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 "brw_pixel.h"
36
37 #define FILE_DEBUG_FLAG DEBUG_PIXEL
38
39 static GLenum
effective_func(GLenum func,bool src_alpha_is_one)40 effective_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 */
56 bool
brw_check_blit_fragment_ops(struct gl_context * ctx,bool src_alpha_is_one)57 brw_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
126 void
brw_init_pixel_functions(struct dd_function_table * functions)127 brw_init_pixel_functions(struct dd_function_table *functions)
128 {
129 functions->Bitmap = brw_bitmap;
130 functions->CopyPixels = brw_copypixels;
131 functions->DrawPixels = brw_drawpixels;
132 functions->ReadPixels = brw_readpixels;
133 }
134