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)
289 lines
11 KiB
C
289 lines
11 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, 2011 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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/* This is included multiple times with different definitions for
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* these macros. The macros are given the following arguments:
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*
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* COGL_EXT_BEGIN:
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*
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* @name: a unique symbol name for this feature
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*
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* @min_gl_major: the major part of the minimum GL version where these
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* functions are available in core, or 255 if it isn't available in
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* any version.
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* @min_gl_minor: the minor part of the minimum GL version where these
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* functions are available in core, or 255 if it isn't available in
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* any version.
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*
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* @gles_availability: flags to specify which versions of GLES the
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* functions are available in. Should be a combination of
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* COGL_EXT_IN_GLES and COGL_EXT_IN_GLES2.
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*
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* @extension_suffixes: A zero-separated list of suffixes in a
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* string. These are appended to the extension name to get a complete
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* extension name to try. The suffix is also appended to all of the
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* function names. The suffix can optionally include a ':' to specify
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* an alternate suffix for the function names.
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*
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* @extension_names: A list of extension names to try. If any of these
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* extensions match then it will be used.
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*/
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/* The functions in this file are part of the core GL,GLES1 and GLES2 apis */
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#include "cogl-core-functions.h"
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/* The functions in this file are core to GLES1 only but may also be
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* extensions available for GLES2 and GL */
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#include "cogl-in-gles1-core-functions.h"
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/* The functions in this file are core to GLES2 only but
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* may be extensions for GLES1 and GL */
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#include "cogl-in-gles2-core-functions.h"
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/* The functions in this file are core to GLES1 and GLES2 but not core
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* to GL but they may be extensions available for GL */
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#include "cogl-in-gles-core-functions.h"
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/* These are fixed-function APIs core to GL and GLES1 */
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#include "cogl-fixed-functions.h"
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/* These are GLSL shader APIs core to GL 2.0 and GLES2 */
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#include "cogl-glsl-functions.h"
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/* These are the core GL functions which are only available in big
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GL */
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COGL_EXT_BEGIN (only_in_big_gl,
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0, 0,
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0, /* not in GLES */
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"\0",
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"\0")
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COGL_EXT_FUNCTION (void, glGetTexLevelParameteriv,
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(GLenum target, GLint level,
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GLenum pname, GLint *params))
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COGL_EXT_FUNCTION (void, glGetTexImage,
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(GLenum target, GLint level,
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GLenum format, GLenum type,
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GLvoid *pixels))
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COGL_EXT_FUNCTION (void, glClipPlane,
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(GLenum plane, const double *equation))
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COGL_EXT_FUNCTION (void, glDepthRange,
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(double near_val, double far_val))
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COGL_EXT_FUNCTION (void, glDrawBuffer,
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(GLenum mode))
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COGL_EXT_END ()
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/* GLES doesn't support mapping buffers in core so this has to be a
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separate check */
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COGL_EXT_BEGIN (map_vbos, 1, 5,
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0, /* not in GLES core */
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"ARB\0OES\0",
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"vertex_buffer_object\0mapbuffer\0")
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COGL_EXT_FUNCTION (void *, glMapBuffer,
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(GLenum target,
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GLenum access))
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COGL_EXT_FUNCTION (GLboolean, glUnmapBuffer,
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(GLenum target))
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COGL_EXT_END ()
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COGL_EXT_BEGIN (texture_3d, 1, 2,
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0, /* not in either GLES */
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"OES\0",
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"texture_3D\0")
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COGL_EXT_FUNCTION (void, glTexImage3D,
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(GLenum target, GLint level,
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GLint internalFormat,
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GLsizei width, GLsizei height,
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GLsizei depth, GLint border,
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GLenum format, GLenum type,
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const GLvoid *pixels))
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COGL_EXT_FUNCTION (void, glTexSubImage3D,
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(GLenum target, GLint level,
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GLint xoffset, GLint yoffset,
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GLint zoffset, GLsizei width,
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GLsizei height, GLsizei depth,
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GLenum format,
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GLenum type, const GLvoid *pixels))
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COGL_EXT_END ()
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COGL_EXT_BEGIN (offscreen_blit, 3, 0,
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0, /* not in either GLES */
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"EXT\0ANGLE\0",
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"framebuffer_blit\0")
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COGL_EXT_FUNCTION (void, glBlitFramebuffer,
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(GLint srcX0,
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GLint srcY0,
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GLint srcX1,
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GLint srcY1,
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GLint dstX0,
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GLint dstY0,
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GLint dstX1,
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GLint dstY1,
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GLbitfield mask,
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GLenum filter))
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COGL_EXT_END ()
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/* ARB_fragment_program */
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COGL_EXT_BEGIN (arbfp, 255, 255,
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0, /* not in either GLES */
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"ARB\0",
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"fragment_program\0")
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COGL_EXT_FUNCTION (void, glGenPrograms,
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(GLsizei n,
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GLuint *programs))
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COGL_EXT_FUNCTION (void, glDeletePrograms,
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(GLsizei n,
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GLuint *programs))
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COGL_EXT_FUNCTION (void, glBindProgram,
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(GLenum target,
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GLuint program))
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COGL_EXT_FUNCTION (void, glProgramString,
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(GLenum target,
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GLenum format,
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GLsizei len,
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const void *program))
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COGL_EXT_FUNCTION (void, glProgramLocalParameter4fv,
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(GLenum target,
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GLuint index,
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GLfloat *params))
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COGL_EXT_END ()
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COGL_EXT_BEGIN (EGL_image, 255, 255,
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0, /* not in either GLES */
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"OES\0",
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"EGL_image\0")
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COGL_EXT_FUNCTION (void, glEGLImageTargetTexture2D,
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(GLenum target,
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GLeglImageOES image))
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COGL_EXT_FUNCTION (void, glEGLImageTargetRenderbufferStorage,
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(GLenum target,
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GLeglImageOES image))
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COGL_EXT_END ()
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COGL_EXT_BEGIN (framebuffer_discard, 255, 255,
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0, /* not in either GLES */
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"EXT\0",
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"framebuffer_discard\0")
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COGL_EXT_FUNCTION (void, glDiscardFramebuffer,
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(GLenum target,
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GLsizei numAttachments,
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const GLenum *attachments))
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COGL_EXT_END ()
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COGL_EXT_BEGIN (IMG_multisampled_render_to_texture, 255, 255,
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0, /* not in either GLES */
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"\0",
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"IMG_multisampled_render_to_texture\0")
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COGL_EXT_FUNCTION (void, glRenderbufferStorageMultisampleIMG,
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(GLenum target,
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GLsizei samples,
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GLenum internal_format,
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GLsizei width,
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GLsizei height))
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COGL_EXT_FUNCTION (void, glFramebufferTexture2DMultisampleIMG,
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(GLenum target,
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GLenum attachment,
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GLenum textarget,
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GLuint texture,
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GLint level,
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GLsizei samples))
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COGL_EXT_END ()
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COGL_EXT_BEGIN (ARB_sampler_objects, 3, 3,
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0, /* not in either GLES */
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"ARB:\0",
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"sampler_objects\0")
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COGL_EXT_FUNCTION (void, glGenSamplers,
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(GLsizei count,
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GLuint *samplers))
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COGL_EXT_FUNCTION (void, glDeleteSamplers,
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(GLsizei count,
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const GLuint *samplers))
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COGL_EXT_FUNCTION (void, glBindSampler,
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(GLuint unit,
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GLuint sampler))
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COGL_EXT_FUNCTION (void, glSamplerParameteri,
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(GLuint sampler,
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GLenum pname,
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GLint param))
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COGL_EXT_END ()
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/* These only list functions that come from the old GLSL extensions.
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* Functions that are common to the extensions and GLSL 2.0 should
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* instead be listed in cogl-glsl-functions.h */
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COGL_EXT_BEGIN (shader_objects, 255, 255,
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0, /* not in either GLES */
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"ARB\0",
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"shader_objects\0")
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COGL_EXT_FUNCTION (GLuint, glCreateProgramObject,
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(void))
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COGL_EXT_FUNCTION (GLuint, glCreateShaderObject,
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(GLenum shaderType))
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COGL_EXT_FUNCTION (void, glDeleteObject,
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(GLuint obj))
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COGL_EXT_FUNCTION (void, glAttachObject,
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(GLuint container, GLuint obj))
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COGL_EXT_FUNCTION (void, glUseProgramObject,
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(GLuint programObj))
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COGL_EXT_FUNCTION (void, glGetInfoLog,
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(GLuint obj,
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GLsizei maxLength,
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GLsizei *length,
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char *infoLog))
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COGL_EXT_FUNCTION (void, glGetObjectParameteriv,
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(GLuint obj,
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GLenum pname,
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GLint *params))
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COGL_EXT_FUNCTION (void, glDetachObject,
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(GLuint container, GLuint obj))
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COGL_EXT_FUNCTION (void, glGetAttachedObjects,
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(GLuint program,
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GLsizei maxcount,
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GLsizei* count,
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GLuint* shaders))
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COGL_EXT_END ()
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COGL_EXT_BEGIN (only_gl3, 3, 0,
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0, /* not in either GLES */
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"\0",
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"\0")
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COGL_EXT_FUNCTION (const GLubyte *, glGetStringi,
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(GLenum name, GLuint index))
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COGL_EXT_END ()
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COGL_EXT_BEGIN (vertex_array_object, 3, 0,
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0, /* not in either GLES */
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"ARB\0OES\0",
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"vertex_array_object\0")
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COGL_EXT_FUNCTION (void, glBindVertexArray,
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(GLuint array))
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COGL_EXT_FUNCTION (void, glDeleteVertexArrays,
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(GLsizei n,
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const GLuint *arrays))
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COGL_EXT_FUNCTION (void, glGenVertexArrays,
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(GLsizei n,
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GLuint *arrays))
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COGL_EXT_END ()
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