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/*
* Copyright 2006 VMware, Inc.
* 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, sublicense, 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 NONINFRINGEMENT.
* IN NO EVENT SHALL VMWARE 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 "main/accum.h"
#include "main/enums.h"
#include "main/state.h"
#include "main/stencil.h"
#include "main/bufferobj.h"
#include "main/context.h"
#include "swrast/swrast.h"
#include "brw_context.h"
#include "intel_pixel.h"
#define FILE_DEBUG_FLAG DEBUG_PIXEL
static GLenum
effective_func(GLenum func, bool src_alpha_is_one)
{
if (src_alpha_is_one) {
if (func == GL_SRC_ALPHA)
return GL_ONE;
if (func == GL_ONE_MINUS_SRC_ALPHA)
return GL_ZERO;
}
return func;
}
/**
* Check if any fragment operations are in effect which might effect
* glDraw/CopyPixels.
*/
bool
intel_check_blit_fragment_ops(struct gl_context * ctx, bool src_alpha_is_one)
{
if (ctx->NewState)
_mesa_update_state(ctx);
if (_mesa_arb_fragment_program_enabled(ctx)) {
DBG("fallback due to fragment program\n");
return false;
}
if (ctx->Color.BlendEnabled &&
(effective_func(ctx->Color.Blend[0].SrcRGB, src_alpha_is_one) != GL_ONE ||
effective_func(ctx->Color.Blend[0].DstRGB, src_alpha_is_one) != GL_ZERO ||
ctx->Color.Blend[0].EquationRGB != GL_FUNC_ADD ||
effective_func(ctx->Color.Blend[0].SrcA, src_alpha_is_one) != GL_ONE ||
effective_func(ctx->Color.Blend[0].DstA, src_alpha_is_one) != GL_ZERO ||
ctx->Color.Blend[0].EquationA != GL_FUNC_ADD)) {
DBG("fallback due to blend\n");
return false;
}
if (ctx->Texture._MaxEnabledTexImageUnit != -1) {
DBG("fallback due to texturing\n");
return false;
}
if (GET_COLORMASK(ctx->Color.ColorMask, 0) != 0xf) {
DBG("fallback due to color masking\n");
return false;
}
if (ctx->Color.AlphaEnabled) {
DBG("fallback due to alpha\n");
return false;
}
if (ctx->Depth.Test) {
DBG("fallback due to depth test\n");
return false;
}
if (ctx->Fog.Enabled) {
DBG("fallback due to fog\n");
return false;
}
if (ctx->_ImageTransferState) {
DBG("fallback due to image transfer\n");
return false;
}
if (_mesa_stencil_is_enabled(ctx)) {
DBG("fallback due to image stencil\n");
return false;
}
if (ctx->Pixel.ZoomX != 1.0F || ctx->Pixel.ZoomY != 1.0F) {
DBG("fallback due to pixel zoom\n");
return false;
}
if (ctx->RenderMode != GL_RENDER) {
DBG("fallback due to render mode\n");
return false;
}
return true;
}
void
intelInitPixelFuncs(struct dd_function_table *functions)
{
functions->Bitmap = intelBitmap;
functions->CopyPixels = intelCopyPixels;
functions->DrawPixels = intelDrawPixels;
functions->ReadPixels = intelReadPixels;
}
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