2616ae0fa9
This adds a new CoglDriver for GL 3 called COGL_DRIVER_GL3. When requested, the GLX, EGL and SDL2 winsyss will set the necessary attributes to request a forward-compatible core profile 3.1 context. That means it will have no deprecated features. To simplify the explosion of checks for specific combinations of context->driver, many of these conditionals have now been replaced with private feature flags that are checked instead. The GL and GLES drivers now initialise these private feature flags depending on which driver is used. The fixed function backends now explicitly check whether the fixed function private feature is available which means the GL3 driver will fall back to always using the GLSL progend. Since Rob's latest patches the GLSL progend no longer uses any fixed function API anyway so it should just work. The driver is currently lower priority than COGL_DRIVER_GL so it will not be used unless it is specificly requested. We may want to change this priority at some point because apparently Mesa can make some memory savings if a core profile context is used. In GL 3, getting the combined extensions string with glGetString is deprecated so this patch changes it to use glGetStringi to build up an array of extensions instead. _cogl_context_get_gl_extensions now returns this array instead of trying to return a const string. The caller is expected to free the array. Some issues with this patch: • GL 3 does not support GL_ALPHA format textures. We should probably make this a feature flag or something. Cogl uses this to render text which currently just throws a GL error and breaks so it's pretty important to do something about this before considering the GL3 driver to be stable. • GL 3 doesn't support client side vertex buffers. This probably doesn't matter because CoglBuffer won't normally use malloc'd buffers if VBOs are available, but it might but worth making malloc'd buffers a private feature and forcing it not to use them. • GL 3 doesn't support the default vertex array object. This patch just makes it create and bind a single non-default vertex array object which gets used just like the normal default object. Ideally it would be good to use vertex array objects properly and attach them to a CoglPrimitive to cache the state. Reviewed-by: Robert Bragg <robert@linux.intel.com> (cherry picked from commit 66c9db993595b3a22e63f4c201ea468bc9b88cb6)
577 lines
20 KiB
C
577 lines
20 KiB
C
/*
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* Cogl
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*
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* An object oriented GL/GLES Abstraction/Utility Layer
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*
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* Copyright (C) 2009,2010,2011,2012 Intel Corporation.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*
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*
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*
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* Authors:
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* Neil Roberts <neil@linux.intel.com>
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* Robert Bragg <robert@linux.intel.com>
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <string.h>
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#include "cogl-private.h"
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#include "cogl-texture-2d-gl.h"
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#include "cogl-texture-2d-gl-private.h"
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#include "cogl-texture-2d-private.h"
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#include "cogl-pipeline-opengl-private.h"
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#include "cogl-error-private.h"
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void
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_cogl_texture_2d_gl_free (CoglTexture2D *tex_2d)
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{
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if (!tex_2d->is_foreign)
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_cogl_delete_gl_texture (tex_2d->gl_texture);
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}
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CoglBool
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_cogl_texture_2d_gl_can_create (CoglContext *ctx,
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int width,
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int height,
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CoglPixelFormat internal_format)
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{
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GLenum gl_intformat;
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GLenum gl_format;
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GLenum gl_type;
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ctx->driver_vtable->pixel_format_to_gl (ctx,
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internal_format,
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&gl_intformat,
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&gl_format,
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&gl_type);
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/* Check that the driver can create a texture with that size */
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if (!ctx->texture_driver->size_supported (ctx,
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GL_TEXTURE_2D,
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gl_intformat,
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gl_format,
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gl_type,
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width,
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height))
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return FALSE;
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return TRUE;
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}
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void
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_cogl_texture_2d_gl_init (CoglTexture2D *tex_2d)
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{
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/* We default to GL_LINEAR for both filters */
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tex_2d->gl_legacy_texobj_min_filter = GL_LINEAR;
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tex_2d->gl_legacy_texobj_mag_filter = GL_LINEAR;
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/* Wrap mode not yet set */
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tex_2d->gl_legacy_texobj_wrap_mode_s = GL_FALSE;
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tex_2d->gl_legacy_texobj_wrap_mode_t = GL_FALSE;
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}
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CoglTexture2D *
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_cogl_texture_2d_gl_new_with_size (CoglContext *ctx,
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int width,
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int height,
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CoglPixelFormat internal_format,
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CoglError **error)
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{
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CoglTexture2D *tex_2d;
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GLenum gl_intformat;
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GLenum gl_format;
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GLenum gl_type;
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internal_format = ctx->driver_vtable->pixel_format_to_gl (ctx,
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internal_format,
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&gl_intformat,
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&gl_format,
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&gl_type);
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tex_2d = _cogl_texture_2d_create_base (ctx,
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width, height,
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internal_format);
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ctx->texture_driver->gen (ctx, GL_TEXTURE_2D, 1, &tex_2d->gl_texture);
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_cogl_bind_gl_texture_transient (GL_TEXTURE_2D,
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tex_2d->gl_texture,
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tex_2d->is_foreign);
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GE( ctx, glTexImage2D (GL_TEXTURE_2D, 0, gl_intformat,
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width, height, 0, gl_format, gl_type, NULL) );
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return tex_2d;
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}
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CoglTexture2D *
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_cogl_texture_2d_gl_new_from_bitmap (CoglBitmap *bmp,
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CoglPixelFormat internal_format,
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CoglError **error)
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{
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CoglContext *ctx = _cogl_bitmap_get_context (bmp);
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CoglTexture2D *tex_2d;
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CoglBitmap *dst_bmp;
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GLenum gl_intformat;
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GLenum gl_format;
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GLenum gl_type;
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uint8_t *data;
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if ((dst_bmp = _cogl_texture_prepare_for_upload (bmp,
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internal_format,
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&internal_format,
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&gl_intformat,
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&gl_format,
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&gl_type)) == NULL)
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{
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_cogl_set_error (error, COGL_TEXTURE_ERROR,
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COGL_TEXTURE_ERROR_FORMAT,
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"Failed to prepare texture upload due to format");
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return NULL;
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}
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tex_2d = _cogl_texture_2d_create_base (ctx,
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cogl_bitmap_get_width (bmp),
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cogl_bitmap_get_height (bmp),
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internal_format);
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/* Keep a copy of the first pixel so that if glGenerateMipmap isn't
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supported we can fallback to using GL_GENERATE_MIPMAP */
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if (!cogl_has_feature (ctx, COGL_FEATURE_ID_OFFSCREEN) &&
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(data = _cogl_bitmap_map (dst_bmp,
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COGL_BUFFER_ACCESS_READ, 0)))
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{
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CoglPixelFormat format = cogl_bitmap_get_format (dst_bmp);
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tex_2d->first_pixel.gl_format = gl_format;
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tex_2d->first_pixel.gl_type = gl_type;
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memcpy (tex_2d->first_pixel.data, data,
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_cogl_pixel_format_get_bytes_per_pixel (format));
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_cogl_bitmap_unmap (dst_bmp);
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}
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ctx->texture_driver->gen (ctx, GL_TEXTURE_2D, 1, &tex_2d->gl_texture);
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ctx->texture_driver->upload_to_gl (ctx,
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GL_TEXTURE_2D,
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tex_2d->gl_texture,
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FALSE,
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dst_bmp,
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gl_intformat,
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gl_format,
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gl_type);
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tex_2d->gl_format = gl_intformat;
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cogl_object_unref (dst_bmp);
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return tex_2d;
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}
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#if defined (COGL_HAS_EGL_SUPPORT) && defined (EGL_KHR_image_base)
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CoglTexture2D *
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_cogl_egl_texture_2d_gl_new_from_image (CoglContext *ctx,
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int width,
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int height,
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CoglPixelFormat format,
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EGLImageKHR image,
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CoglError **error)
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{
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CoglTexture2D *tex_2d;
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GLenum gl_error;
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tex_2d = _cogl_texture_2d_create_base (ctx,
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width, height,
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format);
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ctx->texture_driver->gen (ctx, GL_TEXTURE_2D, 1, &tex_2d->gl_texture);
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_cogl_bind_gl_texture_transient (GL_TEXTURE_2D,
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tex_2d->gl_texture,
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FALSE);
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while ((gl_error = ctx->glGetError ()) != GL_NO_ERROR)
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;
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ctx->glEGLImageTargetTexture2D (GL_TEXTURE_2D, image);
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if (ctx->glGetError () != GL_NO_ERROR)
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{
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_cogl_set_error (error,
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COGL_TEXTURE_ERROR,
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COGL_TEXTURE_ERROR_BAD_PARAMETER,
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"Could not create a CoglTexture2D from a given "
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"EGLImage");
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return NULL;
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}
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return tex_2d;
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}
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#endif
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void
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_cogl_texture_2d_gl_flush_legacy_texobj_filters (CoglTexture *tex,
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GLenum min_filter,
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GLenum mag_filter)
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{
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CoglTexture2D *tex_2d = COGL_TEXTURE_2D (tex);
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CoglContext *ctx = tex->context;
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if (min_filter == tex_2d->gl_legacy_texobj_min_filter
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&& mag_filter == tex_2d->gl_legacy_texobj_mag_filter)
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return;
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/* Store new values */
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tex_2d->gl_legacy_texobj_min_filter = min_filter;
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tex_2d->gl_legacy_texobj_mag_filter = mag_filter;
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/* Apply new filters to the texture */
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_cogl_bind_gl_texture_transient (GL_TEXTURE_2D,
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tex_2d->gl_texture,
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tex_2d->is_foreign);
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GE( ctx, glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, mag_filter) );
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GE( ctx, glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, min_filter) );
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}
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void
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_cogl_texture_2d_gl_flush_legacy_texobj_wrap_modes (CoglTexture *tex,
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GLenum wrap_mode_s,
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GLenum wrap_mode_t,
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GLenum wrap_mode_p)
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{
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CoglTexture2D *tex_2d = COGL_TEXTURE_2D (tex);
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CoglContext *ctx = tex->context;
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/* Only set the wrap mode if it's different from the current value
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to avoid too many GL calls. Texture 2D doesn't make use of the r
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coordinate so we can ignore its wrap mode */
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if (tex_2d->gl_legacy_texobj_wrap_mode_s != wrap_mode_s ||
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tex_2d->gl_legacy_texobj_wrap_mode_t != wrap_mode_t)
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{
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_cogl_bind_gl_texture_transient (GL_TEXTURE_2D,
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tex_2d->gl_texture,
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tex_2d->is_foreign);
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GE( ctx, glTexParameteri (GL_TEXTURE_2D,
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GL_TEXTURE_WRAP_S,
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wrap_mode_s) );
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GE( ctx, glTexParameteri (GL_TEXTURE_2D,
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GL_TEXTURE_WRAP_T,
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wrap_mode_t) );
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tex_2d->gl_legacy_texobj_wrap_mode_s = wrap_mode_s;
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tex_2d->gl_legacy_texobj_wrap_mode_t = wrap_mode_t;
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}
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}
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CoglTexture2D *
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cogl_texture_2d_new_from_foreign (CoglContext *ctx,
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unsigned int gl_handle,
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int width,
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int height,
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CoglPixelFormat format,
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CoglError **error)
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{
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/* NOTE: width, height and internal format are not queriable
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* in GLES, hence such a function prototype.
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*/
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GLenum gl_error = 0;
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GLint gl_compressed = GL_FALSE;
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GLenum gl_int_format = 0;
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CoglTexture2D *tex_2d;
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/* Assert it is a valid GL texture object */
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g_return_val_if_fail (ctx->glIsTexture (gl_handle), NULL);
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if (!ctx->texture_driver->allows_foreign_gl_target (ctx, GL_TEXTURE_2D))
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{
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_cogl_set_error (error,
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COGL_SYSTEM_ERROR,
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COGL_SYSTEM_ERROR_UNSUPPORTED,
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"Foreign GL_TEXTURE_2D textures are not "
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"supported by your system");
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return NULL;
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}
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/* Make sure binding succeeds */
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while ((gl_error = ctx->glGetError ()) != GL_NO_ERROR)
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;
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_cogl_bind_gl_texture_transient (GL_TEXTURE_2D, gl_handle, TRUE);
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if (ctx->glGetError () != GL_NO_ERROR)
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{
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_cogl_set_error (error,
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COGL_SYSTEM_ERROR,
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COGL_SYSTEM_ERROR_UNSUPPORTED,
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"Failed to bind foreign GL_TEXTURE_2D texture");
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return NULL;
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}
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/* Obtain texture parameters
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(only level 0 we are interested in) */
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#if HAVE_COGL_GL
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if ((ctx->private_feature_flags &
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COGL_PRIVATE_FEATURE_QUERY_TEXTURE_PARAMETERS))
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{
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GE( ctx, glGetTexLevelParameteriv (GL_TEXTURE_2D, 0,
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GL_TEXTURE_COMPRESSED,
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&gl_compressed) );
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{
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GLint val;
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GE( ctx, glGetTexLevelParameteriv (GL_TEXTURE_2D, 0,
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GL_TEXTURE_INTERNAL_FORMAT,
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&val) );
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gl_int_format = val;
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}
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/* If we can query GL for the actual pixel format then we'll ignore
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the passed in format and use that. */
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if (!ctx->driver_vtable->pixel_format_from_gl_internal (ctx,
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gl_int_format,
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&format))
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{
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_cogl_set_error (error,
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COGL_SYSTEM_ERROR,
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COGL_SYSTEM_ERROR_UNSUPPORTED,
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"Unsupported internal format for foreign texture");
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return NULL;
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}
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}
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else
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#endif
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{
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/* Otherwise we'll assume we can derive the GL format from the
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passed in format */
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ctx->driver_vtable->pixel_format_to_gl (ctx,
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format,
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&gl_int_format,
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NULL,
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NULL);
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}
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/* Note: We always trust the given width and height without querying
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* the texture object because the user may be creating a Cogl
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* texture for a texture_from_pixmap object where glTexImage2D may
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* not have been called and the texture_from_pixmap spec doesn't
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* clarify that it is reliable to query back the size from OpenGL.
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*/
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/* Validate width and height */
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g_return_val_if_fail (width > 0 && height > 0, NULL);
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/* Compressed texture images not supported */
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if (gl_compressed == GL_TRUE)
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{
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_cogl_set_error (error,
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COGL_SYSTEM_ERROR,
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COGL_SYSTEM_ERROR_UNSUPPORTED,
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"Compressed foreign textures aren't currently supported");
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return NULL;
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}
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/* Note: previously this code would query the texture object for
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whether it has GL_GENERATE_MIPMAP enabled to determine whether to
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auto-generate the mipmap. This doesn't make much sense any more
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since Cogl switch to using glGenerateMipmap. Ideally I think
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cogl_texture_2d_new_from_foreign should take a flags parameter so
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that the application can decide whether it wants
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auto-mipmapping. To be compatible with existing code, Cogl now
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disables its own auto-mipmapping but leaves the value of
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GL_GENERATE_MIPMAP alone so that it would still work but without
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the dirtiness tracking that Cogl would do. */
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/* Create new texture */
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tex_2d = _cogl_texture_2d_create_base (ctx,
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width, height,
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format);
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_cogl_texture_2d_set_auto_mipmap (COGL_TEXTURE (tex_2d), FALSE);
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/* Setup bitmap info */
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tex_2d->is_foreign = TRUE;
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tex_2d->mipmaps_dirty = TRUE;
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tex_2d->format = format;
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tex_2d->gl_texture = gl_handle;
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tex_2d->gl_format = gl_int_format;
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/* Unknown filter */
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tex_2d->gl_legacy_texobj_min_filter = GL_FALSE;
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tex_2d->gl_legacy_texobj_mag_filter = GL_FALSE;
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return tex_2d;
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}
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void
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_cogl_texture_2d_gl_copy_from_framebuffer (CoglTexture2D *tex_2d,
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CoglFramebuffer *src_fb,
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int dst_x,
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int dst_y,
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int src_x,
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int src_y,
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int width,
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int height)
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{
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CoglContext *ctx = COGL_TEXTURE (tex_2d)->context;
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/* Make sure the current framebuffers are bound, though we don't need to
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* flush the clip state here since we aren't going to draw to the
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* framebuffer. */
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_cogl_framebuffer_flush_state (cogl_get_draw_framebuffer (),
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src_fb,
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COGL_FRAMEBUFFER_STATE_ALL &
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~COGL_FRAMEBUFFER_STATE_CLIP);
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_cogl_bind_gl_texture_transient (GL_TEXTURE_2D,
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tex_2d->gl_texture,
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tex_2d->is_foreign);
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ctx->glCopyTexSubImage2D (GL_TEXTURE_2D,
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0, /* level */
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dst_x, dst_y,
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src_x, src_y,
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width, height);
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}
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unsigned int
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_cogl_texture_2d_gl_get_gl_handle (CoglTexture2D *tex_2d)
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{
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return tex_2d->gl_texture;
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}
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void
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_cogl_texture_2d_gl_generate_mipmap (CoglTexture2D *tex_2d)
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{
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CoglContext *ctx = COGL_TEXTURE (tex_2d)->context;
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_cogl_bind_gl_texture_transient (GL_TEXTURE_2D,
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tex_2d->gl_texture,
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tex_2d->is_foreign);
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/* glGenerateMipmap is defined in the FBO extension. If it's not
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available we'll fallback to temporarily enabling
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GL_GENERATE_MIPMAP and reuploading the first pixel */
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if (cogl_has_feature (ctx, COGL_FEATURE_ID_OFFSCREEN))
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ctx->texture_driver->gl_generate_mipmaps (ctx, GL_TEXTURE_2D);
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#if defined(HAVE_COGL_GLES) || defined(HAVE_COGL_GL)
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else
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{
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GE( ctx, glTexParameteri (GL_TEXTURE_2D,
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GL_GENERATE_MIPMAP,
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GL_TRUE) );
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GE( ctx, glTexSubImage2D (GL_TEXTURE_2D, 0, 0, 0, 1, 1,
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tex_2d->first_pixel.gl_format,
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tex_2d->first_pixel.gl_type,
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tex_2d->first_pixel.data) );
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GE( ctx, glTexParameteri (GL_TEXTURE_2D,
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GL_GENERATE_MIPMAP,
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GL_FALSE) );
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}
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#endif
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}
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void
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_cogl_texture_2d_gl_copy_from_bitmap (CoglTexture2D *tex_2d,
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CoglBitmap *bmp,
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int dst_x,
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int dst_y,
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int src_x,
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int src_y,
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int width,
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int height)
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{
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CoglTexture *tex = COGL_TEXTURE (tex_2d);
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CoglContext *ctx = tex->context;
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GLenum gl_format;
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GLenum gl_type;
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uint8_t *data;
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bmp = _cogl_texture_prepare_for_upload (bmp,
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cogl_texture_get_format (tex),
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NULL,
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NULL,
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&gl_format,
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&gl_type);
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/* If this touches the first pixel then we'll update our copy */
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if (dst_x == 0 && dst_y == 0 &&
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!cogl_has_feature (ctx, COGL_FEATURE_ID_OFFSCREEN) &&
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(data = _cogl_bitmap_map (bmp, COGL_BUFFER_ACCESS_READ, 0)))
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{
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CoglPixelFormat bpp =
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_cogl_pixel_format_get_bytes_per_pixel (cogl_bitmap_get_format (bmp));
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tex_2d->first_pixel.gl_format = gl_format;
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tex_2d->first_pixel.gl_type = gl_type;
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memcpy (tex_2d->first_pixel.data,
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data + cogl_bitmap_get_rowstride (bmp) * src_y + bpp * src_x,
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bpp);
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_cogl_bitmap_unmap (bmp);
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}
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/* Send data to GL */
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ctx->texture_driver->upload_subregion_to_gl (ctx,
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GL_TEXTURE_2D,
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tex_2d->gl_texture,
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FALSE,
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src_x, src_y,
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dst_x, dst_y,
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width, height,
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bmp,
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gl_format,
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gl_type);
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cogl_object_unref (bmp);
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}
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void
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_cogl_texture_2d_gl_get_data (CoglTexture2D *tex_2d,
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CoglPixelFormat format,
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int rowstride,
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uint8_t *data)
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{
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CoglContext *ctx = COGL_TEXTURE (tex_2d)->context;
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int bpp;
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GLenum gl_format;
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GLenum gl_type;
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bpp = _cogl_pixel_format_get_bytes_per_pixel (format);
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ctx->driver_vtable->pixel_format_to_gl (ctx,
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format,
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NULL, /* internal format */
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&gl_format,
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&gl_type);
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ctx->texture_driver->prep_gl_for_pixels_download (ctx,
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rowstride,
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tex_2d->width,
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bpp);
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_cogl_bind_gl_texture_transient (GL_TEXTURE_2D,
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tex_2d->gl_texture,
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tex_2d->is_foreign);
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ctx->texture_driver->gl_get_tex_image (ctx,
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GL_TEXTURE_2D,
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gl_format,
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gl_type,
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data);
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}
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