1 /**************************************************************************
3 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
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11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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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.
26 **************************************************************************/
29 * Generate fragment programs to implement pixel transfer ops, such as
30 * scale/bias, colormatrix, colortable, convolution...
36 #include "main/imports.h"
37 #include "main/image.h"
38 #include "main/macros.h"
39 #include "shader/program.h"
40 #include "shader/prog_instruction.h"
41 #include "shader/prog_parameter.h"
42 #include "shader/prog_print.h"
44 #include "st_context.h"
45 #include "st_format.h"
46 #include "st_texture.h"
47 #include "st_inlines.h"
49 #include "pipe/p_screen.h"
50 #include "pipe/p_context.h"
51 #include "util/u_pack_color.h"
56 GLuint scaleAndBias:1;
58 GLuint colorMatrixPostScaleBias:1;
62 GLfloat Maps[3][256][4];
65 pipeline_stage Stages[STAGE_MAX];
66 GLboolean StagesUsed[STAGE_MAX];
67 GLfloat Scale1[4], Bias1[4];
68 GLfloat Scale2[4], Bias2[4];
74 is_identity(const GLfloat m[16])
77 for (i = 0; i < 16; i++) {
78 const int row = i % 4, col = i / 4;
79 const float val = (GLfloat)(row == col);
88 make_state_key(GLcontext *ctx, struct state_key *key)
90 static const GLfloat zero[4] = { 0.0f, 0.0f, 0.0f, 0.0f };
91 static const GLfloat one[4] = { 1.0f, 1.0f, 1.0f, 1.0f };
93 memset(key, 0, sizeof(*key));
95 if (ctx->Pixel.RedBias != 0.0 || ctx->Pixel.RedScale != 1.0 ||
96 ctx->Pixel.GreenBias != 0.0 || ctx->Pixel.GreenScale != 1.0 ||
97 ctx->Pixel.BlueBias != 0.0 || ctx->Pixel.BlueScale != 1.0 ||
98 ctx->Pixel.AlphaBias != 0.0 || ctx->Pixel.AlphaScale != 1.0) {
99 key->scaleAndBias = 1;
102 if (!is_identity(ctx->ColorMatrixStack.Top->m)) {
103 key->colorMatrix = 1;
106 if (!TEST_EQ_4V(ctx->Pixel.PostColorMatrixScale, one) ||
107 !TEST_EQ_4V(ctx->Pixel.PostColorMatrixBias, zero)) {
108 key->colorMatrixPostScaleBias = 1;
111 key->pixelMaps = ctx->Pixel.MapColorFlag;
115 static struct pipe_texture *
116 create_color_map_texture(GLcontext *ctx)
118 struct pipe_context *pipe = ctx->st->pipe;
119 struct pipe_texture *pt;
120 enum pipe_format format;
121 const uint texSize = 256; /* simple, and usually perfect */
123 /* find an RGBA texture format */
124 format = st_choose_format(pipe->screen, GL_RGBA,
125 PIPE_TEXTURE_2D, PIPE_TEXTURE_USAGE_SAMPLER);
127 /* create texture for color map/table */
128 pt = st_texture_create(ctx->st, PIPE_TEXTURE_2D, format, 0,
129 texSize, texSize, 1, PIPE_TEXTURE_USAGE_SAMPLER);
135 * Update the pixelmap texture with the contents of the R/G/B/A pixel maps.
138 load_color_map_texture(GLcontext *ctx, struct pipe_texture *pt)
140 struct pipe_context *pipe = ctx->st->pipe;
141 struct pipe_transfer *transfer;
142 const GLuint rSize = ctx->PixelMaps.RtoR.Size;
143 const GLuint gSize = ctx->PixelMaps.GtoG.Size;
144 const GLuint bSize = ctx->PixelMaps.BtoB.Size;
145 const GLuint aSize = ctx->PixelMaps.AtoA.Size;
146 const uint texSize = pt->width0;
150 transfer = st_cond_flush_get_tex_transfer(st_context(ctx),
151 pt, 0, 0, 0, PIPE_TRANSFER_WRITE,
152 0, 0, texSize, texSize);
153 dest = (uint *) pipe->transfer_map(pipe, transfer);
155 /* Pack four 1D maps into a 2D texture:
156 * R map is placed horizontally, indexed by S, in channel 0
157 * G map is placed vertically, indexed by T, in channel 1
158 * B map is placed horizontally, indexed by S, in channel 2
159 * A map is placed vertically, indexed by T, in channel 3
161 for (i = 0; i < texSize; i++) {
162 for (j = 0; j < texSize; j++) {
164 int k = (i * texSize + j);
165 ubyte r = ctx->PixelMaps.RtoR.Map8[j * rSize / texSize];
166 ubyte g = ctx->PixelMaps.GtoG.Map8[i * gSize / texSize];
167 ubyte b = ctx->PixelMaps.BtoB.Map8[j * bSize / texSize];
168 ubyte a = ctx->PixelMaps.AtoA.Map8[i * aSize / texSize];
169 util_pack_color_ub(r, g, b, a, pt->format, &uc);
174 pipe->transfer_unmap(pipe, transfer);
175 pipe->tex_transfer_destroy(pipe, transfer);
183 * Returns a fragment program which implements the current pixel transfer ops.
185 static struct gl_fragment_program *
186 get_pixel_transfer_program(GLcontext *ctx, const struct state_key *key)
188 struct st_context *st = ctx->st;
189 struct prog_instruction inst[MAX_INST];
190 struct gl_program_parameter_list *params;
191 struct gl_fragment_program *fp;
193 const GLuint colorTemp = 0;
195 fp = (struct gl_fragment_program *)
196 ctx->Driver.NewProgram(ctx, GL_FRAGMENT_PROGRAM_ARB, 0);
200 params = _mesa_new_parameter_list();
203 * Get initial pixel color from the texture.
204 * TEX colorTemp, fragment.texcoord[0], texture[0], 2D;
206 _mesa_init_instructions(inst + ic, 1);
207 inst[ic].Opcode = OPCODE_TEX;
208 inst[ic].DstReg.File = PROGRAM_TEMPORARY;
209 inst[ic].DstReg.Index = colorTemp;
210 inst[ic].SrcReg[0].File = PROGRAM_INPUT;
211 inst[ic].SrcReg[0].Index = FRAG_ATTRIB_TEX0;
212 inst[ic].TexSrcUnit = 0;
213 inst[ic].TexSrcTarget = TEXTURE_2D_INDEX;
215 fp->Base.InputsRead = (1 << FRAG_ATTRIB_TEX0);
216 fp->Base.OutputsWritten = (1 << FRAG_RESULT_COLOR);
217 fp->Base.SamplersUsed = 0x1; /* sampler 0 (bit 0) is used */
219 if (key->scaleAndBias) {
220 static const gl_state_index scale_state[STATE_LENGTH] =
221 { STATE_INTERNAL, STATE_PT_SCALE, 0, 0, 0 };
222 static const gl_state_index bias_state[STATE_LENGTH] =
223 { STATE_INTERNAL, STATE_PT_BIAS, 0, 0, 0 };
224 GLfloat scale[4], bias[4];
225 GLint scale_p, bias_p;
227 scale[0] = ctx->Pixel.RedScale;
228 scale[1] = ctx->Pixel.GreenScale;
229 scale[2] = ctx->Pixel.BlueScale;
230 scale[3] = ctx->Pixel.AlphaScale;
231 bias[0] = ctx->Pixel.RedBias;
232 bias[1] = ctx->Pixel.GreenBias;
233 bias[2] = ctx->Pixel.BlueBias;
234 bias[3] = ctx->Pixel.AlphaBias;
236 scale_p = _mesa_add_state_reference(params, scale_state);
237 bias_p = _mesa_add_state_reference(params, bias_state);
239 /* MAD colorTemp, colorTemp, scale, bias; */
240 _mesa_init_instructions(inst + ic, 1);
241 inst[ic].Opcode = OPCODE_MAD;
242 inst[ic].DstReg.File = PROGRAM_TEMPORARY;
243 inst[ic].DstReg.Index = colorTemp;
244 inst[ic].SrcReg[0].File = PROGRAM_TEMPORARY;
245 inst[ic].SrcReg[0].Index = colorTemp;
246 inst[ic].SrcReg[1].File = PROGRAM_STATE_VAR;
247 inst[ic].SrcReg[1].Index = scale_p;
248 inst[ic].SrcReg[2].File = PROGRAM_STATE_VAR;
249 inst[ic].SrcReg[2].Index = bias_p;
253 if (key->pixelMaps) {
254 const GLuint temp = 1;
256 /* create the colormap/texture now if not already done */
257 if (!st->pixel_xfer.pixelmap_texture) {
258 st->pixel_xfer.pixelmap_texture = create_color_map_texture(ctx);
259 st->pixel_xfer.pixelmap_sampler_view = st_sampler_view_from_texture(ctx->st->pipe,
260 st->pixel_xfer.pixelmap_texture);
263 /* with a little effort, we can do four pixel map look-ups with
264 * two TEX instructions:
267 /* TEX temp.rg, colorTemp.rgba, texture[1], 2D; */
268 _mesa_init_instructions(inst + ic, 1);
269 inst[ic].Opcode = OPCODE_TEX;
270 inst[ic].DstReg.File = PROGRAM_TEMPORARY;
271 inst[ic].DstReg.Index = temp;
272 inst[ic].DstReg.WriteMask = WRITEMASK_XY; /* write R,G */
273 inst[ic].SrcReg[0].File = PROGRAM_TEMPORARY;
274 inst[ic].SrcReg[0].Index = colorTemp;
275 inst[ic].TexSrcUnit = 1;
276 inst[ic].TexSrcTarget = TEXTURE_2D_INDEX;
279 /* TEX temp.ba, colorTemp.baba, texture[1], 2D; */
280 _mesa_init_instructions(inst + ic, 1);
281 inst[ic].Opcode = OPCODE_TEX;
282 inst[ic].DstReg.File = PROGRAM_TEMPORARY;
283 inst[ic].DstReg.Index = temp;
284 inst[ic].DstReg.WriteMask = WRITEMASK_ZW; /* write B,A */
285 inst[ic].SrcReg[0].File = PROGRAM_TEMPORARY;
286 inst[ic].SrcReg[0].Index = colorTemp;
287 inst[ic].SrcReg[0].Swizzle = MAKE_SWIZZLE4(SWIZZLE_Z, SWIZZLE_W,
288 SWIZZLE_Z, SWIZZLE_W);
289 inst[ic].TexSrcUnit = 1;
290 inst[ic].TexSrcTarget = TEXTURE_2D_INDEX;
293 /* MOV colorTemp, temp; */
294 _mesa_init_instructions(inst + ic, 1);
295 inst[ic].Opcode = OPCODE_MOV;
296 inst[ic].DstReg.File = PROGRAM_TEMPORARY;
297 inst[ic].DstReg.Index = colorTemp;
298 inst[ic].SrcReg[0].File = PROGRAM_TEMPORARY;
299 inst[ic].SrcReg[0].Index = temp;
302 fp->Base.SamplersUsed |= (1 << 1); /* sampler 1 is used */
305 if (key->colorMatrix) {
306 static const gl_state_index row0_state[STATE_LENGTH] =
307 { STATE_COLOR_MATRIX, 0, 0, 0, 0 };
308 static const gl_state_index row1_state[STATE_LENGTH] =
309 { STATE_COLOR_MATRIX, 0, 1, 1, 0 };
310 static const gl_state_index row2_state[STATE_LENGTH] =
311 { STATE_COLOR_MATRIX, 0, 2, 2, 0 };
312 static const gl_state_index row3_state[STATE_LENGTH] =
313 { STATE_COLOR_MATRIX, 0, 3, 3, 0 };
315 GLint row0_p = _mesa_add_state_reference(params, row0_state);
316 GLint row1_p = _mesa_add_state_reference(params, row1_state);
317 GLint row2_p = _mesa_add_state_reference(params, row2_state);
318 GLint row3_p = _mesa_add_state_reference(params, row3_state);
319 const GLuint temp = 1;
321 /* DP4 temp.x, colorTemp, matrow0; */
322 _mesa_init_instructions(inst + ic, 1);
323 inst[ic].Opcode = OPCODE_DP4;
324 inst[ic].DstReg.File = PROGRAM_TEMPORARY;
325 inst[ic].DstReg.Index = temp;
326 inst[ic].DstReg.WriteMask = WRITEMASK_X;
327 inst[ic].SrcReg[0].File = PROGRAM_TEMPORARY;
328 inst[ic].SrcReg[0].Index = colorTemp;
329 inst[ic].SrcReg[1].File = PROGRAM_STATE_VAR;
330 inst[ic].SrcReg[1].Index = row0_p;
333 /* DP4 temp.y, colorTemp, matrow1; */
334 _mesa_init_instructions(inst + ic, 1);
335 inst[ic].Opcode = OPCODE_DP4;
336 inst[ic].DstReg.File = PROGRAM_TEMPORARY;
337 inst[ic].DstReg.Index = temp;
338 inst[ic].DstReg.WriteMask = WRITEMASK_Y;
339 inst[ic].SrcReg[0].File = PROGRAM_TEMPORARY;
340 inst[ic].SrcReg[0].Index = colorTemp;
341 inst[ic].SrcReg[1].File = PROGRAM_STATE_VAR;
342 inst[ic].SrcReg[1].Index = row1_p;
345 /* DP4 temp.z, colorTemp, matrow2; */
346 _mesa_init_instructions(inst + ic, 1);
347 inst[ic].Opcode = OPCODE_DP4;
348 inst[ic].DstReg.File = PROGRAM_TEMPORARY;
349 inst[ic].DstReg.Index = temp;
350 inst[ic].DstReg.WriteMask = WRITEMASK_Z;
351 inst[ic].SrcReg[0].File = PROGRAM_TEMPORARY;
352 inst[ic].SrcReg[0].Index = colorTemp;
353 inst[ic].SrcReg[1].File = PROGRAM_STATE_VAR;
354 inst[ic].SrcReg[1].Index = row2_p;
357 /* DP4 temp.w, colorTemp, matrow3; */
358 _mesa_init_instructions(inst + ic, 1);
359 inst[ic].Opcode = OPCODE_DP4;
360 inst[ic].DstReg.File = PROGRAM_TEMPORARY;
361 inst[ic].DstReg.Index = temp;
362 inst[ic].DstReg.WriteMask = WRITEMASK_W;
363 inst[ic].SrcReg[0].File = PROGRAM_TEMPORARY;
364 inst[ic].SrcReg[0].Index = colorTemp;
365 inst[ic].SrcReg[1].File = PROGRAM_STATE_VAR;
366 inst[ic].SrcReg[1].Index = row3_p;
369 /* MOV colorTemp, temp; */
370 _mesa_init_instructions(inst + ic, 1);
371 inst[ic].Opcode = OPCODE_MOV;
372 inst[ic].DstReg.File = PROGRAM_TEMPORARY;
373 inst[ic].DstReg.Index = colorTemp;
374 inst[ic].SrcReg[0].File = PROGRAM_TEMPORARY;
375 inst[ic].SrcReg[0].Index = temp;
379 if (key->colorMatrixPostScaleBias) {
380 static const gl_state_index scale_state[STATE_LENGTH] =
381 { STATE_INTERNAL, STATE_PT_SCALE, 0, 0, 0 };
382 static const gl_state_index bias_state[STATE_LENGTH] =
383 { STATE_INTERNAL, STATE_PT_BIAS, 0, 0, 0 };
384 GLint scale_param, bias_param;
386 scale_param = _mesa_add_state_reference(params, scale_state);
387 bias_param = _mesa_add_state_reference(params, bias_state);
389 _mesa_init_instructions(inst + ic, 1);
390 inst[ic].Opcode = OPCODE_MAD;
391 inst[ic].DstReg.File = PROGRAM_TEMPORARY;
392 inst[ic].DstReg.Index = colorTemp;
393 inst[ic].SrcReg[0].File = PROGRAM_TEMPORARY;
394 inst[ic].SrcReg[0].Index = colorTemp;
395 inst[ic].SrcReg[1].File = PROGRAM_STATE_VAR;
396 inst[ic].SrcReg[1].Index = scale_param;
397 inst[ic].SrcReg[2].File = PROGRAM_STATE_VAR;
398 inst[ic].SrcReg[2].Index = bias_param;
402 /* Modify last instruction's dst reg to write to result.color */
404 struct prog_instruction *last = &inst[ic - 1];
405 last->DstReg.File = PROGRAM_OUTPUT;
406 last->DstReg.Index = FRAG_RESULT_COLOR;
410 _mesa_init_instructions(inst + ic, 1);
411 inst[ic].Opcode = OPCODE_END;
414 assert(ic <= MAX_INST);
417 fp->Base.Instructions = _mesa_alloc_instructions(ic);
418 if (!fp->Base.Instructions) {
419 _mesa_error(ctx, GL_OUT_OF_MEMORY,
420 "generating pixel transfer program");
424 _mesa_copy_instructions(fp->Base.Instructions, inst, ic);
425 fp->Base.NumInstructions = ic;
426 fp->Base.Parameters = params;
429 printf("========= pixel transfer prog\n");
430 _mesa_print_program(&fp->Base);
431 _mesa_print_parameter_list(fp->Base.Parameters);
440 * Update st->pixel_xfer.program in response to new pixel-transfer state.
443 update_pixel_transfer(struct st_context *st)
445 GLcontext *ctx = st->ctx;
446 struct state_key key;
447 struct gl_fragment_program *fp;
449 make_state_key(st->ctx, &key);
451 fp = (struct gl_fragment_program *)
452 _mesa_search_program_cache(st->pixel_xfer.cache, &key, sizeof(key));
454 fp = get_pixel_transfer_program(st->ctx, &key);
455 _mesa_program_cache_insert(st->ctx, st->pixel_xfer.cache,
456 &key, sizeof(key), &fp->Base);
459 if (ctx->Pixel.MapColorFlag) {
460 load_color_map_texture(ctx, st->pixel_xfer.pixelmap_texture);
462 st->pixel_xfer.pixelmap_enabled = ctx->Pixel.MapColorFlag;
464 st->pixel_xfer.program = (struct st_fragment_program *) fp;
469 const struct st_tracked_state st_update_pixel_transfer = {
470 "st_update_pixel_transfer", /* name */
472 _NEW_PIXEL | _NEW_COLOR_MATRIX, /* mesa */
475 update_pixel_transfer /* update */