isa/mutter
1
0
Fork 0
mirror of https://github.com/brl/mutter.git synced 2024-12-25 12:32:05 +00:00
Code Issues Packages Projects Releases Wiki Activity
eb7ef457cb
mutter/cogl/driver/gl/cogl-texture-2d-gl.c
Robert Bragg af7398788a remove internal_format and redundant error arguments 
Texture allocation is now consistently handled lazily such that the
internal format can now be controlled using
cogl_texture_set_components() and cogl_texture_set_premultiplied()
before allocating the texture with cogl_texture_allocate(). This means
that the internal_format arguments to texture constructors are now
redundant and since most of the texture constructors now can't ever fail
the error arguments are also redundant. This now means we no longer
use CoglPixelFormat in the public api for describing the internal format
of textures which had been bad solution originally due to how specific
CoglPixelFormat is which is missleading when we don't support such
explicit control over the internal format.

Reviewed-by: Neil Roberts <neil@linux.intel.com>
(cherry picked from commit 99a53c82e9ab0a1e5ee35941bf83dc334b1fbe87)

Note: there are numerous API changes for functions currently marked
as 'unstable' which we don't think are in use by anyone depending on
a stable 1.x api. Compared to the original patch though this avoids
changing the cogl_texture_rectangle_new_with_size() api which we know
is used by Mutter.
2014-01-09 15:49:47 +00:00

750 lines
26 KiB
C
Raw Blame History

/*
* Cogl
*
* An object oriented GL/GLES Abstraction/Utility Layer
*
* Copyright (C) 2009,2010,2011,2012 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, see <http://www.gnu.org/licenses/>.
*
*
*
* Authors:
* Neil Roberts <neil@linux.intel.com>
* Robert Bragg <robert@linux.intel.com>
*/
#include <config.h>
#include <string.h>
#include "cogl-private.h"
#include "cogl-texture-private.h"
#include "cogl-texture-2d-gl.h"
#include "cogl-texture-2d-gl-private.h"
#include "cogl-texture-2d-private.h"
#include "cogl-texture-gl-private.h"
#include "cogl-pipeline-opengl-private.h"
#include "cogl-error-private.h"
#include "cogl-util-gl-private.h"
void
_cogl_texture_2d_gl_free (CoglTexture2D *tex_2d)
{
if (!tex_2d->is_foreign && tex_2d->gl_texture)
_cogl_delete_gl_texture (tex_2d->gl_texture);
}
CoglBool
_cogl_texture_2d_gl_can_create (CoglContext *ctx,
int width,
int height,
CoglPixelFormat internal_format)
{
GLenum gl_intformat;
GLenum gl_format;
GLenum gl_type;
/* If NPOT textures aren't supported then the size must be a power
of two */
if (!cogl_has_feature (ctx, COGL_FEATURE_ID_TEXTURE_NPOT_BASIC) &&
(!_cogl_util_is_pot (width) ||
!_cogl_util_is_pot (height)))
return FALSE;
ctx->driver_vtable->pixel_format_to_gl (ctx,
internal_format,
&gl_intformat,
&gl_format,
&gl_type);
/* Check that the driver can create a texture with that size */
if (!ctx->texture_driver->size_supported (ctx,
GL_TEXTURE_2D,
gl_intformat,
gl_format,
gl_type,
width,
height))
return FALSE;
return TRUE;
}
void
_cogl_texture_2d_gl_init (CoglTexture2D *tex_2d)
{
tex_2d->gl_texture = 0;
/* We default to GL_LINEAR for both filters */
tex_2d->gl_legacy_texobj_min_filter = GL_LINEAR;
tex_2d->gl_legacy_texobj_mag_filter = GL_LINEAR;
/* Wrap mode not yet set */
tex_2d->gl_legacy_texobj_wrap_mode_s = GL_FALSE;
tex_2d->gl_legacy_texobj_wrap_mode_t = GL_FALSE;
}
static CoglBool
allocate_with_size (CoglTexture2D *tex_2d,
CoglTextureLoader *loader,
CoglError **error)
{
CoglTexture *tex = COGL_TEXTURE (tex_2d);
CoglPixelFormat internal_format;
int width = loader->src.sized.width;
int height = loader->src.sized.height;
CoglContext *ctx = tex->context;
GLenum gl_intformat;
GLenum gl_format;
GLenum gl_type;
GLenum gl_error;
GLenum gl_texture;
internal_format =
_cogl_texture_determine_internal_format (tex, COGL_PIXEL_FORMAT_ANY);
if (!_cogl_texture_2d_gl_can_create (ctx,
width,
height,
internal_format))
{
_cogl_set_error (error, COGL_TEXTURE_ERROR,
COGL_TEXTURE_ERROR_SIZE,
"Failed to create texture 2d due to size/format"
" constraints");
return FALSE;
}
ctx->driver_vtable->pixel_format_to_gl (ctx,
internal_format,
&gl_intformat,
&gl_format,
&gl_type);
gl_texture = ctx->texture_driver->gen (ctx, GL_TEXTURE_2D, internal_format);
tex_2d->gl_internal_format = gl_intformat;
_cogl_bind_gl_texture_transient (GL_TEXTURE_2D,
gl_texture,
tex_2d->is_foreign);
/* Clear any GL errors */
while ((gl_error = ctx->glGetError ()) != GL_NO_ERROR)
;
ctx->glTexImage2D (GL_TEXTURE_2D, 0, gl_intformat,
width, height, 0, gl_format, gl_type, NULL);
if (_cogl_gl_util_catch_out_of_memory (ctx, error))
{
GE( ctx, glDeleteTextures (1, &gl_texture) );
return FALSE;
}
tex_2d->gl_texture = gl_texture;
tex_2d->gl_internal_format = gl_intformat;
tex_2d->internal_format = internal_format;
_cogl_texture_set_allocated (tex, internal_format, width, height);
return TRUE;
}
static CoglBool
allocate_from_bitmap (CoglTexture2D *tex_2d,
CoglTextureLoader *loader,
CoglError **error)
{
CoglTexture *tex = COGL_TEXTURE (tex_2d);
CoglBitmap *bmp = loader->src.bitmap.bitmap;
CoglContext *ctx = _cogl_bitmap_get_context (bmp);
CoglPixelFormat internal_format;
int width = cogl_bitmap_get_width (bmp);
int height = cogl_bitmap_get_height (bmp);
CoglBool can_convert_in_place = loader->src.bitmap.can_convert_in_place;
CoglBitmap *upload_bmp;
GLenum gl_intformat;
GLenum gl_format;
GLenum gl_type;
internal_format =
_cogl_texture_determine_internal_format (tex, cogl_bitmap_get_format (bmp));
if (!_cogl_texture_2d_gl_can_create (ctx,
width,
height,
internal_format))
{
_cogl_set_error (error, COGL_TEXTURE_ERROR,
COGL_TEXTURE_ERROR_SIZE,
"Failed to create texture 2d due to size/format"
" constraints");
return FALSE;
}
upload_bmp = _cogl_bitmap_convert_for_upload (bmp,
internal_format,
can_convert_in_place,
error);
if (upload_bmp == NULL)
return FALSE;
ctx->driver_vtable->pixel_format_to_gl (ctx,
cogl_bitmap_get_format (upload_bmp),
NULL, /* internal format */
&gl_format,
&gl_type);
ctx->driver_vtable->pixel_format_to_gl (ctx,
internal_format,
&gl_intformat,
NULL,
NULL);
/* Keep a copy of the first pixel so that if glGenerateMipmap isn't
supported we can fallback to using GL_GENERATE_MIPMAP */
if (!cogl_has_feature (ctx, COGL_FEATURE_ID_OFFSCREEN))
{
CoglError *ignore = NULL;
uint8_t *data = _cogl_bitmap_map (upload_bmp,
COGL_BUFFER_ACCESS_READ, 0,
&ignore);
CoglPixelFormat format = cogl_bitmap_get_format (upload_bmp);
tex_2d->first_pixel.gl_format = gl_format;
tex_2d->first_pixel.gl_type = gl_type;
if (data)
{
memcpy (tex_2d->first_pixel.data, data,
_cogl_pixel_format_get_bytes_per_pixel (format));
_cogl_bitmap_unmap (upload_bmp);
}
else
{
g_warning ("Failed to read first pixel of bitmap for "
"glGenerateMipmap fallback");
cogl_error_free (ignore);
memset (tex_2d->first_pixel.data, 0,
_cogl_pixel_format_get_bytes_per_pixel (format));
}
}
tex_2d->gl_texture =
ctx->texture_driver->gen (ctx, GL_TEXTURE_2D, internal_format);
if (!ctx->texture_driver->upload_to_gl (ctx,
GL_TEXTURE_2D,
tex_2d->gl_texture,
FALSE,
upload_bmp,
gl_intformat,
gl_format,
gl_type,
error))
{
cogl_object_unref (upload_bmp);
return FALSE;
}
tex_2d->gl_internal_format = gl_intformat;
cogl_object_unref (upload_bmp);
tex_2d->internal_format = internal_format;
_cogl_texture_set_allocated (tex, internal_format, width, height);
return TRUE;
}
#if defined (COGL_HAS_EGL_SUPPORT) && defined (EGL_KHR_image_base)
static CoglBool
allocate_from_egl_image (CoglTexture2D *tex_2d,
CoglTextureLoader *loader,
CoglError **error)
{
CoglTexture *tex = COGL_TEXTURE (tex_2d);
CoglContext *ctx = tex->context;
CoglPixelFormat internal_format = loader->src.egl_image.format;
GLenum gl_error;
tex_2d->gl_texture =
ctx->texture_driver->gen (ctx, GL_TEXTURE_2D, internal_format);
_cogl_bind_gl_texture_transient (GL_TEXTURE_2D,
tex_2d->gl_texture,
FALSE);
while ((gl_error = ctx->glGetError ()) != GL_NO_ERROR)
;
ctx->glEGLImageTargetTexture2D (GL_TEXTURE_2D, loader->src.egl_image.image);
if (ctx->glGetError () != GL_NO_ERROR)
{
_cogl_set_error (error,
COGL_TEXTURE_ERROR,
COGL_TEXTURE_ERROR_BAD_PARAMETER,
"Could not create a CoglTexture2D from a given "
"EGLImage");
GE( ctx, glDeleteTextures (1, &tex_2d->gl_texture) );
return FALSE;
}
tex_2d->internal_format = internal_format;
_cogl_texture_set_allocated (tex,
internal_format,
loader->src.egl_image.width,
loader->src.egl_image.height);
return TRUE;
}
#endif
static CoglBool
allocate_from_gl_foreign (CoglTexture2D *tex_2d,
CoglTextureLoader *loader,
CoglError **error)
{
CoglTexture *tex = COGL_TEXTURE (tex_2d);
CoglContext *ctx = tex->context;
CoglPixelFormat format = loader->src.gl_foreign.format;
GLenum gl_error = 0;
GLint gl_compressed = GL_FALSE;
GLenum gl_int_format = 0;
if (!ctx->texture_driver->allows_foreign_gl_target (ctx, GL_TEXTURE_2D))
{
_cogl_set_error (error,
COGL_SYSTEM_ERROR,
COGL_SYSTEM_ERROR_UNSUPPORTED,
"Foreign GL_TEXTURE_2D textures are not "
"supported by your system");
return FALSE;
}
/* Make sure binding succeeds */
while ((gl_error = ctx->glGetError ()) != GL_NO_ERROR)
;
_cogl_bind_gl_texture_transient (GL_TEXTURE_2D,
loader->src.gl_foreign.gl_handle, TRUE);
if (ctx->glGetError () != GL_NO_ERROR)
{
_cogl_set_error (error,
COGL_SYSTEM_ERROR,
COGL_SYSTEM_ERROR_UNSUPPORTED,
"Failed to bind foreign GL_TEXTURE_2D texture");
return FALSE;
}
/* Obtain texture parameters
(only level 0 we are interested in) */
#ifdef HAVE_COGL_GL
if (_cogl_has_private_feature
(ctx, COGL_PRIVATE_FEATURE_QUERY_TEXTURE_PARAMETERS))
{
GE( ctx, glGetTexLevelParameteriv (GL_TEXTURE_2D, 0,
GL_TEXTURE_COMPRESSED,
&gl_compressed) );
{
GLint val;
GE( ctx, glGetTexLevelParameteriv (GL_TEXTURE_2D, 0,
GL_TEXTURE_INTERNAL_FORMAT,
&val) );
gl_int_format = val;
}
/* If we can query GL for the actual pixel format then we'll ignore
the passed in format and use that. */
if (!ctx->driver_vtable->pixel_format_from_gl_internal (ctx,
gl_int_format,
&format))
{
_cogl_set_error (error,
COGL_SYSTEM_ERROR,
COGL_SYSTEM_ERROR_UNSUPPORTED,
"Unsupported internal format for foreign texture");
return FALSE;
}
}
else
#endif
{
/* Otherwise we'll assume we can derive the GL format from the
passed in format */
ctx->driver_vtable->pixel_format_to_gl (ctx,
format,
&gl_int_format,
NULL,
NULL);
}
/* Compressed texture images not supported */
if (gl_compressed == GL_TRUE)
{
_cogl_set_error (error,
COGL_SYSTEM_ERROR,
COGL_SYSTEM_ERROR_UNSUPPORTED,
"Compressed foreign textures aren't currently supported");
return FALSE;
}
/* Note: previously this code would query the texture object for
whether it has GL_GENERATE_MIPMAP enabled to determine whether to
auto-generate the mipmap. This doesn't make much sense any more
since Cogl switch to using glGenerateMipmap. Ideally I think
cogl_texture_2d_gl_new_from_foreign should take a flags parameter so
that the application can decide whether it wants
auto-mipmapping. To be compatible with existing code, Cogl now
disables its own auto-mipmapping but leaves the value of
GL_GENERATE_MIPMAP alone so that it would still work but without
the dirtiness tracking that Cogl would do. */
_cogl_texture_2d_set_auto_mipmap (COGL_TEXTURE (tex_2d), FALSE);
/* Setup bitmap info */
tex_2d->is_foreign = TRUE;
tex_2d->mipmaps_dirty = TRUE;
tex_2d->gl_texture = loader->src.gl_foreign.gl_handle;
tex_2d->gl_internal_format = gl_int_format;
/* Unknown filter */
tex_2d->gl_legacy_texobj_min_filter = GL_FALSE;
tex_2d->gl_legacy_texobj_mag_filter = GL_FALSE;
tex_2d->internal_format = format;
_cogl_texture_set_allocated (tex,
format,
loader->src.gl_foreign.width,
loader->src.gl_foreign.height);
return TRUE;
}
CoglBool
_cogl_texture_2d_gl_allocate (CoglTexture *tex,
CoglError **error)
{
CoglTexture2D *tex_2d = COGL_TEXTURE_2D (tex);
CoglTextureLoader *loader = tex->loader;
_COGL_RETURN_VAL_IF_FAIL (loader, FALSE);
switch (loader->src_type)
{
case COGL_TEXTURE_SOURCE_TYPE_SIZED:
return allocate_with_size (tex_2d, loader, error);
case COGL_TEXTURE_SOURCE_TYPE_BITMAP:
return allocate_from_bitmap (tex_2d, loader, error);
case COGL_TEXTURE_SOURCE_TYPE_EGL_IMAGE:
#if defined (COGL_HAS_EGL_SUPPORT) && defined (EGL_KHR_image_base)
return allocate_from_egl_image (tex_2d, loader, error);
#else
g_return_val_if_reached (FALSE);
#endif
case COGL_TEXTURE_SOURCE_TYPE_GL_FOREIGN:
return allocate_from_gl_foreign (tex_2d, loader, error);
}
g_return_val_if_reached (FALSE);
}
void
_cogl_texture_2d_gl_flush_legacy_texobj_filters (CoglTexture *tex,
GLenum min_filter,
GLenum mag_filter)
{
CoglTexture2D *tex_2d = COGL_TEXTURE_2D (tex);
CoglContext *ctx = tex->context;
if (min_filter == tex_2d->gl_legacy_texobj_min_filter
&& mag_filter == tex_2d->gl_legacy_texobj_mag_filter)
return;
/* Store new values */
tex_2d->gl_legacy_texobj_min_filter = min_filter;
tex_2d->gl_legacy_texobj_mag_filter = mag_filter;
/* Apply new filters to the texture */
_cogl_bind_gl_texture_transient (GL_TEXTURE_2D,
tex_2d->gl_texture,
tex_2d->is_foreign);
GE( ctx, glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, mag_filter) );
GE( ctx, glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, min_filter) );
}
void
_cogl_texture_2d_gl_flush_legacy_texobj_wrap_modes (CoglTexture *tex,
GLenum wrap_mode_s,
GLenum wrap_mode_t,
GLenum wrap_mode_p)
{
CoglTexture2D *tex_2d = COGL_TEXTURE_2D (tex);
CoglContext *ctx = tex->context;
/* Only set the wrap mode if it's different from the current value
to avoid too many GL calls. Texture 2D doesn't make use of the r
coordinate so we can ignore its wrap mode */
if (tex_2d->gl_legacy_texobj_wrap_mode_s != wrap_mode_s ||
tex_2d->gl_legacy_texobj_wrap_mode_t != wrap_mode_t)
{
_cogl_bind_gl_texture_transient (GL_TEXTURE_2D,
tex_2d->gl_texture,
tex_2d->is_foreign);
GE( ctx, glTexParameteri (GL_TEXTURE_2D,
GL_TEXTURE_WRAP_S,
wrap_mode_s) );
GE( ctx, glTexParameteri (GL_TEXTURE_2D,
GL_TEXTURE_WRAP_T,
wrap_mode_t) );
tex_2d->gl_legacy_texobj_wrap_mode_s = wrap_mode_s;
tex_2d->gl_legacy_texobj_wrap_mode_t = wrap_mode_t;
}
}
CoglTexture2D *
cogl_texture_2d_gl_new_from_foreign (CoglContext *ctx,
unsigned int gl_handle,
int width,
int height,
CoglPixelFormat format)
{
CoglTextureLoader *loader;
/* NOTE: width, height and internal format are not queriable
* in GLES, hence such a function prototype.
*/
/* Note: We always trust the given width and height without querying
* the texture object because the user may be creating a Cogl
* texture for a texture_from_pixmap object where glTexImage2D may
* not have been called and the texture_from_pixmap spec doesn't
* clarify that it is reliable to query back the size from OpenGL.
*/
/* Assert it is a valid GL texture object */
_COGL_RETURN_VAL_IF_FAIL (ctx->glIsTexture (gl_handle), FALSE);
/* Validate width and height */
_COGL_RETURN_VAL_IF_FAIL (width > 0 && height > 0, NULL);
loader = _cogl_texture_create_loader ();
loader->src_type = COGL_TEXTURE_SOURCE_TYPE_GL_FOREIGN;
loader->src.gl_foreign.gl_handle = gl_handle;
loader->src.gl_foreign.width = width;
loader->src.gl_foreign.height = height;
loader->src.gl_foreign.format = format;
return _cogl_texture_2d_create_base (ctx, width, height, format, loader);
}
void
_cogl_texture_2d_gl_copy_from_framebuffer (CoglTexture2D *tex_2d,
int src_x,
int src_y,
int width,
int height,
CoglFramebuffer *src_fb,
int dst_x,
int dst_y,
int level)
{
CoglTexture *tex = COGL_TEXTURE (tex_2d);
CoglContext *ctx = tex->context;
/* Make sure the current framebuffers are bound, though we don't need to
* flush the clip state here since we aren't going to draw to the
* framebuffer. */
_cogl_framebuffer_flush_state (ctx->current_draw_buffer,
src_fb,
COGL_FRAMEBUFFER_STATE_ALL &
~COGL_FRAMEBUFFER_STATE_CLIP);
_cogl_bind_gl_texture_transient (GL_TEXTURE_2D,
tex_2d->gl_texture,
tex_2d->is_foreign);
ctx->glCopyTexSubImage2D (GL_TEXTURE_2D,
0, /* level */
dst_x, dst_y,
src_x, src_y,
width, height);
}
unsigned int
_cogl_texture_2d_gl_get_gl_handle (CoglTexture2D *tex_2d)
{
return tex_2d->gl_texture;
}
void
_cogl_texture_2d_gl_generate_mipmap (CoglTexture2D *tex_2d)
{
CoglContext *ctx = COGL_TEXTURE (tex_2d)->context;
/* glGenerateMipmap is defined in the FBO extension. If it's not
available we'll fallback to temporarily enabling
GL_GENERATE_MIPMAP and reuploading the first pixel */
if (cogl_has_feature (ctx, COGL_FEATURE_ID_OFFSCREEN))
_cogl_texture_gl_generate_mipmaps (COGL_TEXTURE (tex_2d));
#if defined(HAVE_COGL_GLES) || defined(HAVE_COGL_GL)
else
{
_cogl_bind_gl_texture_transient (GL_TEXTURE_2D,
tex_2d->gl_texture,
tex_2d->is_foreign);
GE( ctx, glTexParameteri (GL_TEXTURE_2D,
GL_GENERATE_MIPMAP,
GL_TRUE) );
GE( ctx, glTexSubImage2D (GL_TEXTURE_2D, 0, 0, 0, 1, 1,
tex_2d->first_pixel.gl_format,
tex_2d->first_pixel.gl_type,
tex_2d->first_pixel.data) );
GE( ctx, glTexParameteri (GL_TEXTURE_2D,
GL_GENERATE_MIPMAP,
GL_FALSE) );
}
#endif
}
CoglBool
_cogl_texture_2d_gl_copy_from_bitmap (CoglTexture2D *tex_2d,
int src_x,
int src_y,
int width,
int height,
CoglBitmap *bmp,
int dst_x,
int dst_y,
int level,
CoglError **error)
{
CoglTexture *tex = COGL_TEXTURE (tex_2d);
CoglContext *ctx = tex->context;
CoglBitmap *upload_bmp;
CoglPixelFormat upload_format;
GLenum gl_format;
GLenum gl_type;
CoglBool status = TRUE;
upload_bmp =
_cogl_bitmap_convert_for_upload (bmp,
_cogl_texture_get_format (tex),
FALSE, /* can't convert in place */
error);
if (upload_bmp == NULL)
return FALSE;
upload_format = cogl_bitmap_get_format (upload_bmp);
ctx->driver_vtable->pixel_format_to_gl (ctx,
upload_format,
NULL, /* internal format */
&gl_format,
&gl_type);
/* If this touches the first pixel then we'll update our copy */
if (dst_x == 0 && dst_y == 0 &&
!cogl_has_feature (ctx, COGL_FEATURE_ID_OFFSCREEN))
{
CoglError *ignore = NULL;
uint8_t *data =
_cogl_bitmap_map (upload_bmp, COGL_BUFFER_ACCESS_READ, 0, &ignore);
CoglPixelFormat bpp =
_cogl_pixel_format_get_bytes_per_pixel (upload_format);
tex_2d->first_pixel.gl_format = gl_format;
tex_2d->first_pixel.gl_type = gl_type;
if (data)
{
memcpy (tex_2d->first_pixel.data,
(data +
cogl_bitmap_get_rowstride (upload_bmp) * src_y +
bpp * src_x),
bpp);
_cogl_bitmap_unmap (bmp);
}
else
{
g_warning ("Failed to read first bitmap pixel for "
"glGenerateMipmap fallback");
cogl_error_free (ignore);
memset (tex_2d->first_pixel.data, 0, bpp);
}
}
status = ctx->texture_driver->upload_subregion_to_gl (ctx,
tex,
FALSE,
src_x, src_y,
dst_x, dst_y,
width, height,
level,
upload_bmp,
gl_format,
gl_type,
error);
cogl_object_unref (upload_bmp);
_cogl_texture_gl_maybe_update_max_level (tex, level);
return status;
}
void
_cogl_texture_2d_gl_get_data (CoglTexture2D *tex_2d,
CoglPixelFormat format,
int rowstride,
uint8_t *data)
{
CoglContext *ctx = COGL_TEXTURE (tex_2d)->context;
int bpp;
int width = COGL_TEXTURE (tex_2d)->width;
GLenum gl_format;
GLenum gl_type;
bpp = _cogl_pixel_format_get_bytes_per_pixel (format);
ctx->driver_vtable->pixel_format_to_gl (ctx,
format,
NULL, /* internal format */
&gl_format,
&gl_type);
ctx->texture_driver->prep_gl_for_pixels_download (ctx,
rowstride,
width,
bpp);
_cogl_bind_gl_texture_transient (GL_TEXTURE_2D,
tex_2d->gl_texture,
tex_2d->is_foreign);
ctx->texture_driver->gl_get_tex_image (ctx,
GL_TEXTURE_2D,
gl_format,
gl_type,
data);
}
Reference in New Issue View Git Blame Copy Permalink