gnome developer community. Note: When we tried to find the historical rationale for the types we just found that they were apparently only added for consistent syntax highlighting which didn't seem that compelling. Up until now we have been continuing to use some of the platform specific type such as gint{8,16,32,64} and gsize but this patch switches us over to using the standard c99 equivalents instead so we can further ensure that our code looks familiar to the widest range of C developers who might potentially contribute to Cogl. So instead of using the gint{8,16,32,64} and guint{8,16,32,64} types this switches all Cogl code to instead use the int{8,16,32,64}_t and uint{8,16,32,64}_t c99 types instead. Instead of gsize we now use size_t For now we are not going to use the c99 _Bool type and instead we have introduced a new CoglBool type to use instead of gboolean. Reviewed-by: Neil Roberts <neil@linux.intel.com> (cherry picked from commit 5967dad2400d32ca6319cef6cb572e81bf2c15f0)
2012-04-16 20:56:40 +00:00
static CoglBool
cogl-atlas: Try 4 different approaches for migrating textures Instead of directly banging GL to migrate textures the atlas now uses the CoglFramebuffer API. It will use one of four approaches; it can set up two FBOs and use _cogl_blit_framebuffer to copy between them; it can use a single target fbo and then render the source texture to the FBO using a Cogl draw call; it can use a single FBO and call glCopyTexSubImage2D; or it can fallback to reading all of the texture data back to system memory and uploading it again with a sub texture update. Previously GL calls were used directly because Cogl wasn't able to create a framebuffer without a stencil and depth buffer. However there is now an internal version of cogl_offscreen_new_to_texture which takes a set of flags to disable the two buffers. The code for blitting has now been moved into a separate file called cogl-blit.c because it has become quite long and it may be useful outside of the atlas at some point. The 4 different methods have a fixed order of preference which is: * Texture render between two FBOs * glBlitFramebuffer * glCopyTexSubImage2D * glGetTexImage + glTexSubImage2D Once a method is succesfully used it is tried first for all subsequent blits. The default default can be overridden by setting the environment variable COGL_ATLAS_DEFAULT_BLIT_MODE to one of the following values: * texture-render * framebuffer * copy-tex-sub-image * get-tex-data
2011-01-20 17:45:47 +00:00
_cogl_blit_framebuffer_begin (CoglBlitData *data)
{
Removes all remaining use of CoglHandle Removing CoglHandle has been an on going goal for quite a long time now and finally this patch removes the last remaining uses of the CoglHandle type and the cogl_handle_ apis. Since the big remaining users of CoglHandle were the cogl_program_ and cogl_shader_ apis which have replaced with the CoglSnippets api this patch removes both of these apis. Reviewed-by: Neil Roberts <neil@linux.intel.com> (cherry picked from commit 6ed3aaf4be21d605a1ed3176b3ea825933f85cf0) Since the original patch was done after removing deprecated API this back ported patch doesn't affect deprecated API and so actually this cherry-pick doesn't remove all remaining use of CoglHandle as it did for the master branch of Cogl.
2012-04-16 13:14:10 +00:00
CoglOffscreen *dst_offscreen = NULL, *src_offscreen = NULL;
CoglFramebuffer *dst_fb, *src_fb;
cogl-atlas: Try 4 different approaches for migrating textures Instead of directly banging GL to migrate textures the atlas now uses the CoglFramebuffer API. It will use one of four approaches; it can set up two FBOs and use _cogl_blit_framebuffer to copy between them; it can use a single target fbo and then render the source texture to the FBO using a Cogl draw call; it can use a single FBO and call glCopyTexSubImage2D; or it can fallback to reading all of the texture data back to system memory and uploading it again with a sub texture update. Previously GL calls were used directly because Cogl wasn't able to create a framebuffer without a stencil and depth buffer. However there is now an internal version of cogl_offscreen_new_to_texture which takes a set of flags to disable the two buffers. The code for blitting has now been moved into a separate file called cogl-blit.c because it has become quite long and it may be useful outside of the atlas at some point. The 4 different methods have a fixed order of preference which is: * Texture render between two FBOs * glBlitFramebuffer * glCopyTexSubImage2D * glGetTexImage + glTexSubImage2D Once a method is succesfully used it is tried first for all subsequent blits. The default default can be overridden by setting the environment variable COGL_ATLAS_DEFAULT_BLIT_MODE to one of the following values: * texture-render * framebuffer * copy-tex-sub-image * get-tex-data
2011-01-20 17:45:47 +00:00
_COGL_GET_CONTEXT (ctx, FALSE);
/* We can only blit between FBOs if both textures are the same
format and the blit framebuffer extension is supported */
if ((cogl_texture_get_format (data->src_tex) & ~COGL_A_BIT) !=
(cogl_texture_get_format (data->dst_tex) & ~COGL_A_BIT) ||
make COGL_FEATURE_OFFSCREEN_BLIT a private feature Cogl doesn't expose public api for blitting between framebuffers so it doesn't make much sense to have this feature as part of the public api currently. We can't break the api by removing the enum but at least we no longer ever set the feature flag. We now have a replacement private feature flag COGL_PRIVATE_FEATURE_OFFSCREEN_BLIT which cogl now checks for internally. Reviewed-by: Neil Roberts <neil@linux.intel.com>
2011-10-12 21:47:42 +00:00
!(ctx->private_feature_flags & COGL_PRIVATE_FEATURE_OFFSCREEN_BLIT))
cogl-atlas: Try 4 different approaches for migrating textures Instead of directly banging GL to migrate textures the atlas now uses the CoglFramebuffer API. It will use one of four approaches; it can set up two FBOs and use _cogl_blit_framebuffer to copy between them; it can use a single target fbo and then render the source texture to the FBO using a Cogl draw call; it can use a single FBO and call glCopyTexSubImage2D; or it can fallback to reading all of the texture data back to system memory and uploading it again with a sub texture update. Previously GL calls were used directly because Cogl wasn't able to create a framebuffer without a stencil and depth buffer. However there is now an internal version of cogl_offscreen_new_to_texture which takes a set of flags to disable the two buffers. The code for blitting has now been moved into a separate file called cogl-blit.c because it has become quite long and it may be useful outside of the atlas at some point. The 4 different methods have a fixed order of preference which is: * Texture render between two FBOs * glBlitFramebuffer * glCopyTexSubImage2D * glGetTexImage + glTexSubImage2D Once a method is succesfully used it is tried first for all subsequent blits. The default default can be overridden by setting the environment variable COGL_ATLAS_DEFAULT_BLIT_MODE to one of the following values: * texture-render * framebuffer * copy-tex-sub-image * get-tex-data
2011-01-20 17:45:47 +00:00
return FALSE;
Removes all remaining use of CoglHandle Removing CoglHandle has been an on going goal for quite a long time now and finally this patch removes the last remaining uses of the CoglHandle type and the cogl_handle_ apis. Since the big remaining users of CoglHandle were the cogl_program_ and cogl_shader_ apis which have replaced with the CoglSnippets api this patch removes both of these apis. Reviewed-by: Neil Roberts <neil@linux.intel.com> (cherry picked from commit 6ed3aaf4be21d605a1ed3176b3ea825933f85cf0) Since the original patch was done after removing deprecated API this back ported patch doesn't affect deprecated API and so actually this cherry-pick doesn't remove all remaining use of CoglHandle as it did for the master branch of Cogl.
2012-04-16 13:14:10 +00:00
dst_offscreen = _cogl_offscreen_new_to_texture_full
cogl-atlas: Try 4 different approaches for migrating textures Instead of directly banging GL to migrate textures the atlas now uses the CoglFramebuffer API. It will use one of four approaches; it can set up two FBOs and use _cogl_blit_framebuffer to copy between them; it can use a single target fbo and then render the source texture to the FBO using a Cogl draw call; it can use a single FBO and call glCopyTexSubImage2D; or it can fallback to reading all of the texture data back to system memory and uploading it again with a sub texture update. Previously GL calls were used directly because Cogl wasn't able to create a framebuffer without a stencil and depth buffer. However there is now an internal version of cogl_offscreen_new_to_texture which takes a set of flags to disable the two buffers. The code for blitting has now been moved into a separate file called cogl-blit.c because it has become quite long and it may be useful outside of the atlas at some point. The 4 different methods have a fixed order of preference which is: * Texture render between two FBOs * glBlitFramebuffer * glCopyTexSubImage2D * glGetTexImage + glTexSubImage2D Once a method is succesfully used it is tried first for all subsequent blits. The default default can be overridden by setting the environment variable COGL_ATLAS_DEFAULT_BLIT_MODE to one of the following values: * texture-render * framebuffer * copy-tex-sub-image * get-tex-data
2011-01-20 17:45:47 +00:00
(data->dst_tex, COGL_OFFSCREEN_DISABLE_DEPTH_AND_STENCIL, 0 /* level */);
Removes all remaining use of CoglHandle Removing CoglHandle has been an on going goal for quite a long time now and finally this patch removes the last remaining uses of the CoglHandle type and the cogl_handle_ apis. Since the big remaining users of CoglHandle were the cogl_program_ and cogl_shader_ apis which have replaced with the CoglSnippets api this patch removes both of these apis. Reviewed-by: Neil Roberts <neil@linux.intel.com> (cherry picked from commit 6ed3aaf4be21d605a1ed3176b3ea825933f85cf0) Since the original patch was done after removing deprecated API this back ported patch doesn't affect deprecated API and so actually this cherry-pick doesn't remove all remaining use of CoglHandle as it did for the master branch of Cogl.
2012-04-16 13:14:10 +00:00
if (dst_offscreen == NULL)
return FALSE;
cogl-atlas: Try 4 different approaches for migrating textures Instead of directly banging GL to migrate textures the atlas now uses the CoglFramebuffer API. It will use one of four approaches; it can set up two FBOs and use _cogl_blit_framebuffer to copy between them; it can use a single target fbo and then render the source texture to the FBO using a Cogl draw call; it can use a single FBO and call glCopyTexSubImage2D; or it can fallback to reading all of the texture data back to system memory and uploading it again with a sub texture update. Previously GL calls were used directly because Cogl wasn't able to create a framebuffer without a stencil and depth buffer. However there is now an internal version of cogl_offscreen_new_to_texture which takes a set of flags to disable the two buffers. The code for blitting has now been moved into a separate file called cogl-blit.c because it has become quite long and it may be useful outside of the atlas at some point. The 4 different methods have a fixed order of preference which is: * Texture render between two FBOs * glBlitFramebuffer * glCopyTexSubImage2D * glGetTexImage + glTexSubImage2D Once a method is succesfully used it is tried first for all subsequent blits. The default default can be overridden by setting the environment variable COGL_ATLAS_DEFAULT_BLIT_MODE to one of the following values: * texture-render * framebuffer * copy-tex-sub-image * get-tex-data
2011-01-20 17:45:47 +00:00
Removes all remaining use of CoglHandle Removing CoglHandle has been an on going goal for quite a long time now and finally this patch removes the last remaining uses of the CoglHandle type and the cogl_handle_ apis. Since the big remaining users of CoglHandle were the cogl_program_ and cogl_shader_ apis which have replaced with the CoglSnippets api this patch removes both of these apis. Reviewed-by: Neil Roberts <neil@linux.intel.com> (cherry picked from commit 6ed3aaf4be21d605a1ed3176b3ea825933f85cf0) Since the original patch was done after removing deprecated API this back ported patch doesn't affect deprecated API and so actually this cherry-pick doesn't remove all remaining use of CoglHandle as it did for the master branch of Cogl.
2012-04-16 13:14:10 +00:00
dst_fb = COGL_FRAMEBUFFER (dst_offscreen);
if (!cogl_framebuffer_allocate (dst_fb, NULL))
goto ERROR;
src_offscreen= _cogl_offscreen_new_to_texture_full
(data->src_tex,
COGL_OFFSCREEN_DISABLE_DEPTH_AND_STENCIL,
0 /* level */);
if (src_offscreen == NULL)
goto ERROR;
src_fb = COGL_FRAMEBUFFER (src_offscreen);
if (!cogl_framebuffer_allocate (src_fb, NULL))
goto ERROR;
_cogl_push_framebuffers (dst_fb, src_fb);
return TRUE;
ERROR:
if (dst_offscreen)
cogl_object_unref (dst_offscreen);
if (src_offscreen)
cogl_object_unref (src_offscreen);
cogl-atlas: Try 4 different approaches for migrating textures Instead of directly banging GL to migrate textures the atlas now uses the CoglFramebuffer API. It will use one of four approaches; it can set up two FBOs and use _cogl_blit_framebuffer to copy between them; it can use a single target fbo and then render the source texture to the FBO using a Cogl draw call; it can use a single FBO and call glCopyTexSubImage2D; or it can fallback to reading all of the texture data back to system memory and uploading it again with a sub texture update. Previously GL calls were used directly because Cogl wasn't able to create a framebuffer without a stencil and depth buffer. However there is now an internal version of cogl_offscreen_new_to_texture which takes a set of flags to disable the two buffers. The code for blitting has now been moved into a separate file called cogl-blit.c because it has become quite long and it may be useful outside of the atlas at some point. The 4 different methods have a fixed order of preference which is: * Texture render between two FBOs * glBlitFramebuffer * glCopyTexSubImage2D * glGetTexImage + glTexSubImage2D Once a method is succesfully used it is tried first for all subsequent blits. The default default can be overridden by setting the environment variable COGL_ATLAS_DEFAULT_BLIT_MODE to one of the following values: * texture-render * framebuffer * copy-tex-sub-image * get-tex-data
2011-01-20 17:45:47 +00:00
Removes all remaining use of CoglHandle Removing CoglHandle has been an on going goal for quite a long time now and finally this patch removes the last remaining uses of the CoglHandle type and the cogl_handle_ apis. Since the big remaining users of CoglHandle were the cogl_program_ and cogl_shader_ apis which have replaced with the CoglSnippets api this patch removes both of these apis. Reviewed-by: Neil Roberts <neil@linux.intel.com> (cherry picked from commit 6ed3aaf4be21d605a1ed3176b3ea825933f85cf0) Since the original patch was done after removing deprecated API this back ported patch doesn't affect deprecated API and so actually this cherry-pick doesn't remove all remaining use of CoglHandle as it did for the master branch of Cogl.
2012-04-16 13:14:10 +00:00
return FALSE;
cogl-atlas: Try 4 different approaches for migrating textures Instead of directly banging GL to migrate textures the atlas now uses the CoglFramebuffer API. It will use one of four approaches; it can set up two FBOs and use _cogl_blit_framebuffer to copy between them; it can use a single target fbo and then render the source texture to the FBO using a Cogl draw call; it can use a single FBO and call glCopyTexSubImage2D; or it can fallback to reading all of the texture data back to system memory and uploading it again with a sub texture update. Previously GL calls were used directly because Cogl wasn't able to create a framebuffer without a stencil and depth buffer. However there is now an internal version of cogl_offscreen_new_to_texture which takes a set of flags to disable the two buffers. The code for blitting has now been moved into a separate file called cogl-blit.c because it has become quite long and it may be useful outside of the atlas at some point. The 4 different methods have a fixed order of preference which is: * Texture render between two FBOs * glBlitFramebuffer * glCopyTexSubImage2D * glGetTexImage + glTexSubImage2D Once a method is succesfully used it is tried first for all subsequent blits. The default default can be overridden by setting the environment variable COGL_ATLAS_DEFAULT_BLIT_MODE to one of the following values: * texture-render * framebuffer * copy-tex-sub-image * get-tex-data
2011-01-20 17:45:47 +00:00
}
static void
_cogl_blit_framebuffer_blit (CoglBlitData *data,
unsigned int src_x,
unsigned int src_y,
unsigned int dst_x,
unsigned int dst_y,
unsigned int width,
unsigned int height)
{
_cogl_blit_framebuffer (src_x, src_y,
dst_x, dst_y,
width, height);
}
static void
_cogl_blit_framebuffer_end (CoglBlitData *data)
{
cogl_pop_framebuffer ();
}
Switch use of primitive glib types to c99 equivalents The coding style has for a long time said to avoid using redundant glib data types such as gint or gchar etc because we feel that they make the code look unnecessarily foreign to developers coming from outside of the Gnome developer community. Note: When we tried to find the historical rationale for the types we just found that they were apparently only added for consistent syntax highlighting which didn't seem that compelling. Up until now we have been continuing to use some of the platform specific type such as gint{8,16,32,64} and gsize but this patch switches us over to using the standard c99 equivalents instead so we can further ensure that our code looks familiar to the widest range of C developers who might potentially contribute to Cogl. So instead of using the gint{8,16,32,64} and guint{8,16,32,64} types this switches all Cogl code to instead use the int{8,16,32,64}_t and uint{8,16,32,64}_t c99 types instead. Instead of gsize we now use size_t For now we are not going to use the c99 _Bool type and instead we have introduced a new CoglBool type to use instead of gboolean. Reviewed-by: Neil Roberts <neil@linux.intel.com> (cherry picked from commit 5967dad2400d32ca6319cef6cb572e81bf2c15f0)
2012-04-16 20:56:40 +00:00
static CoglBool
cogl-atlas: Try 4 different approaches for migrating textures Instead of directly banging GL to migrate textures the atlas now uses the CoglFramebuffer API. It will use one of four approaches; it can set up two FBOs and use _cogl_blit_framebuffer to copy between them; it can use a single target fbo and then render the source texture to the FBO using a Cogl draw call; it can use a single FBO and call glCopyTexSubImage2D; or it can fallback to reading all of the texture data back to system memory and uploading it again with a sub texture update. Previously GL calls were used directly because Cogl wasn't able to create a framebuffer without a stencil and depth buffer. However there is now an internal version of cogl_offscreen_new_to_texture which takes a set of flags to disable the two buffers. The code for blitting has now been moved into a separate file called cogl-blit.c because it has become quite long and it may be useful outside of the atlas at some point. The 4 different methods have a fixed order of preference which is: * Texture render between two FBOs * glBlitFramebuffer * glCopyTexSubImage2D * glGetTexImage + glTexSubImage2D Once a method is succesfully used it is tried first for all subsequent blits. The default default can be overridden by setting the environment variable COGL_ATLAS_DEFAULT_BLIT_MODE to one of the following values: * texture-render * framebuffer * copy-tex-sub-image * get-tex-data
2011-01-20 17:45:47 +00:00
_cogl_blit_copy_tex_sub_image_begin (CoglBlitData *data)
{
Removes all remaining use of CoglHandle Removing CoglHandle has been an on going goal for quite a long time now and finally this patch removes the last remaining uses of the CoglHandle type and the cogl_handle_ apis. Since the big remaining users of CoglHandle were the cogl_program_ and cogl_shader_ apis which have replaced with the CoglSnippets api this patch removes both of these apis. Reviewed-by: Neil Roberts <neil@linux.intel.com> (cherry picked from commit 6ed3aaf4be21d605a1ed3176b3ea825933f85cf0) Since the original patch was done after removing deprecated API this back ported patch doesn't affect deprecated API and so actually this cherry-pick doesn't remove all remaining use of CoglHandle as it did for the master branch of Cogl.
2012-04-16 13:14:10 +00:00
CoglOffscreen *offscreen;
CoglFramebuffer *fb;
cogl-atlas: Try 4 different approaches for migrating textures Instead of directly banging GL to migrate textures the atlas now uses the CoglFramebuffer API. It will use one of four approaches; it can set up two FBOs and use _cogl_blit_framebuffer to copy between them; it can use a single target fbo and then render the source texture to the FBO using a Cogl draw call; it can use a single FBO and call glCopyTexSubImage2D; or it can fallback to reading all of the texture data back to system memory and uploading it again with a sub texture update. Previously GL calls were used directly because Cogl wasn't able to create a framebuffer without a stencil and depth buffer. However there is now an internal version of cogl_offscreen_new_to_texture which takes a set of flags to disable the two buffers. The code for blitting has now been moved into a separate file called cogl-blit.c because it has become quite long and it may be useful outside of the atlas at some point. The 4 different methods have a fixed order of preference which is: * Texture render between two FBOs * glBlitFramebuffer * glCopyTexSubImage2D * glGetTexImage + glTexSubImage2D Once a method is succesfully used it is tried first for all subsequent blits. The default default can be overridden by setting the environment variable COGL_ATLAS_DEFAULT_BLIT_MODE to one of the following values: * texture-render * framebuffer * copy-tex-sub-image * get-tex-data
2011-01-20 17:45:47 +00:00
_COGL_GET_CONTEXT (ctx, FALSE);
/* This will only work if the target texture is a CoglTexture2D */
Make CoglTexture2D public as experimental API This exposes a CoglTexture2D typedef and adds the following experimental API: cogl_is_texture_2d cogl_texture_2d_new_with_size cogl_texture_2d_new_from_data cogl_texture_2d_new_from_foreign Since this is experimental API you need to define COGL_ENABLE_EXPERIMENTAL_API before including cogl.h. Note: With these new entrypoints we now expect a CoglContext pointer to be passed in, instead of assuming there is a default context. The aim is that for Cogl 2.0 we won't have a default context so this is a step in that direction.
2011-05-16 23:05:54 +00:00
if (!cogl_is_texture_2d (data->dst_tex))
cogl-atlas: Try 4 different approaches for migrating textures Instead of directly banging GL to migrate textures the atlas now uses the CoglFramebuffer API. It will use one of four approaches; it can set up two FBOs and use _cogl_blit_framebuffer to copy between them; it can use a single target fbo and then render the source texture to the FBO using a Cogl draw call; it can use a single FBO and call glCopyTexSubImage2D; or it can fallback to reading all of the texture data back to system memory and uploading it again with a sub texture update. Previously GL calls were used directly because Cogl wasn't able to create a framebuffer without a stencil and depth buffer. However there is now an internal version of cogl_offscreen_new_to_texture which takes a set of flags to disable the two buffers. The code for blitting has now been moved into a separate file called cogl-blit.c because it has become quite long and it may be useful outside of the atlas at some point. The 4 different methods have a fixed order of preference which is: * Texture render between two FBOs * glBlitFramebuffer * glCopyTexSubImage2D * glGetTexImage + glTexSubImage2D Once a method is succesfully used it is tried first for all subsequent blits. The default default can be overridden by setting the environment variable COGL_ATLAS_DEFAULT_BLIT_MODE to one of the following values: * texture-render * framebuffer * copy-tex-sub-image * get-tex-data
2011-01-20 17:45:47 +00:00
return FALSE;
Removes all remaining use of CoglHandle Removing CoglHandle has been an on going goal for quite a long time now and finally this patch removes the last remaining uses of the CoglHandle type and the cogl_handle_ apis. Since the big remaining users of CoglHandle were the cogl_program_ and cogl_shader_ apis which have replaced with the CoglSnippets api this patch removes both of these apis. Reviewed-by: Neil Roberts <neil@linux.intel.com> (cherry picked from commit 6ed3aaf4be21d605a1ed3176b3ea825933f85cf0) Since the original patch was done after removing deprecated API this back ported patch doesn't affect deprecated API and so actually this cherry-pick doesn't remove all remaining use of CoglHandle as it did for the master branch of Cogl.
2012-04-16 13:14:10 +00:00
offscreen = _cogl_offscreen_new_to_texture_full
cogl-atlas: Try 4 different approaches for migrating textures Instead of directly banging GL to migrate textures the atlas now uses the CoglFramebuffer API. It will use one of four approaches; it can set up two FBOs and use _cogl_blit_framebuffer to copy between them; it can use a single target fbo and then render the source texture to the FBO using a Cogl draw call; it can use a single FBO and call glCopyTexSubImage2D; or it can fallback to reading all of the texture data back to system memory and uploading it again with a sub texture update. Previously GL calls were used directly because Cogl wasn't able to create a framebuffer without a stencil and depth buffer. However there is now an internal version of cogl_offscreen_new_to_texture which takes a set of flags to disable the two buffers. The code for blitting has now been moved into a separate file called cogl-blit.c because it has become quite long and it may be useful outside of the atlas at some point. The 4 different methods have a fixed order of preference which is: * Texture render between two FBOs * glBlitFramebuffer * glCopyTexSubImage2D * glGetTexImage + glTexSubImage2D Once a method is succesfully used it is tried first for all subsequent blits. The default default can be overridden by setting the environment variable COGL_ATLAS_DEFAULT_BLIT_MODE to one of the following values: * texture-render * framebuffer * copy-tex-sub-image * get-tex-data
2011-01-20 17:45:47 +00:00
(data->src_tex, COGL_OFFSCREEN_DISABLE_DEPTH_AND_STENCIL, 0 /* level */);
Removes all remaining use of CoglHandle Removing CoglHandle has been an on going goal for quite a long time now and finally this patch removes the last remaining uses of the CoglHandle type and the cogl_handle_ apis. Since the big remaining users of CoglHandle were the cogl_program_ and cogl_shader_ apis which have replaced with the CoglSnippets api this patch removes both of these apis. Reviewed-by: Neil Roberts <neil@linux.intel.com> (cherry picked from commit 6ed3aaf4be21d605a1ed3176b3ea825933f85cf0) Since the original patch was done after removing deprecated API this back ported patch doesn't affect deprecated API and so actually this cherry-pick doesn't remove all remaining use of CoglHandle as it did for the master branch of Cogl.
2012-04-16 13:14:10 +00:00
if (offscreen == NULL)
cogl-atlas: Try 4 different approaches for migrating textures Instead of directly banging GL to migrate textures the atlas now uses the CoglFramebuffer API. It will use one of four approaches; it can set up two FBOs and use _cogl_blit_framebuffer to copy between them; it can use a single target fbo and then render the source texture to the FBO using a Cogl draw call; it can use a single FBO and call glCopyTexSubImage2D; or it can fallback to reading all of the texture data back to system memory and uploading it again with a sub texture update. Previously GL calls were used directly because Cogl wasn't able to create a framebuffer without a stencil and depth buffer. However there is now an internal version of cogl_offscreen_new_to_texture which takes a set of flags to disable the two buffers. The code for blitting has now been moved into a separate file called cogl-blit.c because it has become quite long and it may be useful outside of the atlas at some point. The 4 different methods have a fixed order of preference which is: * Texture render between two FBOs * glBlitFramebuffer * glCopyTexSubImage2D * glGetTexImage + glTexSubImage2D Once a method is succesfully used it is tried first for all subsequent blits. The default default can be overridden by setting the environment variable COGL_ATLAS_DEFAULT_BLIT_MODE to one of the following values: * texture-render * framebuffer * copy-tex-sub-image * get-tex-data
2011-01-20 17:45:47 +00:00
return FALSE;
Removes all remaining use of CoglHandle Removing CoglHandle has been an on going goal for quite a long time now and finally this patch removes the last remaining uses of the CoglHandle type and the cogl_handle_ apis. Since the big remaining users of CoglHandle were the cogl_program_ and cogl_shader_ apis which have replaced with the CoglSnippets api this patch removes both of these apis. Reviewed-by: Neil Roberts <neil@linux.intel.com> (cherry picked from commit 6ed3aaf4be21d605a1ed3176b3ea825933f85cf0) Since the original patch was done after removing deprecated API this back ported patch doesn't affect deprecated API and so actually this cherry-pick doesn't remove all remaining use of CoglHandle as it did for the master branch of Cogl.
2012-04-16 13:14:10 +00:00
fb = COGL_FRAMEBUFFER (offscreen);
if (!cogl_framebuffer_allocate (fb, NULL))
When internally using an FBO, check for allocation errors Both the cogl_texture_get_data and _cogl_blit_begin implementations will internally try to create an FBO for a texture and have fallbacks if the FBO fails. However neither of them were catching errors when allocating the framebuffer so the fallback wouldn't work properly. This patch just adds an explicit call to cogl_framebuffer_allocate for these uses and causes it to use the next fallback if it fails. Based on a patch by Adel Gadllah. https://bugzilla.gnome.org/show_bug.cgi?id=669368 Reviewed-by: Robert Bragg <robert@linux.intel.com>
2012-02-06 12:23:39 +00:00
{
Removes all remaining use of CoglHandle Removing CoglHandle has been an on going goal for quite a long time now and finally this patch removes the last remaining uses of the CoglHandle type and the cogl_handle_ apis. Since the big remaining users of CoglHandle were the cogl_program_ and cogl_shader_ apis which have replaced with the CoglSnippets api this patch removes both of these apis. Reviewed-by: Neil Roberts <neil@linux.intel.com> (cherry picked from commit 6ed3aaf4be21d605a1ed3176b3ea825933f85cf0) Since the original patch was done after removing deprecated API this back ported patch doesn't affect deprecated API and so actually this cherry-pick doesn't remove all remaining use of CoglHandle as it did for the master branch of Cogl.
2012-04-16 13:14:10 +00:00
cogl_object_unref (fb);
When internally using an FBO, check for allocation errors Both the cogl_texture_get_data and _cogl_blit_begin implementations will internally try to create an FBO for a texture and have fallbacks if the FBO fails. However neither of them were catching errors when allocating the framebuffer so the fallback wouldn't work properly. This patch just adds an explicit call to cogl_framebuffer_allocate for these uses and causes it to use the next fallback if it fails. Based on a patch by Adel Gadllah. https://bugzilla.gnome.org/show_bug.cgi?id=669368 Reviewed-by: Robert Bragg <robert@linux.intel.com>
2012-02-06 12:23:39 +00:00
return FALSE;
}
Removes all remaining use of CoglHandle Removing CoglHandle has been an on going goal for quite a long time now and finally this patch removes the last remaining uses of the CoglHandle type and the cogl_handle_ apis. Since the big remaining users of CoglHandle were the cogl_program_ and cogl_shader_ apis which have replaced with the CoglSnippets api this patch removes both of these apis. Reviewed-by: Neil Roberts <neil@linux.intel.com> (cherry picked from commit 6ed3aaf4be21d605a1ed3176b3ea825933f85cf0) Since the original patch was done after removing deprecated API this back ported patch doesn't affect deprecated API and so actually this cherry-pick doesn't remove all remaining use of CoglHandle as it did for the master branch of Cogl.
2012-04-16 13:14:10 +00:00
cogl_push_framebuffer (fb);
cogl_object_unref (fb);
cogl-atlas: Try 4 different approaches for migrating textures Instead of directly banging GL to migrate textures the atlas now uses the CoglFramebuffer API. It will use one of four approaches; it can set up two FBOs and use _cogl_blit_framebuffer to copy between them; it can use a single target fbo and then render the source texture to the FBO using a Cogl draw call; it can use a single FBO and call glCopyTexSubImage2D; or it can fallback to reading all of the texture data back to system memory and uploading it again with a sub texture update. Previously GL calls were used directly because Cogl wasn't able to create a framebuffer without a stencil and depth buffer. However there is now an internal version of cogl_offscreen_new_to_texture which takes a set of flags to disable the two buffers. The code for blitting has now been moved into a separate file called cogl-blit.c because it has become quite long and it may be useful outside of the atlas at some point. The 4 different methods have a fixed order of preference which is: * Texture render between two FBOs * glBlitFramebuffer * glCopyTexSubImage2D * glGetTexImage + glTexSubImage2D Once a method is succesfully used it is tried first for all subsequent blits. The default default can be overridden by setting the environment variable COGL_ATLAS_DEFAULT_BLIT_MODE to one of the following values: * texture-render * framebuffer * copy-tex-sub-image * get-tex-data
2011-01-20 17:45:47 +00:00
return TRUE;
}
static void
_cogl_blit_copy_tex_sub_image_blit (CoglBlitData *data,
unsigned int src_x,
unsigned int src_y,
unsigned int dst_x,
unsigned int dst_y,
unsigned int width,
unsigned int height)
{
Removes all remaining use of CoglHandle Removing CoglHandle has been an on going goal for quite a long time now and finally this patch removes the last remaining uses of the CoglHandle type and the cogl_handle_ apis. Since the big remaining users of CoglHandle were the cogl_program_ and cogl_shader_ apis which have replaced with the CoglSnippets api this patch removes both of these apis. Reviewed-by: Neil Roberts <neil@linux.intel.com> (cherry picked from commit 6ed3aaf4be21d605a1ed3176b3ea825933f85cf0) Since the original patch was done after removing deprecated API this back ported patch doesn't affect deprecated API and so actually this cherry-pick doesn't remove all remaining use of CoglHandle as it did for the master branch of Cogl.
2012-04-16 13:14:10 +00:00
_cogl_texture_2d_copy_from_framebuffer (COGL_TEXTURE_2D (data->dst_tex),
cogl-atlas: Try 4 different approaches for migrating textures Instead of directly banging GL to migrate textures the atlas now uses the CoglFramebuffer API. It will use one of four approaches; it can set up two FBOs and use _cogl_blit_framebuffer to copy between them; it can use a single target fbo and then render the source texture to the FBO using a Cogl draw call; it can use a single FBO and call glCopyTexSubImage2D; or it can fallback to reading all of the texture data back to system memory and uploading it again with a sub texture update. Previously GL calls were used directly because Cogl wasn't able to create a framebuffer without a stencil and depth buffer. However there is now an internal version of cogl_offscreen_new_to_texture which takes a set of flags to disable the two buffers. The code for blitting has now been moved into a separate file called cogl-blit.c because it has become quite long and it may be useful outside of the atlas at some point. The 4 different methods have a fixed order of preference which is: * Texture render between two FBOs * glBlitFramebuffer * glCopyTexSubImage2D * glGetTexImage + glTexSubImage2D Once a method is succesfully used it is tried first for all subsequent blits. The default default can be overridden by setting the environment variable COGL_ATLAS_DEFAULT_BLIT_MODE to one of the following values: * texture-render * framebuffer * copy-tex-sub-image * get-tex-data
2011-01-20 17:45:47 +00:00
dst_x, dst_y,
src_x, src_y,
width, height);
}
static void
_cogl_blit_copy_tex_sub_image_end (CoglBlitData *data)
{
cogl_pop_framebuffer ();
}
Switch use of primitive glib types to c99 equivalents The coding style has for a long time said to avoid using redundant glib data types such as gint or gchar etc because we feel that they make the code look unnecessarily foreign to developers coming from outside of the Gnome developer community. Note: When we tried to find the historical rationale for the types we just found that they were apparently only added for consistent syntax highlighting which didn't seem that compelling. Up until now we have been continuing to use some of the platform specific type such as gint{8,16,32,64} and gsize but this patch switches us over to using the standard c99 equivalents instead so we can further ensure that our code looks familiar to the widest range of C developers who might potentially contribute to Cogl. So instead of using the gint{8,16,32,64} and guint{8,16,32,64} types this switches all Cogl code to instead use the int{8,16,32,64}_t and uint{8,16,32,64}_t c99 types instead. Instead of gsize we now use size_t For now we are not going to use the c99 _Bool type and instead we have introduced a new CoglBool type to use instead of gboolean. Reviewed-by: Neil Roberts <neil@linux.intel.com> (cherry picked from commit 5967dad2400d32ca6319cef6cb572e81bf2c15f0)
2012-04-16 20:56:40 +00:00
static CoglBool
cogl-atlas: Try 4 different approaches for migrating textures Instead of directly banging GL to migrate textures the atlas now uses the CoglFramebuffer API. It will use one of four approaches; it can set up two FBOs and use _cogl_blit_framebuffer to copy between them; it can use a single target fbo and then render the source texture to the FBO using a Cogl draw call; it can use a single FBO and call glCopyTexSubImage2D; or it can fallback to reading all of the texture data back to system memory and uploading it again with a sub texture update. Previously GL calls were used directly because Cogl wasn't able to create a framebuffer without a stencil and depth buffer. However there is now an internal version of cogl_offscreen_new_to_texture which takes a set of flags to disable the two buffers. The code for blitting has now been moved into a separate file called cogl-blit.c because it has become quite long and it may be useful outside of the atlas at some point. The 4 different methods have a fixed order of preference which is: * Texture render between two FBOs * glBlitFramebuffer * glCopyTexSubImage2D * glGetTexImage + glTexSubImage2D Once a method is succesfully used it is tried first for all subsequent blits. The default default can be overridden by setting the environment variable COGL_ATLAS_DEFAULT_BLIT_MODE to one of the following values: * texture-render * framebuffer * copy-tex-sub-image * get-tex-data
2011-01-20 17:45:47 +00:00
_cogl_blit_get_tex_data_begin (CoglBlitData *data)
{
data->format = cogl_texture_get_format (data->src_tex);
moves and renames _cogl_get_format_bpp This moves _cogl_get_format_bpp from cogl-bitmap.c to cogl.c and renames it to _cogl_pixel_format_get_bytes_per_pixel. This makes it clearer that it doesn't return bits per pixel and makes the naming consistent with other cogl api. The prototype has been moved to cogl-private.h since it seems we should be aiming to get rid of cogl-internal.h at some point. The patch also adds a simple gtk-doc comment since we might want to make this api public. Reviewed-by: Neil Roberts <neil@linux.intel.com>
2012-02-13 23:02:04 +00:00
data->bpp = _cogl_pixel_format_get_bytes_per_pixel (data->format);
cogl-atlas: Try 4 different approaches for migrating textures Instead of directly banging GL to migrate textures the atlas now uses the CoglFramebuffer API. It will use one of four approaches; it can set up two FBOs and use _cogl_blit_framebuffer to copy between them; it can use a single target fbo and then render the source texture to the FBO using a Cogl draw call; it can use a single FBO and call glCopyTexSubImage2D; or it can fallback to reading all of the texture data back to system memory and uploading it again with a sub texture update. Previously GL calls were used directly because Cogl wasn't able to create a framebuffer without a stencil and depth buffer. However there is now an internal version of cogl_offscreen_new_to_texture which takes a set of flags to disable the two buffers. The code for blitting has now been moved into a separate file called cogl-blit.c because it has become quite long and it may be useful outside of the atlas at some point. The 4 different methods have a fixed order of preference which is: * Texture render between two FBOs * glBlitFramebuffer * glCopyTexSubImage2D * glGetTexImage + glTexSubImage2D Once a method is succesfully used it is tried first for all subsequent blits. The default default can be overridden by setting the environment variable COGL_ATLAS_DEFAULT_BLIT_MODE to one of the following values: * texture-render * framebuffer * copy-tex-sub-image * get-tex-data
2011-01-20 17:45:47 +00:00
data->image_data = g_malloc (data->bpp * data->src_width *
data->src_height);
cogl_texture_get_data (data->src_tex, data->format,
data->src_width * data->bpp, data->image_data);
return TRUE;
}
static void
_cogl_blit_get_tex_data_blit (CoglBlitData *data,
unsigned int src_x,
unsigned int src_y,
unsigned int dst_x,
unsigned int dst_y,
unsigned int width,
unsigned int height)
{
cogl_texture_set_region (data->dst_tex,
src_x, src_y,
dst_x, dst_y,
width, height,
data->src_width, data->src_height,
data->format,
data->src_width * data->bpp,
data->image_data);
}
static void
_cogl_blit_get_tex_data_end (CoglBlitData *data)
{
g_free (data->image_data);
}
/* These should be specified in order of preference */
static const CoglBlitMode
_cogl_blit_modes[] =
{
{
"texture-render",
_cogl_blit_texture_render_begin,
_cogl_blit_texture_render_blit,
_cogl_blit_texture_render_end
},
{
"framebuffer",
_cogl_blit_framebuffer_begin,
_cogl_blit_framebuffer_blit,
_cogl_blit_framebuffer_end
},
{
"copy-tex-sub-image",
_cogl_blit_copy_tex_sub_image_begin,
_cogl_blit_copy_tex_sub_image_blit,
_cogl_blit_copy_tex_sub_image_end
},
{
"get-tex-data",
_cogl_blit_get_tex_data_begin,
_cogl_blit_get_tex_data_blit,
_cogl_blit_get_tex_data_end
}
};
void
_cogl_blit_begin (CoglBlitData *data,
Removes all remaining use of CoglHandle Removing CoglHandle has been an on going goal for quite a long time now and finally this patch removes the last remaining uses of the CoglHandle type and the cogl_handle_ apis. Since the big remaining users of CoglHandle were the cogl_program_ and cogl_shader_ apis which have replaced with the CoglSnippets api this patch removes both of these apis. Reviewed-by: Neil Roberts <neil@linux.intel.com> (cherry picked from commit 6ed3aaf4be21d605a1ed3176b3ea825933f85cf0) Since the original patch was done after removing deprecated API this back ported patch doesn't affect deprecated API and so actually this cherry-pick doesn't remove all remaining use of CoglHandle as it did for the master branch of Cogl.
2012-04-16 13:14:10 +00:00
CoglTexture *dst_tex,
CoglTexture *src_tex)
cogl-atlas: Try 4 different approaches for migrating textures Instead of directly banging GL to migrate textures the atlas now uses the CoglFramebuffer API. It will use one of four approaches; it can set up two FBOs and use _cogl_blit_framebuffer to copy between them; it can use a single target fbo and then render the source texture to the FBO using a Cogl draw call; it can use a single FBO and call glCopyTexSubImage2D; or it can fallback to reading all of the texture data back to system memory and uploading it again with a sub texture update. Previously GL calls were used directly because Cogl wasn't able to create a framebuffer without a stencil and depth buffer. However there is now an internal version of cogl_offscreen_new_to_texture which takes a set of flags to disable the two buffers. The code for blitting has now been moved into a separate file called cogl-blit.c because it has become quite long and it may be useful outside of the atlas at some point. The 4 different methods have a fixed order of preference which is: * Texture render between two FBOs * glBlitFramebuffer * glCopyTexSubImage2D * glGetTexImage + glTexSubImage2D Once a method is succesfully used it is tried first for all subsequent blits. The default default can be overridden by setting the environment variable COGL_ATLAS_DEFAULT_BLIT_MODE to one of the following values: * texture-render * framebuffer * copy-tex-sub-image * get-tex-data
2011-01-20 17:45:47 +00:00
{
int i;
if (_cogl_blit_default_mode == NULL)
{
const char *default_mode_string;
/* Allow the default to be specified with an environment
variable. For the time being these functions are only used
when blitting between atlas textures so the environment
variable is named to be specific to the atlas code. If we
want to use the code in other places we should create another
environment variable for each specific use case */
if ((default_mode_string = g_getenv ("COGL_ATLAS_DEFAULT_BLIT_MODE")))
{
for (i = 0; i < G_N_ELEMENTS (_cogl_blit_modes); i++)
if (!strcmp (_cogl_blit_modes[i].name, default_mode_string))
{
_cogl_blit_default_mode = _cogl_blit_modes + i;
break;
}
if (i >= G_N_ELEMENTS (_cogl_blit_modes))
{
g_warning ("Unknown blit mode %s", default_mode_string);
_cogl_blit_default_mode = _cogl_blit_modes;
}
}
else
/* Default to the first blit mode */
_cogl_blit_default_mode = _cogl_blit_modes;
}
data->dst_tex = dst_tex;
data->src_tex = src_tex;
data->src_width = cogl_texture_get_width (src_tex);
data->src_height = cogl_texture_get_height (src_tex);
/* Try the default blit mode first */
if (!_cogl_blit_default_mode->begin_func (data))
{
COGL_NOTE (ATLAS, "Failed to set up blit mode %s",
_cogl_blit_default_mode->name);
/* Try all of the other modes in order */
for (i = 0; i < G_N_ELEMENTS (_cogl_blit_modes); i++)
if (_cogl_blit_modes + i != _cogl_blit_default_mode &&
_cogl_blit_modes[i].begin_func (data))
{
/* Use this mode as the default from now on */
_cogl_blit_default_mode = _cogl_blit_modes + i;
break;
}
else
COGL_NOTE (ATLAS,
"Failed to set up blit mode %s",
_cogl_blit_modes[i].name);
/* The last blit mode can't fail so this should never happen */
Start to reduce dependence on glib Since we've had several developers from admirable projects say they would like to use Cogl but would really prefer not to pull in gobject,gmodule and glib as extra dependencies we are investigating if we can get to the point where glib is only an optional dependency. Actually we feel like we only make minimal use of glib anyway, so it may well be quite straightforward to achieve this. This adds a --disable-glib configure option that can be used to disable features that depend on glib. Actually --disable-glib doesn't strictly disable glib at this point because it's more helpful if cogl continues to build as we make incremental progress towards this. The first use of glib that this patch tackles is the use of g_return_val_if_fail and g_return_if_fail which have been replaced with equivalent _COGL_RETURN_VAL_IF_FAIL and _COGL_RETURN_IF_FAIL macros. Reviewed-by: Neil Roberts <neil@linux.intel.com>
2011-10-13 21:34:30 +00:00
_COGL_RETURN_IF_FAIL (i < G_N_ELEMENTS (_cogl_blit_modes));
cogl-atlas: Try 4 different approaches for migrating textures Instead of directly banging GL to migrate textures the atlas now uses the CoglFramebuffer API. It will use one of four approaches; it can set up two FBOs and use _cogl_blit_framebuffer to copy between them; it can use a single target fbo and then render the source texture to the FBO using a Cogl draw call; it can use a single FBO and call glCopyTexSubImage2D; or it can fallback to reading all of the texture data back to system memory and uploading it again with a sub texture update. Previously GL calls were used directly because Cogl wasn't able to create a framebuffer without a stencil and depth buffer. However there is now an internal version of cogl_offscreen_new_to_texture which takes a set of flags to disable the two buffers. The code for blitting has now been moved into a separate file called cogl-blit.c because it has become quite long and it may be useful outside of the atlas at some point. The 4 different methods have a fixed order of preference which is: * Texture render between two FBOs * glBlitFramebuffer * glCopyTexSubImage2D * glGetTexImage + glTexSubImage2D Once a method is succesfully used it is tried first for all subsequent blits. The default default can be overridden by setting the environment variable COGL_ATLAS_DEFAULT_BLIT_MODE to one of the following values: * texture-render * framebuffer * copy-tex-sub-image * get-tex-data
2011-01-20 17:45:47 +00:00
}
data->blit_mode = _cogl_blit_default_mode;
COGL_NOTE (ATLAS, "Setup blit using %s", _cogl_blit_default_mode->name);
}
void
_cogl_blit (CoglBlitData *data,
unsigned int src_x,
unsigned int src_y,
unsigned int dst_x,
unsigned int dst_y,
unsigned int width,
unsigned int height)
{
data->blit_mode->blit_func (data, src_x, src_y, dst_x, dst_y, width, height);
}
void
_cogl_blit_end (CoglBlitData *data)
{
data->blit_mode->end_func (data);
}
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