summaryrefslogtreecommitdiff
path: root/src/mesa/state_tracker/st_atom_pixeltransfer.c
blob: 95b706cb96c7ca1f42aea545097ef64b13d89c72 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
/**************************************************************************
 * 
 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
 * All Rights Reserved.
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sub license, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 * 
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial portions
 * of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 * 
 **************************************************************************/

/*
 * Generate fragment programs to implement pixel transfer ops, such as
 * scale/bias, colortable, convolution...
 *
 * Authors:
 *   Brian Paul
 */

#include "main/imports.h"
#include "main/image.h"
#include "main/macros.h"
#include "program/program.h"
#include "program/prog_cache.h"
#include "program/prog_instruction.h"
#include "program/prog_parameter.h"
#include "program/prog_print.h"

#include "st_context.h"
#include "st_format.h"
#include "st_texture.h"

#include "pipe/p_screen.h"
#include "pipe/p_context.h"
#include "util/u_inlines.h"
#include "util/u_pack_color.h"


struct state_key
{
   GLuint scaleAndBias:1;
   GLuint pixelMaps:1;

#if 0
   GLfloat Maps[3][256][4];
   int NumMaps;
   GLint NumStages;
   pipeline_stage Stages[STAGE_MAX];
   GLboolean StagesUsed[STAGE_MAX];
   GLfloat Scale1[4], Bias1[4];
   GLfloat Scale2[4], Bias2[4];
#endif
};

static void
make_state_key(struct gl_context *ctx,  struct state_key *key)
{
   memset(key, 0, sizeof(*key));

   if (ctx->Pixel.RedBias != 0.0 || ctx->Pixel.RedScale != 1.0 ||
       ctx->Pixel.GreenBias != 0.0 || ctx->Pixel.GreenScale != 1.0 ||
       ctx->Pixel.BlueBias != 0.0 || ctx->Pixel.BlueScale != 1.0 ||
       ctx->Pixel.AlphaBias != 0.0 || ctx->Pixel.AlphaScale != 1.0) {
      key->scaleAndBias = 1;
   }

   key->pixelMaps = ctx->Pixel.MapColorFlag;
}


static struct pipe_resource *
create_color_map_texture(struct gl_context *ctx)
{
   struct st_context *st = st_context(ctx);
   struct pipe_context *pipe = st->pipe;
   struct pipe_resource *pt;
   enum pipe_format format;
   const uint texSize = 256; /* simple, and usually perfect */

   /* find an RGBA texture format */
   format = st_choose_format(pipe->screen, GL_RGBA,
                             PIPE_TEXTURE_2D, 0, PIPE_BIND_SAMPLER_VIEW);

   /* create texture for color map/table */
   pt = st_texture_create(st, PIPE_TEXTURE_2D, format, 0,
                          texSize, texSize, 1, 1, PIPE_BIND_SAMPLER_VIEW);
   return pt;
}


/**
 * Update the pixelmap texture with the contents of the R/G/B/A pixel maps.
 */
static void
load_color_map_texture(struct gl_context *ctx, struct pipe_resource *pt)
{
   struct st_context *st = st_context(ctx);
   struct pipe_context *pipe = st->pipe;
   struct pipe_transfer *transfer;
   const GLuint rSize = ctx->PixelMaps.RtoR.Size;
   const GLuint gSize = ctx->PixelMaps.GtoG.Size;
   const GLuint bSize = ctx->PixelMaps.BtoB.Size;
   const GLuint aSize = ctx->PixelMaps.AtoA.Size;
   const uint texSize = pt->width0;
   uint *dest;
   uint i, j;

   transfer = pipe_get_transfer(pipe,
                                pt, 0, 0, PIPE_TRANSFER_WRITE,
                                0, 0, texSize, texSize);
   dest = (uint *) pipe_transfer_map(pipe, transfer);

   /* Pack four 1D maps into a 2D texture:
    * R map is placed horizontally, indexed by S, in channel 0
    * G map is placed vertically, indexed by T, in channel 1
    * B map is placed horizontally, indexed by S, in channel 2
    * A map is placed vertically, indexed by T, in channel 3
    */
   for (i = 0; i < texSize; i++) {
      for (j = 0; j < texSize; j++) {
         union util_color uc;
         int k = (i * texSize + j);
         ubyte r = ctx->PixelMaps.RtoR.Map8[j * rSize / texSize];
         ubyte g = ctx->PixelMaps.GtoG.Map8[i * gSize / texSize];
         ubyte b = ctx->PixelMaps.BtoB.Map8[j * bSize / texSize];
         ubyte a = ctx->PixelMaps.AtoA.Map8[i * aSize / texSize];
         util_pack_color_ub(r, g, b, a, pt->format, &uc);
         *(dest + k) = uc.ui;
      }
   }

   pipe_transfer_unmap(pipe, transfer);
   pipe->transfer_destroy(pipe, transfer);
}



#define MAX_INST 100

/**
 * Returns a fragment program which implements the current pixel transfer ops.
 */
static struct gl_fragment_program *
get_pixel_transfer_program(struct gl_context *ctx, const struct state_key *key)
{
   struct st_context *st = st_context(ctx);
   struct prog_instruction inst[MAX_INST];
   struct gl_program_parameter_list *params;
   struct gl_fragment_program *fp;
   GLuint ic = 0;
   const GLuint colorTemp = 0;

   fp = (struct gl_fragment_program *)
      ctx->Driver.NewProgram(ctx, GL_FRAGMENT_PROGRAM_ARB, 0);
   if (!fp)
      return NULL;

   params = _mesa_new_parameter_list();

   /*
    * Get initial pixel color from the texture.
    * TEX colorTemp, fragment.texcoord[0], texture[0], 2D;
    */
   _mesa_init_instructions(inst + ic, 1);
   inst[ic].Opcode = OPCODE_TEX;
   inst[ic].DstReg.File = PROGRAM_TEMPORARY;
   inst[ic].DstReg.Index = colorTemp;
   inst[ic].SrcReg[0].File = PROGRAM_INPUT;
   inst[ic].SrcReg[0].Index = FRAG_ATTRIB_TEX0;
   inst[ic].TexSrcUnit = 0;
   inst[ic].TexSrcTarget = TEXTURE_2D_INDEX;
   ic++;
   fp->Base.InputsRead = (1 << FRAG_ATTRIB_TEX0);
   fp->Base.OutputsWritten = BITFIELD64_BIT(FRAG_RESULT_COLOR);
   fp->Base.SamplersUsed = 0x1;  /* sampler 0 (bit 0) is used */

   if (key->scaleAndBias) {
      static const gl_state_index scale_state[STATE_LENGTH] =
         { STATE_INTERNAL, STATE_PT_SCALE, 0, 0, 0 };
      static const gl_state_index bias_state[STATE_LENGTH] =
         { STATE_INTERNAL, STATE_PT_BIAS, 0, 0, 0 };
      GLint scale_p, bias_p;

      scale_p = _mesa_add_state_reference(params, scale_state);
      bias_p = _mesa_add_state_reference(params, bias_state);

      /* MAD colorTemp, colorTemp, scale, bias; */
      _mesa_init_instructions(inst + ic, 1);
      inst[ic].Opcode = OPCODE_MAD;
      inst[ic].DstReg.File = PROGRAM_TEMPORARY;
      inst[ic].DstReg.Index = colorTemp;
      inst[ic].SrcReg[0].File = PROGRAM_TEMPORARY;
      inst[ic].SrcReg[0].Index = colorTemp;
      inst[ic].SrcReg[1].File = PROGRAM_STATE_VAR;
      inst[ic].SrcReg[1].Index = scale_p;
      inst[ic].SrcReg[2].File = PROGRAM_STATE_VAR;
      inst[ic].SrcReg[2].Index = bias_p;
      ic++;
   }

   if (key->pixelMaps) {
      const GLuint temp = 1;

      /* create the colormap/texture now if not already done */
      if (!st->pixel_xfer.pixelmap_texture) {
         st->pixel_xfer.pixelmap_texture = create_color_map_texture(ctx);
         st->pixel_xfer.pixelmap_sampler_view =
            st_create_texture_sampler_view(st->pipe,
                                           st->pixel_xfer.pixelmap_texture);
      }

      /* with a little effort, we can do four pixel map look-ups with
       * two TEX instructions:
       */

      /* TEX temp.rg, colorTemp.rgba, texture[1], 2D; */
      _mesa_init_instructions(inst + ic, 1);
      inst[ic].Opcode = OPCODE_TEX;
      inst[ic].DstReg.File = PROGRAM_TEMPORARY;
      inst[ic].DstReg.Index = temp;
      inst[ic].DstReg.WriteMask = WRITEMASK_XY; /* write R,G */
      inst[ic].SrcReg[0].File = PROGRAM_TEMPORARY;
      inst[ic].SrcReg[0].Index = colorTemp;
      inst[ic].TexSrcUnit = 1;
      inst[ic].TexSrcTarget = TEXTURE_2D_INDEX;
      ic++;

      /* TEX temp.ba, colorTemp.baba, texture[1], 2D; */
      _mesa_init_instructions(inst + ic, 1);
      inst[ic].Opcode = OPCODE_TEX;
      inst[ic].DstReg.File = PROGRAM_TEMPORARY;
      inst[ic].DstReg.Index = temp;
      inst[ic].DstReg.WriteMask = WRITEMASK_ZW; /* write B,A */
      inst[ic].SrcReg[0].File = PROGRAM_TEMPORARY;
      inst[ic].SrcReg[0].Index = colorTemp;
      inst[ic].SrcReg[0].Swizzle = MAKE_SWIZZLE4(SWIZZLE_Z, SWIZZLE_W,
                                                 SWIZZLE_Z, SWIZZLE_W);
      inst[ic].TexSrcUnit = 1;
      inst[ic].TexSrcTarget = TEXTURE_2D_INDEX;
      ic++;

      /* MOV colorTemp, temp; */
      _mesa_init_instructions(inst + ic, 1);
      inst[ic].Opcode = OPCODE_MOV;
      inst[ic].DstReg.File = PROGRAM_TEMPORARY;
      inst[ic].DstReg.Index = colorTemp;
      inst[ic].SrcReg[0].File = PROGRAM_TEMPORARY;
      inst[ic].SrcReg[0].Index = temp;
      ic++;

      fp->Base.SamplersUsed |= (1 << 1);  /* sampler 1 is used */
   }

   /* Modify last instruction's dst reg to write to result.color */
   {
      struct prog_instruction *last = &inst[ic - 1];
      last->DstReg.File = PROGRAM_OUTPUT;
      last->DstReg.Index = FRAG_RESULT_COLOR;
   }

   /* END; */
   _mesa_init_instructions(inst + ic, 1);
   inst[ic].Opcode = OPCODE_END;
   ic++;

   assert(ic <= MAX_INST);


   fp->Base.Instructions = _mesa_alloc_instructions(ic);
   if (!fp->Base.Instructions) {
      _mesa_error(ctx, GL_OUT_OF_MEMORY,
                  "generating pixel transfer program");
      return NULL;
   }

   _mesa_copy_instructions(fp->Base.Instructions, inst, ic);
   fp->Base.NumInstructions = ic;
   fp->Base.Parameters = params;

#if 0
   printf("========= pixel transfer prog\n");
   _mesa_print_program(&fp->Base);
   _mesa_print_parameter_list(fp->Base.Parameters);
#endif

   return fp;
}



/**
 * Update st->pixel_xfer.program in response to new pixel-transfer state.
 */
static void
update_pixel_transfer(struct st_context *st)
{
   struct gl_context *ctx = st->ctx;
   struct state_key key;
   struct gl_fragment_program *fp;

   make_state_key(st->ctx, &key);

   fp = (struct gl_fragment_program *)
      _mesa_search_program_cache(st->pixel_xfer.cache, &key, sizeof(key));
   if (!fp) {
      fp = get_pixel_transfer_program(st->ctx, &key);
      _mesa_program_cache_insert(st->ctx, st->pixel_xfer.cache,
                                 &key, sizeof(key), &fp->Base);
   }

   if (ctx->Pixel.MapColorFlag) {
      load_color_map_texture(ctx, st->pixel_xfer.pixelmap_texture);
   }
   st->pixel_xfer.pixelmap_enabled = ctx->Pixel.MapColorFlag;

   st->pixel_xfer.program = (struct st_fragment_program *) fp;
}



const struct st_tracked_state st_update_pixel_transfer = {
   "st_update_pixel_transfer",				/* name */
   {							/* dirty */
      _NEW_PIXEL,					/* mesa */
      0,						/* st */
   },
   update_pixel_transfer				/* update */
};