1 /************************************************************************** 2 * 3 * Copyright 2003 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 portions 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/glheader.h" 29 #include "main/image.h" 30 #include "main/state.h" 31 #include "main/mtypes.h" 32 #include "main/condrender.h" 33 #include "main/fbobject.h" 34 #include "drivers/common/meta.h" 35 36 #include "intel_context.h" 37 #include "intel_buffers.h" 38 #include "intel_mipmap_tree.h" 39 #include "intel_regions.h" 40 #include "intel_pixel.h" 41 #include "intel_fbo.h" 42 43 #define FILE_DEBUG_FLAG DEBUG_PIXEL 44 45 /** 46 * Check if any fragment operations are in effect which might effect 47 * glCopyPixels. Differs from intel_check_blit_fragment_ops in that 48 * we allow Scissor. 49 */ 50 static bool 51 intel_check_copypixel_blit_fragment_ops(struct gl_context * ctx) 52 { 53 if (ctx->NewState) 54 _mesa_update_state(ctx); 55 56 /* Could do logicop with the blitter: 57 */ 58 return !(ctx->_ImageTransferState || 59 ctx->Color.AlphaEnabled || 60 ctx->Depth.Test || 61 ctx->Fog.Enabled || 62 ctx->Stencil._Enabled || 63 !ctx->Color.ColorMask[0][0] || 64 !ctx->Color.ColorMask[0][1] || 65 !ctx->Color.ColorMask[0][2] || 66 !ctx->Color.ColorMask[0][3] || 67 ctx->Texture._EnabledUnits || 68 ctx->FragmentProgram._Enabled || 69 ctx->Color.BlendEnabled); 70 } 71 72 73 /** 74 * CopyPixels with the blitter. Don't support zooming, pixel transfer, etc. 75 */ 76 static bool 77 do_blit_copypixels(struct gl_context * ctx, 78 GLint srcx, GLint srcy, 79 GLsizei width, GLsizei height, 80 GLint dstx, GLint dsty, GLenum type) 81 { 82 struct intel_context *intel = intel_context(ctx); 83 struct gl_framebuffer *fb = ctx->DrawBuffer; 84 struct gl_framebuffer *read_fb = ctx->ReadBuffer; 85 GLint orig_dstx; 86 GLint orig_dsty; 87 GLint orig_srcx; 88 GLint orig_srcy; 89 bool flip = false; 90 struct intel_renderbuffer *draw_irb = NULL; 91 struct intel_renderbuffer *read_irb = NULL; 92 gl_format read_format, draw_format; 93 94 /* Update draw buffer bounds */ 95 _mesa_update_state(ctx); 96 97 switch (type) { 98 case GL_COLOR: 99 if (fb->_NumColorDrawBuffers != 1) { 100 fallback_debug("glCopyPixels() fallback: MRT\n"); 101 return false; 102 } 103 104 draw_irb = intel_renderbuffer(fb->_ColorDrawBuffers[0]); 105 read_irb = intel_renderbuffer(read_fb->_ColorReadBuffer); 106 break; 107 case GL_DEPTH_STENCIL_EXT: 108 draw_irb = intel_renderbuffer(fb->Attachment[BUFFER_DEPTH].Renderbuffer); 109 read_irb = 110 intel_renderbuffer(read_fb->Attachment[BUFFER_DEPTH].Renderbuffer); 111 break; 112 case GL_DEPTH: 113 fallback_debug("glCopyPixels() fallback: GL_DEPTH\n"); 114 return false; 115 case GL_STENCIL: 116 fallback_debug("glCopyPixels() fallback: GL_STENCIL\n"); 117 return false; 118 default: 119 fallback_debug("glCopyPixels(): Unknown type\n"); 120 return false; 121 } 122 123 if (!draw_irb) { 124 fallback_debug("glCopyPixels() fallback: missing draw buffer\n"); 125 return false; 126 } 127 128 if (!read_irb) { 129 fallback_debug("glCopyPixels() fallback: missing read buffer\n"); 130 return false; 131 } 132 133 read_format = intel_rb_format(read_irb); 134 draw_format = intel_rb_format(draw_irb); 135 136 if (draw_format != read_format && 137 !(draw_format == MESA_FORMAT_XRGB8888 && 138 read_format == MESA_FORMAT_ARGB8888)) { 139 fallback_debug("glCopyPixels() fallback: mismatched formats (%s -> %s\n", 140 _mesa_get_format_name(read_format), 141 _mesa_get_format_name(draw_format)); 142 return false; 143 } 144 145 /* Copypixels can be more than a straight copy. Ensure all the 146 * extra operations are disabled: 147 */ 148 if (!intel_check_copypixel_blit_fragment_ops(ctx) || 149 ctx->Pixel.ZoomX != 1.0F || ctx->Pixel.ZoomY != 1.0F) 150 return false; 151 152 intel_prepare_render(intel); 153 154 intel_flush(&intel->ctx); 155 156 /* Clip to destination buffer. */ 157 orig_dstx = dstx; 158 orig_dsty = dsty; 159 if (!_mesa_clip_to_region(fb->_Xmin, fb->_Ymin, 160 fb->_Xmax, fb->_Ymax, 161 &dstx, &dsty, &width, &height)) 162 goto out; 163 /* Adjust src coords for our post-clipped destination origin */ 164 srcx += dstx - orig_dstx; 165 srcy += dsty - orig_dsty; 166 167 /* Clip to source buffer. */ 168 orig_srcx = srcx; 169 orig_srcy = srcy; 170 if (!_mesa_clip_to_region(0, 0, 171 read_fb->Width, read_fb->Height, 172 &srcx, &srcy, &width, &height)) 173 goto out; 174 /* Adjust dst coords for our post-clipped source origin */ 175 dstx += srcx - orig_srcx; 176 dsty += srcy - orig_srcy; 177 178 /* Flip dest Y if it's a window system framebuffer. */ 179 if (_mesa_is_winsys_fbo(fb)) { 180 /* copypixels to a window system framebuffer */ 181 dsty = fb->Height - dsty - height; 182 flip = !flip; 183 } 184 185 /* Flip source Y if it's a window system framebuffer. */ 186 if (_mesa_is_winsys_fbo(read_fb)) { 187 srcy = read_fb->Height - srcy - height; 188 flip = !flip; 189 } 190 191 srcx += read_irb->draw_x; 192 srcy += read_irb->draw_y; 193 dstx += draw_irb->draw_x; 194 dsty += draw_irb->draw_y; 195 196 if (!intel_region_copy(intel, 197 draw_irb->mt->region, 0, dstx, dsty, 198 read_irb->mt->region, 0, srcx, srcy, 199 width, height, flip, 200 ctx->Color.ColorLogicOpEnabled ? 201 ctx->Color.LogicOp : GL_COPY)) { 202 DBG("%s: blit failure\n", __FUNCTION__); 203 return false; 204 } 205 206 out: 207 intel_check_front_buffer_rendering(intel); 208 209 DBG("%s: success\n", __FUNCTION__); 210 return true; 211 } 212 213 214 void 215 intelCopyPixels(struct gl_context * ctx, 216 GLint srcx, GLint srcy, 217 GLsizei width, GLsizei height, 218 GLint destx, GLint desty, GLenum type) 219 { 220 DBG("%s\n", __FUNCTION__); 221 222 if (!_mesa_check_conditional_render(ctx)) 223 return; 224 225 if (do_blit_copypixels(ctx, srcx, srcy, width, height, destx, desty, type)) 226 return; 227 228 /* this will use swrast if needed */ 229 _mesa_meta_CopyPixels(ctx, srcx, srcy, width, height, destx, desty, type); 230 } 231
