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 "main/texformat.h"
38 #include "shader/program.h"
39 #include "shader/prog_parameter.h"
40 #include "shader/prog_print.h"
42 #include "st_context.h"
44 #include "st_atom_constbuf.h"
45 #include "st_program.h"
46 #include "st_cb_bitmap.h"
47 #include "st_cb_program.h"
48 #include "st_mesa_to_tgsi.h"
49 #include "st_texture.h"
50 #include "st_inlines.h"
52 #include "pipe/p_context.h"
53 #include "pipe/p_defines.h"
54 #include "pipe/p_inlines.h"
55 #include "util/u_tile.h"
56 #include "util/u_draw_quad.h"
57 #include "util/u_simple_shaders.h"
58 #include "shader/prog_instruction.h"
59 #include "cso_cache/cso_context.h"
64 * glBitmaps are drawn as textured quads. The user's bitmap pattern
65 * is stored in a texture image. An alpha8 texture format is used.
66 * The fragment shader samples a bit (texel) from the texture, then
67 * discards the fragment if the bit is off.
69 * Note that we actually store the inverse image of the bitmap to
70 * simplify the fragment program. An "on" bit gets stored as texel=0x0
71 * and an "off" bit is stored as texel=0xff. Then we kill the
72 * fragment if the negated texel value is less than zero.
77 * The bitmap cache attempts to accumulate multiple glBitmap calls in a
78 * buffer which is then rendered en mass upon a flush, state change, etc.
79 * A wide, short buffer is used to target the common case of a series
80 * of glBitmap calls being used to draw text.
82 static GLboolean UseBitmapCache
= GL_TRUE
;
85 #define BITMAP_CACHE_WIDTH 512
86 #define BITMAP_CACHE_HEIGHT 32
90 /** Window pos to render the cached image */
92 /** Bounds of region used in window coords */
93 GLint xmin
, ymin
, xmax
, ymax
;
97 /** Bitmap's Z position */
100 struct pipe_texture
*texture
;
101 struct pipe_transfer
*trans
;
105 /** An I8 texture image: */
110 /** Epsilon for Z comparisons */
111 #define Z_EPSILON 1e-06
115 * Make fragment program for glBitmap:
116 * Sample the texture and kill the fragment if the bit is 0.
117 * This program will be combined with the user's fragment program.
119 static struct st_fragment_program
*
120 make_bitmap_fragment_program(GLcontext
*ctx
, GLuint samplerIndex
)
122 struct st_fragment_program
*stfp
;
123 struct gl_program
*p
;
126 p
= ctx
->Driver
.NewProgram(ctx
, GL_FRAGMENT_PROGRAM_ARB
, 0);
130 p
->NumInstructions
= 3;
132 p
->Instructions
= _mesa_alloc_instructions(p
->NumInstructions
);
133 if (!p
->Instructions
) {
134 ctx
->Driver
.DeleteProgram(ctx
, p
);
137 _mesa_init_instructions(p
->Instructions
, p
->NumInstructions
);
139 /* TEX tmp0, fragment.texcoord[0], texture[0], 2D; */
140 p
->Instructions
[ic
].Opcode
= OPCODE_TEX
;
141 p
->Instructions
[ic
].DstReg
.File
= PROGRAM_TEMPORARY
;
142 p
->Instructions
[ic
].DstReg
.Index
= 0;
143 p
->Instructions
[ic
].SrcReg
[0].File
= PROGRAM_INPUT
;
144 p
->Instructions
[ic
].SrcReg
[0].Index
= FRAG_ATTRIB_TEX0
;
145 p
->Instructions
[ic
].TexSrcUnit
= samplerIndex
;
146 p
->Instructions
[ic
].TexSrcTarget
= TEXTURE_2D_INDEX
;
149 /* KIL if -tmp0 < 0 # texel=0 -> keep / texel=0 -> discard */
150 p
->Instructions
[ic
].Opcode
= OPCODE_KIL
;
151 p
->Instructions
[ic
].SrcReg
[0].File
= PROGRAM_TEMPORARY
;
153 if (ctx
->st
->bitmap
.tex_format
== PIPE_FORMAT_L8_UNORM
)
154 p
->Instructions
[ic
].SrcReg
[0].Swizzle
= SWIZZLE_XXXX
;
156 p
->Instructions
[ic
].SrcReg
[0].Index
= 0;
157 p
->Instructions
[ic
].SrcReg
[0].Negate
= NEGATE_XYZW
;
161 p
->Instructions
[ic
++].Opcode
= OPCODE_END
;
163 assert(ic
== p
->NumInstructions
);
165 p
->InputsRead
= FRAG_BIT_TEX0
;
166 p
->OutputsWritten
= 0x0;
167 p
->SamplersUsed
= (1 << samplerIndex
);
169 stfp
= (struct st_fragment_program
*) p
;
170 stfp
->Base
.UsesKill
= GL_TRUE
;
172 /* No need to send this incomplete program down to hardware:
174 * st_translate_fragment_program(ctx->st, stfp, NULL);
182 find_free_bit(uint bitfield
)
185 for (i
= 0; i
< 32; i
++) {
186 if ((bitfield
& (1 << i
)) == 0) {
195 * Combine basic bitmap fragment program with the user-defined program.
197 static struct st_fragment_program
*
198 combined_bitmap_fragment_program(GLcontext
*ctx
)
200 struct st_context
*st
= ctx
->st
;
201 struct st_fragment_program
*stfp
= st
->fp
;
203 if (!stfp
->bitmap_program
) {
205 * Generate new program which is the user-defined program prefixed
206 * with the bitmap sampler/kill instructions.
208 struct st_fragment_program
*bitmap_prog
;
211 sampler
= find_free_bit(st
->fp
->Base
.Base
.SamplersUsed
);
212 bitmap_prog
= make_bitmap_fragment_program(ctx
, sampler
);
214 stfp
->bitmap_program
= (struct st_fragment_program
*)
215 _mesa_combine_programs(ctx
,
216 &bitmap_prog
->Base
.Base
, &stfp
->Base
.Base
);
217 stfp
->bitmap_program
->bitmap_sampler
= sampler
;
219 /* done with this after combining */
220 st_reference_fragprog(st
, &bitmap_prog
, NULL
);
224 struct gl_program
*p
= &stfp
->bitmap_program
->Base
.Base
;
225 printf("Combined bitmap program:\n");
226 _mesa_print_program(p
);
227 printf("InputsRead: 0x%x\n", p
->InputsRead
);
228 printf("OutputsWritten: 0x%x\n", p
->OutputsWritten
);
229 _mesa_print_parameter_list(p
->Parameters
);
233 /* translate to TGSI tokens */
234 st_translate_fragment_program(st
, stfp
->bitmap_program
, NULL
);
237 return stfp
->bitmap_program
;
242 * Copy user-provide bitmap bits into texture buffer, expanding
244 * "On" bits will set texels to 0x0.
245 * "Off" bits will not modify texels.
246 * Note that the image is actually going to be upside down in
247 * the texture. We deal with that with texcoords.
250 unpack_bitmap(struct st_context
*st
,
251 GLint px
, GLint py
, GLsizei width
, GLsizei height
,
252 const struct gl_pixelstore_attrib
*unpack
,
253 const GLubyte
*bitmap
,
254 ubyte
*destBuffer
, uint destStride
)
256 destBuffer
+= py
* destStride
+ px
;
258 _mesa_expand_bitmap(width
, height
, unpack
, bitmap
,
259 destBuffer
, destStride
, 0x0);
264 * Create a texture which represents a bitmap image.
266 static struct pipe_texture
*
267 make_bitmap_texture(GLcontext
*ctx
, GLsizei width
, GLsizei height
,
268 const struct gl_pixelstore_attrib
*unpack
,
269 const GLubyte
*bitmap
)
271 struct pipe_context
*pipe
= ctx
->st
->pipe
;
272 struct pipe_screen
*screen
= pipe
->screen
;
273 struct pipe_transfer
*transfer
;
275 struct pipe_texture
*pt
;
278 bitmap
= _mesa_map_pbo_source(ctx
, unpack
, bitmap
);
284 * Create texture to hold bitmap pattern.
286 pt
= st_texture_create(ctx
->st
, PIPE_TEXTURE_2D
, ctx
->st
->bitmap
.tex_format
,
288 PIPE_TEXTURE_USAGE_SAMPLER
);
290 _mesa_unmap_pbo_source(ctx
, unpack
);
294 transfer
= st_no_flush_get_tex_transfer(st_context(ctx
), pt
, 0, 0, 0,
296 0, 0, width
, height
);
298 dest
= screen
->transfer_map(screen
, transfer
);
300 /* Put image into texture transfer */
301 memset(dest
, 0xff, height
* transfer
->stride
);
302 unpack_bitmap(ctx
->st
, 0, 0, width
, height
, unpack
, bitmap
,
303 dest
, transfer
->stride
);
305 _mesa_unmap_pbo_source(ctx
, unpack
);
307 /* Release transfer */
308 screen
->transfer_unmap(screen
, transfer
);
309 screen
->tex_transfer_destroy(transfer
);
315 setup_bitmap_vertex_data(struct st_context
*st
,
316 int x
, int y
, int width
, int height
,
317 float z
, const float color
[4])
319 struct pipe_context
*pipe
= st
->pipe
;
320 const struct gl_framebuffer
*fb
= st
->ctx
->DrawBuffer
;
321 const GLfloat fb_width
= (GLfloat
)fb
->Width
;
322 const GLfloat fb_height
= (GLfloat
)fb
->Height
;
323 const GLfloat x0
= (GLfloat
)x
;
324 const GLfloat x1
= (GLfloat
)(x
+ width
);
325 const GLfloat y0
= (GLfloat
)y
;
326 const GLfloat y1
= (GLfloat
)(y
+ height
);
327 const GLfloat sLeft
= (GLfloat
)0.0, sRight
= (GLfloat
)1.0;
328 const GLfloat tTop
= (GLfloat
)0.0, tBot
= (GLfloat
)1.0 - tTop
;
329 const GLfloat clip_x0
= (GLfloat
)(x0
/ fb_width
* 2.0 - 1.0);
330 const GLfloat clip_y0
= (GLfloat
)(y0
/ fb_height
* 2.0 - 1.0);
331 const GLfloat clip_x1
= (GLfloat
)(x1
/ fb_width
* 2.0 - 1.0);
332 const GLfloat clip_y1
= (GLfloat
)(y1
/ fb_height
* 2.0 - 1.0);
333 const GLuint max_slots
= 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(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
);
443 /* rasterizer state: just scissor */
444 st
->bitmap
.rasterizer
.scissor
= ctx
->Scissor
.Enabled
;
445 cso_set_rasterizer(cso
, &st
->bitmap
.rasterizer
);
447 /* fragment shader state: TEX lookup program */
448 cso_set_fragment_shader_handle(cso
, stfp
->driver_shader
);
450 /* vertex shader state: position + texcoord pass-through */
451 cso_set_vertex_shader_handle(cso
, st
->bitmap
.vs
);
453 /* user samplers, plus our bitmap sampler */
455 struct pipe_sampler_state
*samplers
[PIPE_MAX_SAMPLERS
];
456 uint num
= MAX2(stfp
->bitmap_sampler
+ 1, st
->state
.num_samplers
);
458 for (i
= 0; i
< st
->state
.num_samplers
; i
++) {
459 samplers
[i
] = &st
->state
.samplers
[i
];
461 samplers
[stfp
->bitmap_sampler
] = &st
->bitmap
.sampler
;
462 cso_set_samplers(cso
, num
, (const struct pipe_sampler_state
**) samplers
);
465 /* user textures, plus the bitmap texture */
467 struct pipe_texture
*textures
[PIPE_MAX_SAMPLERS
];
468 uint num
= MAX2(stfp
->bitmap_sampler
+ 1, st
->state
.num_textures
);
469 memcpy(textures
, st
->state
.sampler_texture
, sizeof(textures
));
470 textures
[stfp
->bitmap_sampler
] = pt
;
471 cso_set_sampler_textures(cso
, num
, textures
);
474 /* viewport state: viewport matching window dims */
476 const struct gl_framebuffer
*fb
= st
->ctx
->DrawBuffer
;
477 const GLboolean invert
= (st_fb_orientation(fb
) == Y_0_TOP
);
478 const GLfloat width
= (GLfloat
)fb
->Width
;
479 const GLfloat height
= (GLfloat
)fb
->Height
;
480 struct pipe_viewport_state vp
;
481 vp
.scale
[0] = 0.5f
* width
;
482 vp
.scale
[1] = height
* (invert
? -0.5f
: 0.5f
);
485 vp
.translate
[0] = 0.5f
* width
;
486 vp
.translate
[1] = 0.5f
* height
;
487 vp
.translate
[2] = 0.0f
;
488 vp
.translate
[3] = 0.0f
;
489 cso_set_viewport(cso
, &vp
);
492 /* draw textured quad */
493 offset
= setup_bitmap_vertex_data(st
, x
, y
, width
, height
, z
, color
);
495 util_draw_vertex_buffer(pipe
, st
->bitmap
.vbuf
, offset
,
496 PIPE_PRIM_TRIANGLE_FAN
,
498 3); /* attribs/vert */
502 cso_restore_rasterizer(cso
);
503 cso_restore_samplers(cso
);
504 cso_restore_sampler_textures(cso
);
505 cso_restore_viewport(cso
);
506 cso_restore_fragment_shader(cso
);
507 cso_restore_vertex_shader(cso
);
512 reset_cache(struct st_context
*st
)
514 struct pipe_context
*pipe
= st
->pipe
;
515 struct pipe_screen
*screen
= pipe
->screen
;
516 struct bitmap_cache
*cache
= st
->bitmap
.cache
;
518 //memset(cache->buffer, 0xff, sizeof(cache->buffer));
519 cache
->empty
= GL_TRUE
;
521 cache
->xmin
= 1000000;
522 cache
->xmax
= -1000000;
523 cache
->ymin
= 1000000;
524 cache
->ymax
= -1000000;
527 screen
->tex_transfer_destroy(cache
->trans
);
531 assert(!cache
->texture
);
533 /* allocate a new texture */
534 cache
->texture
= st_texture_create(st
, PIPE_TEXTURE_2D
,
535 st
->bitmap
.tex_format
, 0,
536 BITMAP_CACHE_WIDTH
, BITMAP_CACHE_HEIGHT
,
537 1, PIPE_TEXTURE_USAGE_SAMPLER
);
542 create_cache_trans(struct st_context
*st
)
544 struct pipe_context
*pipe
= st
->pipe
;
545 struct pipe_screen
*screen
= pipe
->screen
;
546 struct bitmap_cache
*cache
= st
->bitmap
.cache
;
551 /* Map the texture transfer.
552 * Subsequent glBitmap calls will write into the texture image.
554 cache
->trans
= st_no_flush_get_tex_transfer(st
, cache
->texture
, 0, 0, 0,
555 PIPE_TRANSFER_WRITE
, 0, 0,
557 BITMAP_CACHE_HEIGHT
);
558 cache
->buffer
= screen
->transfer_map(screen
, cache
->trans
);
560 /* init image to all 0xff */
561 memset(cache
->buffer
, 0xff, cache
->trans
->stride
* BITMAP_CACHE_HEIGHT
);
566 * If there's anything in the bitmap cache, draw/flush it now.
569 st_flush_bitmap_cache(struct st_context
*st
)
571 if (!st
->bitmap
.cache
->empty
) {
572 struct bitmap_cache
*cache
= st
->bitmap
.cache
;
574 if (st
->ctx
->DrawBuffer
) {
575 struct pipe_context
*pipe
= st
->pipe
;
576 struct pipe_screen
*screen
= pipe
->screen
;
578 assert(cache
->xmin
<= cache
->xmax
);
580 /* printf("flush size %d x %d at %d, %d\n",
581 cache->xmax - cache->xmin,
582 cache->ymax - cache->ymin,
583 cache->xpos, cache->ypos);
586 /* The texture transfer has been mapped until now.
587 * So unmap and release the texture transfer before drawing.
590 screen
->transfer_unmap(screen
, cache
->trans
);
591 cache
->buffer
= NULL
;
593 screen
->tex_transfer_destroy(cache
->trans
);
597 draw_bitmap_quad(st
->ctx
,
601 BITMAP_CACHE_WIDTH
, BITMAP_CACHE_HEIGHT
,
606 /* release/free the texture */
607 pipe_texture_reference(&cache
->texture
, NULL
);
613 /* Flush bitmap cache and release vertex buffer.
616 st_flush_bitmap( struct st_context
*st
)
618 st_flush_bitmap_cache(st
);
620 /* Release vertex buffer to avoid synchronous rendering if we were
621 * to map it in the next frame.
623 pipe_buffer_reference(&st
->bitmap
.vbuf
, NULL
);
624 st
->bitmap
.vbuf_slot
= 0;
629 * Try to accumulate this glBitmap call in the bitmap cache.
630 * \return GL_TRUE for success, GL_FALSE if bitmap is too large, etc.
633 accum_bitmap(struct st_context
*st
,
634 GLint x
, GLint y
, GLsizei width
, GLsizei height
,
635 const struct gl_pixelstore_attrib
*unpack
,
636 const GLubyte
*bitmap
)
638 struct bitmap_cache
*cache
= st
->bitmap
.cache
;
640 const GLfloat z
= st
->ctx
->Current
.RasterPos
[2];
642 if (width
> BITMAP_CACHE_WIDTH
||
643 height
> BITMAP_CACHE_HEIGHT
)
644 return GL_FALSE
; /* too big to cache */
647 px
= x
- cache
->xpos
; /* pos in buffer */
648 py
= y
- cache
->ypos
;
649 if (px
< 0 || px
+ width
> BITMAP_CACHE_WIDTH
||
650 py
< 0 || py
+ height
> BITMAP_CACHE_HEIGHT
||
651 !TEST_EQ_4V(st
->ctx
->Current
.RasterColor
, cache
->color
) ||
652 ((fabs(z
- cache
->zpos
) > Z_EPSILON
))) {
653 /* This bitmap would extend beyond cache bounds, or the bitmap
655 * so flush and continue.
657 st_flush_bitmap_cache(st
);
662 /* Initialize. Center bitmap vertically in the buffer. */
664 py
= (BITMAP_CACHE_HEIGHT
- height
) / 2;
666 cache
->ypos
= y
- py
;
668 cache
->empty
= GL_FALSE
;
669 COPY_4FV(cache
->color
, st
->ctx
->Current
.RasterColor
);
678 if (x
+ width
> cache
->xmax
)
679 cache
->xmax
= x
+ width
;
680 if (y
+ height
> cache
->ymax
)
681 cache
->ymax
= y
+ height
;
683 /* create the transfer if needed */
684 create_cache_trans(st
);
686 unpack_bitmap(st
, px
, py
, width
, height
, unpack
, bitmap
,
687 cache
->buffer
, BITMAP_CACHE_WIDTH
);
689 return GL_TRUE
; /* accumulated */
695 * Called via ctx->Driver.Bitmap()
698 st_Bitmap(GLcontext
*ctx
, GLint x
, GLint y
, GLsizei width
, GLsizei height
,
699 const struct gl_pixelstore_attrib
*unpack
, const GLubyte
*bitmap
)
701 struct st_context
*st
= ctx
->st
;
702 struct pipe_texture
*pt
;
704 if (width
== 0 || height
== 0)
707 st_validate_state(st
);
709 if (!st
->bitmap
.vs
) {
710 /* create pass-through vertex shader now */
711 const uint semantic_names
[] = { TGSI_SEMANTIC_POSITION
,
713 TGSI_SEMANTIC_GENERIC
};
714 const uint semantic_indexes
[] = { 0, 0, 0 };
715 st
->bitmap
.vs
= util_make_vertex_passthrough_shader(st
->pipe
, 3,
720 if (UseBitmapCache
&& accum_bitmap(st
, x
, y
, width
, height
, unpack
, bitmap
))
723 pt
= make_bitmap_texture(ctx
, width
, height
, unpack
, bitmap
);
725 assert(pt
->target
== PIPE_TEXTURE_2D
);
726 draw_bitmap_quad(ctx
, x
, y
, ctx
->Current
.RasterPos
[2],
728 st
->ctx
->Current
.RasterColor
);
729 /* release/free the texture */
730 pipe_texture_reference(&pt
, NULL
);
735 /** Per-context init */
737 st_init_bitmap_functions(struct dd_function_table
*functions
)
739 functions
->Bitmap
= st_Bitmap
;
743 /** Per-context init */
745 st_init_bitmap(struct st_context
*st
)
747 struct pipe_sampler_state
*sampler
= &st
->bitmap
.sampler
;
748 struct pipe_context
*pipe
= st
->pipe
;
749 struct pipe_screen
*screen
= pipe
->screen
;
751 /* init sampler state once */
752 memset(sampler
, 0, sizeof(*sampler
));
753 sampler
->wrap_s
= PIPE_TEX_WRAP_CLAMP
;
754 sampler
->wrap_t
= PIPE_TEX_WRAP_CLAMP
;
755 sampler
->wrap_r
= PIPE_TEX_WRAP_CLAMP
;
756 sampler
->min_img_filter
= PIPE_TEX_FILTER_NEAREST
;
757 sampler
->min_mip_filter
= PIPE_TEX_MIPFILTER_NONE
;
758 sampler
->mag_img_filter
= PIPE_TEX_FILTER_NEAREST
;
759 sampler
->normalized_coords
= 1;
761 /* init baseline rasterizer state once */
762 memset(&st
->bitmap
.rasterizer
, 0, sizeof(st
->bitmap
.rasterizer
));
763 st
->bitmap
.rasterizer
.gl_rasterization_rules
= 1;
765 /* find a usable texture format */
766 if (screen
->is_format_supported(screen
, PIPE_FORMAT_I8_UNORM
, PIPE_TEXTURE_2D
,
767 PIPE_TEXTURE_USAGE_SAMPLER
, 0)) {
768 st
->bitmap
.tex_format
= PIPE_FORMAT_I8_UNORM
;
770 else if (screen
->is_format_supported(screen
, PIPE_FORMAT_A8_UNORM
, PIPE_TEXTURE_2D
,
771 PIPE_TEXTURE_USAGE_SAMPLER
, 0)) {
772 st
->bitmap
.tex_format
= PIPE_FORMAT_A8_UNORM
;
774 else if (screen
->is_format_supported(screen
, PIPE_FORMAT_L8_UNORM
, PIPE_TEXTURE_2D
,
775 PIPE_TEXTURE_USAGE_SAMPLER
, 0)) {
776 st
->bitmap
.tex_format
= PIPE_FORMAT_L8_UNORM
;
779 /* XXX support more formats */
783 /* alloc bitmap cache object */
784 st
->bitmap
.cache
= ST_CALLOC_STRUCT(bitmap_cache
);
790 /** Per-context tear-down */
792 st_destroy_bitmap(struct st_context
*st
)
794 struct pipe_context
*pipe
= st
->pipe
;
795 struct pipe_screen
*screen
= pipe
->screen
;
796 struct bitmap_cache
*cache
= st
->bitmap
.cache
;
801 cso_delete_vertex_shader(st
->cso_context
, st
->bitmap
.vs
);
802 st
->bitmap
.vs
= NULL
;
805 if (st
->bitmap
.vbuf
) {
806 pipe_buffer_reference(&st
->bitmap
.vbuf
, NULL
);
807 st
->bitmap
.vbuf
= NULL
;
812 screen
->transfer_unmap(screen
, cache
->trans
);
813 screen
->tex_transfer_destroy(cache
->trans
);
815 pipe_texture_reference(&st
->bitmap
.cache
->texture
, NULL
);
816 _mesa_free(st
->bitmap
.cache
);
817 st
->bitmap
.cache
= NULL
;