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/**************************************************************************
*
* Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sub license, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial portions
* of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
* IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
**************************************************************************/
/**
* glGet functions
*
* \author Brian Paul
*/
#include "main/imports.h"
#include "main/context.h"
#include "pipe/p_defines.h"
#include "st_cb_fbo.h"
#include "st_cb_get.h"
/**
* Examine the current color read buffer format to determine
* which GL pixel format/type combo is the best match.
*/
static void
get_preferred_read_format_type(GLcontext *ctx, GLint *format, GLint *type)
{
struct gl_framebuffer *fb = ctx->ReadBuffer;
struct st_renderbuffer *strb = st_renderbuffer(fb->_ColorReadBuffer);
/* defaults */
*format = ctx->Const.ColorReadFormat;
*type = ctx->Const.ColorReadType;
if (strb) {
/* XXX could add more cases here... */
if (strb->format == PIPE_FORMAT_A8R8G8B8_UNORM) {
*format = GL_BGRA;
if (_mesa_little_endian())
*type = GL_UNSIGNED_INT_8_8_8_8_REV;
else
*type = GL_UNSIGNED_INT_8_8_8_8;
}
}
}
/**
* We only intercept the OES preferred ReadPixels format/type.
* Everything else goes to the default _mesa_GetIntegerv.
*/
static GLboolean
st_GetIntegerv(GLcontext *ctx, GLenum pname, GLint *params)
{
GLint dummy;
switch (pname) {
case GL_IMPLEMENTATION_COLOR_READ_TYPE_OES:
get_preferred_read_format_type(ctx, &dummy, params);
return GL_TRUE;
case GL_IMPLEMENTATION_COLOR_READ_FORMAT_OES:
get_preferred_read_format_type(ctx, params, &dummy);
return GL_TRUE;
default:
return GL_FALSE;
}
}
void st_init_get_functions(struct dd_function_table *functions)
{
functions->GetIntegerv = st_GetIntegerv;
}
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