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/**************************************************************************
*
* Copyright 2006 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 portionsalloc
* 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.
*
**************************************************************************/
#include "enums.h"
#include "state.h"
#include "swrast/swrast.h"
#include "intel_context.h"
#include "intel_pixel.h"
#include "intel_regions.h"
/**
* Check if any fragment operations are in effect which might effect
* glDraw/CopyPixels.
*/
GLboolean
intel_check_blit_fragment_ops(GLcontext * ctx)
{
if (ctx->NewState)
_mesa_update_state(ctx);
/* XXX Note: Scissor done with blitter:
*/
return !(ctx->_ImageTransferState ||
ctx->Color.AlphaEnabled ||
ctx->Depth.Test ||
ctx->Fog.Enabled ||
ctx->Stencil.Enabled ||
!ctx->Color.ColorMask[0] ||
!ctx->Color.ColorMask[1] ||
!ctx->Color.ColorMask[2] ||
!ctx->Color.ColorMask[3] ||
ctx->Texture._EnabledUnits ||
ctx->FragmentProgram._Enabled ||
ctx->Color.BlendEnabled);
}
GLboolean
intel_check_meta_tex_fragment_ops(GLcontext * ctx)
{
if (ctx->NewState)
_mesa_update_state(ctx);
/* Some of _ImageTransferState (scale, bias) could be done with
* fragment programs on i915.
*/
return !(ctx->_ImageTransferState || ctx->Fog.Enabled || /* not done yet */
ctx->Texture._EnabledUnits || ctx->FragmentProgram._Enabled);
}
/* The intel_region struct doesn't really do enough to capture the
* format of the pixels in the region. For now this code assumes that
* the region is a display surface and hence is either ARGB8888 or
* RGB565.
* XXX FBO: If we'd pass in the intel_renderbuffer instead of region, we'd
* know the buffer's pixel format.
*
* \param format as given to glDraw/ReadPixels
* \param type as given to glDraw/ReadPixels
*/
GLboolean
intel_check_blit_format(struct intel_region * region,
GLenum format, GLenum type)
{
if (region->cpp == 4 &&
(type == GL_UNSIGNED_INT_8_8_8_8_REV ||
type == GL_UNSIGNED_BYTE) && format == GL_BGRA) {
return GL_TRUE;
}
if (region->cpp == 2 &&
type == GL_UNSIGNED_SHORT_5_6_5_REV && format == GL_BGR) {
return GL_TRUE;
}
if (INTEL_DEBUG & DEBUG_PIXEL)
fprintf(stderr, "%s: bad format for blit (cpp %d, type %s format %s)\n",
__FUNCTION__, region->cpp,
_mesa_lookup_enum_by_nr(type), _mesa_lookup_enum_by_nr(format));
return GL_FALSE;
}
void
intelInitPixelFuncs(struct dd_function_table *functions)
{
functions->Accum = _swrast_Accum;
functions->Bitmap = _swrast_Bitmap;
functions->CopyPixels = intelCopyPixels;
functions->ReadPixels = intelReadPixels;
functions->DrawPixels = intelDrawPixels;
}
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