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 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 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 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 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
