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/bufferobj.h"
30#include "main/context.h"
31#include "swrast/swrast.h"
32
33#include "brw_context.h"
34#include "intel_pixel.h"
35
36#define FILE_DEBUG_FLAG DEBUG_PIXEL
37
38static GLenum
39effective_func(GLenum func, bool src_alpha_is_one)
40{
41   if (src_alpha_is_one) {
42      if (func == GL_SRC_ALPHA)
43	 return GL_ONE;
44      if (func == GL_ONE_MINUS_SRC_ALPHA)
45	 return GL_ZERO;
46   }
47
48   return func;
49}
50
51/**
52 * Check if any fragment operations are in effect which might effect
53 * glDraw/CopyPixels.
54 */
55bool
56intel_check_blit_fragment_ops(struct gl_context * ctx, bool src_alpha_is_one)
57{
58   if (ctx->NewState)
59      _mesa_update_state(ctx);
60
61   if (ctx->FragmentProgram._Enabled) {
62      DBG("fallback due to fragment program\n");
63      return false;
64   }
65
66   if (ctx->Color.BlendEnabled &&
67       (effective_func(ctx->Color.Blend[0].SrcRGB, src_alpha_is_one) != GL_ONE ||
68	effective_func(ctx->Color.Blend[0].DstRGB, src_alpha_is_one) != GL_ZERO ||
69	ctx->Color.Blend[0].EquationRGB != GL_FUNC_ADD ||
70	effective_func(ctx->Color.Blend[0].SrcA, src_alpha_is_one) != GL_ONE ||
71	effective_func(ctx->Color.Blend[0].DstA, src_alpha_is_one) != GL_ZERO ||
72	ctx->Color.Blend[0].EquationA != GL_FUNC_ADD)) {
73      DBG("fallback due to blend\n");
74      return false;
75   }
76
77   if (ctx->Texture._MaxEnabledTexImageUnit != -1) {
78      DBG("fallback due to texturing\n");
79      return false;
80   }
81
82   if (!(ctx->Color.ColorMask[0][0] &&
83	 ctx->Color.ColorMask[0][1] &&
84	 ctx->Color.ColorMask[0][2] &&
85	 ctx->Color.ColorMask[0][3])) {
86      DBG("fallback due to color masking\n");
87      return false;
88   }
89
90   if (ctx->Color.AlphaEnabled) {
91      DBG("fallback due to alpha\n");
92      return false;
93   }
94
95   if (ctx->Depth.Test) {
96      DBG("fallback due to depth test\n");
97      return false;
98   }
99
100   if (ctx->Fog.Enabled) {
101      DBG("fallback due to fog\n");
102      return false;
103   }
104
105   if (ctx->_ImageTransferState) {
106      DBG("fallback due to image transfer\n");
107      return false;
108   }
109
110   if (ctx->Stencil._Enabled) {
111      DBG("fallback due to image stencil\n");
112      return false;
113   }
114
115   if (ctx->Pixel.ZoomX != 1.0F || ctx->Pixel.ZoomY != 1.0F) {
116      DBG("fallback due to pixel zoom\n");
117      return false;
118   }
119
120   if (ctx->RenderMode != GL_RENDER) {
121      DBG("fallback due to render mode\n");
122      return false;
123   }
124
125   return true;
126}
127
128void
129intelInitPixelFuncs(struct dd_function_table *functions)
130{
131   functions->Bitmap = intelBitmap;
132   functions->CopyPixels = intelCopyPixels;
133   functions->DrawPixels = intelDrawPixels;
134   functions->ReadPixels = intelReadPixels;
135}
136
137