ec03357e88
This adds a buffer method to map a subregion of the buffer. This works using the GL_ARB_map_buffer_range extension. If the extension is not available then it will fallback to using glMapBuffer to map the entire buffer and then just add the offset to the returned pointer. cogl_buffer_map() is now just a wrapper which maps the entire range of the buffer. The driver backend functions have been renamed to map_range and they now all take the offset and size arguments. When the COGL_BUFFER_MAP_HINT_DISCARD hint is used and the map range extension is available instead of using glBufferData to invalidate the buffer it will instead pass the new GL_MAP_HINT_INVALIDATE_BUFFER flag. There is now additionally a COGL_BUFFER_MAP_HINT_DISCARD_REGION hint which can be used if the application only wants to discard the small region that is mapped. glMapBufferRange is always used if it is available even if the entire buffer is being mapped because it seems more robust to pass those flags then to call glBufferData. Reviewed-by: Robert Bragg <robert@linux.intel.com> (cherry picked from commit 55ca02b5ca9cafc750251ec974e0d6a536cb80b8)
300 lines
11 KiB
C
300 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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COGL_EXT_BEGIN (map_region, 3, 0,
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0, /* not in either GLES */
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"ARB\0",
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"map_buffer_range\0")
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COGL_EXT_FUNCTION (GLvoid *, glMapBufferRange,
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(GLenum target,
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GLintptr offset,
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GLsizeiptr length,
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GLbitfield access))
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COGL_EXT_END ()
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