1/*
2 * Copyright 2006 VMware, Inc.
3 * All Rights Reserved.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the
7 * "Software"), to deal in the Software without restriction, including
8 * without limitation the rights to use, copy, modify, merge, publish,
9 * distribute, sublicense, and/or sell copies of the Software, and to
10 * permit persons to whom the Software is furnished to do so, subject to
11 * the following conditions:
12 *
13 * The above copyright notice and this permission notice (including the
14 * next paragraph) shall be included in all copies or substantial portionsalloc
15 * of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
20 * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
21 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
22 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
23 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
24 */
25
26#include "main/accum.h"
27#include "main/enums.h"
28#include "main/state.h"
29#include "main/stencil.h"
30#include "main/bufferobj.h"
31#include "main/context.h"
32#include "swrast/swrast.h"
33
34#include "brw_context.h"
35#include "intel_pixel.h"
36
37#define FILE_DEBUG_FLAG DEBUG_PIXEL
38
39static GLenum
40effective_func(GLenum func, bool src_alpha_is_one)
41{
42   if (src_alpha_is_one) {
43      if (func == GL_SRC_ALPHA)
44	 return GL_ONE;
45      if (func == GL_ONE_MINUS_SRC_ALPHA)
46	 return GL_ZERO;
47   }
48
49   return func;
50}
51
52/**
53 * Check if any fragment operations are in effect which might effect
54 * glDraw/CopyPixels.
55 */
56bool
57intel_check_blit_fragment_ops(struct gl_context * ctx, bool src_alpha_is_one)
58{
59   if (ctx->NewState)
60      _mesa_update_state(ctx);
61
62   if (_mesa_arb_fragment_program_enabled(ctx)) {
63      DBG("fallback due to fragment program\n");
64      return false;
65   }
66
67   if (ctx->Color.BlendEnabled &&
68       (effective_func(ctx->Color.Blend[0].SrcRGB, src_alpha_is_one) != GL_ONE ||
69	effective_func(ctx->Color.Blend[0].DstRGB, src_alpha_is_one) != GL_ZERO ||
70	ctx->Color.Blend[0].EquationRGB != GL_FUNC_ADD ||
71	effective_func(ctx->Color.Blend[0].SrcA, src_alpha_is_one) != GL_ONE ||
72	effective_func(ctx->Color.Blend[0].DstA, src_alpha_is_one) != GL_ZERO ||
73	ctx->Color.Blend[0].EquationA != GL_FUNC_ADD)) {
74      DBG("fallback due to blend\n");
75      return false;
76   }
77
78   if (ctx->Texture._MaxEnabledTexImageUnit != -1) {
79      DBG("fallback due to texturing\n");
80      return false;
81   }
82
83   if (GET_COLORMASK(ctx->Color.ColorMask, 0) != 0xf) {
84      DBG("fallback due to color masking\n");
85      return false;
86   }
87
88   if (ctx->Color.AlphaEnabled) {
89      DBG("fallback due to alpha\n");
90      return false;
91   }
92
93   if (ctx->Depth.Test) {
94      DBG("fallback due to depth test\n");
95      return false;
96   }
97
98   if (ctx->Fog.Enabled) {
99      DBG("fallback due to fog\n");
100      return false;
101   }
102
103   if (ctx->_ImageTransferState) {
104      DBG("fallback due to image transfer\n");
105      return false;
106   }
107
108   if (_mesa_stencil_is_enabled(ctx)) {
109      DBG("fallback due to image stencil\n");
110      return false;
111   }
112
113   if (ctx->Pixel.ZoomX != 1.0F || ctx->Pixel.ZoomY != 1.0F) {
114      DBG("fallback due to pixel zoom\n");
115      return false;
116   }
117
118   if (ctx->RenderMode != GL_RENDER) {
119      DBG("fallback due to render mode\n");
120      return false;
121   }
122
123   return true;
124}
125
126void
127intelInitPixelFuncs(struct dd_function_table *functions)
128{
129   functions->Bitmap = intelBitmap;
130   functions->CopyPixels = intelCopyPixels;
131   functions->DrawPixels = intelDrawPixels;
132   functions->ReadPixels = intelReadPixels;
133}
134
135