summaryrefslogtreecommitdiff
path: root/src/mesa/drivers/dri/intel/intel_pixel_bitmap.c
blob: d137aef13d23d6e5f1e952f8b5b775cdb7d387af (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
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
/**************************************************************************
 * 
 * Copyright 2006 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 portionsalloc
 * 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.
 * 
 **************************************************************************/

#include "main/glheader.h"
#include "main/enums.h"
#include "main/image.h"
#include "main/colormac.h"
#include "main/mtypes.h"
#include "main/macros.h"
#include "main/bufferobj.h"
#include "main/pixelstore.h"
#include "main/state.h"
#include "main/teximage.h"
#include "main/texenv.h"
#include "main/texobj.h"
#include "main/texstate.h"
#include "main/texparam.h"
#include "main/varray.h"
#include "main/attrib.h"
#include "main/enable.h"
#include "shader/arbprogram.h"
#include "glapi/dispatch.h"
#include "swrast/swrast.h"

#include "intel_screen.h"
#include "intel_context.h"
#include "intel_batchbuffer.h"
#include "intel_blit.h"
#include "intel_regions.h"
#include "intel_buffer_objects.h"
#include "intel_buffers.h"
#include "intel_pixel.h"
#include "intel_reg.h"


#define FILE_DEBUG_FLAG DEBUG_PIXEL


/* Unlike the other intel_pixel_* functions, the expectation here is
 * that the incoming data is not in a PBO.  With the XY_TEXT blit
 * method, there's no benefit haveing it in a PBO, but we could
 * implement a path based on XY_MONO_SRC_COPY_BLIT which might benefit
 * PBO bitmaps.  I think they are probably pretty rare though - I
 * wonder if Xgl uses them?
 */
static const GLubyte *map_pbo( GLcontext *ctx,
			       GLsizei width, GLsizei height,
			       const struct gl_pixelstore_attrib *unpack,
			       const GLubyte *bitmap )
{
   GLubyte *buf;

   if (!_mesa_validate_pbo_access(2, unpack, width, height, 1,
				  GL_COLOR_INDEX, GL_BITMAP,
				  (GLvoid *) bitmap)) {
      _mesa_error(ctx, GL_INVALID_OPERATION,"glBitmap(invalid PBO access)");
      return NULL;
   }

   buf = (GLubyte *) ctx->Driver.MapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT,
					   GL_READ_ONLY_ARB,
					   unpack->BufferObj);
   if (!buf) {
      _mesa_error(ctx, GL_INVALID_OPERATION, "glBitmap(PBO is mapped)");
      return NULL;
   }

   return ADD_POINTERS(buf, bitmap);
}

static GLboolean test_bit( const GLubyte *src,
			    GLuint bit )
{
   return (src[bit/8] & (1<<(bit % 8))) ? 1 : 0;
}

static GLboolean test_msb_bit(const GLubyte *src, GLuint bit)
{
   return (src[bit/8] & (1<<(7 - (bit % 8)))) ? 1 : 0;
}

static void set_bit( GLubyte *dest,
			  GLuint bit )
{
   dest[bit/8] |= 1 << (bit % 8);
}

/* Extract a rectangle's worth of data from the bitmap.  Called
 * per-cliprect.
 */
static GLuint get_bitmap_rect(GLsizei width, GLsizei height,
			      const struct gl_pixelstore_attrib *unpack,
			      const GLubyte *bitmap,
			      GLuint x, GLuint y, 
			      GLuint w, GLuint h,
			      GLubyte *dest,
			      GLuint row_align,
			      GLboolean invert)
{
   GLuint src_offset = (x + unpack->SkipPixels) & 0x7;
   GLuint mask = unpack->LsbFirst ? 0 : 7;
   GLuint bit = 0;
   GLint row, col;
   GLint first, last;
   GLint incr;
   GLuint count = 0;

   if (INTEL_DEBUG & DEBUG_PIXEL)
      _mesa_printf("%s %d,%d %dx%d bitmap %dx%d skip %d src_offset %d mask %d\n",
		   __FUNCTION__, x,y,w,h,width,height,unpack->SkipPixels, src_offset, mask);

   if (invert) {
      first = h-1;
      last = 0;
      incr = -1;
   }
   else {
      first = 0;
      last = h-1;
      incr = 1;
   }

   /* Require that dest be pre-zero'd.
    */
   for (row = first; row != (last+incr); row += incr) {
      const GLubyte *rowsrc = _mesa_image_address2d(unpack, bitmap, 
						    width, height, 
						    GL_COLOR_INDEX, GL_BITMAP, 
						    y + row, x);

      for (col = 0; col < w; col++, bit++) {
	 if (test_bit(rowsrc, (col + src_offset) ^ mask)) {
	    set_bit(dest, bit ^ 7);
	    count++;
	 }
      }

      if (row_align)
	 bit = ALIGN(bit, row_align);
   }

   return count;
}

/**
 * Returns the low Y value of the vertical range given, flipped according to
 * whether the framebuffer is or not.
 */
static inline int
y_flip(struct gl_framebuffer *fb, int y, int height)
{
   if (fb->Name != 0)
      return y;
   else
      return fb->Height - y - height;
}

/*
 * Render a bitmap.
 */
static GLboolean
do_blit_bitmap( GLcontext *ctx, 
		GLint dstx, GLint dsty,
		GLsizei width, GLsizei height,
		const struct gl_pixelstore_attrib *unpack,
		const GLubyte *bitmap )
{
   struct intel_context *intel = intel_context(ctx);
   struct intel_region *dst = intel_drawbuf_region(intel);
   struct gl_framebuffer *fb = ctx->DrawBuffer;
   GLfloat tmpColor[4];
   GLubyte ubcolor[4];
   GLuint color8888, color565;
   unsigned int num_cliprects;
   drm_clip_rect_t *cliprects;
   int x_off, y_off;
   GLsizei bitmap_width = width;
   GLsizei bitmap_height = height;

   /* Update draw buffer bounds */
   _mesa_update_state(ctx);

   if (ctx->Depth.Test) {
      /* The blit path produces incorrect results when depth testing is on.
       * It seems the blit Z coord is always 1.0 (the far plane) so fragments
       * will likely be obscured by other, closer geometry.
       */
      return GL_FALSE;
   }

   if (!dst)
       return GL_FALSE;

   if (unpack->BufferObj->Name) {
      bitmap = map_pbo(ctx, width, height, unpack, bitmap);
      if (bitmap == NULL)
	 return GL_TRUE;	/* even though this is an error, we're done */
   }

   COPY_4V(tmpColor, ctx->Current.RasterColor);

   if (NEED_SECONDARY_COLOR(ctx)) {
       ADD_3V(tmpColor, tmpColor, ctx->Current.RasterSecondaryColor);
   }

   UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[0], tmpColor[0]);
   UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[1], tmpColor[1]);
   UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[2], tmpColor[2]);
   UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[3], tmpColor[3]);

   color8888 = INTEL_PACKCOLOR8888(ubcolor[0], ubcolor[1], ubcolor[2], ubcolor[3]);
   color565 = INTEL_PACKCOLOR565(ubcolor[0], ubcolor[1], ubcolor[2]);

   if (!intel_check_blit_fragment_ops(ctx, tmpColor[3] == 1.0F))
      return GL_FALSE;

   LOCK_HARDWARE(intel);

   intel_get_cliprects(intel, &cliprects, &num_cliprects, &x_off, &y_off);
   if (num_cliprects != 0) {
      GLuint i;
      GLint orig_dstx = dstx;
      GLint orig_dsty = dsty;

      /* Clip to buffer bounds and scissor. */
      if (!_mesa_clip_to_region(fb->_Xmin, fb->_Ymin,
				fb->_Xmax, fb->_Ymax,
				&dstx, &dsty, &width, &height))
            goto out;

      dstx = x_off + dstx;
      dsty = y_off + y_flip(fb, dsty, height);

      for (i = 0; i < num_cliprects; i++) {
	 int box_x, box_y, box_w, box_h;
	 GLint px, py;
	 GLuint stipple[32];  

	 box_x = dstx;
	 box_y = dsty;
	 box_w = width;
	 box_h = height;

	 /* Clip to drawable cliprect */
         if (!_mesa_clip_to_region(cliprects[i].x1,
				   cliprects[i].y1,
				   cliprects[i].x2,
				   cliprects[i].y2,
				   &box_x, &box_y, &box_w, &box_h))
	    continue;

#define DY 32
#define DX 32

	 /* Then, finally, chop it all into chunks that can be
	  * digested by hardware:
	  */
	 for (py = 0; py < box_h; py += DY) { 
	    for (px = 0; px < box_w; px += DX) { 
	       int h = MIN2(DY, box_h - py);
	       int w = MIN2(DX, box_w - px); 
	       GLuint sz = ALIGN(ALIGN(w,8) * h, 64)/8;
	       GLenum logic_op = ctx->Color.ColorLogicOpEnabled ?
		  ctx->Color.LogicOp : GL_COPY;

	       assert(sz <= sizeof(stipple));
	       memset(stipple, 0, sz);

	       /* May need to adjust this when padding has been introduced in
		* sz above:
		*
		* Have to translate destination coordinates back into source
		* coordinates.
		*/
	       if (get_bitmap_rect(bitmap_width, bitmap_height, unpack,
				   bitmap,
				   -orig_dstx + (box_x + px - x_off),
				   -orig_dsty + y_flip(fb,
						       box_y + py - y_off, h),
				   w, h,
				   (GLubyte *)stipple,
				   8,
				   fb->Name == 0 ? GL_TRUE : GL_FALSE) == 0)
		  continue;

	       /* 
		*/
	       intelEmitImmediateColorExpandBlit( intel,
						  dst->cpp,
						  (GLubyte *)stipple, 
						  sz,
						  (dst->cpp == 2) ? color565 : color8888,
						  dst->pitch,
						  dst->buffer,
						  0,
						  dst->tiling,
						  box_x + px,
						  box_y + py,
						  w, h,
						  logic_op);
	    } 
	 } 
      }
   }
out:
   UNLOCK_HARDWARE(intel);

   if (INTEL_DEBUG & DEBUG_SYNC)
      intel_batchbuffer_flush(intel->batch);

   if (unpack->BufferObj->Name) {
      /* done with PBO so unmap it now */
      ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT,
                              unpack->BufferObj);
   }

   return GL_TRUE;
}

static GLboolean
intel_texture_bitmap(GLcontext * ctx,
		     GLint dst_x, GLint dst_y,
		     GLsizei width, GLsizei height,
		     const struct gl_pixelstore_attrib *unpack,
		     const GLubyte *bitmap)
{
   struct intel_context *intel = intel_context(ctx);
   static const char *fp =
      "!!ARBfp1.0\n"
      "TEMP val;\n"
      "PARAM color=program.local[0];\n"
      "TEX val, fragment.texcoord[0], texture[0], 2D;\n"
      "ADD val, val.wwww, {-.5, -.5, -.5, -.5};\n"
      "KIL val;\n"
      "MOV result.color, color;\n"
      "END\n";
   GLuint texname;
   GLfloat vertices[4][4];
   GLfloat texcoords[4][2];
   GLint old_active_texture;
   GLubyte *unpacked_bitmap;
   GLubyte *a8_bitmap;
   int x, y;
   GLfloat dst_z;

   /* We need a fragment program for the KIL effect */
   if (!ctx->Extensions.ARB_fragment_program ||
       !ctx->Extensions.ARB_vertex_program) {
      if (INTEL_DEBUG & DEBUG_FALLBACKS)
	 fprintf(stderr,
		 "glBitmap fallback: No fragment/vertex program support\n");
      return GL_FALSE;
   }

   /* We're going to mess with texturing with no regard to existing texture
    * state, so if there is some set up we have to bail.
    */
   if (ctx->Texture._EnabledUnits != 0) {
      if (INTEL_DEBUG & DEBUG_FALLBACKS)
	 fprintf(stderr, "glBitmap fallback: texturing enabled\n");
      return GL_FALSE;
   }

   /* Can't do textured DrawPixels with a fragment program, unless we were
    * to generate a new program that sampled our texture and put the results
    * in the fragment color before the user's program started.
    */
   if (ctx->FragmentProgram.Enabled) {
      if (INTEL_DEBUG & DEBUG_FALLBACKS)
	 fprintf(stderr, "glBitmap fallback: fragment program enabled\n");
      return GL_FALSE;
   }

   if (ctx->VertexProgram.Enabled) {
      if (INTEL_DEBUG & DEBUG_FALLBACKS)
	 fprintf(stderr, "glBitmap fallback: vertex program enabled\n");
      return GL_FALSE;
   }

   if (!ctx->Extensions.ARB_texture_non_power_of_two &&
       (!is_power_of_two(width) || !is_power_of_two(height))) {
      if (INTEL_DEBUG & DEBUG_FALLBACKS)
	 fprintf(stderr,
		 "glBitmap() fallback: NPOT texture\n");
      return GL_FALSE;
   }

   if (ctx->Fog.Enabled) {
      if (INTEL_DEBUG & DEBUG_FALLBACKS)
	 fprintf(stderr, "glBitmap() fallback: fog\n");
      return GL_FALSE;
   }

   /* Check that we can load in a texture this big. */
   if (width > (1 << (ctx->Const.MaxTextureLevels - 1)) ||
       height > (1 << (ctx->Const.MaxTextureLevels - 1))) {
      if (INTEL_DEBUG & DEBUG_FALLBACKS)
	 fprintf(stderr, "glBitmap fallback: bitmap too large (%dx%d)\n",
		 width, height);
      return GL_FALSE;
   }

   /* Convert the A1 bitmap to an A8 format suitable for glTexImage */
   if (unpack->BufferObj->Name) {
      bitmap = map_pbo(ctx, width, height, unpack, bitmap);
      if (bitmap == NULL)
	 return GL_TRUE;	/* even though this is an error, we're done */
   }
   unpacked_bitmap = _mesa_unpack_bitmap(width, height, bitmap,
					 unpack);
   a8_bitmap = _mesa_calloc(width * height);
   for (y = 0; y < height; y++) {
      for (x = 0; x < width; x++) {
	 if (test_msb_bit(unpacked_bitmap, ALIGN(width, 8) * y + x))
	    a8_bitmap[y * width + x] = 0xff;
      }
   }
   _mesa_free(unpacked_bitmap);
   if (unpack->BufferObj->Name) {
      /* done with PBO so unmap it now */
      ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT,
                              unpack->BufferObj);
   }

   /* Save GL state before we start setting up our drawing */
   _mesa_PushAttrib(GL_ENABLE_BIT | GL_CURRENT_BIT |
		    GL_VIEWPORT_BIT);
   _mesa_PushClientAttrib(GL_CLIENT_VERTEX_ARRAY_BIT |
			  GL_CLIENT_PIXEL_STORE_BIT);
   old_active_texture = ctx->Texture.CurrentUnit;

   _mesa_Disable(GL_POLYGON_STIPPLE);

   /* Upload our bitmap data to an alpha texture */
   _mesa_ActiveTextureARB(GL_TEXTURE0_ARB);
   _mesa_Enable(GL_TEXTURE_2D);
   _mesa_GenTextures(1, &texname);
   _mesa_BindTexture(GL_TEXTURE_2D, texname);
   _mesa_TexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
   _mesa_TexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);

   _mesa_PixelStorei(GL_UNPACK_SWAP_BYTES, GL_FALSE);
   _mesa_PixelStorei(GL_UNPACK_LSB_FIRST, GL_FALSE);
   _mesa_PixelStorei(GL_UNPACK_ROW_LENGTH, 0);
   _mesa_PixelStorei(GL_UNPACK_SKIP_PIXELS, 0);
   _mesa_PixelStorei(GL_UNPACK_SKIP_ROWS, 0);
   _mesa_PixelStorei(GL_UNPACK_ALIGNMENT, 1);
   _mesa_TexImage2D(GL_TEXTURE_2D, 0, GL_ALPHA, width, height, 0,
		    GL_ALPHA, GL_UNSIGNED_BYTE, a8_bitmap);
   _mesa_free(a8_bitmap);

   intel_meta_set_fragment_program(intel, &intel->meta.bitmap_fp, fp);
   _mesa_ProgramLocalParameter4fvARB(GL_FRAGMENT_PROGRAM_ARB, 0,
				     ctx->Current.RasterColor);
   intel_meta_set_passthrough_vertex_program(intel);
   intel_meta_set_passthrough_transform(intel);

   /* convert rasterpos Z from [0,1] to NDC coord in [-1,1] */
   dst_z = -1.0 + 2.0 * ctx->Current.RasterPos[2];

   vertices[0][0] = dst_x;
   vertices[0][1] = dst_y;
   vertices[0][2] = dst_z;
   vertices[0][3] = 1.0;
   vertices[1][0] = dst_x + width;
   vertices[1][1] = dst_y;
   vertices[1][2] = dst_z;
   vertices[1][3] = 1.0;
   vertices[2][0] = dst_x + width;
   vertices[2][1] = dst_y + height;
   vertices[2][2] = dst_z;
   vertices[2][3] = 1.0;
   vertices[3][0] = dst_x;
   vertices[3][1] = dst_y + height;
   vertices[3][2] = dst_z;
   vertices[3][3] = 1.0;

   texcoords[0][0] = 0.0;
   texcoords[0][1] = 0.0;
   texcoords[1][0] = 1.0;
   texcoords[1][1] = 0.0;
   texcoords[2][0] = 1.0;
   texcoords[2][1] = 1.0;
   texcoords[3][0] = 0.0;
   texcoords[3][1] = 1.0;

   _mesa_VertexPointer(4, GL_FLOAT, 4 * sizeof(GLfloat), &vertices);
   _mesa_ClientActiveTextureARB(GL_TEXTURE0);
   _mesa_TexCoordPointer(2, GL_FLOAT, 2 * sizeof(GLfloat), &texcoords);
   _mesa_Enable(GL_VERTEX_ARRAY);
   _mesa_Enable(GL_TEXTURE_COORD_ARRAY);
   _mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4);

   intel_meta_restore_transform(intel);
   intel_meta_restore_fragment_program(intel);
   intel_meta_restore_vertex_program(intel);

   _mesa_PopClientAttrib();
   _mesa_Disable(GL_TEXTURE_2D); /* asserted that it was disabled at entry */
   _mesa_ActiveTextureARB(GL_TEXTURE0_ARB + old_active_texture);
   _mesa_PopAttrib();

   _mesa_DeleteTextures(1, &texname);

   return GL_TRUE;
}

/* There are a large number of possible ways to implement bitmap on
 * this hardware, most of them have some sort of drawback.  Here are a
 * few that spring to mind:
 * 
 * Blit:
 *    - XY_MONO_SRC_BLT_CMD
 *         - use XY_SETUP_CLIP_BLT for cliprect clipping.
 *    - XY_TEXT_BLT
 *    - XY_TEXT_IMMEDIATE_BLT
 *         - blit per cliprect, subject to maximum immediate data size.
 *    - XY_COLOR_BLT 
 *         - per pixel or run of pixels
 *    - XY_PIXEL_BLT
 *         - good for sparse bitmaps
 *
 * 3D engine:
 *    - Point per pixel
 *    - Translate bitmap to an alpha texture and render as a quad
 *    - Chop bitmap up into 32x32 squares and render w/polygon stipple.
 */
void
intelBitmap(GLcontext * ctx,
	    GLint x, GLint y,
	    GLsizei width, GLsizei height,
	    const struct gl_pixelstore_attrib *unpack,
	    const GLubyte * pixels)
{
   if (do_blit_bitmap(ctx, x, y, width, height,
                          unpack, pixels))
      return;

   if (intel_texture_bitmap(ctx, x, y, width, height,
			    unpack, pixels))
      return;

   if (INTEL_DEBUG & DEBUG_PIXEL)
      _mesa_printf("%s: fallback to swrast\n", __FUNCTION__);

   _swrast_Bitmap(ctx, x, y, width, height, unpack, pixels);
}