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Move all of the GL function pointers directly to CoglContext

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Instead of storing all of the feature function pointers in the driver
specific data of the CoglContext they are now all stored directly in
CoglContext. There is a single header containing the description of
the functions which gets included by cogl-context.h. There is a single
function in cogl-feature-private.c to check for all of these
functions.

The name of the function pointer variables have been changed from
ctx->drv.pf_glWhatever to just ctx->glWhatever.

The feature flags that get set when an extension is available are now
separated from the table of extensions. This is necessary because
different extensions can mean different things on GLES and GL. For
example, having access to glMapBuffer implies read and write support
on GL but only write support on GLES. The flags are instead set in the
driver specific init function by checking whether the function
pointers were successfully resolved.

_cogl_feature_check has been changed to assume the feature is
supported if any of the listed extensions are available instead of
requiring all of them. This makes it more convenient to specify
alternate names for the extension. Nothing else had previously listed
more than one name for an extension so this shouldn't cause any
problems.
This commit is contained in:
Neil Roberts
2011-07-06 18:59:20 +01:00
parent 17a558a386
commit dae02a99a5
30 changed files with 749 additions and 857 deletions
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26
cogl/cogl-attribute.c
View File

@ -49,26 +49,26 @@
#if defined (HAVE_COGL_GL)
#define glGenBuffers ctx->drv.pf_glGenBuffers
#define glBindBuffer ctx->drv.pf_glBindBuffer
#define glBufferData ctx->drv.pf_glBufferData
#define glBufferSubData ctx->drv.pf_glBufferSubData
#define glGetBufferSubData ctx->drv.pf_glGetBufferSubData
#define glDeleteBuffers ctx->drv.pf_glDeleteBuffers
#define glMapBuffer ctx->drv.pf_glMapBuffer
#define glUnmapBuffer ctx->drv.pf_glUnmapBuffer
#define glClientActiveTexture ctx->drv.pf_glClientActiveTexture
#define glGenBuffers ctx->glGenBuffers
#define glBindBuffer ctx->glBindBuffer
#define glBufferData ctx->glBufferData
#define glBufferSubData ctx->glBufferSubData
#define glGetBufferSubData ctx->glGetBufferSubData
#define glDeleteBuffers ctx->glDeleteBuffers
#define glMapBuffer ctx->glMapBuffer
#define glUnmapBuffer ctx->glUnmapBuffer
#define glClientActiveTexture ctx->glClientActiveTexture
#ifndef GL_ARRAY_BUFFER
#define GL_ARRAY_BUFFER GL_ARRAY_BUFFER_ARB
#endif
#define glVertexAttribPointer ctx->drv.pf_glVertexAttribPointer
#define glEnableVertexAttribArray ctx->drv.pf_glEnableVertexAttribArray
#define glDisableVertexAttribArray ctx->drv.pf_glDisableVertexAttribArray
#define glVertexAttribPointer ctx->glVertexAttribPointer
#define glEnableVertexAttribArray ctx->glEnableVertexAttribArray
#define glDisableVertexAttribArray ctx->glDisableVertexAttribArray
#define MAY_HAVE_PROGRAMABLE_GL
#define glDrawRangeElements(mode, start, end, count, type, indices) \
ctx->drv.pf_glDrawRangeElements (mode, start, end, count, type, indices)
ctx->glDrawRangeElements (mode, start, end, count, type, indices)
#else /* GLES 1/2 */