1 /**************************************************************************
2 *
3 * Copyright 2007 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 /*
29 * Generate fragment programs to implement pixel transfer ops, such as
30 * scale/bias, colortable, convolution...
31 *
32 * Authors:
33 * Brian Paul
34 */
35
36 #include "main/imports.h"
37 #include "main/image.h"
38 #include "main/macros.h"
39 #include "program/program.h"
40 #include "program/prog_cache.h"
41 #include "program/prog_instruction.h"
42 #include "program/prog_parameter.h"
43 #include "program/prog_print.h"
44
45 #include "st_context.h"
46 #include "st_format.h"
47 #include "st_texture.h"
48
49 #include "pipe/p_screen.h"
50 #include "pipe/p_context.h"
51 #include "util/u_inlines.h"
52 #include "util/u_pack_color.h"
53
54
55 struct state_key
56 {
57 GLuint scaleAndBias:1;
58 GLuint pixelMaps:1;
59
60 #if 0
61 GLfloat Maps[3][256][4];
62 int NumMaps;
63 GLint NumStages;
64 pipeline_stage Stages[STAGE_MAX];
65 GLboolean StagesUsed[STAGE_MAX];
66 GLfloat Scale1[4], Bias1[4];
67 GLfloat Scale2[4], Bias2[4];
68 #endif
69 };
70
71 static void
make_state_key(struct gl_context * ctx,struct state_key * key)72 make_state_key(struct gl_context *ctx, struct state_key *key)
73 {
74 memset(key, 0, sizeof(*key));
75
76 if (ctx->Pixel.RedBias != 0.0 || ctx->Pixel.RedScale != 1.0 ||
77 ctx->Pixel.GreenBias != 0.0 || ctx->Pixel.GreenScale != 1.0 ||
78 ctx->Pixel.BlueBias != 0.0 || ctx->Pixel.BlueScale != 1.0 ||
79 ctx->Pixel.AlphaBias != 0.0 || ctx->Pixel.AlphaScale != 1.0) {
80 key->scaleAndBias = 1;
81 }
82
83 key->pixelMaps = ctx->Pixel.MapColorFlag;
84 }
85
86
87 /**
88 * Update the pixelmap texture with the contents of the R/G/B/A pixel maps.
89 */
90 static void
load_color_map_texture(struct gl_context * ctx,struct pipe_resource * pt)91 load_color_map_texture(struct gl_context *ctx, struct pipe_resource *pt)
92 {
93 struct st_context *st = st_context(ctx);
94 struct pipe_context *pipe = st->pipe;
95 struct pipe_transfer *transfer;
96 const GLuint rSize = ctx->PixelMaps.RtoR.Size;
97 const GLuint gSize = ctx->PixelMaps.GtoG.Size;
98 const GLuint bSize = ctx->PixelMaps.BtoB.Size;
99 const GLuint aSize = ctx->PixelMaps.AtoA.Size;
100 const uint texSize = pt->width0;
101 uint *dest;
102 uint i, j;
103
104 transfer = pipe_get_transfer(pipe,
105 pt, 0, 0, PIPE_TRANSFER_WRITE,
106 0, 0, texSize, texSize);
107 dest = (uint *) pipe_transfer_map(pipe, transfer);
108
109 /* Pack four 1D maps into a 2D texture:
110 * R map is placed horizontally, indexed by S, in channel 0
111 * G map is placed vertically, indexed by T, in channel 1
112 * B map is placed horizontally, indexed by S, in channel 2
113 * A map is placed vertically, indexed by T, in channel 3
114 */
115 for (i = 0; i < texSize; i++) {
116 for (j = 0; j < texSize; j++) {
117 union util_color uc;
118 int k = (i * texSize + j);
119 float rgba[4];
120 rgba[0] = ctx->PixelMaps.RtoR.Map[j * rSize / texSize];
121 rgba[1] = ctx->PixelMaps.GtoG.Map[i * gSize / texSize];
122 rgba[2] = ctx->PixelMaps.BtoB.Map[j * bSize / texSize];
123 rgba[3] = ctx->PixelMaps.AtoA.Map[i * aSize / texSize];
124 util_pack_color(rgba, pt->format, &uc);
125 *(dest + k) = uc.ui;
126 }
127 }
128
129 pipe_transfer_unmap(pipe, transfer);
130 pipe->transfer_destroy(pipe, transfer);
131 }
132
133
134
135 #define MAX_INST 100
136
137 /**
138 * Returns a fragment program which implements the current pixel transfer ops.
139 */
140 static struct gl_fragment_program *
get_pixel_transfer_program(struct gl_context * ctx,const struct state_key * key)141 get_pixel_transfer_program(struct gl_context *ctx, const struct state_key *key)
142 {
143 struct st_context *st = st_context(ctx);
144 struct prog_instruction inst[MAX_INST];
145 struct gl_program_parameter_list *params;
146 struct gl_fragment_program *fp;
147 GLuint ic = 0;
148 const GLuint colorTemp = 0;
149
150 fp = (struct gl_fragment_program *)
151 ctx->Driver.NewProgram(ctx, GL_FRAGMENT_PROGRAM_ARB, 0);
152 if (!fp)
153 return NULL;
154
155 params = _mesa_new_parameter_list();
156
157 /*
158 * Get initial pixel color from the texture.
159 * TEX colorTemp, fragment.texcoord[0], texture[0], 2D;
160 */
161 _mesa_init_instructions(inst + ic, 1);
162 inst[ic].Opcode = OPCODE_TEX;
163 inst[ic].DstReg.File = PROGRAM_TEMPORARY;
164 inst[ic].DstReg.Index = colorTemp;
165 inst[ic].SrcReg[0].File = PROGRAM_INPUT;
166 inst[ic].SrcReg[0].Index = FRAG_ATTRIB_TEX0;
167 inst[ic].TexSrcUnit = 0;
168 inst[ic].TexSrcTarget = TEXTURE_2D_INDEX;
169 ic++;
170 fp->Base.InputsRead = BITFIELD64_BIT(FRAG_ATTRIB_TEX0);
171 fp->Base.OutputsWritten = BITFIELD64_BIT(FRAG_RESULT_COLOR);
172 fp->Base.SamplersUsed = 0x1; /* sampler 0 (bit 0) is used */
173
174 if (key->scaleAndBias) {
175 static const gl_state_index scale_state[STATE_LENGTH] =
176 { STATE_INTERNAL, STATE_PT_SCALE, 0, 0, 0 };
177 static const gl_state_index bias_state[STATE_LENGTH] =
178 { STATE_INTERNAL, STATE_PT_BIAS, 0, 0, 0 };
179 GLint scale_p, bias_p;
180
181 scale_p = _mesa_add_state_reference(params, scale_state);
182 bias_p = _mesa_add_state_reference(params, bias_state);
183
184 /* MAD colorTemp, colorTemp, scale, bias; */
185 _mesa_init_instructions(inst + ic, 1);
186 inst[ic].Opcode = OPCODE_MAD;
187 inst[ic].DstReg.File = PROGRAM_TEMPORARY;
188 inst[ic].DstReg.Index = colorTemp;
189 inst[ic].SrcReg[0].File = PROGRAM_TEMPORARY;
190 inst[ic].SrcReg[0].Index = colorTemp;
191 inst[ic].SrcReg[1].File = PROGRAM_STATE_VAR;
192 inst[ic].SrcReg[1].Index = scale_p;
193 inst[ic].SrcReg[2].File = PROGRAM_STATE_VAR;
194 inst[ic].SrcReg[2].Index = bias_p;
195 ic++;
196 }
197
198 if (key->pixelMaps) {
199 const GLuint temp = 1;
200
201 /* create the colormap/texture now if not already done */
202 if (!st->pixel_xfer.pixelmap_texture) {
203 st->pixel_xfer.pixelmap_texture = st_create_color_map_texture(ctx);
204 st->pixel_xfer.pixelmap_sampler_view =
205 st_create_texture_sampler_view(st->pipe,
206 st->pixel_xfer.pixelmap_texture);
207 }
208
209 /* with a little effort, we can do four pixel map look-ups with
210 * two TEX instructions:
211 */
212
213 /* TEX temp.rg, colorTemp.rgba, texture[1], 2D; */
214 _mesa_init_instructions(inst + ic, 1);
215 inst[ic].Opcode = OPCODE_TEX;
216 inst[ic].DstReg.File = PROGRAM_TEMPORARY;
217 inst[ic].DstReg.Index = temp;
218 inst[ic].DstReg.WriteMask = WRITEMASK_XY; /* write R,G */
219 inst[ic].SrcReg[0].File = PROGRAM_TEMPORARY;
220 inst[ic].SrcReg[0].Index = colorTemp;
221 inst[ic].TexSrcUnit = 1;
222 inst[ic].TexSrcTarget = TEXTURE_2D_INDEX;
223 ic++;
224
225 /* TEX temp.ba, colorTemp.baba, texture[1], 2D; */
226 _mesa_init_instructions(inst + ic, 1);
227 inst[ic].Opcode = OPCODE_TEX;
228 inst[ic].DstReg.File = PROGRAM_TEMPORARY;
229 inst[ic].DstReg.Index = temp;
230 inst[ic].DstReg.WriteMask = WRITEMASK_ZW; /* write B,A */
231 inst[ic].SrcReg[0].File = PROGRAM_TEMPORARY;
232 inst[ic].SrcReg[0].Index = colorTemp;
233 inst[ic].SrcReg[0].Swizzle = MAKE_SWIZZLE4(SWIZZLE_Z, SWIZZLE_W,
234 SWIZZLE_Z, SWIZZLE_W);
235 inst[ic].TexSrcUnit = 1;
236 inst[ic].TexSrcTarget = TEXTURE_2D_INDEX;
237 ic++;
238
239 /* MOV colorTemp, temp; */
240 _mesa_init_instructions(inst + ic, 1);
241 inst[ic].Opcode = OPCODE_MOV;
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 = temp;
246 ic++;
247
248 fp->Base.SamplersUsed |= (1 << 1); /* sampler 1 is used */
249 }
250
251 /* Modify last instruction's dst reg to write to result.color */
252 {
253 struct prog_instruction *last = &inst[ic - 1];
254 last->DstReg.File = PROGRAM_OUTPUT;
255 last->DstReg.Index = FRAG_RESULT_COLOR;
256 }
257
258 /* END; */
259 _mesa_init_instructions(inst + ic, 1);
260 inst[ic].Opcode = OPCODE_END;
261 ic++;
262
263 assert(ic <= MAX_INST);
264
265
266 fp->Base.Instructions = _mesa_alloc_instructions(ic);
267 if (!fp->Base.Instructions) {
268 _mesa_error(ctx, GL_OUT_OF_MEMORY,
269 "generating pixel transfer program");
270 _mesa_free_parameter_list(params);
271 return NULL;
272 }
273
274 _mesa_copy_instructions(fp->Base.Instructions, inst, ic);
275 fp->Base.NumInstructions = ic;
276 fp->Base.Parameters = params;
277
278 #if 0
279 printf("========= pixel transfer prog\n");
280 _mesa_print_program(&fp->Base);
281 _mesa_print_parameter_list(fp->Base.Parameters);
282 #endif
283
284 return fp;
285 }
286
287
288
289 /**
290 * Update st->pixel_xfer.program in response to new pixel-transfer state.
291 */
292 static void
update_pixel_transfer(struct st_context * st)293 update_pixel_transfer(struct st_context *st)
294 {
295 struct gl_context *ctx = st->ctx;
296 struct state_key key;
297 struct gl_fragment_program *fp;
298
299 make_state_key(st->ctx, &key);
300
301 fp = (struct gl_fragment_program *)
302 _mesa_search_program_cache(st->pixel_xfer.cache, &key, sizeof(key));
303 if (!fp) {
304 fp = get_pixel_transfer_program(st->ctx, &key);
305 _mesa_program_cache_insert(st->ctx, st->pixel_xfer.cache,
306 &key, sizeof(key), &fp->Base);
307 }
308
309 if (ctx->Pixel.MapColorFlag) {
310 load_color_map_texture(ctx, st->pixel_xfer.pixelmap_texture);
311 }
312 st->pixel_xfer.pixelmap_enabled = ctx->Pixel.MapColorFlag;
313
314 st->pixel_xfer.program = (struct st_fragment_program *) fp;
315 }
316
317
318
319 const struct st_tracked_state st_update_pixel_transfer = {
320 "st_update_pixel_transfer", /* name */
321 { /* dirty */
322 _NEW_PIXEL, /* mesa */
323 0, /* st */
324 },
325 update_pixel_transfer /* update */
326 };
327