1 /**************************************************************************
2 *
3 * Copyright 2006 Tungsten Graphics, Inc., Cedar Park, Texas.
4 * All Rights Reserved.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
13 *
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portionsalloc
16 * of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25 *
26 **************************************************************************/
27
28 #include "main/accum.h"
29 #include "main/enums.h"
30 #include "main/state.h"
31 #include "main/bufferobj.h"
32 #include "main/context.h"
33 #include "swrast/swrast.h"
34
35 #include "intel_context.h"
36 #include "intel_pixel.h"
37 #include "intel_regions.h"
38
39 #define FILE_DEBUG_FLAG DEBUG_PIXEL
40
41 static GLenum
effective_func(GLenum func,bool src_alpha_is_one)42 effective_func(GLenum func, bool src_alpha_is_one)
43 {
44 if (src_alpha_is_one) {
45 if (func == GL_SRC_ALPHA)
46 return GL_ONE;
47 if (func == GL_ONE_MINUS_SRC_ALPHA)
48 return GL_ZERO;
49 }
50
51 return func;
52 }
53
54 /**
55 * Check if any fragment operations are in effect which might effect
56 * glDraw/CopyPixels.
57 */
58 bool
intel_check_blit_fragment_ops(struct gl_context * ctx,bool src_alpha_is_one)59 intel_check_blit_fragment_ops(struct gl_context * ctx, bool src_alpha_is_one)
60 {
61 if (ctx->NewState)
62 _mesa_update_state(ctx);
63
64 if (ctx->FragmentProgram._Enabled) {
65 DBG("fallback due to fragment program\n");
66 return false;
67 }
68
69 if (ctx->Color.BlendEnabled &&
70 (effective_func(ctx->Color.Blend[0].SrcRGB, src_alpha_is_one) != GL_ONE ||
71 effective_func(ctx->Color.Blend[0].DstRGB, src_alpha_is_one) != GL_ZERO ||
72 ctx->Color.Blend[0].EquationRGB != GL_FUNC_ADD ||
73 effective_func(ctx->Color.Blend[0].SrcA, src_alpha_is_one) != GL_ONE ||
74 effective_func(ctx->Color.Blend[0].DstA, src_alpha_is_one) != GL_ZERO ||
75 ctx->Color.Blend[0].EquationA != GL_FUNC_ADD)) {
76 DBG("fallback due to blend\n");
77 return false;
78 }
79
80 if (ctx->Texture._EnabledUnits) {
81 DBG("fallback due to texturing\n");
82 return false;
83 }
84
85 if (!(ctx->Color.ColorMask[0][0] &&
86 ctx->Color.ColorMask[0][1] &&
87 ctx->Color.ColorMask[0][2] &&
88 ctx->Color.ColorMask[0][3])) {
89 DBG("fallback due to color masking\n");
90 return false;
91 }
92
93 if (ctx->Color.AlphaEnabled) {
94 DBG("fallback due to alpha\n");
95 return false;
96 }
97
98 if (ctx->Depth.Test) {
99 DBG("fallback due to depth test\n");
100 return false;
101 }
102
103 if (ctx->Fog.Enabled) {
104 DBG("fallback due to fog\n");
105 return false;
106 }
107
108 if (ctx->_ImageTransferState) {
109 DBG("fallback due to image transfer\n");
110 return false;
111 }
112
113 if (ctx->Stencil._Enabled) {
114 DBG("fallback due to image stencil\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
126 /* The intel_region struct doesn't really do enough to capture the
127 * format of the pixels in the region. For now this code assumes that
128 * the region is a display surface and hence is either ARGB8888 or
129 * RGB565.
130 * XXX FBO: If we'd pass in the intel_renderbuffer instead of region, we'd
131 * know the buffer's pixel format.
132 *
133 * \param format as given to glDraw/ReadPixels
134 * \param type as given to glDraw/ReadPixels
135 */
136 bool
intel_check_blit_format(struct intel_region * region,GLenum format,GLenum type)137 intel_check_blit_format(struct intel_region * region,
138 GLenum format, GLenum type)
139 {
140 if (region->cpp == 4 &&
141 (type == GL_UNSIGNED_INT_8_8_8_8_REV ||
142 type == GL_UNSIGNED_BYTE) && format == GL_BGRA) {
143 return true;
144 }
145
146 if (region->cpp == 2 &&
147 type == GL_UNSIGNED_SHORT_5_6_5_REV && format == GL_BGR) {
148 return true;
149 }
150
151 DBG("%s: bad format for blit (cpp %d, type %s format %s)\n",
152 __FUNCTION__, region->cpp,
153 _mesa_lookup_enum_by_nr(type), _mesa_lookup_enum_by_nr(format));
154
155 return false;
156 }
157
158 void
intelInitPixelFuncs(struct dd_function_table * functions)159 intelInitPixelFuncs(struct dd_function_table *functions)
160 {
161 functions->Accum = _mesa_accum;
162 functions->Bitmap = intelBitmap;
163 functions->CopyPixels = intelCopyPixels;
164 functions->DrawPixels = intelDrawPixels;
165 functions->ReadPixels = intelReadPixels;
166 }
167
168