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 "pipe/p_context.h"
51 #include "pipe/p_defines.h"
52 #include "pipe/p_inlines.h"
53 #include "util/p_tile.h"
54 #include "util/u_draw_quad.h"
55 #include "util/u_simple_shaders.h"
56 #include "shader/prog_instruction.h"
57 #include "cso_cache/cso_context.h"
62 * glBitmaps are drawn as textured quads. The user's bitmap pattern
63 * is stored in a texture image. An alpha8 texture format is used.
64 * The fragment shader samples a bit (texel) from the texture, then
65 * discards the fragment if the bit is off.
67 * Note that we actually store the inverse image of the bitmap to
68 * simplify the fragment program. An "on" bit gets stored as texel=0x0
69 * and an "off" bit is stored as texel=0xff. Then we kill the
70 * fragment if the negated texel value is less than zero.
75 * The bitmap cache attempts to accumulate multiple glBitmap calls in a
76 * buffer which is then rendered en mass upon a flush, state change, etc.
77 * A wide, short buffer is used to target the common case of a series
78 * of glBitmap calls being used to draw text.
80 static GLboolean UseBitmapCache
= GL_TRUE
;
83 #define BITMAP_CACHE_WIDTH 512
84 #define BITMAP_CACHE_HEIGHT 32
88 /** Window pos to render the cached image */
90 /** Bounds of region used in window coords */
91 GLint xmin
, ymin
, xmax
, ymax
;
95 struct pipe_texture
*texture
;
96 struct pipe_surface
*surf
;
100 /** An I8 texture image: */
108 * Make fragment program for glBitmap:
109 * Sample the texture and kill the fragment if the bit is 0.
110 * This program will be combined with the user's fragment program.
112 static struct st_fragment_program
*
113 make_bitmap_fragment_program(GLcontext
*ctx
, GLuint samplerIndex
)
115 struct st_fragment_program
*stfp
;
116 struct gl_program
*p
;
119 p
= ctx
->Driver
.NewProgram(ctx
, GL_FRAGMENT_PROGRAM_ARB
, 0);
123 p
->NumInstructions
= 3;
125 p
->Instructions
= _mesa_alloc_instructions(p
->NumInstructions
);
126 if (!p
->Instructions
) {
127 ctx
->Driver
.DeleteProgram(ctx
, p
);
130 _mesa_init_instructions(p
->Instructions
, p
->NumInstructions
);
132 /* TEX tmp0, fragment.texcoord[0], texture[0], 2D; */
133 p
->Instructions
[ic
].Opcode
= OPCODE_TEX
;
134 p
->Instructions
[ic
].DstReg
.File
= PROGRAM_TEMPORARY
;
135 p
->Instructions
[ic
].DstReg
.Index
= 0;
136 p
->Instructions
[ic
].SrcReg
[0].File
= PROGRAM_INPUT
;
137 p
->Instructions
[ic
].SrcReg
[0].Index
= FRAG_ATTRIB_TEX0
;
138 p
->Instructions
[ic
].TexSrcUnit
= samplerIndex
;
139 p
->Instructions
[ic
].TexSrcTarget
= TEXTURE_2D_INDEX
;
142 /* KIL if -tmp0 < 0 # texel=0 -> keep / texel=0 -> discard */
143 p
->Instructions
[ic
].Opcode
= OPCODE_KIL
;
144 p
->Instructions
[ic
].SrcReg
[0].File
= PROGRAM_TEMPORARY
;
145 p
->Instructions
[ic
].SrcReg
[0].Index
= 0;
146 p
->Instructions
[ic
].SrcReg
[0].NegateBase
= NEGATE_XYZW
;
150 p
->Instructions
[ic
++].Opcode
= OPCODE_END
;
152 assert(ic
== p
->NumInstructions
);
154 p
->InputsRead
= FRAG_BIT_TEX0
;
155 p
->OutputsWritten
= 0x0;
156 p
->SamplersUsed
= (1 << samplerIndex
);
158 stfp
= (struct st_fragment_program
*) p
;
159 stfp
->Base
.UsesKill
= GL_TRUE
;
160 st_translate_fragment_program(ctx
->st
, stfp
, NULL
);
167 find_free_bit(uint bitfield
)
170 for (i
= 0; i
< 32; i
++) {
171 if ((bitfield
& (1 << i
)) == 0) {
180 * Combine basic bitmap fragment program with the user-defined program.
182 static struct st_fragment_program
*
183 combined_bitmap_fragment_program(GLcontext
*ctx
)
185 struct st_context
*st
= ctx
->st
;
186 struct st_fragment_program
*stfp
= st
->fp
;
188 if (!stfp
->bitmap_program
) {
190 * Generate new program which is the user-defined program prefixed
191 * with the bitmap sampler/kill instructions.
193 struct st_fragment_program
*bitmap_prog
;
196 sampler
= find_free_bit(st
->fp
->Base
.Base
.SamplersUsed
);
197 bitmap_prog
= make_bitmap_fragment_program(ctx
, sampler
);
199 stfp
->bitmap_program
= (struct st_fragment_program
*)
200 _mesa_combine_programs(ctx
,
201 &bitmap_prog
->Base
.Base
, &stfp
->Base
.Base
);
202 stfp
->bitmap_program
->bitmap_sampler
= sampler
;
204 /* done with this after combining */
205 st_reference_fragprog(st
, &bitmap_prog
, NULL
);
209 struct gl_program
*p
= &stfp
->bitmap_program
->Base
.Base
;
210 printf("Combined bitmap program:\n");
211 _mesa_print_program(p
);
212 printf("InputsRead: 0x%x\n", p
->InputsRead
);
213 printf("OutputsWritten: 0x%x\n", p
->OutputsWritten
);
214 _mesa_print_parameter_list(p
->Parameters
);
218 /* translate to TGSI tokens */
219 st_translate_fragment_program(st
, stfp
->bitmap_program
, NULL
);
222 /* Ideally we'd have updated the pipe constants during the normal
223 * st/atom mechanism. But we can't since this is specific to glBitmap.
225 st_upload_constants(st
, stfp
->Base
.Base
.Parameters
, PIPE_SHADER_FRAGMENT
);
227 return stfp
->bitmap_program
;
232 * Copy user-provide bitmap bits into texture buffer, expanding
234 * "On" bits will set texels to 0xff.
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
)
248 #define SET_PIXEL(COL, ROW) \
249 destBuffer[(py + (ROW)) * destStride + px + (COL)] = 0x0;
251 for (row
= 0; row
< height
; row
++) {
252 const GLubyte
*src
= (const GLubyte
*) _mesa_image_address2d(unpack
,
253 bitmap
, width
, height
, GL_COLOR_INDEX
, GL_BITMAP
, row
, 0);
255 if (unpack
->LsbFirst
) {
257 GLubyte mask
= 1U << (unpack
->SkipPixels
& 0x7);
258 for (col
= 0; col
< width
; col
++) {
273 /* get ready for next row */
279 GLubyte mask
= 128U >> (unpack
->SkipPixels
& 0x7);
280 for (col
= 0; col
< width
; col
++) {
295 /* get ready for next row */
307 * Create a texture which represents a bitmap image.
309 static struct pipe_texture
*
310 make_bitmap_texture(GLcontext
*ctx
, GLsizei width
, GLsizei height
,
311 const struct gl_pixelstore_attrib
*unpack
,
312 const GLubyte
*bitmap
)
314 struct pipe_context
*pipe
= ctx
->st
->pipe
;
315 struct pipe_screen
*screen
= pipe
->screen
;
316 struct pipe_surface
*surface
;
318 struct pipe_texture
*pt
;
321 bitmap
= _mesa_map_bitmap_pbo(ctx
, unpack
, bitmap
);
327 * Create texture to hold bitmap pattern.
329 pt
= st_texture_create(ctx
->st
, PIPE_TEXTURE_2D
, ctx
->st
->bitmap
.tex_format
,
330 0, width
, height
, 1, 0,
331 PIPE_TEXTURE_USAGE_SAMPLER
);
333 _mesa_unmap_bitmap_pbo(ctx
, unpack
);
337 surface
= screen
->get_tex_surface(screen
, pt
, 0, 0, 0,
338 PIPE_BUFFER_USAGE_CPU_WRITE
);
340 /* map texture surface */
341 dest
= screen
->surface_map(screen
, surface
, PIPE_BUFFER_USAGE_CPU_WRITE
);
343 /* Put image into texture surface */
344 memset(dest
, 0xff, height
* surface
->pitch
);
345 unpack_bitmap(ctx
->st
, 0, 0, width
, height
, unpack
, bitmap
,
346 dest
, surface
->pitch
);
348 _mesa_unmap_bitmap_pbo(ctx
, unpack
);
350 /* Release surface */
351 screen
->surface_unmap(screen
, surface
);
352 pipe_surface_reference(&surface
, NULL
);
359 setup_bitmap_vertex_data(struct st_context
*st
,
360 int x
, int y
, int width
, int height
,
361 float z
, const float color
[4])
363 struct pipe_context
*pipe
= st
->pipe
;
364 const struct gl_framebuffer
*fb
= st
->ctx
->DrawBuffer
;
365 const GLfloat fb_width
= (GLfloat
)fb
->Width
;
366 const GLfloat fb_height
= (GLfloat
)fb
->Height
;
367 const GLfloat x0
= (GLfloat
)x
;
368 const GLfloat x1
= (GLfloat
)(x
+ width
);
369 const GLfloat y0
= (GLfloat
)y
;
370 const GLfloat y1
= (GLfloat
)(y
+ height
);
371 const GLfloat sLeft
= (GLfloat
)0.0, sRight
= (GLfloat
)1.0;
372 const GLfloat tTop
= (GLfloat
)0.0, tBot
= (GLfloat
)1.0 - tTop
;
373 const GLfloat clip_x0
= (GLfloat
)(x0
/ fb_width
* 2.0 - 1.0);
374 const GLfloat clip_y0
= (GLfloat
)(y0
/ fb_height
* 2.0 - 1.0);
375 const GLfloat clip_x1
= (GLfloat
)(x1
/ fb_width
* 2.0 - 1.0);
376 const GLfloat clip_y1
= (GLfloat
)(y1
/ fb_height
* 2.0 - 1.0);
380 if (!st
->bitmap
.vbuf
) {
381 st
->bitmap
.vbuf
= pipe_buffer_create(pipe
, 32, PIPE_BUFFER_USAGE_VERTEX
,
382 sizeof(st
->bitmap
.vertices
));
385 /* Positions are in clip coords since we need to do clipping in case
386 * the bitmap quad goes beyond the window bounds.
388 st
->bitmap
.vertices
[0][0][0] = clip_x0
;
389 st
->bitmap
.vertices
[0][0][1] = clip_y0
;
390 st
->bitmap
.vertices
[0][2][0] = sLeft
;
391 st
->bitmap
.vertices
[0][2][1] = tTop
;
393 st
->bitmap
.vertices
[1][0][0] = clip_x1
;
394 st
->bitmap
.vertices
[1][0][1] = clip_y0
;
395 st
->bitmap
.vertices
[1][2][0] = sRight
;
396 st
->bitmap
.vertices
[1][2][1] = tTop
;
398 st
->bitmap
.vertices
[2][0][0] = clip_x1
;
399 st
->bitmap
.vertices
[2][0][1] = clip_y1
;
400 st
->bitmap
.vertices
[2][2][0] = sRight
;
401 st
->bitmap
.vertices
[2][2][1] = tBot
;
403 st
->bitmap
.vertices
[3][0][0] = clip_x0
;
404 st
->bitmap
.vertices
[3][0][1] = clip_y1
;
405 st
->bitmap
.vertices
[3][2][0] = sLeft
;
406 st
->bitmap
.vertices
[3][2][1] = tBot
;
408 /* same for all verts: */
409 for (i
= 0; i
< 4; i
++) {
410 st
->bitmap
.vertices
[i
][0][2] = z
;
411 st
->bitmap
.vertices
[i
][0][3] = 1.0;
412 st
->bitmap
.vertices
[i
][1][0] = color
[0];
413 st
->bitmap
.vertices
[i
][1][1] = color
[1];
414 st
->bitmap
.vertices
[i
][1][2] = color
[2];
415 st
->bitmap
.vertices
[i
][1][3] = color
[3];
416 st
->bitmap
.vertices
[i
][2][2] = 0.0; /*R*/
417 st
->bitmap
.vertices
[i
][2][3] = 1.0; /*Q*/
420 /* put vertex data into vbuf */
421 buf
= pipe_buffer_map(pipe
, st
->bitmap
.vbuf
, PIPE_BUFFER_USAGE_CPU_WRITE
);
422 memcpy(buf
, st
->bitmap
.vertices
, sizeof(st
->bitmap
.vertices
));
423 pipe_buffer_unmap(pipe
, st
->bitmap
.vbuf
);
429 * Render a glBitmap by drawing a textured quad
432 draw_bitmap_quad(GLcontext
*ctx
, GLint x
, GLint y
, GLfloat z
,
433 GLsizei width
, GLsizei height
,
434 struct pipe_texture
*pt
,
435 const GLfloat
*color
)
437 struct st_context
*st
= ctx
->st
;
438 struct pipe_context
*pipe
= ctx
->st
->pipe
;
439 struct cso_context
*cso
= ctx
->st
->cso_context
;
440 struct st_fragment_program
*stfp
;
443 stfp
= combined_bitmap_fragment_program(ctx
);
446 /* XXX if the bitmap is larger than the max texture size, break
449 maxSize
= 1 << (pipe
->screen
->get_param(pipe
->screen
, PIPE_CAP_MAX_TEXTURE_2D_LEVELS
) - 1);
450 assert(width
<= (GLsizei
)maxSize
);
451 assert(height
<= (GLsizei
)maxSize
);
453 cso_save_rasterizer(cso
);
454 cso_save_samplers(cso
);
455 cso_save_sampler_textures(cso
);
456 cso_save_viewport(cso
);
457 cso_save_fragment_shader(cso
);
458 cso_save_vertex_shader(cso
);
460 /* rasterizer state: just scissor */
461 st
->bitmap
.rasterizer
.scissor
= ctx
->Scissor
.Enabled
;
462 cso_set_rasterizer(cso
, &st
->bitmap
.rasterizer
);
464 /* fragment shader state: TEX lookup program */
465 cso_set_fragment_shader_handle(cso
, stfp
->driver_shader
);
467 /* vertex shader state: position + texcoord pass-through */
468 cso_set_vertex_shader_handle(cso
, st
->bitmap
.vs
);
470 /* user samplers, plus our bitmap sampler */
472 struct pipe_sampler_state
*samplers
[PIPE_MAX_SAMPLERS
];
473 uint num
= MAX2(stfp
->bitmap_sampler
+ 1, st
->state
.num_samplers
);
475 for (i
= 0; i
< st
->state
.num_samplers
; i
++) {
476 samplers
[i
] = &st
->state
.samplers
[i
];
478 samplers
[stfp
->bitmap_sampler
] = &st
->bitmap
.sampler
;
479 cso_set_samplers(cso
, num
, (const struct pipe_sampler_state
**) samplers
); }
481 /* user textures, plus the bitmap texture */
483 struct pipe_texture
*textures
[PIPE_MAX_SAMPLERS
];
484 uint num
= MAX2(stfp
->bitmap_sampler
+ 1, st
->state
.num_textures
);
485 memcpy(textures
, st
->state
.sampler_texture
, sizeof(textures
));
486 textures
[stfp
->bitmap_sampler
] = pt
;
487 cso_set_sampler_textures(cso
, num
, textures
);
490 /* viewport state: viewport matching window dims */
492 const struct gl_framebuffer
*fb
= st
->ctx
->DrawBuffer
;
493 const GLboolean invert
= (st_fb_orientation(fb
) == Y_0_TOP
);
494 const GLfloat width
= (GLfloat
)fb
->Width
;
495 const GLfloat height
= (GLfloat
)fb
->Height
;
496 struct pipe_viewport_state vp
;
497 vp
.scale
[0] = 0.5 * width
;
498 vp
.scale
[1] = (GLfloat
)(height
* (invert
? -0.5 : 0.5));
501 vp
.translate
[0] = (GLfloat
)(0.5 * width
);
502 vp
.translate
[1] = (GLfloat
)(0.5 * height
);
503 vp
.translate
[2] = 0.0;
504 vp
.translate
[3] = 0.0;
505 cso_set_viewport(cso
, &vp
);
508 /* draw textured quad */
509 setup_bitmap_vertex_data(st
, x
, y
, width
, height
,
510 ctx
->Current
.RasterPos
[2],
513 util_draw_vertex_buffer(pipe
, st
->bitmap
.vbuf
,
514 PIPE_PRIM_TRIANGLE_FAN
,
516 3); /* attribs/vert */
520 cso_restore_rasterizer(cso
);
521 cso_restore_samplers(cso
);
522 cso_restore_sampler_textures(cso
);
523 cso_restore_viewport(cso
);
524 cso_restore_fragment_shader(cso
);
525 cso_restore_vertex_shader(cso
);
530 reset_cache(struct st_context
*st
)
532 struct pipe_context
*pipe
= st
->pipe
;
533 struct pipe_screen
*screen
= pipe
->screen
;
534 struct bitmap_cache
*cache
= st
->bitmap
.cache
;
536 //memset(cache->buffer, 0xff, sizeof(cache->buffer));
537 cache
->empty
= GL_TRUE
;
539 cache
->xmin
= 1000000;
540 cache
->xmax
= -1000000;
541 cache
->ymin
= 1000000;
542 cache
->ymax
= -1000000;
544 assert(!cache
->texture
);
546 /* allocate a new texture */
547 cache
->texture
= st_texture_create(st
, PIPE_TEXTURE_2D
,
548 st
->bitmap
.tex_format
, 0,
549 BITMAP_CACHE_WIDTH
, BITMAP_CACHE_HEIGHT
,
551 PIPE_TEXTURE_USAGE_SAMPLER
);
553 /* Map the texture surface.
554 * Subsequent glBitmap calls will write into the texture image.
556 cache
->surf
= screen
->get_tex_surface(screen
, cache
->texture
, 0, 0, 0,
557 PIPE_BUFFER_USAGE_CPU_WRITE
);
558 cache
->buffer
= screen
->surface_map(screen
, cache
->surf
,
559 PIPE_BUFFER_USAGE_CPU_WRITE
);
561 /* init image to all 0xff */
562 memset(cache
->buffer
, 0xff, BITMAP_CACHE_WIDTH
* BITMAP_CACHE_HEIGHT
);
567 * If there's anything in the bitmap cache, draw/flush it now.
570 st_flush_bitmap_cache(struct st_context
*st
)
572 if (!st
->bitmap
.cache
->empty
) {
573 struct bitmap_cache
*cache
= st
->bitmap
.cache
;
575 if (st
->ctx
->DrawBuffer
) {
576 struct pipe_context
*pipe
= st
->pipe
;
577 struct pipe_screen
*screen
= pipe
->screen
;
579 assert(cache
->xmin
<= cache
->xmax
);
581 printf("flush size %d x %d at %d, %d\n",
582 cache->xmax - cache->xmin,
583 cache->ymax - cache->ymin,
584 cache->xpos, cache->ypos);
587 /* The texture surface has been mapped until now.
588 * So unmap and release the texture surface before drawing.
590 screen
->surface_unmap(screen
, cache
->surf
);
591 screen
->tex_surface_release(screen
, &cache
->surf
);
593 draw_bitmap_quad(st
->ctx
,
596 st
->ctx
->Current
.RasterPos
[2],
597 BITMAP_CACHE_WIDTH
, BITMAP_CACHE_HEIGHT
,
602 /* release/free the texture */
603 pipe_texture_reference(&cache
->texture
, NULL
);
611 * Try to accumulate this glBitmap call in the bitmap cache.
612 * \return GL_TRUE for success, GL_FALSE if bitmap is too large, etc.
615 accum_bitmap(struct st_context
*st
,
616 GLint x
, GLint y
, GLsizei width
, GLsizei height
,
617 const struct gl_pixelstore_attrib
*unpack
,
618 const GLubyte
*bitmap
)
620 struct bitmap_cache
*cache
= st
->bitmap
.cache
;
623 if (width
> BITMAP_CACHE_WIDTH
||
624 height
> BITMAP_CACHE_HEIGHT
)
625 return GL_FALSE
; /* too big to cache */
628 px
= x
- cache
->xpos
; /* pos in buffer */
629 py
= y
- cache
->ypos
;
630 if (px
< 0 || px
+ width
> BITMAP_CACHE_WIDTH
||
631 py
< 0 || py
+ height
> BITMAP_CACHE_HEIGHT
||
632 !TEST_EQ_4V(st
->ctx
->Current
.RasterColor
, cache
->color
)) {
633 /* This bitmap would extend beyond cache bounds, or the bitmap
635 * so flush and continue.
637 st_flush_bitmap_cache(st
);
642 /* Initialize. Center bitmap vertically in the buffer. */
644 py
= (BITMAP_CACHE_HEIGHT
- height
) / 2;
646 cache
->ypos
= y
- py
;
647 cache
->empty
= GL_FALSE
;
648 COPY_4FV(cache
->color
, st
->ctx
->Current
.RasterColor
);
657 if (x
+ width
> cache
->xmax
)
658 cache
->xmax
= x
+ width
;
659 if (y
+ height
> cache
->ymax
)
660 cache
->ymax
= y
+ height
;
662 unpack_bitmap(st
, px
, py
, width
, height
, unpack
, bitmap
,
663 cache
->buffer
, BITMAP_CACHE_WIDTH
);
665 return GL_TRUE
; /* accumulated */
671 * Called via ctx->Driver.Bitmap()
674 st_Bitmap(GLcontext
*ctx
, GLint x
, GLint y
, GLsizei width
, GLsizei height
,
675 const struct gl_pixelstore_attrib
*unpack
, const GLubyte
*bitmap
)
677 struct st_context
*st
= ctx
->st
;
678 struct pipe_texture
*pt
;
680 if (width
== 0 || height
== 0)
683 st_validate_state(st
);
685 if (!st
->bitmap
.vs
) {
686 /* create pass-through vertex shader now */
687 const uint semantic_names
[] = { TGSI_SEMANTIC_POSITION
,
689 TGSI_SEMANTIC_GENERIC
};
690 const uint semantic_indexes
[] = { 0, 0, 0 };
691 st
->bitmap
.vs
= util_make_vertex_passthrough_shader(st
->pipe
, 3,
694 &st
->bitmap
.vert_shader
);
697 if (UseBitmapCache
&& accum_bitmap(st
, x
, y
, width
, height
, unpack
, bitmap
))
700 pt
= make_bitmap_texture(ctx
, width
, height
, unpack
, bitmap
);
702 assert(pt
->target
== PIPE_TEXTURE_2D
);
703 draw_bitmap_quad(ctx
, x
, y
, ctx
->Current
.RasterPos
[2],
705 st
->ctx
->Current
.RasterColor
);
706 /* release/free the texture */
707 pipe_texture_reference(&pt
, NULL
);
712 /** Per-context init */
714 st_init_bitmap_functions(struct dd_function_table
*functions
)
716 functions
->Bitmap
= st_Bitmap
;
720 /** Per-context init */
722 st_init_bitmap(struct st_context
*st
)
724 struct pipe_sampler_state
*sampler
= &st
->bitmap
.sampler
;
725 struct pipe_context
*pipe
= st
->pipe
;
726 struct pipe_screen
*screen
= pipe
->screen
;
728 /* init sampler state once */
729 memset(sampler
, 0, sizeof(*sampler
));
730 sampler
->wrap_s
= PIPE_TEX_WRAP_CLAMP
;
731 sampler
->wrap_t
= PIPE_TEX_WRAP_CLAMP
;
732 sampler
->wrap_r
= PIPE_TEX_WRAP_CLAMP
;
733 sampler
->min_img_filter
= PIPE_TEX_FILTER_NEAREST
;
734 sampler
->min_mip_filter
= PIPE_TEX_MIPFILTER_NONE
;
735 sampler
->mag_img_filter
= PIPE_TEX_FILTER_NEAREST
;
736 sampler
->normalized_coords
= 1;
738 /* init baseline rasterizer state once */
739 memset(&st
->bitmap
.rasterizer
, 0, sizeof(st
->bitmap
.rasterizer
));
740 st
->bitmap
.rasterizer
.gl_rasterization_rules
= 1;
741 st
->bitmap
.rasterizer
.bypass_vs
= 1;
743 /* find a usable texture format */
744 if (screen
->is_format_supported(screen
, PIPE_FORMAT_I8_UNORM
, PIPE_TEXTURE
)) {
745 st
->bitmap
.tex_format
= PIPE_FORMAT_I8_UNORM
;
748 /* XXX support more formats */
752 /* alloc bitmap cache object */
753 st
->bitmap
.cache
= CALLOC_STRUCT(bitmap_cache
);
759 /** Per-context tear-down */
761 st_destroy_bitmap(struct st_context
*st
)
763 struct pipe_context
*pipe
= st
->pipe
;
764 struct pipe_screen
*screen
= pipe
->screen
;
765 struct bitmap_cache
*cache
= st
->bitmap
.cache
;
767 screen
->surface_unmap(screen
, cache
->surf
);
768 screen
->tex_surface_release(screen
, &cache
->surf
);
771 cso_delete_vertex_shader(st
->cso_context
, st
->bitmap
.vs
);
772 st
->bitmap
.vs
= NULL
;
775 if (st
->bitmap
.vbuf
) {
776 pipe_buffer_destroy(pipe
, st
->bitmap
.vbuf
);
777 st
->bitmap
.vbuf
= NULL
;
780 if (st
->bitmap
.cache
) {
781 pipe_texture_release(&st
->bitmap
.cache
->texture
);
782 FREE(st
->bitmap
.cache
);
783 st
->bitmap
.cache
= NULL
;