Brian Paul | 33a838b | 2009-08-10 13:35:58 -0600 | [diff] [blame] | 1 | /* |
| 2 | * Mesa 3-D graphics library |
| 3 | * Version: 7.6 |
| 4 | * |
| 5 | * Copyright (C) 2009 VMware, Inc. All Rights Reserved. |
| 6 | * |
| 7 | * Permission is hereby granted, free of charge, to any person obtaining a |
| 8 | * copy of this software and associated documentation files (the "Software"), |
| 9 | * to deal in the Software without restriction, including without limitation |
| 10 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| 11 | * and/or sell copies of the Software, and to permit persons to whom the |
| 12 | * Software is furnished to do so, subject to the following conditions: |
| 13 | * |
| 14 | * The above copyright notice and this permission notice shall be included |
| 15 | * in all copies or substantial portions 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 MERCHANTABILITY, |
| 19 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 20 | * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN |
| 21 | * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| 22 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
| 23 | */ |
| 24 | |
| 25 | /** |
| 26 | * Meta operations. Some GL operations can be expressed in terms of |
| 27 | * other GL operations. For example, glBlitFramebuffer() can be done |
| 28 | * with texture mapping and glClear() can be done with polygon rendering. |
| 29 | * |
| 30 | * \author Brian Paul |
| 31 | */ |
| 32 | |
| 33 | |
| 34 | #include "main/glheader.h" |
| 35 | #include "main/mtypes.h" |
| 36 | #include "main/imports.h" |
| 37 | #include "main/arrayobj.h" |
| 38 | #include "main/blend.h" |
| 39 | #include "main/bufferobj.h" |
| 40 | #include "main/depth.h" |
| 41 | #include "main/enable.h" |
| 42 | #include "main/macros.h" |
| 43 | #include "main/matrix.h" |
| 44 | #include "main/polygon.h" |
| 45 | #include "main/scissor.h" |
| 46 | #include "main/shaders.h" |
| 47 | #include "main/stencil.h" |
| 48 | #include "main/texobj.h" |
| 49 | #include "main/texenv.h" |
| 50 | #include "main/teximage.h" |
| 51 | #include "main/texparam.h" |
| 52 | #include "main/texstate.h" |
| 53 | #include "main/varray.h" |
| 54 | #include "main/viewport.h" |
| 55 | #include "shader/program.h" |
| 56 | #include "swrast/swrast.h" |
| 57 | #include "drivers/common/meta.h" |
| 58 | |
| 59 | |
| 60 | /** |
| 61 | * State which we may save/restore across meta ops. |
| 62 | * XXX this may be incomplete... |
| 63 | */ |
| 64 | struct save_state |
| 65 | { |
| 66 | GLbitfield SavedState; /**< bitmask of META_* flags */ |
| 67 | |
| 68 | /** META_ALPHA_TEST */ |
| 69 | GLboolean AlphaEnabled; |
| 70 | |
| 71 | /** META_BLEND */ |
| 72 | GLboolean BlendEnabled; |
| 73 | GLboolean ColorLogicOpEnabled; |
| 74 | |
| 75 | /** META_COLOR_MASK */ |
| 76 | GLubyte ColorMask[4]; |
| 77 | |
| 78 | /** META_DEPTH_TEST */ |
| 79 | struct gl_depthbuffer_attrib Depth; |
| 80 | |
| 81 | /** META_PIXELSTORE */ |
| 82 | /* XXX / TO-DO */ |
| 83 | |
| 84 | /** META_RASTERIZATION */ |
| 85 | GLenum FrontPolygonMode, BackPolygonMode; |
| 86 | GLboolean PolygonOffset; |
| 87 | GLboolean PolygonSmooth; |
| 88 | GLboolean PolygonStipple; |
| 89 | GLboolean PolygonCull; |
| 90 | |
| 91 | /** META_SCISSOR */ |
| 92 | struct gl_scissor_attrib Scissor; |
| 93 | |
| 94 | /** META_SHADER */ |
| 95 | GLboolean VertexProgramEnabled; |
| 96 | struct gl_vertex_program *VertexProgram; |
| 97 | GLboolean FragmentProgramEnabled; |
| 98 | struct gl_fragment_program *FragmentProgram; |
| 99 | GLuint Shader; |
| 100 | |
| 101 | /** META_STENCIL_TEST */ |
| 102 | struct gl_stencil_attrib Stencil; |
| 103 | |
| 104 | /** META_TRANSFORM */ |
| 105 | GLenum MatrixMode; |
| 106 | GLfloat ModelviewMatrix[16]; |
| 107 | GLfloat ProjectionMatrix[16]; |
Brian Paul | edb991b | 2009-08-10 15:44:05 -0600 | [diff] [blame^] | 108 | GLfloat TextureMatrix[16]; |
Brian Paul | 33a838b | 2009-08-10 13:35:58 -0600 | [diff] [blame] | 109 | GLbitfield ClipPlanesEnabled; |
| 110 | |
| 111 | /** META_TEXTURE */ |
| 112 | GLuint ActiveUnit; |
| 113 | GLuint ClientActiveUnit; |
| 114 | /** for unit[0] only */ |
| 115 | struct gl_texture_object *CurrentTexture[NUM_TEXTURE_TARGETS]; |
| 116 | /** mask of TEXTURE_2D_BIT, etc */ |
| 117 | GLbitfield TexEnabled[MAX_TEXTURE_UNITS]; |
| 118 | GLbitfield TexGenEnabled[MAX_TEXTURE_UNITS]; |
| 119 | GLuint EnvMode; /* unit[0] only */ |
| 120 | |
| 121 | /** META_VERTEX */ |
| 122 | struct gl_array_object *ArrayObj; |
| 123 | struct gl_buffer_object *ArrayBufferObj; |
| 124 | |
| 125 | /** META_VIEWPORT */ |
| 126 | GLint ViewportX, ViewportY, ViewportW, ViewportH; |
| 127 | GLclampd DepthNear, DepthFar; |
| 128 | |
| 129 | /** Miscellaneous (always disabled) */ |
| 130 | GLboolean Lighting; |
| 131 | GLboolean Fog; |
| 132 | }; |
| 133 | |
| 134 | |
| 135 | /** |
| 136 | * State for glBlitFramebufer() |
| 137 | */ |
| 138 | struct blit_state |
| 139 | { |
| 140 | GLuint TexObj; |
Brian Paul | 2ad10c9 | 2009-08-10 15:05:53 -0600 | [diff] [blame] | 141 | GLsizei TexWidth, TexHeight; |
| 142 | GLenum TexType; |
Brian Paul | 33a838b | 2009-08-10 13:35:58 -0600 | [diff] [blame] | 143 | GLuint ArrayObj; |
| 144 | GLuint VBO; |
| 145 | GLfloat verts[4][4]; /** four verts of X,Y,S,T */ |
| 146 | }; |
| 147 | |
| 148 | |
| 149 | /** |
| 150 | * State for glClear() |
| 151 | */ |
| 152 | struct clear_state |
| 153 | { |
| 154 | GLuint ArrayObj; |
| 155 | GLuint VBO; |
| 156 | GLfloat verts[4][7]; /** four verts of X,Y,Z,R,G,B,A */ |
| 157 | }; |
| 158 | |
| 159 | |
| 160 | /** |
Brian Paul | c16fa38 | 2009-08-10 14:43:15 -0600 | [diff] [blame] | 161 | * State for glCopyPixels() |
| 162 | */ |
| 163 | struct copypix_state |
| 164 | { |
| 165 | GLuint TexObj; |
| 166 | GLsizei TexWidth, TexHeight; |
| 167 | GLenum TexType; |
| 168 | GLuint ArrayObj; |
| 169 | GLuint VBO; |
| 170 | GLfloat verts[4][5]; /** four verts of X,Y,Z,S,T */ |
| 171 | }; |
| 172 | |
| 173 | |
| 174 | |
| 175 | /** |
Brian Paul | 33a838b | 2009-08-10 13:35:58 -0600 | [diff] [blame] | 176 | * All per-context meta state. |
| 177 | */ |
| 178 | struct gl_meta_state |
| 179 | { |
| 180 | struct save_state Save; /**< state saved during meta-ops */ |
| 181 | |
| 182 | struct blit_state Blit; /**< For _mesa_meta_blit_framebuffer() */ |
| 183 | struct clear_state Clear; /**< For _mesa_meta_clear() */ |
Brian Paul | c16fa38 | 2009-08-10 14:43:15 -0600 | [diff] [blame] | 184 | struct copypix_state CopyPix; /**< For _mesa_meta_copy_pixels() */ |
Brian Paul | 33a838b | 2009-08-10 13:35:58 -0600 | [diff] [blame] | 185 | |
| 186 | /* other possible meta-ops: |
| 187 | * glDrawPixels() |
| 188 | * glCopyPixels() |
| 189 | * glBitmap() |
| 190 | */ |
| 191 | }; |
| 192 | |
| 193 | |
| 194 | /** |
| 195 | * Initialize meta-ops for a context. |
| 196 | * To be called once during context creation. |
| 197 | */ |
| 198 | void |
| 199 | _mesa_meta_init(GLcontext *ctx) |
| 200 | { |
| 201 | ASSERT(!ctx->Meta); |
| 202 | |
| 203 | ctx->Meta = CALLOC_STRUCT(gl_meta_state); |
| 204 | } |
| 205 | |
| 206 | |
| 207 | /** |
| 208 | * Free context meta-op state. |
| 209 | * To be called once during context destruction. |
| 210 | */ |
| 211 | void |
| 212 | _mesa_meta_free(GLcontext *ctx) |
| 213 | { |
| 214 | struct gl_meta_state *meta = ctx->Meta; |
| 215 | |
| 216 | if (meta->Blit.TexObj) { |
| 217 | _mesa_DeleteTextures(1, &meta->Blit.TexObj); |
| 218 | _mesa_DeleteBuffersARB(1, & meta->Blit.VBO); |
| 219 | _mesa_DeleteVertexArraysAPPLE(1, &meta->Blit.ArrayObj); |
| 220 | } |
| 221 | |
| 222 | if (meta->Clear.VBO) { |
| 223 | _mesa_DeleteBuffersARB(1, & meta->Clear.VBO); |
| 224 | _mesa_DeleteVertexArraysAPPLE(1, &meta->Clear.ArrayObj); |
| 225 | } |
| 226 | |
Brian Paul | c16fa38 | 2009-08-10 14:43:15 -0600 | [diff] [blame] | 227 | if (meta->CopyPix.TexObj) { |
| 228 | _mesa_DeleteTextures(1, &meta->CopyPix.TexObj); |
| 229 | _mesa_DeleteBuffersARB(1, & meta->CopyPix.VBO); |
| 230 | _mesa_DeleteVertexArraysAPPLE(1, &meta->CopyPix.ArrayObj); |
| 231 | } |
| 232 | |
Brian Paul | 33a838b | 2009-08-10 13:35:58 -0600 | [diff] [blame] | 233 | _mesa_free(ctx->Meta); |
| 234 | ctx->Meta = NULL; |
| 235 | } |
| 236 | |
| 237 | |
| 238 | /** |
| 239 | * Enter meta state. This is like a light-weight version of glPushAttrib |
| 240 | * but it also resets most GL state back to default values. |
| 241 | * |
| 242 | * \param state bitmask of META_* flags indicating which attribute groups |
| 243 | * to save and reset to their defaults |
| 244 | */ |
| 245 | static void |
| 246 | _mesa_meta_begin(GLcontext *ctx, GLbitfield state) |
| 247 | { |
| 248 | struct save_state *save = &ctx->Meta->Save; |
| 249 | |
| 250 | save->SavedState = state; |
| 251 | |
| 252 | if (state & META_ALPHA_TEST) { |
| 253 | save->AlphaEnabled = ctx->Color.AlphaEnabled; |
| 254 | if (ctx->Color.AlphaEnabled) |
| 255 | _mesa_Disable(GL_ALPHA_TEST); |
| 256 | } |
| 257 | |
| 258 | if (state & META_BLEND) { |
| 259 | save->BlendEnabled = ctx->Color.BlendEnabled; |
| 260 | if (ctx->Color.BlendEnabled) |
| 261 | _mesa_Disable(GL_BLEND); |
| 262 | save->ColorLogicOpEnabled = ctx->Color.ColorLogicOpEnabled; |
| 263 | if (ctx->Color.ColorLogicOpEnabled) |
| 264 | _mesa_Disable(GL_COLOR_LOGIC_OP); |
| 265 | } |
| 266 | |
| 267 | if (state & META_COLOR_MASK) { |
| 268 | COPY_4V(save->ColorMask, ctx->Color.ColorMask); |
| 269 | if (!ctx->Color.ColorMask[0] || |
| 270 | !ctx->Color.ColorMask[1] || |
| 271 | !ctx->Color.ColorMask[2] || |
| 272 | !ctx->Color.ColorMask[3]) |
| 273 | _mesa_ColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE); |
| 274 | } |
| 275 | |
| 276 | if (state & META_DEPTH_TEST) { |
| 277 | save->Depth = ctx->Depth; /* struct copy */ |
| 278 | if (ctx->Depth.Test) |
| 279 | _mesa_Disable(GL_DEPTH_TEST); |
| 280 | } |
| 281 | |
| 282 | if (state & META_RASTERIZATION) { |
| 283 | save->FrontPolygonMode = ctx->Polygon.FrontMode; |
| 284 | save->BackPolygonMode = ctx->Polygon.BackMode; |
| 285 | save->PolygonOffset = ctx->Polygon.OffsetFill; |
| 286 | save->PolygonSmooth = ctx->Polygon.SmoothFlag; |
| 287 | save->PolygonStipple = ctx->Polygon.StippleFlag; |
| 288 | save->PolygonCull = ctx->Polygon.CullFlag; |
| 289 | _mesa_PolygonMode(GL_FRONT_AND_BACK, GL_FILL); |
| 290 | _mesa_set_enable(ctx, GL_POLYGON_OFFSET_FILL, GL_FALSE); |
| 291 | _mesa_set_enable(ctx, GL_POLYGON_SMOOTH, GL_FALSE); |
| 292 | _mesa_set_enable(ctx, GL_POLYGON_STIPPLE, GL_FALSE); |
| 293 | _mesa_set_enable(ctx, GL_CULL_FACE, GL_FALSE); |
| 294 | } |
| 295 | |
| 296 | if (state & META_SCISSOR) { |
| 297 | save->Scissor = ctx->Scissor; /* struct copy */ |
| 298 | } |
| 299 | |
| 300 | if (state & META_SHADER) { |
| 301 | if (ctx->Extensions.ARB_vertex_program) { |
| 302 | save->VertexProgramEnabled = ctx->VertexProgram.Enabled; |
| 303 | save->VertexProgram = ctx->VertexProgram.Current; |
| 304 | _mesa_set_enable(ctx, GL_VERTEX_PROGRAM_ARB, GL_FALSE); |
| 305 | } |
| 306 | |
| 307 | if (ctx->Extensions.ARB_fragment_program) { |
| 308 | save->FragmentProgramEnabled = ctx->FragmentProgram.Enabled; |
| 309 | save->FragmentProgram = ctx->FragmentProgram.Current; |
| 310 | _mesa_set_enable(ctx, GL_FRAGMENT_PROGRAM_ARB, GL_FALSE); |
| 311 | } |
| 312 | |
| 313 | if (ctx->Extensions.ARB_shader_objects) { |
| 314 | save->Shader = ctx->Shader.CurrentProgram ? |
| 315 | ctx->Shader.CurrentProgram->Name : 0; |
| 316 | _mesa_UseProgramObjectARB(0); |
| 317 | } |
| 318 | } |
| 319 | |
| 320 | if (state & META_STENCIL_TEST) { |
| 321 | save->Stencil = ctx->Stencil; /* struct copy */ |
| 322 | if (ctx->Stencil.Enabled) |
| 323 | _mesa_Disable(GL_STENCIL_TEST); |
| 324 | /* NOTE: other stencil state not reset */ |
| 325 | } |
| 326 | |
| 327 | if (state & META_TEXTURE) { |
| 328 | GLuint u, tgt; |
| 329 | |
| 330 | save->ActiveUnit = ctx->Texture.CurrentUnit; |
| 331 | save->ClientActiveUnit = ctx->Array.ActiveTexture; |
| 332 | save->EnvMode = ctx->Texture.Unit[0].EnvMode; |
| 333 | |
| 334 | /* Disable all texture units */ |
| 335 | for (u = 0; u < ctx->Const.MaxTextureUnits; u++) { |
| 336 | save->TexEnabled[u] = ctx->Texture.Unit[u].Enabled; |
| 337 | save->TexGenEnabled[u] = ctx->Texture.Unit[u].TexGenEnabled; |
| 338 | _mesa_ActiveTextureARB(GL_TEXTURE0 + u); |
| 339 | _mesa_set_enable(ctx, GL_TEXTURE_1D, GL_FALSE); |
| 340 | _mesa_set_enable(ctx, GL_TEXTURE_2D, GL_FALSE); |
| 341 | _mesa_set_enable(ctx, GL_TEXTURE_3D, GL_FALSE); |
| 342 | _mesa_set_enable(ctx, GL_TEXTURE_CUBE_MAP, GL_FALSE); |
| 343 | _mesa_set_enable(ctx, GL_TEXTURE_RECTANGLE, GL_FALSE); |
| 344 | _mesa_set_enable(ctx, GL_TEXTURE_GEN_S, GL_FALSE); |
| 345 | _mesa_set_enable(ctx, GL_TEXTURE_GEN_T, GL_FALSE); |
| 346 | _mesa_set_enable(ctx, GL_TEXTURE_GEN_R, GL_FALSE); |
| 347 | _mesa_set_enable(ctx, GL_TEXTURE_GEN_Q, GL_FALSE); |
| 348 | } |
| 349 | |
| 350 | /* save current texture objects for unit[0] only */ |
| 351 | for (tgt = 0; tgt < NUM_TEXTURE_TARGETS; tgt++) { |
| 352 | _mesa_reference_texobj(&save->CurrentTexture[tgt], |
| 353 | ctx->Texture.Unit[0].CurrentTex[tgt]); |
| 354 | } |
| 355 | |
| 356 | /* set defaults for unit[0] */ |
| 357 | _mesa_ActiveTextureARB(GL_TEXTURE0); |
| 358 | _mesa_ClientActiveTextureARB(GL_TEXTURE0); |
| 359 | _mesa_TexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE); |
| 360 | _mesa_set_enable(ctx, GL_TEXTURE_GEN_S, GL_FALSE); |
| 361 | _mesa_set_enable(ctx, GL_TEXTURE_GEN_T, GL_FALSE); |
| 362 | _mesa_set_enable(ctx, GL_TEXTURE_GEN_R, GL_FALSE); |
| 363 | _mesa_set_enable(ctx, GL_TEXTURE_GEN_Q, GL_FALSE); |
| 364 | } |
| 365 | |
| 366 | if (state & META_TRANSFORM) { |
Brian Paul | edb991b | 2009-08-10 15:44:05 -0600 | [diff] [blame^] | 367 | GLuint activeTexture = ctx->Texture.CurrentUnit; |
Brian Paul | 33a838b | 2009-08-10 13:35:58 -0600 | [diff] [blame] | 368 | _mesa_memcpy(save->ModelviewMatrix, ctx->ModelviewMatrixStack.Top->m, |
| 369 | 16 * sizeof(GLfloat)); |
| 370 | _mesa_memcpy(save->ProjectionMatrix, ctx->ProjectionMatrixStack.Top->m, |
| 371 | 16 * sizeof(GLfloat)); |
Brian Paul | edb991b | 2009-08-10 15:44:05 -0600 | [diff] [blame^] | 372 | _mesa_memcpy(save->TextureMatrix, ctx->TextureMatrixStack[0].Top->m, |
| 373 | 16 * sizeof(GLfloat)); |
Brian Paul | 33a838b | 2009-08-10 13:35:58 -0600 | [diff] [blame] | 374 | save->MatrixMode = ctx->Transform.MatrixMode; |
| 375 | /* set 1:1 vertex:pixel coordinate transform */ |
Brian Paul | edb991b | 2009-08-10 15:44:05 -0600 | [diff] [blame^] | 376 | _mesa_ActiveTextureARB(GL_TEXTURE0); |
| 377 | _mesa_MatrixMode(GL_TEXTURE); |
| 378 | _mesa_LoadIdentity(); |
| 379 | _mesa_ActiveTextureARB(GL_TEXTURE0 + activeTexture); |
Brian Paul | 33a838b | 2009-08-10 13:35:58 -0600 | [diff] [blame] | 380 | _mesa_MatrixMode(GL_MODELVIEW); |
| 381 | _mesa_LoadIdentity(); |
| 382 | _mesa_MatrixMode(GL_PROJECTION); |
| 383 | _mesa_LoadIdentity(); |
| 384 | _mesa_Ortho(0.0F, ctx->DrawBuffer->Width, |
| 385 | 0.0F, ctx->DrawBuffer->Height, |
| 386 | -1.0F, 1.0F); |
| 387 | save->ClipPlanesEnabled = ctx->Transform.ClipPlanesEnabled; |
| 388 | if (ctx->Transform.ClipPlanesEnabled) { |
| 389 | GLuint i; |
| 390 | for (i = 0; i < ctx->Const.MaxClipPlanes; i++) { |
| 391 | _mesa_set_enable(ctx, GL_CLIP_PLANE0 + i, GL_FALSE); |
| 392 | } |
| 393 | } |
| 394 | } |
| 395 | |
| 396 | if (state & META_VERTEX) { |
| 397 | /* save vertex array object state */ |
| 398 | _mesa_reference_array_object(ctx, &save->ArrayObj, |
| 399 | ctx->Array.ArrayObj); |
| 400 | _mesa_reference_buffer_object(ctx, &save->ArrayBufferObj, |
| 401 | ctx->Array.ArrayBufferObj); |
| 402 | /* set some default state? */ |
| 403 | } |
| 404 | |
| 405 | if (state & META_VIEWPORT) { |
| 406 | save->ViewportX = ctx->Viewport.X; |
| 407 | save->ViewportY = ctx->Viewport.Y; |
| 408 | save->ViewportW = ctx->Viewport.Width; |
| 409 | save->ViewportH = ctx->Viewport.Height; |
| 410 | _mesa_Viewport(0, 0, ctx->DrawBuffer->Width, ctx->DrawBuffer->Height); |
| 411 | save->DepthNear = ctx->Viewport.Near; |
| 412 | save->DepthFar = ctx->Viewport.Far; |
| 413 | _mesa_DepthRange(0.0, 1.0); |
| 414 | } |
| 415 | |
| 416 | /* misc */ |
| 417 | { |
| 418 | save->Lighting = ctx->Light.Enabled; |
| 419 | if (ctx->Light.Enabled) |
| 420 | _mesa_set_enable(ctx, GL_LIGHTING, GL_FALSE); |
| 421 | |
| 422 | save->Fog = ctx->Fog.Enabled; |
| 423 | if (ctx->Fog.Enabled) |
| 424 | _mesa_set_enable(ctx, GL_FOG, GL_FALSE); |
| 425 | } |
| 426 | } |
| 427 | |
| 428 | |
| 429 | /** |
| 430 | * Leave meta state. This is like a light-weight version of glPopAttrib(). |
| 431 | */ |
| 432 | static void |
| 433 | _mesa_meta_end(GLcontext *ctx) |
| 434 | { |
| 435 | struct save_state *save = &ctx->Meta->Save; |
| 436 | const GLbitfield state = save->SavedState; |
| 437 | |
| 438 | if (state & META_ALPHA_TEST) { |
| 439 | if (ctx->Color.AlphaEnabled != save->AlphaEnabled) |
| 440 | _mesa_set_enable(ctx, GL_ALPHA_TEST, save->AlphaEnabled); |
| 441 | } |
| 442 | |
| 443 | if (state & META_BLEND) { |
| 444 | if (ctx->Color.BlendEnabled != save->BlendEnabled) |
| 445 | _mesa_set_enable(ctx, GL_BLEND, save->BlendEnabled); |
| 446 | if (ctx->Color.ColorLogicOpEnabled != save->ColorLogicOpEnabled) |
| 447 | _mesa_set_enable(ctx, GL_COLOR_LOGIC_OP, save->ColorLogicOpEnabled); |
| 448 | } |
| 449 | |
| 450 | if (state & META_COLOR_MASK) { |
| 451 | if (!TEST_EQ_4V(ctx->Color.ColorMask, save->ColorMask)) |
| 452 | _mesa_ColorMask(save->ColorMask[0], save->ColorMask[1], |
| 453 | save->ColorMask[2], save->ColorMask[3]); |
| 454 | } |
| 455 | |
| 456 | if (state & META_DEPTH_TEST) { |
| 457 | if (ctx->Depth.Test != save->Depth.Test) |
| 458 | _mesa_set_enable(ctx, GL_DEPTH_TEST, save->Depth.Test); |
| 459 | _mesa_DepthFunc(save->Depth.Func); |
| 460 | _mesa_DepthMask(save->Depth.Mask); |
| 461 | } |
| 462 | |
| 463 | if (state & META_RASTERIZATION) { |
| 464 | _mesa_PolygonMode(GL_FRONT, save->FrontPolygonMode); |
| 465 | _mesa_PolygonMode(GL_BACK, save->BackPolygonMode); |
| 466 | _mesa_set_enable(ctx, GL_POLYGON_STIPPLE, save->PolygonStipple); |
| 467 | _mesa_set_enable(ctx, GL_POLYGON_OFFSET_FILL, save->PolygonOffset); |
| 468 | _mesa_set_enable(ctx, GL_POLYGON_SMOOTH, save->PolygonSmooth); |
| 469 | _mesa_set_enable(ctx, GL_CULL_FACE, save->PolygonCull); |
| 470 | } |
| 471 | |
| 472 | if (state & META_SCISSOR) { |
| 473 | _mesa_set_enable(ctx, GL_SCISSOR_TEST, save->Scissor.Enabled); |
| 474 | _mesa_Scissor(save->Scissor.X, save->Scissor.Y, |
| 475 | save->Scissor.Width, save->Scissor.Height); |
| 476 | } |
| 477 | |
| 478 | if (state & META_SHADER) { |
| 479 | if (ctx->Extensions.ARB_vertex_program) { |
| 480 | _mesa_set_enable(ctx, GL_VERTEX_PROGRAM_ARB, |
| 481 | save->VertexProgramEnabled); |
| 482 | _mesa_reference_vertprog(ctx, &ctx->VertexProgram.Current, |
| 483 | save->VertexProgram); |
| 484 | } |
| 485 | |
| 486 | if (ctx->Extensions.ARB_fragment_program) { |
| 487 | _mesa_set_enable(ctx, GL_FRAGMENT_PROGRAM_ARB, |
| 488 | save->FragmentProgramEnabled); |
| 489 | _mesa_reference_fragprog(ctx, &ctx->FragmentProgram.Current, |
| 490 | save->FragmentProgram); |
| 491 | } |
| 492 | |
| 493 | if (ctx->Extensions.ARB_shader_objects) { |
| 494 | _mesa_UseProgramObjectARB(save->Shader); |
| 495 | } |
| 496 | } |
| 497 | |
| 498 | if (state & META_STENCIL_TEST) { |
| 499 | const struct gl_stencil_attrib *stencil = &save->Stencil; |
| 500 | |
| 501 | _mesa_set_enable(ctx, GL_STENCIL_TEST, stencil->Enabled); |
| 502 | _mesa_ClearStencil(stencil->Clear); |
| 503 | if (ctx->Extensions.EXT_stencil_two_side) { |
| 504 | _mesa_set_enable(ctx, GL_STENCIL_TEST_TWO_SIDE_EXT, |
| 505 | stencil->TestTwoSide); |
| 506 | _mesa_ActiveStencilFaceEXT(stencil->ActiveFace |
| 507 | ? GL_BACK : GL_FRONT); |
| 508 | } |
| 509 | /* front state */ |
| 510 | _mesa_StencilFuncSeparate(GL_FRONT, |
| 511 | stencil->Function[0], |
| 512 | stencil->Ref[0], |
| 513 | stencil->ValueMask[0]); |
| 514 | _mesa_StencilMaskSeparate(GL_FRONT, stencil->WriteMask[0]); |
| 515 | _mesa_StencilOpSeparate(GL_FRONT, stencil->FailFunc[0], |
| 516 | stencil->ZFailFunc[0], |
| 517 | stencil->ZPassFunc[0]); |
| 518 | /* back state */ |
| 519 | _mesa_StencilFuncSeparate(GL_BACK, |
| 520 | stencil->Function[1], |
| 521 | stencil->Ref[1], |
| 522 | stencil->ValueMask[1]); |
| 523 | _mesa_StencilMaskSeparate(GL_BACK, stencil->WriteMask[1]); |
| 524 | _mesa_StencilOpSeparate(GL_BACK, stencil->FailFunc[1], |
| 525 | stencil->ZFailFunc[1], |
| 526 | stencil->ZPassFunc[1]); |
| 527 | } |
| 528 | |
| 529 | if (state & META_TEXTURE) { |
| 530 | GLuint u, tgt; |
| 531 | |
| 532 | ASSERT(ctx->Texture.CurrentUnit == 0); |
| 533 | |
| 534 | /* restore texenv for unit[0] */ |
| 535 | _mesa_TexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, save->EnvMode); |
| 536 | |
| 537 | /* restore texture objects for unit[0] only */ |
| 538 | for (tgt = 0; tgt < NUM_TEXTURE_TARGETS; tgt++) { |
| 539 | _mesa_reference_texobj(&ctx->Texture.Unit[0].CurrentTex[tgt], |
| 540 | save->CurrentTexture[tgt]); |
| 541 | } |
| 542 | |
| 543 | /* Re-enable textures, texgen */ |
| 544 | for (u = 0; u < ctx->Const.MaxTextureUnits; u++) { |
| 545 | if (save->TexEnabled[u]) { |
| 546 | _mesa_ActiveTextureARB(GL_TEXTURE0 + u); |
| 547 | |
| 548 | if (save->TexEnabled[u] & TEXTURE_1D_BIT) |
| 549 | _mesa_set_enable(ctx, GL_TEXTURE_1D, GL_TRUE); |
| 550 | if (save->TexEnabled[u] & TEXTURE_2D_BIT) |
| 551 | _mesa_set_enable(ctx, GL_TEXTURE_2D, GL_TRUE); |
| 552 | if (save->TexEnabled[u] & TEXTURE_3D_BIT) |
| 553 | _mesa_set_enable(ctx, GL_TEXTURE_3D, GL_TRUE); |
| 554 | if (save->TexEnabled[u] & TEXTURE_CUBE_BIT) |
| 555 | _mesa_set_enable(ctx, GL_TEXTURE_CUBE_MAP, GL_TRUE); |
| 556 | if (save->TexEnabled[u] & TEXTURE_RECT_BIT) |
| 557 | _mesa_set_enable(ctx, GL_TEXTURE_RECTANGLE, GL_TRUE); |
| 558 | } |
| 559 | |
| 560 | if (save->TexGenEnabled[u]) { |
| 561 | _mesa_ActiveTextureARB(GL_TEXTURE0 + u); |
| 562 | |
| 563 | if (save->TexGenEnabled[u] & S_BIT) |
| 564 | _mesa_set_enable(ctx, GL_TEXTURE_GEN_S, GL_TRUE); |
| 565 | if (save->TexGenEnabled[u] & T_BIT) |
| 566 | _mesa_set_enable(ctx, GL_TEXTURE_GEN_T, GL_TRUE); |
| 567 | if (save->TexGenEnabled[u] & R_BIT) |
| 568 | _mesa_set_enable(ctx, GL_TEXTURE_GEN_R, GL_TRUE); |
| 569 | if (save->TexGenEnabled[u] & Q_BIT) |
| 570 | _mesa_set_enable(ctx, GL_TEXTURE_GEN_Q, GL_TRUE); |
| 571 | } |
| 572 | } |
| 573 | |
| 574 | /* restore current unit state */ |
| 575 | _mesa_ActiveTextureARB(GL_TEXTURE0 + save->ActiveUnit); |
| 576 | _mesa_ClientActiveTextureARB(GL_TEXTURE0 + save->ClientActiveUnit); |
| 577 | } |
| 578 | |
| 579 | if (state & META_TRANSFORM) { |
Brian Paul | edb991b | 2009-08-10 15:44:05 -0600 | [diff] [blame^] | 580 | GLuint activeTexture = ctx->Texture.CurrentUnit; |
| 581 | _mesa_ActiveTextureARB(GL_TEXTURE0); |
| 582 | _mesa_MatrixMode(GL_TEXTURE); |
| 583 | _mesa_LoadMatrixf(save->TextureMatrix); |
| 584 | _mesa_ActiveTextureARB(GL_TEXTURE0 + activeTexture); |
| 585 | |
Brian Paul | 33a838b | 2009-08-10 13:35:58 -0600 | [diff] [blame] | 586 | _mesa_MatrixMode(GL_MODELVIEW); |
| 587 | _mesa_LoadMatrixf(save->ModelviewMatrix); |
Brian Paul | edb991b | 2009-08-10 15:44:05 -0600 | [diff] [blame^] | 588 | |
Brian Paul | 33a838b | 2009-08-10 13:35:58 -0600 | [diff] [blame] | 589 | _mesa_MatrixMode(GL_PROJECTION); |
| 590 | _mesa_LoadMatrixf(save->ProjectionMatrix); |
Brian Paul | edb991b | 2009-08-10 15:44:05 -0600 | [diff] [blame^] | 591 | |
Brian Paul | 33a838b | 2009-08-10 13:35:58 -0600 | [diff] [blame] | 592 | _mesa_MatrixMode(save->MatrixMode); |
Brian Paul | edb991b | 2009-08-10 15:44:05 -0600 | [diff] [blame^] | 593 | |
Brian Paul | 33a838b | 2009-08-10 13:35:58 -0600 | [diff] [blame] | 594 | save->ClipPlanesEnabled = ctx->Transform.ClipPlanesEnabled; |
| 595 | if (save->ClipPlanesEnabled) { |
| 596 | GLuint i; |
| 597 | for (i = 0; i < ctx->Const.MaxClipPlanes; i++) { |
| 598 | if (save->ClipPlanesEnabled & (1 << i)) { |
| 599 | _mesa_set_enable(ctx, GL_CLIP_PLANE0 + i, GL_TRUE); |
| 600 | } |
| 601 | } |
| 602 | } |
| 603 | } |
| 604 | |
| 605 | if (state & META_VERTEX) { |
| 606 | /* restore vertex buffer object */ |
| 607 | _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, save->ArrayBufferObj->Name); |
| 608 | _mesa_reference_buffer_object(ctx, &save->ArrayBufferObj, NULL); |
| 609 | |
| 610 | /* restore vertex array object */ |
| 611 | _mesa_BindVertexArray(save->ArrayObj->Name); |
| 612 | _mesa_reference_array_object(ctx, &save->ArrayObj, NULL); |
| 613 | } |
| 614 | |
| 615 | if (state & META_VIEWPORT) { |
| 616 | _mesa_Viewport(save->ViewportX, save->ViewportY, |
| 617 | save->ViewportW, save->ViewportH); |
| 618 | _mesa_DepthRange(save->DepthNear, save->DepthFar); |
| 619 | } |
| 620 | |
| 621 | /* misc */ |
| 622 | if (save->Lighting) { |
| 623 | _mesa_set_enable(ctx, GL_LIGHTING, GL_TRUE); |
| 624 | } |
| 625 | if (save->Fog) { |
| 626 | _mesa_set_enable(ctx, GL_FOG, GL_TRUE); |
| 627 | } |
| 628 | } |
| 629 | |
| 630 | |
| 631 | /** |
| 632 | * Meta implementation of ctx->Driver.BlitFramebuffer() in terms |
| 633 | * of texture mapping and polygon rendering. |
| 634 | * Note: this function requires GL_ARB_texture_rectangle support. |
| 635 | */ |
| 636 | void |
| 637 | _mesa_meta_blit_framebuffer(GLcontext *ctx, |
| 638 | GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1, |
| 639 | GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1, |
| 640 | GLbitfield mask, GLenum filter) |
| 641 | { |
| 642 | struct blit_state *blit = &ctx->Meta->Blit; |
| 643 | const GLint srcX = MIN2(srcX0, srcX1); |
| 644 | const GLint srcY = MIN2(srcY0, srcY1); |
| 645 | const GLint srcW = abs(srcX1 - srcX0); |
| 646 | const GLint srcH = abs(srcY1 - srcY0); |
| 647 | GLboolean srcFlipX = srcX1 < srcX0; |
| 648 | GLboolean srcFlipY = srcY1 < srcY0; |
| 649 | |
| 650 | ASSERT(ctx->Extensions.NV_texture_rectangle); |
| 651 | |
Brian Paul | 2ad10c9 | 2009-08-10 15:05:53 -0600 | [diff] [blame] | 652 | if (srcW > ctx->Const.MaxTextureRectSize || |
| 653 | srcH > ctx->Const.MaxTextureRectSize) { |
| 654 | /* XXX avoid this fallback */ |
| 655 | _swrast_BlitFramebuffer(ctx, srcX0, srcY0, srcX1, srcY1, |
| 656 | dstX0, dstY0, dstX1, dstY1, mask, filter); |
| 657 | return; |
| 658 | } |
| 659 | |
| 660 | |
Brian Paul | 33a838b | 2009-08-10 13:35:58 -0600 | [diff] [blame] | 661 | if (srcFlipX) { |
| 662 | GLint tmp = dstX0; |
| 663 | dstX0 = dstX1; |
| 664 | dstX1 = tmp; |
| 665 | } |
| 666 | |
| 667 | if (srcFlipY) { |
| 668 | GLint tmp = dstY0; |
| 669 | dstY0 = dstY1; |
| 670 | dstY1 = tmp; |
| 671 | } |
| 672 | |
| 673 | /* only scissor effects blit so save/clear all other relevant state */ |
| 674 | _mesa_meta_begin(ctx, ~META_SCISSOR); |
| 675 | |
| 676 | if (blit->TexObj == 0) { |
| 677 | /* one-time setup */ |
| 678 | |
| 679 | /* create texture object */ |
| 680 | _mesa_GenTextures(1, &blit->TexObj); |
| 681 | _mesa_BindTexture(GL_TEXTURE_RECTANGLE, blit->TexObj); |
| 682 | _mesa_TexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE); |
| 683 | } |
| 684 | else { |
| 685 | _mesa_BindTexture(GL_TEXTURE_RECTANGLE, blit->TexObj); |
| 686 | } |
| 687 | |
| 688 | _mesa_TexParameteri(GL_TEXTURE_RECTANGLE, GL_TEXTURE_MIN_FILTER, filter); |
| 689 | _mesa_TexParameteri(GL_TEXTURE_RECTANGLE, GL_TEXTURE_MAG_FILTER, filter); |
| 690 | |
| 691 | if (blit->ArrayObj == 0) { |
| 692 | /* one-time setup */ |
| 693 | |
| 694 | /* create vertex array object */ |
| 695 | _mesa_GenVertexArrays(1, &blit->ArrayObj); |
| 696 | _mesa_BindVertexArray(blit->ArrayObj); |
| 697 | |
| 698 | /* create vertex array buffer */ |
| 699 | _mesa_GenBuffersARB(1, &blit->VBO); |
| 700 | _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, blit->VBO); |
| 701 | _mesa_BufferDataARB(GL_ARRAY_BUFFER_ARB, sizeof(blit->verts), |
| 702 | blit->verts, GL_STREAM_DRAW_ARB); |
| 703 | |
| 704 | /* setup vertex arrays */ |
| 705 | _mesa_VertexPointer(2, GL_FLOAT, 4 * sizeof(GLfloat), |
| 706 | (void*) (0 * sizeof(GLfloat))); |
| 707 | _mesa_TexCoordPointer(2, GL_FLOAT, 4 * sizeof(GLfloat), |
| 708 | (void *) (2 * sizeof(GLfloat))); |
| 709 | _mesa_EnableClientState(GL_VERTEX_ARRAY); |
| 710 | _mesa_EnableClientState(GL_TEXTURE_COORD_ARRAY); |
| 711 | } |
| 712 | else { |
| 713 | _mesa_BindVertexArray(blit->ArrayObj); |
| 714 | _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, blit->VBO); |
| 715 | } |
| 716 | |
| 717 | /* vertex positions */ |
| 718 | blit->verts[0][0] = (GLfloat) dstX0; |
| 719 | blit->verts[0][1] = (GLfloat) dstY0; |
| 720 | blit->verts[1][0] = (GLfloat) dstX1; |
| 721 | blit->verts[1][1] = (GLfloat) dstY0; |
| 722 | blit->verts[2][0] = (GLfloat) dstX1; |
| 723 | blit->verts[2][1] = (GLfloat) dstY1; |
| 724 | blit->verts[3][0] = (GLfloat) dstX0; |
| 725 | blit->verts[3][1] = (GLfloat) dstY1; |
| 726 | |
| 727 | /* texcoords */ |
| 728 | blit->verts[0][2] = 0.0F; |
| 729 | blit->verts[0][3] = 0.0F; |
| 730 | blit->verts[1][2] = (GLfloat) srcW; |
| 731 | blit->verts[1][3] = 0.0F; |
| 732 | blit->verts[2][2] = (GLfloat) srcW; |
| 733 | blit->verts[2][3] = (GLfloat) srcH; |
| 734 | blit->verts[3][2] = 0.0F; |
| 735 | blit->verts[3][3] = (GLfloat) srcH; |
| 736 | |
| 737 | /* upload new vertex data */ |
| 738 | _mesa_BufferSubDataARB(GL_ARRAY_BUFFER_ARB, 0, |
| 739 | sizeof(blit->verts), blit->verts); |
| 740 | |
| 741 | /* copy framebuffer image to texture */ |
| 742 | if (mask & GL_COLOR_BUFFER_BIT) { |
Brian Paul | 2ad10c9 | 2009-08-10 15:05:53 -0600 | [diff] [blame] | 743 | if (blit->TexWidth == srcW && |
| 744 | blit->TexHeight == srcH && |
| 745 | blit->TexType == GL_RGBA) { |
| 746 | /* replace existing tex image */ |
| 747 | _mesa_CopyTexSubImage2D(GL_TEXTURE_RECTANGLE, 0, |
| 748 | 0, 0, srcX, srcY, srcW, srcH); |
| 749 | } |
| 750 | else { |
| 751 | /* create new tex image */ |
| 752 | _mesa_CopyTexImage2D(GL_TEXTURE_RECTANGLE, 0, GL_RGBA, |
| 753 | srcX, srcY, srcW, srcH, 0); |
| 754 | blit->TexWidth = srcW; |
| 755 | blit->TexHeight = srcH; |
| 756 | blit->TexType = GL_RGBA; |
| 757 | } |
| 758 | |
Brian Paul | 33a838b | 2009-08-10 13:35:58 -0600 | [diff] [blame] | 759 | mask &= ~GL_COLOR_BUFFER_BIT; |
| 760 | } |
| 761 | |
| 762 | _mesa_Enable(GL_TEXTURE_RECTANGLE); |
| 763 | |
| 764 | /* draw textured quad */ |
| 765 | _mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4); |
| 766 | |
| 767 | _mesa_Disable(GL_TEXTURE_RECTANGLE); |
| 768 | |
| 769 | _mesa_meta_end(ctx); |
| 770 | |
| 771 | /* XXX, TO-DO: try to handle these cases above! */ |
| 772 | if (mask & (GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT)) { |
| 773 | _swrast_BlitFramebuffer(ctx, srcX0, srcY0, srcX1, srcY1, |
| 774 | dstX0, dstY0, dstX1, dstY1, mask, filter); |
| 775 | } |
Brian Paul | 33a838b | 2009-08-10 13:35:58 -0600 | [diff] [blame] | 776 | } |
| 777 | |
| 778 | |
| 779 | /** |
| 780 | * Meta implementation of ctx->Driver.Clear() in terms of polygon rendering. |
| 781 | */ |
| 782 | void |
| 783 | _mesa_meta_clear(GLcontext *ctx, GLbitfield buffers) |
| 784 | { |
| 785 | struct clear_state *clear = &ctx->Meta->Clear; |
| 786 | GLfloat z = 1.0 - 2.0 * ctx->Depth.Clear; |
| 787 | GLuint i; |
| 788 | |
| 789 | /* only scissor and color mask effects clearing */ |
| 790 | _mesa_meta_begin(ctx, ~(META_SCISSOR | META_COLOR_MASK)); |
| 791 | |
| 792 | if (clear->ArrayObj == 0) { |
| 793 | /* one-time setup */ |
| 794 | |
| 795 | /* create vertex array object */ |
| 796 | _mesa_GenVertexArrays(1, &clear->ArrayObj); |
| 797 | _mesa_BindVertexArray(clear->ArrayObj); |
| 798 | |
| 799 | /* create vertex array buffer */ |
| 800 | _mesa_GenBuffersARB(1, &clear->VBO); |
| 801 | _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, clear->VBO); |
| 802 | _mesa_BufferDataARB(GL_ARRAY_BUFFER_ARB, sizeof(clear->verts), |
| 803 | clear->verts, GL_STREAM_DRAW_ARB); |
| 804 | |
| 805 | /* setup vertex arrays */ |
| 806 | _mesa_VertexPointer(3, GL_FLOAT, 7 * sizeof(GLfloat), (void *) 0); |
| 807 | _mesa_ColorPointer(4, GL_FLOAT, 7 * sizeof(GLfloat), |
| 808 | (void *) (3 * sizeof(GLfloat))); |
| 809 | _mesa_EnableClientState(GL_VERTEX_ARRAY); |
| 810 | _mesa_EnableClientState(GL_COLOR_ARRAY); |
| 811 | } |
| 812 | else { |
| 813 | _mesa_BindVertexArray(clear->ArrayObj); |
| 814 | _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, clear->VBO); |
| 815 | } |
| 816 | |
| 817 | /* GL_COLOR_BUFFER_BIT */ |
| 818 | if (buffers & BUFFER_BITS_COLOR) { |
| 819 | /* leave colormask, glDrawBuffer state as-is */ |
| 820 | } |
| 821 | else { |
| 822 | _mesa_ColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE); |
| 823 | } |
| 824 | |
| 825 | /* GL_DEPTH_BUFFER_BIT */ |
| 826 | if (buffers & BUFFER_BIT_DEPTH) { |
| 827 | _mesa_set_enable(ctx, GL_DEPTH_TEST, GL_TRUE); |
| 828 | _mesa_DepthFunc(GL_ALWAYS); |
| 829 | _mesa_DepthMask(GL_TRUE); |
| 830 | } |
| 831 | else { |
| 832 | assert(!ctx->Depth.Test); |
| 833 | } |
| 834 | |
| 835 | /* GL_STENCIL_BUFFER_BIT */ |
| 836 | if (buffers & BUFFER_BIT_STENCIL) { |
| 837 | _mesa_set_enable(ctx, GL_STENCIL_TEST, GL_TRUE); |
| 838 | _mesa_StencilOpSeparate(GL_FRONT_AND_BACK, |
| 839 | GL_REPLACE, GL_REPLACE, GL_REPLACE); |
| 840 | _mesa_StencilFuncSeparate(GL_FRONT_AND_BACK, GL_ALWAYS, |
| 841 | ctx->Stencil.Clear & 0x7fffffff, |
| 842 | ctx->Stencil.WriteMask[0]); |
| 843 | } |
| 844 | else { |
| 845 | assert(!ctx->Stencil.Enabled); |
| 846 | } |
| 847 | |
| 848 | /* vertex positions */ |
| 849 | clear->verts[0][0] = (GLfloat) ctx->DrawBuffer->_Xmin; |
| 850 | clear->verts[0][1] = (GLfloat) ctx->DrawBuffer->_Ymin; |
| 851 | clear->verts[0][2] = z; |
| 852 | clear->verts[1][0] = (GLfloat) ctx->DrawBuffer->_Xmax; |
| 853 | clear->verts[1][1] = (GLfloat) ctx->DrawBuffer->_Ymin; |
| 854 | clear->verts[1][2] = z; |
| 855 | clear->verts[2][0] = (GLfloat) ctx->DrawBuffer->_Xmax; |
| 856 | clear->verts[2][1] = (GLfloat) ctx->DrawBuffer->_Ymax; |
| 857 | clear->verts[2][2] = z; |
| 858 | clear->verts[3][0] = (GLfloat) ctx->DrawBuffer->_Xmin; |
| 859 | clear->verts[3][1] = (GLfloat) ctx->DrawBuffer->_Ymax; |
| 860 | clear->verts[3][2] = z; |
| 861 | |
| 862 | /* vertex colors */ |
| 863 | for (i = 0; i < 4; i++) { |
| 864 | COPY_4FV(&clear->verts[i][3], ctx->Color.ClearColor); |
| 865 | } |
| 866 | |
| 867 | /* upload new vertex data */ |
| 868 | _mesa_BufferSubDataARB(GL_ARRAY_BUFFER_ARB, 0, |
| 869 | sizeof(clear->verts), clear->verts); |
| 870 | |
| 871 | /* draw quad */ |
| 872 | _mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4); |
| 873 | |
| 874 | _mesa_meta_end(ctx); |
| 875 | } |
| 876 | |
Brian Paul | c16fa38 | 2009-08-10 14:43:15 -0600 | [diff] [blame] | 877 | |
| 878 | /** |
| 879 | * Meta implementation of ctx->Driver.CopyPixels() in terms |
| 880 | * of texture mapping and polygon rendering. |
| 881 | * Note: this function requires GL_ARB_texture_rectangle support. |
| 882 | */ |
| 883 | void |
| 884 | _mesa_meta_copy_pixels(GLcontext *ctx, GLint srcX, GLint srcY, |
| 885 | GLsizei width, GLsizei height, |
| 886 | GLint dstX, GLint dstY, GLenum type) |
| 887 | { |
| 888 | const GLenum filter = GL_NEAREST; |
| 889 | struct copypix_state *copypix = &ctx->Meta->CopyPix; |
| 890 | const GLfloat z = ctx->Current.RasterPos[2]; |
| 891 | const GLfloat dstX1 = dstX + width * ctx->Pixel.ZoomX; |
| 892 | const GLfloat dstY1 = dstY + height * ctx->Pixel.ZoomY; |
| 893 | |
| 894 | ASSERT(ctx->Extensions.NV_texture_rectangle); |
| 895 | |
| 896 | if (type != GL_COLOR || |
| 897 | ctx->_ImageTransferState || |
| 898 | width > ctx->Const.MaxTextureRectSize || |
| 899 | height > ctx->Const.MaxTextureRectSize) { |
| 900 | /* XXX avoid this fallback */ |
| 901 | _swrast_CopyPixels(ctx, srcX, srcY, width, height, dstX, dstY, type); |
| 902 | return; |
| 903 | } |
| 904 | |
| 905 | /* Most GL state applies to glCopyPixels, but a there's a few things |
| 906 | * we need to override: |
| 907 | */ |
| 908 | _mesa_meta_begin(ctx, (META_RASTERIZATION | |
| 909 | META_SHADER | |
Brian Paul | edb991b | 2009-08-10 15:44:05 -0600 | [diff] [blame^] | 910 | META_TEXTURE | |
Brian Paul | c16fa38 | 2009-08-10 14:43:15 -0600 | [diff] [blame] | 911 | META_TRANSFORM | |
Brian Paul | edb991b | 2009-08-10 15:44:05 -0600 | [diff] [blame^] | 912 | META_VERTEX | |
| 913 | META_VIEWPORT)); |
Brian Paul | c16fa38 | 2009-08-10 14:43:15 -0600 | [diff] [blame] | 914 | |
| 915 | if (copypix->TexObj == 0) { |
| 916 | /* one-time setup */ |
| 917 | |
| 918 | /* create texture object */ |
| 919 | _mesa_GenTextures(1, ©pix->TexObj); |
| 920 | _mesa_BindTexture(GL_TEXTURE_RECTANGLE, copypix->TexObj); |
| 921 | _mesa_TexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE); |
| 922 | _mesa_TexParameteri(GL_TEXTURE_RECTANGLE, GL_TEXTURE_MIN_FILTER, filter); |
| 923 | _mesa_TexParameteri(GL_TEXTURE_RECTANGLE, GL_TEXTURE_MAG_FILTER, filter); |
| 924 | } |
| 925 | else { |
| 926 | _mesa_BindTexture(GL_TEXTURE_RECTANGLE, copypix->TexObj); |
| 927 | } |
| 928 | |
| 929 | if (copypix->ArrayObj == 0) { |
| 930 | /* one-time setup */ |
| 931 | |
| 932 | /* create vertex array object */ |
| 933 | _mesa_GenVertexArrays(1, ©pix->ArrayObj); |
| 934 | _mesa_BindVertexArray(copypix->ArrayObj); |
| 935 | |
| 936 | /* create vertex array buffer */ |
| 937 | _mesa_GenBuffersARB(1, ©pix->VBO); |
| 938 | _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, copypix->VBO); |
| 939 | _mesa_BufferDataARB(GL_ARRAY_BUFFER_ARB, sizeof(copypix->verts), |
| 940 | copypix->verts, GL_STREAM_DRAW_ARB); |
| 941 | |
| 942 | /* setup vertex arrays */ |
| 943 | _mesa_VertexPointer(3, GL_FLOAT, sizeof(copypix->verts[0]), |
| 944 | (void*) (0 * sizeof(GLfloat))); |
| 945 | _mesa_TexCoordPointer(2, GL_FLOAT, sizeof(copypix->verts[0]), |
| 946 | (void *) (3 * sizeof(GLfloat))); |
| 947 | _mesa_EnableClientState(GL_VERTEX_ARRAY); |
| 948 | _mesa_EnableClientState(GL_TEXTURE_COORD_ARRAY); |
| 949 | } |
| 950 | else { |
| 951 | _mesa_BindVertexArray(copypix->ArrayObj); |
| 952 | _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, copypix->VBO); |
| 953 | } |
| 954 | |
| 955 | /* vertex positions, texcoords */ |
| 956 | copypix->verts[0][0] = (GLfloat) dstX; |
| 957 | copypix->verts[0][1] = (GLfloat) dstY; |
| 958 | copypix->verts[0][2] = z; |
| 959 | copypix->verts[0][3] = 0.0F; |
| 960 | copypix->verts[0][4] = 0.0F; |
| 961 | copypix->verts[1][0] = (GLfloat) dstX1; |
| 962 | copypix->verts[1][1] = (GLfloat) dstY; |
| 963 | copypix->verts[1][2] = z; |
| 964 | copypix->verts[1][3] = (GLfloat) width; |
| 965 | copypix->verts[1][4] = 0.0F; |
| 966 | copypix->verts[2][0] = (GLfloat) dstX1; |
| 967 | copypix->verts[2][1] = (GLfloat) dstY1; |
| 968 | copypix->verts[2][2] = z; |
| 969 | copypix->verts[2][3] = (GLfloat) width; |
| 970 | copypix->verts[2][4] = (GLfloat) height; |
| 971 | copypix->verts[3][0] = (GLfloat) dstX; |
| 972 | copypix->verts[3][1] = (GLfloat) dstY1; |
| 973 | copypix->verts[3][2] = z; |
| 974 | copypix->verts[3][3] = 0.0F; |
| 975 | copypix->verts[3][4] = (GLfloat) height; |
| 976 | |
| 977 | /* upload new vertex data */ |
| 978 | _mesa_BufferSubDataARB(GL_ARRAY_BUFFER_ARB, 0, |
| 979 | sizeof(copypix->verts), copypix->verts); |
| 980 | |
| 981 | /* copy framebuffer image to texture */ |
| 982 | if (type == GL_COLOR) { |
| 983 | if (copypix->TexWidth == width && |
| 984 | copypix->TexHeight == height && |
| 985 | copypix->TexType == type) { |
| 986 | /* replace existing tex image */ |
| 987 | _mesa_CopyTexSubImage2D(GL_TEXTURE_RECTANGLE, 0, |
| 988 | 0, 0, srcX, srcY, width, height); |
| 989 | } |
| 990 | else { |
| 991 | /* create new tex image */ |
| 992 | _mesa_CopyTexImage2D(GL_TEXTURE_RECTANGLE, 0, GL_RGBA, |
| 993 | srcX, srcY, width, height, 0); |
| 994 | copypix->TexWidth = width; |
| 995 | copypix->TexHeight = height; |
| 996 | copypix->TexType = type; |
| 997 | } |
| 998 | } |
| 999 | else if (type == GL_DEPTH) { |
| 1000 | /* TO-DO: Use a GL_DEPTH_COMPONENT texture and a fragment program/shader |
| 1001 | * that replaces the fragment.z value. |
| 1002 | */ |
| 1003 | } |
| 1004 | else { |
| 1005 | ASSERT(type == GL_STENCIL); |
| 1006 | /* have to use sw fallback */ |
| 1007 | } |
| 1008 | |
| 1009 | _mesa_Enable(GL_TEXTURE_RECTANGLE); |
| 1010 | |
| 1011 | /* draw textured quad */ |
| 1012 | _mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4); |
| 1013 | |
| 1014 | _mesa_Disable(GL_TEXTURE_RECTANGLE); |
| 1015 | |
| 1016 | _mesa_meta_end(ctx); |
| 1017 | } |