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
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:
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
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.
26 **************************************************************************/
33 #include "main/imports.h"
34 #include "main/image.h"
35 #include "main/bufferobj.h"
36 #include "main/macros.h"
37 #include "shader/program.h"
38 #include "shader/prog_print.h"
40 #include "st_context.h"
42 #include "st_atom_constbuf.h"
43 #include "st_program.h"
44 #include "st_cb_bitmap.h"
45 #include "st_texture.h"
46 #include "st_inlines.h"
48 #include "pipe/p_context.h"
49 #include "pipe/p_defines.h"
50 #include "util/u_inlines.h"
51 #include "util/u_draw_quad.h"
52 #include "util/u_simple_shaders.h"
53 #include "shader/prog_instruction.h"
54 #include "cso_cache/cso_context.h"
59 * glBitmaps are drawn as textured quads. The user's bitmap pattern
60 * is stored in a texture image. An alpha8 texture format is used.
61 * The fragment shader samples a bit (texel) from the texture, then
62 * discards the fragment if the bit is off.
64 * Note that we actually store the inverse image of the bitmap to
65 * simplify the fragment program. An "on" bit gets stored as texel=0x0
66 * and an "off" bit is stored as texel=0xff. Then we kill the
67 * fragment if the negated texel value is less than zero.
72 * The bitmap cache attempts to accumulate multiple glBitmap calls in a
73 * buffer which is then rendered en mass upon a flush, state change, etc.
74 * A wide, short buffer is used to target the common case of a series
75 * of glBitmap calls being used to draw text.
77 static GLboolean UseBitmapCache
= GL_TRUE
;
80 #define BITMAP_CACHE_WIDTH 512
81 #define BITMAP_CACHE_HEIGHT 32
85 /** Window pos to render the cached image */
87 /** Bounds of region used in window coords */
88 GLint xmin
, ymin
, xmax
, ymax
;
92 /** Bitmap's Z position */
95 struct pipe_texture
*texture
;
96 struct pipe_transfer
*trans
;
100 /** An I8 texture image: */
105 /** Epsilon for Z comparisons */
106 #define Z_EPSILON 1e-06
110 * Make fragment program for glBitmap:
111 * Sample the texture and kill the fragment if the bit is 0.
112 * This program will be combined with the user's fragment program.
114 static struct st_fragment_program
*
115 make_bitmap_fragment_program(GLcontext
*ctx
, GLuint samplerIndex
)
117 struct st_fragment_program
*stfp
;
118 struct gl_program
*p
;
121 p
= ctx
->Driver
.NewProgram(ctx
, GL_FRAGMENT_PROGRAM_ARB
, 0);
125 p
->NumInstructions
= 3;
127 p
->Instructions
= _mesa_alloc_instructions(p
->NumInstructions
);
128 if (!p
->Instructions
) {
129 ctx
->Driver
.DeleteProgram(ctx
, p
);
132 _mesa_init_instructions(p
->Instructions
, p
->NumInstructions
);
134 /* TEX tmp0, fragment.texcoord[0], texture[0], 2D; */
135 p
->Instructions
[ic
].Opcode
= OPCODE_TEX
;
136 p
->Instructions
[ic
].DstReg
.File
= PROGRAM_TEMPORARY
;
137 p
->Instructions
[ic
].DstReg
.Index
= 0;
138 p
->Instructions
[ic
].SrcReg
[0].File
= PROGRAM_INPUT
;
139 p
->Instructions
[ic
].SrcReg
[0].Index
= FRAG_ATTRIB_TEX0
;
140 p
->Instructions
[ic
].TexSrcUnit
= samplerIndex
;
141 p
->Instructions
[ic
].TexSrcTarget
= TEXTURE_2D_INDEX
;
144 /* KIL if -tmp0 < 0 # texel=0 -> keep / texel=0 -> discard */
145 p
->Instructions
[ic
].Opcode
= OPCODE_KIL
;
146 p
->Instructions
[ic
].SrcReg
[0].File
= PROGRAM_TEMPORARY
;
148 if (ctx
->st
->bitmap
.tex_format
== PIPE_FORMAT_L8_UNORM
)
149 p
->Instructions
[ic
].SrcReg
[0].Swizzle
= SWIZZLE_XXXX
;
151 p
->Instructions
[ic
].SrcReg
[0].Index
= 0;
152 p
->Instructions
[ic
].SrcReg
[0].Negate
= NEGATE_XYZW
;
156 p
->Instructions
[ic
++].Opcode
= OPCODE_END
;
158 assert(ic
== p
->NumInstructions
);
160 p
->InputsRead
= FRAG_BIT_TEX0
;
161 p
->OutputsWritten
= 0x0;
162 p
->SamplersUsed
= (1 << samplerIndex
);
164 stfp
= (struct st_fragment_program
*) p
;
165 stfp
->Base
.UsesKill
= GL_TRUE
;
172 find_free_bit(uint bitfield
)
175 for (i
= 0; i
< 32; i
++) {
176 if ((bitfield
& (1 << i
)) == 0) {
185 * Combine basic bitmap fragment program with the user-defined program.
187 static struct st_fragment_program
*
188 combined_bitmap_fragment_program(GLcontext
*ctx
)
190 struct st_context
*st
= ctx
->st
;
191 struct st_fragment_program
*stfp
= st
->fp
;
193 if (!stfp
->bitmap_program
) {
195 * Generate new program which is the user-defined program prefixed
196 * with the bitmap sampler/kill instructions.
198 struct st_fragment_program
*bitmap_prog
;
201 sampler
= find_free_bit(st
->fp
->Base
.Base
.SamplersUsed
);
202 bitmap_prog
= make_bitmap_fragment_program(ctx
, sampler
);
204 stfp
->bitmap_program
= (struct st_fragment_program
*)
205 _mesa_combine_programs(ctx
,
206 &bitmap_prog
->Base
.Base
, &stfp
->Base
.Base
);
207 stfp
->bitmap_program
->bitmap_sampler
= sampler
;
209 /* done with this after combining */
210 st_reference_fragprog(st
, &bitmap_prog
, NULL
);
214 struct gl_program
*p
= &stfp
->bitmap_program
->Base
.Base
;
215 printf("Combined bitmap program:\n");
216 _mesa_print_program(p
);
217 printf("InputsRead: 0x%x\n", p
->InputsRead
);
218 printf("OutputsWritten: 0x%x\n", p
->OutputsWritten
);
219 _mesa_print_parameter_list(p
->Parameters
);
223 /* translate to TGSI tokens */
224 st_translate_fragment_program(st
, stfp
->bitmap_program
);
227 return stfp
->bitmap_program
;
232 * Copy user-provide bitmap bits into texture buffer, expanding
234 * "On" bits will set texels to 0x0.
235 * "Off" bits will not modify texels.
236 * Note that the image is actually going to be upside down in
237 * the texture. We deal with that with texcoords.
240 unpack_bitmap(struct st_context
*st
,
241 GLint px
, GLint py
, GLsizei width
, GLsizei height
,
242 const struct gl_pixelstore_attrib
*unpack
,
243 const GLubyte
*bitmap
,
244 ubyte
*destBuffer
, uint destStride
)
246 destBuffer
+= py
* destStride
+ px
;
248 _mesa_expand_bitmap(width
, height
, unpack
, bitmap
,
249 destBuffer
, destStride
, 0x0);
254 * Create a texture which represents a bitmap image.
256 static struct pipe_texture
*
257 make_bitmap_texture(GLcontext
*ctx
, GLsizei width
, GLsizei height
,
258 const struct gl_pixelstore_attrib
*unpack
,
259 const GLubyte
*bitmap
)
261 struct pipe_context
*pipe
= ctx
->st
->pipe
;
262 struct pipe_transfer
*transfer
;
264 struct pipe_texture
*pt
;
267 bitmap
= _mesa_map_pbo_source(ctx
, unpack
, bitmap
);
273 * Create texture to hold bitmap pattern.
275 pt
= st_texture_create(ctx
->st
, PIPE_TEXTURE_2D
, ctx
->st
->bitmap
.tex_format
,
277 PIPE_TEXTURE_USAGE_SAMPLER
);
279 _mesa_unmap_pbo_source(ctx
, unpack
);
283 transfer
= st_no_flush_get_tex_transfer(st_context(ctx
), pt
, 0, 0, 0,
285 0, 0, width
, height
);
287 dest
= pipe
->transfer_map(pipe
, transfer
);
289 /* Put image into texture transfer */
290 memset(dest
, 0xff, height
* transfer
->stride
);
291 unpack_bitmap(ctx
->st
, 0, 0, width
, height
, unpack
, bitmap
,
292 dest
, transfer
->stride
);
294 _mesa_unmap_pbo_source(ctx
, unpack
);
296 /* Release transfer */
297 pipe
->transfer_unmap(pipe
, transfer
);
298 pipe
->tex_transfer_destroy(pipe
, transfer
);
304 setup_bitmap_vertex_data(struct st_context
*st
,
305 int x
, int y
, int width
, int height
,
306 float z
, const float color
[4])
308 struct pipe_context
*pipe
= st
->pipe
;
309 const struct gl_framebuffer
*fb
= st
->ctx
->DrawBuffer
;
310 const GLfloat fb_width
= (GLfloat
)fb
->Width
;
311 const GLfloat fb_height
= (GLfloat
)fb
->Height
;
312 const GLfloat x0
= (GLfloat
)x
;
313 const GLfloat x1
= (GLfloat
)(x
+ width
);
314 const GLfloat y0
= (GLfloat
)y
;
315 const GLfloat y1
= (GLfloat
)(y
+ height
);
316 const GLfloat sLeft
= (GLfloat
)0.0, sRight
= (GLfloat
)1.0;
317 const GLfloat tTop
= (GLfloat
)0.0, tBot
= (GLfloat
)1.0 - tTop
;
318 const GLfloat clip_x0
= (GLfloat
)(x0
/ fb_width
* 2.0 - 1.0);
319 const GLfloat clip_y0
= (GLfloat
)(y0
/ fb_height
* 2.0 - 1.0);
320 const GLfloat clip_x1
= (GLfloat
)(x1
/ fb_width
* 2.0 - 1.0);
321 const GLfloat clip_y1
= (GLfloat
)(y1
/ fb_height
* 2.0 - 1.0);
323 /* XXX: Need to improve buffer_write to allow NO_WAIT (as well as
324 * no_flush) updates to buffers where we know there is no conflict
325 * with previous data. Currently using max_slots > 1 will cause
326 * synchronous rendering if the driver flushes its command buffers
327 * between one bitmap and the next. Our flush hook below isn't
328 * sufficient to catch this as the driver doesn't tell us when it
329 * flushes its own command buffers. Until this gets fixed, pay the
330 * price of allocating a new buffer for each bitmap cache-flush to
331 * avoid synchronous rendering.
333 const GLuint max_slots
= 1; /* 4096 / sizeof(st->bitmap.vertices); */
336 if (st
->bitmap
.vbuf_slot
>= max_slots
) {
337 pipe_buffer_reference(&st
->bitmap
.vbuf
, NULL
);
338 st
->bitmap
.vbuf_slot
= 0;
341 if (!st
->bitmap
.vbuf
) {
342 st
->bitmap
.vbuf
= pipe_buffer_create(pipe
->screen
, 32,
343 PIPE_BUFFER_USAGE_VERTEX
,
344 max_slots
* sizeof(st
->bitmap
.vertices
));
347 /* Positions are in clip coords since we need to do clipping in case
348 * the bitmap quad goes beyond the window bounds.
350 st
->bitmap
.vertices
[0][0][0] = clip_x0
;
351 st
->bitmap
.vertices
[0][0][1] = clip_y0
;
352 st
->bitmap
.vertices
[0][2][0] = sLeft
;
353 st
->bitmap
.vertices
[0][2][1] = tTop
;
355 st
->bitmap
.vertices
[1][0][0] = clip_x1
;
356 st
->bitmap
.vertices
[1][0][1] = clip_y0
;
357 st
->bitmap
.vertices
[1][2][0] = sRight
;
358 st
->bitmap
.vertices
[1][2][1] = tTop
;
360 st
->bitmap
.vertices
[2][0][0] = clip_x1
;
361 st
->bitmap
.vertices
[2][0][1] = clip_y1
;
362 st
->bitmap
.vertices
[2][2][0] = sRight
;
363 st
->bitmap
.vertices
[2][2][1] = tBot
;
365 st
->bitmap
.vertices
[3][0][0] = clip_x0
;
366 st
->bitmap
.vertices
[3][0][1] = clip_y1
;
367 st
->bitmap
.vertices
[3][2][0] = sLeft
;
368 st
->bitmap
.vertices
[3][2][1] = tBot
;
370 /* same for all verts: */
371 for (i
= 0; i
< 4; i
++) {
372 st
->bitmap
.vertices
[i
][0][2] = z
;
373 st
->bitmap
.vertices
[i
][0][3] = 1.0;
374 st
->bitmap
.vertices
[i
][1][0] = color
[0];
375 st
->bitmap
.vertices
[i
][1][1] = color
[1];
376 st
->bitmap
.vertices
[i
][1][2] = color
[2];
377 st
->bitmap
.vertices
[i
][1][3] = color
[3];
378 st
->bitmap
.vertices
[i
][2][2] = 0.0; /*R*/
379 st
->bitmap
.vertices
[i
][2][3] = 1.0; /*Q*/
382 /* put vertex data into vbuf */
383 st_no_flush_pipe_buffer_write_nooverlap(st
,
385 st
->bitmap
.vbuf_slot
* sizeof st
->bitmap
.vertices
,
386 sizeof st
->bitmap
.vertices
,
387 st
->bitmap
.vertices
);
389 return st
->bitmap
.vbuf_slot
++ * sizeof st
->bitmap
.vertices
;
395 * Render a glBitmap by drawing a textured quad
398 draw_bitmap_quad(GLcontext
*ctx
, GLint x
, GLint y
, GLfloat z
,
399 GLsizei width
, GLsizei height
,
400 struct pipe_texture
*pt
,
401 const GLfloat
*color
)
403 struct st_context
*st
= ctx
->st
;
404 struct pipe_context
*pipe
= ctx
->st
->pipe
;
405 struct cso_context
*cso
= ctx
->st
->cso_context
;
406 struct st_fragment_program
*stfp
;
410 stfp
= combined_bitmap_fragment_program(ctx
);
412 /* As an optimization, Mesa's fragment programs will sometimes get the
413 * primary color from a statevar/constant rather than a varying variable.
414 * when that's the case, we need to ensure that we use the 'color'
415 * parameter and not the current attribute color (which may have changed
416 * through glRasterPos and state validation.
417 * So, we force the proper color here. Not elegant, but it works.
420 GLfloat colorSave
[4];
421 COPY_4V(colorSave
, ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR0
]);
422 COPY_4V(ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR0
], color
);
423 st_upload_constants(st
, stfp
->Base
.Base
.Parameters
, PIPE_SHADER_FRAGMENT
);
424 COPY_4V(ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR0
], colorSave
);
429 /* XXX if the bitmap is larger than the max texture size, break
432 maxSize
= 1 << (pipe
->screen
->get_param(pipe
->screen
, PIPE_CAP_MAX_TEXTURE_2D_LEVELS
) - 1);
433 assert(width
<= (GLsizei
)maxSize
);
434 assert(height
<= (GLsizei
)maxSize
);
436 cso_save_rasterizer(cso
);
437 cso_save_samplers(cso
);
438 cso_save_sampler_textures(cso
);
439 cso_save_viewport(cso
);
440 cso_save_fragment_shader(cso
);
441 cso_save_vertex_shader(cso
);
442 cso_save_vertex_elements(cso
);
444 /* rasterizer state: just scissor */
445 st
->bitmap
.rasterizer
.scissor
= ctx
->Scissor
.Enabled
;
446 cso_set_rasterizer(cso
, &st
->bitmap
.rasterizer
);
448 /* fragment shader state: TEX lookup program */
449 cso_set_fragment_shader_handle(cso
, stfp
->driver_shader
);
451 /* vertex shader state: position + texcoord pass-through */
452 cso_set_vertex_shader_handle(cso
, st
->bitmap
.vs
);
454 /* user samplers, plus our bitmap sampler */
456 struct pipe_sampler_state
*samplers
[PIPE_MAX_SAMPLERS
];
457 uint num
= MAX2(stfp
->bitmap_sampler
+ 1, st
->state
.num_samplers
);
459 for (i
= 0; i
< st
->state
.num_samplers
; i
++) {
460 samplers
[i
] = &st
->state
.samplers
[i
];
462 samplers
[stfp
->bitmap_sampler
] = &st
->bitmap
.sampler
;
463 cso_set_samplers(cso
, num
, (const struct pipe_sampler_state
**) samplers
);
466 /* user textures, plus the bitmap texture */
468 struct pipe_texture
*textures
[PIPE_MAX_SAMPLERS
];
469 uint num
= MAX2(stfp
->bitmap_sampler
+ 1, st
->state
.num_textures
);
470 memcpy(textures
, st
->state
.sampler_texture
, sizeof(textures
));
471 textures
[stfp
->bitmap_sampler
] = pt
;
472 cso_set_sampler_textures(cso
, num
, textures
);
475 /* viewport state: viewport matching window dims */
477 const struct gl_framebuffer
*fb
= st
->ctx
->DrawBuffer
;
478 const GLboolean invert
= (st_fb_orientation(fb
) == Y_0_TOP
);
479 const GLfloat width
= (GLfloat
)fb
->Width
;
480 const GLfloat height
= (GLfloat
)fb
->Height
;
481 struct pipe_viewport_state vp
;
482 vp
.scale
[0] = 0.5f
* width
;
483 vp
.scale
[1] = height
* (invert
? -0.5f
: 0.5f
);
486 vp
.translate
[0] = 0.5f
* width
;
487 vp
.translate
[1] = 0.5f
* height
;
488 vp
.translate
[2] = 0.5f
;
489 vp
.translate
[3] = 0.0f
;
490 cso_set_viewport(cso
, &vp
);
493 cso_set_vertex_elements(cso
, 3, st
->velems_util_draw
);
495 /* convert Z from [0,1] to [-1,-1] to match viewport Z scale/bias */
498 /* draw textured quad */
499 offset
= setup_bitmap_vertex_data(st
, x
, y
, width
, height
, z
, color
);
501 util_draw_vertex_buffer(pipe
, st
->bitmap
.vbuf
, offset
,
502 PIPE_PRIM_TRIANGLE_FAN
,
504 3); /* attribs/vert */
508 cso_restore_rasterizer(cso
);
509 cso_restore_samplers(cso
);
510 cso_restore_sampler_textures(cso
);
511 cso_restore_viewport(cso
);
512 cso_restore_fragment_shader(cso
);
513 cso_restore_vertex_shader(cso
);
514 cso_restore_vertex_elements(cso
);
519 reset_cache(struct st_context
*st
)
521 struct pipe_context
*pipe
= st
->pipe
;
522 struct bitmap_cache
*cache
= st
->bitmap
.cache
;
524 /*memset(cache->buffer, 0xff, sizeof(cache->buffer));*/
525 cache
->empty
= GL_TRUE
;
527 cache
->xmin
= 1000000;
528 cache
->xmax
= -1000000;
529 cache
->ymin
= 1000000;
530 cache
->ymax
= -1000000;
533 pipe
->tex_transfer_destroy(pipe
, cache
->trans
);
537 assert(!cache
->texture
);
539 /* allocate a new texture */
540 cache
->texture
= st_texture_create(st
, PIPE_TEXTURE_2D
,
541 st
->bitmap
.tex_format
, 0,
542 BITMAP_CACHE_WIDTH
, BITMAP_CACHE_HEIGHT
,
543 1, PIPE_TEXTURE_USAGE_SAMPLER
);
547 /** Print bitmap image to stdout (debug) */
549 print_cache(const struct bitmap_cache
*cache
)
553 for (i
= 0; i
< BITMAP_CACHE_HEIGHT
; i
++) {
554 k
= BITMAP_CACHE_WIDTH
* (BITMAP_CACHE_HEIGHT
- i
- 1);
555 for (j
= 0; j
< BITMAP_CACHE_WIDTH
; j
++) {
556 if (cache
->buffer
[k
])
568 create_cache_trans(struct st_context
*st
)
570 struct pipe_context
*pipe
= st
->pipe
;
571 struct bitmap_cache
*cache
= st
->bitmap
.cache
;
576 /* Map the texture transfer.
577 * Subsequent glBitmap calls will write into the texture image.
579 cache
->trans
= st_no_flush_get_tex_transfer(st
, cache
->texture
, 0, 0, 0,
580 PIPE_TRANSFER_WRITE
, 0, 0,
582 BITMAP_CACHE_HEIGHT
);
583 cache
->buffer
= pipe
->transfer_map(pipe
, cache
->trans
);
585 /* init image to all 0xff */
586 memset(cache
->buffer
, 0xff, cache
->trans
->stride
* BITMAP_CACHE_HEIGHT
);
591 * If there's anything in the bitmap cache, draw/flush it now.
594 st_flush_bitmap_cache(struct st_context
*st
)
596 if (!st
->bitmap
.cache
->empty
) {
597 struct bitmap_cache
*cache
= st
->bitmap
.cache
;
599 if (st
->ctx
->DrawBuffer
) {
600 struct pipe_context
*pipe
= st
->pipe
;
602 assert(cache
->xmin
<= cache
->xmax
);
604 /* printf("flush size %d x %d at %d, %d\n",
605 cache->xmax - cache->xmin,
606 cache->ymax - cache->ymin,
607 cache->xpos, cache->ypos);
610 /* The texture transfer has been mapped until now.
611 * So unmap and release the texture transfer before drawing.
616 pipe
->transfer_unmap(pipe
, cache
->trans
);
617 cache
->buffer
= NULL
;
619 pipe
->tex_transfer_destroy(pipe
, cache
->trans
);
623 draw_bitmap_quad(st
->ctx
,
627 BITMAP_CACHE_WIDTH
, BITMAP_CACHE_HEIGHT
,
632 /* release/free the texture */
633 pipe_texture_reference(&cache
->texture
, NULL
);
639 /* Flush bitmap cache and release vertex buffer.
642 st_flush_bitmap( struct st_context
*st
)
644 st_flush_bitmap_cache(st
);
646 /* Release vertex buffer to avoid synchronous rendering if we were
647 * to map it in the next frame.
649 pipe_buffer_reference(&st
->bitmap
.vbuf
, NULL
);
650 st
->bitmap
.vbuf_slot
= 0;
655 * Try to accumulate this glBitmap call in the bitmap cache.
656 * \return GL_TRUE for success, GL_FALSE if bitmap is too large, etc.
659 accum_bitmap(struct st_context
*st
,
660 GLint x
, GLint y
, GLsizei width
, GLsizei height
,
661 const struct gl_pixelstore_attrib
*unpack
,
662 const GLubyte
*bitmap
)
664 struct bitmap_cache
*cache
= st
->bitmap
.cache
;
665 int px
= -999, py
= -999;
666 const GLfloat z
= st
->ctx
->Current
.RasterPos
[2];
668 if (width
> BITMAP_CACHE_WIDTH
||
669 height
> BITMAP_CACHE_HEIGHT
)
670 return GL_FALSE
; /* too big to cache */
673 px
= x
- cache
->xpos
; /* pos in buffer */
674 py
= y
- cache
->ypos
;
675 if (px
< 0 || px
+ width
> BITMAP_CACHE_WIDTH
||
676 py
< 0 || py
+ height
> BITMAP_CACHE_HEIGHT
||
677 !TEST_EQ_4V(st
->ctx
->Current
.RasterColor
, cache
->color
) ||
678 ((fabs(z
- cache
->zpos
) > Z_EPSILON
))) {
679 /* This bitmap would extend beyond cache bounds, or the bitmap
681 * so flush and continue.
683 st_flush_bitmap_cache(st
);
688 /* Initialize. Center bitmap vertically in the buffer. */
690 py
= (BITMAP_CACHE_HEIGHT
- height
) / 2;
692 cache
->ypos
= y
- py
;
694 cache
->empty
= GL_FALSE
;
695 COPY_4FV(cache
->color
, st
->ctx
->Current
.RasterColor
);
705 if (x
+ width
> cache
->xmax
)
706 cache
->xmax
= x
+ width
;
707 if (y
+ height
> cache
->ymax
)
708 cache
->ymax
= y
+ height
;
710 /* create the transfer if needed */
711 create_cache_trans(st
);
713 unpack_bitmap(st
, px
, py
, width
, height
, unpack
, bitmap
,
714 cache
->buffer
, BITMAP_CACHE_WIDTH
);
716 return GL_TRUE
; /* accumulated */
722 * Called via ctx->Driver.Bitmap()
725 st_Bitmap(GLcontext
*ctx
, GLint x
, GLint y
, GLsizei width
, GLsizei height
,
726 const struct gl_pixelstore_attrib
*unpack
, const GLubyte
*bitmap
)
728 struct st_context
*st
= ctx
->st
;
729 struct pipe_texture
*pt
;
731 if (width
== 0 || height
== 0)
734 st_validate_state(st
);
736 if (!st
->bitmap
.vs
) {
737 /* create pass-through vertex shader now */
738 const uint semantic_names
[] = { TGSI_SEMANTIC_POSITION
,
740 TGSI_SEMANTIC_GENERIC
};
741 const uint semantic_indexes
[] = { 0, 0, 0 };
742 st
->bitmap
.vs
= util_make_vertex_passthrough_shader(st
->pipe
, 3,
747 if (UseBitmapCache
&& accum_bitmap(st
, x
, y
, width
, height
, unpack
, bitmap
))
750 pt
= make_bitmap_texture(ctx
, width
, height
, unpack
, bitmap
);
752 assert(pt
->target
== PIPE_TEXTURE_2D
);
753 draw_bitmap_quad(ctx
, x
, y
, ctx
->Current
.RasterPos
[2],
755 st
->ctx
->Current
.RasterColor
);
756 /* release/free the texture */
757 pipe_texture_reference(&pt
, NULL
);
762 /** Per-context init */
764 st_init_bitmap_functions(struct dd_function_table
*functions
)
766 functions
->Bitmap
= st_Bitmap
;
770 /** Per-context init */
772 st_init_bitmap(struct st_context
*st
)
774 struct pipe_sampler_state
*sampler
= &st
->bitmap
.sampler
;
775 struct pipe_context
*pipe
= st
->pipe
;
776 struct pipe_screen
*screen
= pipe
->screen
;
778 /* init sampler state once */
779 memset(sampler
, 0, sizeof(*sampler
));
780 sampler
->wrap_s
= PIPE_TEX_WRAP_CLAMP
;
781 sampler
->wrap_t
= PIPE_TEX_WRAP_CLAMP
;
782 sampler
->wrap_r
= PIPE_TEX_WRAP_CLAMP
;
783 sampler
->min_img_filter
= PIPE_TEX_FILTER_NEAREST
;
784 sampler
->min_mip_filter
= PIPE_TEX_MIPFILTER_NONE
;
785 sampler
->mag_img_filter
= PIPE_TEX_FILTER_NEAREST
;
786 sampler
->normalized_coords
= 1;
788 /* init baseline rasterizer state once */
789 memset(&st
->bitmap
.rasterizer
, 0, sizeof(st
->bitmap
.rasterizer
));
790 st
->bitmap
.rasterizer
.gl_rasterization_rules
= 1;
792 /* find a usable texture format */
793 if (screen
->is_format_supported(screen
, PIPE_FORMAT_I8_UNORM
, PIPE_TEXTURE_2D
,
794 PIPE_TEXTURE_USAGE_SAMPLER
, 0)) {
795 st
->bitmap
.tex_format
= PIPE_FORMAT_I8_UNORM
;
797 else if (screen
->is_format_supported(screen
, PIPE_FORMAT_A8_UNORM
, PIPE_TEXTURE_2D
,
798 PIPE_TEXTURE_USAGE_SAMPLER
, 0)) {
799 st
->bitmap
.tex_format
= PIPE_FORMAT_A8_UNORM
;
801 else if (screen
->is_format_supported(screen
, PIPE_FORMAT_L8_UNORM
, PIPE_TEXTURE_2D
,
802 PIPE_TEXTURE_USAGE_SAMPLER
, 0)) {
803 st
->bitmap
.tex_format
= PIPE_FORMAT_L8_UNORM
;
806 /* XXX support more formats */
810 /* alloc bitmap cache object */
811 st
->bitmap
.cache
= ST_CALLOC_STRUCT(bitmap_cache
);
817 /** Per-context tear-down */
819 st_destroy_bitmap(struct st_context
*st
)
821 struct pipe_context
*pipe
= st
->pipe
;
822 struct bitmap_cache
*cache
= st
->bitmap
.cache
;
827 cso_delete_vertex_shader(st
->cso_context
, st
->bitmap
.vs
);
828 st
->bitmap
.vs
= NULL
;
831 if (st
->bitmap
.vbuf
) {
832 pipe_buffer_reference(&st
->bitmap
.vbuf
, NULL
);
833 st
->bitmap
.vbuf
= NULL
;
838 pipe
->transfer_unmap(pipe
, cache
->trans
);
839 pipe
->tex_transfer_destroy(pipe
, cache
->trans
);
841 pipe_texture_reference(&st
->bitmap
.cache
->texture
, NULL
);
842 free(st
->bitmap
.cache
);
843 st
->bitmap
.cache
= NULL
;