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
;
93 struct pipe_texture
*texture
;
94 struct pipe_surface
*surf
;
98 /** An I8 texture image: */
106 * Make fragment program for glBitmap:
107 * Sample the texture and kill the fragment if the bit is 0.
108 * This program will be combined with the user's fragment program.
110 static struct st_fragment_program
*
111 make_bitmap_fragment_program(GLcontext
*ctx
, GLuint samplerIndex
)
113 struct st_fragment_program
*stfp
;
114 struct gl_program
*p
;
117 p
= ctx
->Driver
.NewProgram(ctx
, GL_FRAGMENT_PROGRAM_ARB
, 0);
121 p
->NumInstructions
= 3;
123 p
->Instructions
= _mesa_alloc_instructions(p
->NumInstructions
);
124 if (!p
->Instructions
) {
125 ctx
->Driver
.DeleteProgram(ctx
, p
);
128 _mesa_init_instructions(p
->Instructions
, p
->NumInstructions
);
130 /* TEX tmp0, fragment.texcoord[0], texture[0], 2D; */
131 p
->Instructions
[ic
].Opcode
= OPCODE_TEX
;
132 p
->Instructions
[ic
].DstReg
.File
= PROGRAM_TEMPORARY
;
133 p
->Instructions
[ic
].DstReg
.Index
= 0;
134 p
->Instructions
[ic
].SrcReg
[0].File
= PROGRAM_INPUT
;
135 p
->Instructions
[ic
].SrcReg
[0].Index
= FRAG_ATTRIB_TEX0
;
136 p
->Instructions
[ic
].TexSrcUnit
= samplerIndex
;
137 p
->Instructions
[ic
].TexSrcTarget
= TEXTURE_2D_INDEX
;
140 /* KIL if -tmp0 < 0 # texel=0 -> keep / texel=0 -> discard */
141 p
->Instructions
[ic
].Opcode
= OPCODE_KIL
;
142 p
->Instructions
[ic
].SrcReg
[0].File
= PROGRAM_TEMPORARY
;
143 p
->Instructions
[ic
].SrcReg
[0].Index
= 0;
144 p
->Instructions
[ic
].SrcReg
[0].NegateBase
= NEGATE_XYZW
;
148 p
->Instructions
[ic
++].Opcode
= OPCODE_END
;
150 assert(ic
== p
->NumInstructions
);
152 p
->InputsRead
= FRAG_BIT_TEX0
;
153 p
->OutputsWritten
= 0x0;
154 p
->SamplersUsed
= (1 << samplerIndex
);
156 stfp
= (struct st_fragment_program
*) p
;
157 stfp
->Base
.UsesKill
= GL_TRUE
;
158 st_translate_fragment_program(ctx
->st
, stfp
, NULL
);
165 find_free_bit(uint bitfield
)
168 for (i
= 0; i
< 32; i
++) {
169 if ((bitfield
& (1 << i
)) == 0) {
178 * Combine basic bitmap fragment program with the user-defined program.
180 static struct st_fragment_program
*
181 combined_bitmap_fragment_program(GLcontext
*ctx
)
183 struct st_context
*st
= ctx
->st
;
184 struct st_fragment_program
*stfp
= st
->fp
;
186 if (!stfp
->bitmap_program
) {
188 * Generate new program which is the user-defined program prefixed
189 * with the bitmap sampler/kill instructions.
191 struct st_fragment_program
*bitmap_prog
;
194 sampler
= find_free_bit(st
->fp
->Base
.Base
.SamplersUsed
);
195 bitmap_prog
= make_bitmap_fragment_program(ctx
, sampler
);
197 stfp
->bitmap_program
= (struct st_fragment_program
*)
198 _mesa_combine_programs(ctx
,
199 &bitmap_prog
->Base
.Base
, &stfp
->Base
.Base
);
200 stfp
->bitmap_program
->bitmap_sampler
= sampler
;
202 /* done with this after combining */
203 st_reference_fragprog(st
, &bitmap_prog
, NULL
);
207 struct gl_program
*p
= &stfp
->bitmap_program
->Base
.Base
;
208 printf("Combined bitmap program:\n");
209 _mesa_print_program(p
);
210 printf("InputsRead: 0x%x\n", p
->InputsRead
);
211 printf("OutputsWritten: 0x%x\n", p
->OutputsWritten
);
212 _mesa_print_parameter_list(p
->Parameters
);
216 /* translate to TGSI tokens */
217 st_translate_fragment_program(st
, stfp
->bitmap_program
, NULL
);
220 /* Ideally we'd have updated the pipe constants during the normal
221 * st/atom mechanism. But we can't since this is specific to glBitmap.
223 st_upload_constants(st
, stfp
->Base
.Base
.Parameters
, PIPE_SHADER_FRAGMENT
);
225 return stfp
->bitmap_program
;
230 * Copy user-provide bitmap bits into texture buffer, expanding
232 * "On" bits will set texels to 0xff.
233 * "Off" bits will not modify texels.
234 * Note that the image is actually going to be upside down in
235 * the texture. We deal with that with texcoords.
238 unpack_bitmap(struct st_context
*st
,
239 GLint px
, GLint py
, GLsizei width
, GLsizei height
,
240 const struct gl_pixelstore_attrib
*unpack
,
241 const GLubyte
*bitmap
,
242 ubyte
*destBuffer
, uint destStride
)
246 #define SET_PIXEL(COL, ROW) \
247 destBuffer[(py + (ROW)) * destStride + px + (COL)] = 0x0;
249 for (row
= 0; row
< height
; row
++) {
250 const GLubyte
*src
= (const GLubyte
*) _mesa_image_address2d(unpack
,
251 bitmap
, width
, height
, GL_COLOR_INDEX
, GL_BITMAP
, row
, 0);
253 if (unpack
->LsbFirst
) {
255 GLubyte mask
= 1U << (unpack
->SkipPixels
& 0x7);
256 for (col
= 0; col
< width
; col
++) {
271 /* get ready for next row */
277 GLubyte mask
= 128U >> (unpack
->SkipPixels
& 0x7);
278 for (col
= 0; col
< width
; col
++) {
293 /* get ready for next row */
305 * Create a texture which represents a bitmap image.
307 static struct pipe_texture
*
308 make_bitmap_texture(GLcontext
*ctx
, GLsizei width
, GLsizei height
,
309 const struct gl_pixelstore_attrib
*unpack
,
310 const GLubyte
*bitmap
)
312 struct pipe_context
*pipe
= ctx
->st
->pipe
;
313 struct pipe_screen
*screen
= pipe
->screen
;
314 struct pipe_surface
*surface
;
316 struct pipe_texture
*pt
;
319 bitmap
= _mesa_map_bitmap_pbo(ctx
, unpack
, bitmap
);
325 * Create texture to hold bitmap pattern.
327 pt
= st_texture_create(ctx
->st
, PIPE_TEXTURE_2D
, ctx
->st
->bitmap
.tex_format
,
328 0, width
, height
, 1, 0,
329 PIPE_TEXTURE_USAGE_SAMPLER
);
331 _mesa_unmap_bitmap_pbo(ctx
, unpack
);
335 surface
= screen
->get_tex_surface(screen
, pt
, 0, 0, 0,
336 PIPE_BUFFER_USAGE_CPU_WRITE
);
338 /* map texture surface */
339 dest
= screen
->surface_map(screen
, surface
, PIPE_BUFFER_USAGE_CPU_WRITE
);
341 /* Put image into texture surface */
342 memset(dest
, 0xff, height
* surface
->pitch
);
343 unpack_bitmap(ctx
->st
, 0, 0, width
, height
, unpack
, bitmap
,
344 dest
, surface
->pitch
);
346 _mesa_unmap_bitmap_pbo(ctx
, unpack
);
348 /* Release surface */
349 screen
->surface_unmap(screen
, surface
);
350 pipe_surface_reference(&surface
, NULL
);
357 setup_bitmap_vertex_data(struct st_context
*st
,
358 int x
, int y
, int width
, int height
,
359 float z
, const float color
[4])
361 struct pipe_context
*pipe
= st
->pipe
;
362 const struct gl_framebuffer
*fb
= st
->ctx
->DrawBuffer
;
363 const GLfloat fb_width
= fb
->Width
;
364 const GLfloat fb_height
= fb
->Height
;
365 const GLfloat x0
= x
;
366 const GLfloat x1
= x
+ width
;
367 const GLfloat y0
= y
;
368 const GLfloat y1
= y
+ height
;
369 const GLfloat sLeft
= 0.0F
, sRight
= 1.0F
;
370 const GLfloat tTop
= 0.0, tBot
= 1.0 - tTop
;
371 const GLfloat clip_x0
= x0
/ fb_width
* 2.0 - 1.0;
372 const GLfloat clip_y0
= y0
/ fb_height
* 2.0 - 1.0;
373 const GLfloat clip_x1
= x1
/ fb_width
* 2.0 - 1.0;
374 const GLfloat clip_y1
= y1
/ fb_height
* 2.0 - 1.0;
378 if (!st
->bitmap
.vbuf
) {
379 st
->bitmap
.vbuf
= pipe_buffer_create(pipe
, 32, PIPE_BUFFER_USAGE_VERTEX
,
380 sizeof(st
->bitmap
.vertices
));
383 /* Positions are in clip coords since we need to do clipping in case
384 * the bitmap quad goes beyond the window bounds.
386 st
->bitmap
.vertices
[0][0][0] = clip_x0
;
387 st
->bitmap
.vertices
[0][0][1] = clip_y0
;
388 st
->bitmap
.vertices
[0][2][0] = sLeft
;
389 st
->bitmap
.vertices
[0][2][1] = tTop
;
391 st
->bitmap
.vertices
[1][0][0] = clip_x1
;
392 st
->bitmap
.vertices
[1][0][1] = clip_y0
;
393 st
->bitmap
.vertices
[1][2][0] = sRight
;
394 st
->bitmap
.vertices
[1][2][1] = tTop
;
396 st
->bitmap
.vertices
[2][0][0] = clip_x1
;
397 st
->bitmap
.vertices
[2][0][1] = clip_y1
;
398 st
->bitmap
.vertices
[2][2][0] = sRight
;
399 st
->bitmap
.vertices
[2][2][1] = tBot
;
401 st
->bitmap
.vertices
[3][0][0] = clip_x0
;
402 st
->bitmap
.vertices
[3][0][1] = clip_y1
;
403 st
->bitmap
.vertices
[3][2][0] = sLeft
;
404 st
->bitmap
.vertices
[3][2][1] = tBot
;
406 /* same for all verts: */
407 for (i
= 0; i
< 4; i
++) {
408 st
->bitmap
.vertices
[i
][0][2] = z
;
409 st
->bitmap
.vertices
[i
][0][3] = 1.0;
410 st
->bitmap
.vertices
[i
][1][0] = color
[0];
411 st
->bitmap
.vertices
[i
][1][1] = color
[1];
412 st
->bitmap
.vertices
[i
][1][2] = color
[2];
413 st
->bitmap
.vertices
[i
][1][3] = color
[3];
414 st
->bitmap
.vertices
[i
][2][2] = 0.0; /*R*/
415 st
->bitmap
.vertices
[i
][2][3] = 1.0; /*Q*/
418 /* put vertex data into vbuf */
419 buf
= pipe_buffer_map(pipe
, st
->bitmap
.vbuf
, PIPE_BUFFER_USAGE_CPU_WRITE
);
420 memcpy(buf
, st
->bitmap
.vertices
, sizeof(st
->bitmap
.vertices
));
421 pipe_buffer_unmap(pipe
, st
->bitmap
.vbuf
);
427 * Render a glBitmap by drawing a textured quad
430 draw_bitmap_quad(GLcontext
*ctx
, GLint x
, GLint y
, GLfloat z
,
431 GLsizei width
, GLsizei height
,
432 struct pipe_texture
*pt
)
434 struct st_context
*st
= ctx
->st
;
435 struct pipe_context
*pipe
= ctx
->st
->pipe
;
436 struct cso_context
*cso
= ctx
->st
->cso_context
;
437 struct st_fragment_program
*stfp
;
440 stfp
= combined_bitmap_fragment_program(ctx
);
443 /* XXX if the bitmap is larger than the max texture size, break
446 maxSize
= 1 << (pipe
->screen
->get_param(pipe
->screen
, PIPE_CAP_MAX_TEXTURE_2D_LEVELS
) - 1);
447 assert(width
<= maxSize
);
448 assert(height
<= maxSize
);
450 cso_save_rasterizer(cso
);
451 cso_save_samplers(cso
);
452 cso_save_sampler_textures(cso
);
453 cso_save_viewport(cso
);
454 cso_save_fragment_shader(cso
);
455 cso_save_vertex_shader(cso
);
457 /* rasterizer state: just scissor */
458 st
->bitmap
.rasterizer
.scissor
= ctx
->Scissor
.Enabled
;
459 cso_set_rasterizer(cso
, &st
->bitmap
.rasterizer
);
461 /* fragment shader state: TEX lookup program */
462 cso_set_fragment_shader_handle(cso
, stfp
->driver_shader
);
464 /* vertex shader state: position + texcoord pass-through */
465 cso_set_vertex_shader_handle(cso
, st
->bitmap
.vs
);
467 /* user samplers, plus our bitmap sampler */
469 struct pipe_sampler_state
*samplers
[PIPE_MAX_SAMPLERS
];
470 uint num
= MAX2(stfp
->bitmap_sampler
+ 1, st
->state
.num_samplers
);
472 for (i
= 0; i
< st
->state
.num_samplers
; i
++) {
473 samplers
[i
] = &st
->state
.samplers
[i
];
475 samplers
[stfp
->bitmap_sampler
] = &st
->bitmap
.sampler
;
476 cso_set_samplers(cso
, num
, (const struct pipe_sampler_state
**) samplers
); }
478 /* user textures, plus the bitmap texture */
480 struct pipe_texture
*textures
[PIPE_MAX_SAMPLERS
];
481 uint num
= MAX2(stfp
->bitmap_sampler
+ 1, st
->state
.num_textures
);
482 memcpy(textures
, st
->state
.sampler_texture
, sizeof(textures
));
483 textures
[stfp
->bitmap_sampler
] = pt
;
484 cso_set_sampler_textures(cso
, num
, textures
);
487 /* viewport state: viewport matching window dims */
489 const struct gl_framebuffer
*fb
= st
->ctx
->DrawBuffer
;
490 const GLboolean invert
= (st_fb_orientation(fb
) == Y_0_TOP
);
491 const float width
= fb
->Width
;
492 const float height
= fb
->Height
;
493 struct pipe_viewport_state vp
;
494 vp
.scale
[0] = 0.5 * width
;
495 vp
.scale
[1] = height
* (invert
? -0.5 : 0.5);
498 vp
.translate
[0] = 0.5 * width
;
499 vp
.translate
[1] = 0.5 * height
;
500 vp
.translate
[2] = 0.0;
501 vp
.translate
[3] = 0.0;
502 cso_set_viewport(cso
, &vp
);
505 /* draw textured quad */
506 setup_bitmap_vertex_data(st
, x
, y
, width
, height
,
507 ctx
->Current
.RasterPos
[2],
508 ctx
->Current
.RasterColor
);
510 util_draw_vertex_buffer(pipe
, st
->bitmap
.vbuf
,
511 PIPE_PRIM_TRIANGLE_FAN
,
513 3); /* attribs/vert */
517 cso_restore_rasterizer(cso
);
518 cso_restore_samplers(cso
);
519 cso_restore_sampler_textures(cso
);
520 cso_restore_viewport(cso
);
521 cso_restore_fragment_shader(cso
);
522 cso_restore_vertex_shader(cso
);
527 reset_cache(struct st_context
*st
)
529 struct pipe_context
*pipe
= st
->pipe
;
530 struct pipe_screen
*screen
= pipe
->screen
;
531 struct bitmap_cache
*cache
= st
->bitmap
.cache
;
533 //memset(cache->buffer, 0xff, sizeof(cache->buffer));
534 cache
->empty
= GL_TRUE
;
536 cache
->xmin
= 1000000;
537 cache
->xmax
= -1000000;
538 cache
->ymin
= 1000000;
539 cache
->ymax
= -1000000;
541 assert(!cache
->texture
);
543 /* allocate a new texture */
544 cache
->texture
= st_texture_create(st
, PIPE_TEXTURE_2D
,
545 st
->bitmap
.tex_format
, 0,
546 BITMAP_CACHE_WIDTH
, BITMAP_CACHE_HEIGHT
,
548 PIPE_TEXTURE_USAGE_SAMPLER
);
550 /* Map the texture surface.
551 * Subsequent glBitmap calls will write into the texture image.
553 cache
->surf
= screen
->get_tex_surface(screen
, cache
->texture
, 0, 0, 0,
554 PIPE_BUFFER_USAGE_CPU_WRITE
);
555 cache
->buffer
= screen
->surface_map(screen
, cache
->surf
,
556 PIPE_BUFFER_USAGE_CPU_WRITE
);
558 /* init image to all 0xff */
559 memset(cache
->buffer
, 0xff, BITMAP_CACHE_WIDTH
* BITMAP_CACHE_HEIGHT
);
564 * If there's anything in the bitmap cache, draw/flush it now.
567 st_flush_bitmap_cache(struct st_context
*st
)
569 if (!st
->bitmap
.cache
->empty
) {
570 struct bitmap_cache
*cache
= st
->bitmap
.cache
;
572 if (st
->ctx
->DrawBuffer
) {
573 struct pipe_context
*pipe
= st
->pipe
;
574 struct pipe_screen
*screen
= pipe
->screen
;
576 assert(cache
->xmin
<= cache
->xmax
);
578 printf("flush size %d x %d at %d, %d\n",
579 cache->xmax - cache->xmin,
580 cache->ymax - cache->ymin,
581 cache->xpos, cache->ypos);
584 /* The texture surface has been mapped until now.
585 * So unmap and release the texture surface before drawing.
587 screen
->surface_unmap(screen
, cache
->surf
);
588 screen
->tex_surface_release(screen
, &cache
->surf
);
590 draw_bitmap_quad(st
->ctx
,
593 st
->ctx
->Current
.RasterPos
[2],
594 BITMAP_CACHE_WIDTH
, BITMAP_CACHE_HEIGHT
,
598 /* release/free the texture */
599 pipe_texture_reference(&cache
->texture
, NULL
);
607 * Try to accumulate this glBitmap call in the bitmap cache.
608 * \return GL_TRUE for success, GL_FALSE if bitmap is too large, etc.
611 accum_bitmap(struct st_context
*st
,
612 GLint x
, GLint y
, GLsizei width
, GLsizei height
,
613 const struct gl_pixelstore_attrib
*unpack
,
614 const GLubyte
*bitmap
)
616 struct bitmap_cache
*cache
= st
->bitmap
.cache
;
619 if (width
> BITMAP_CACHE_WIDTH
||
620 height
> BITMAP_CACHE_HEIGHT
)
621 return GL_FALSE
; /* too big to cache */
624 px
= x
- cache
->xpos
; /* pos in buffer */
625 py
= y
- cache
->ypos
;
626 if (px
< 0 || px
+ width
> BITMAP_CACHE_WIDTH
||
627 py
< 0 || py
+ height
> BITMAP_CACHE_HEIGHT
) {
628 /* This bitmap would extend beyond cache bounds,
629 * so flush and continue.
631 st_flush_bitmap_cache(st
);
636 /* Initialize. Center bitmap vertically in the buffer. */
638 py
= (BITMAP_CACHE_HEIGHT
- height
) / 2;
640 cache
->ypos
= y
- py
;
641 cache
->empty
= GL_FALSE
;
650 if (x
+ width
> cache
->xmax
)
651 cache
->xmax
= x
+ width
;
652 if (y
+ height
> cache
->ymax
)
653 cache
->ymax
= y
+ height
;
655 unpack_bitmap(st
, px
, py
, width
, height
, unpack
, bitmap
,
656 cache
->buffer
, BITMAP_CACHE_WIDTH
);
658 return GL_TRUE
; /* accumulated */
664 * Called via ctx->Driver.Bitmap()
667 st_Bitmap(GLcontext
*ctx
, GLint x
, GLint y
, GLsizei width
, GLsizei height
,
668 const struct gl_pixelstore_attrib
*unpack
, const GLubyte
*bitmap
)
670 struct st_context
*st
= ctx
->st
;
671 struct pipe_texture
*pt
;
673 if (width
== 0 || height
== 0)
676 st_validate_state(st
);
678 if (!st
->bitmap
.vs
) {
679 /* create pass-through vertex shader now */
680 const uint semantic_names
[] = { TGSI_SEMANTIC_POSITION
,
682 TGSI_SEMANTIC_GENERIC
};
683 const uint semantic_indexes
[] = { 0, 0, 0 };
684 st
->bitmap
.vs
= util_make_vertex_passthrough_shader(st
->pipe
, 3,
687 &st
->bitmap
.vert_shader
);
690 if (UseBitmapCache
&& accum_bitmap(st
, x
, y
, width
, height
, unpack
, bitmap
))
693 pt
= make_bitmap_texture(ctx
, width
, height
, unpack
, bitmap
);
695 assert(pt
->target
== PIPE_TEXTURE_2D
);
696 draw_bitmap_quad(ctx
, x
, y
, ctx
->Current
.RasterPos
[2],
698 /* release/free the texture */
699 pipe_texture_reference(&pt
, NULL
);
704 /** Per-context init */
706 st_init_bitmap_functions(struct dd_function_table
*functions
)
708 functions
->Bitmap
= st_Bitmap
;
712 /** Per-context init */
714 st_init_bitmap(struct st_context
*st
)
716 struct pipe_sampler_state
*sampler
= &st
->bitmap
.sampler
;
717 struct pipe_context
*pipe
= st
->pipe
;
718 struct pipe_screen
*screen
= pipe
->screen
;
720 /* init sampler state once */
721 memset(sampler
, 0, sizeof(*sampler
));
722 sampler
->wrap_s
= PIPE_TEX_WRAP_CLAMP
;
723 sampler
->wrap_t
= PIPE_TEX_WRAP_CLAMP
;
724 sampler
->wrap_r
= PIPE_TEX_WRAP_CLAMP
;
725 sampler
->min_img_filter
= PIPE_TEX_FILTER_NEAREST
;
726 sampler
->min_mip_filter
= PIPE_TEX_MIPFILTER_NONE
;
727 sampler
->mag_img_filter
= PIPE_TEX_FILTER_NEAREST
;
728 sampler
->normalized_coords
= 1;
730 /* init baseline rasterizer state once */
731 memset(&st
->bitmap
.rasterizer
, 0, sizeof(st
->bitmap
.rasterizer
));
732 st
->bitmap
.rasterizer
.gl_rasterization_rules
= 1;
733 st
->bitmap
.rasterizer
.bypass_vs
= 1;
735 /* find a usable texture format */
736 if (screen
->is_format_supported(screen
, PIPE_FORMAT_I8_UNORM
, PIPE_TEXTURE
)) {
737 st
->bitmap
.tex_format
= PIPE_FORMAT_I8_UNORM
;
740 /* XXX support more formats */
744 /* alloc bitmap cache object */
745 st
->bitmap
.cache
= CALLOC_STRUCT(bitmap_cache
);
751 /** Per-context tear-down */
753 st_destroy_bitmap(struct st_context
*st
)
755 struct pipe_context
*pipe
= st
->pipe
;
756 struct pipe_screen
*screen
= pipe
->screen
;
757 struct bitmap_cache
*cache
= st
->bitmap
.cache
;
759 screen
->surface_unmap(screen
, cache
->surf
);
760 screen
->tex_surface_release(screen
, &cache
->surf
);
763 cso_delete_vertex_shader(st
->cso_context
, st
->bitmap
.vs
);
764 st
->bitmap
.vs
= NULL
;
767 if (st
->bitmap
.vbuf
) {
768 pipe_buffer_destroy(pipe
, st
->bitmap
.vbuf
);
769 st
->bitmap
.vbuf
= NULL
;
772 if (st
->bitmap
.cache
) {
773 pipe_texture_release(&st
->bitmap
.cache
->texture
);
774 FREE(st
->bitmap
.cache
);
775 st
->bitmap
.cache
= NULL
;