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/u_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 return stfp
->bitmap_program
;
227 * Copy user-provide bitmap bits into texture buffer, expanding
229 * "On" bits will set texels to 0xff.
230 * "Off" bits will not modify texels.
231 * Note that the image is actually going to be upside down in
232 * the texture. We deal with that with texcoords.
235 unpack_bitmap(struct st_context
*st
,
236 GLint px
, GLint py
, GLsizei width
, GLsizei height
,
237 const struct gl_pixelstore_attrib
*unpack
,
238 const GLubyte
*bitmap
,
239 ubyte
*destBuffer
, uint destStride
)
243 #define SET_PIXEL(COL, ROW) \
244 destBuffer[(py + (ROW)) * destStride + px + (COL)] = 0x0;
246 for (row
= 0; row
< height
; row
++) {
247 const GLubyte
*src
= (const GLubyte
*) _mesa_image_address2d(unpack
,
248 bitmap
, width
, height
, GL_COLOR_INDEX
, GL_BITMAP
, row
, 0);
250 if (unpack
->LsbFirst
) {
252 GLubyte mask
= 1U << (unpack
->SkipPixels
& 0x7);
253 for (col
= 0; col
< width
; col
++) {
268 /* get ready for next row */
274 GLubyte mask
= 128U >> (unpack
->SkipPixels
& 0x7);
275 for (col
= 0; col
< width
; col
++) {
290 /* get ready for next row */
302 * Create a texture which represents a bitmap image.
304 static struct pipe_texture
*
305 make_bitmap_texture(GLcontext
*ctx
, GLsizei width
, GLsizei height
,
306 const struct gl_pixelstore_attrib
*unpack
,
307 const GLubyte
*bitmap
)
309 struct pipe_context
*pipe
= ctx
->st
->pipe
;
310 struct pipe_screen
*screen
= pipe
->screen
;
311 struct pipe_surface
*surface
;
313 struct pipe_texture
*pt
;
316 bitmap
= _mesa_map_bitmap_pbo(ctx
, unpack
, bitmap
);
322 * Create texture to hold bitmap pattern.
324 pt
= st_texture_create(ctx
->st
, PIPE_TEXTURE_2D
, ctx
->st
->bitmap
.tex_format
,
325 0, width
, height
, 1, 0,
326 PIPE_TEXTURE_USAGE_SAMPLER
);
328 _mesa_unmap_bitmap_pbo(ctx
, unpack
);
332 surface
= screen
->get_tex_surface(screen
, pt
, 0, 0, 0,
333 PIPE_BUFFER_USAGE_CPU_WRITE
);
335 /* map texture surface */
336 dest
= screen
->surface_map(screen
, surface
, PIPE_BUFFER_USAGE_CPU_WRITE
);
338 /* Put image into texture surface */
339 memset(dest
, 0xff, height
* surface
->stride
);
340 unpack_bitmap(ctx
->st
, 0, 0, width
, height
, unpack
, bitmap
,
341 dest
, surface
->stride
);
343 _mesa_unmap_bitmap_pbo(ctx
, unpack
);
345 /* Release surface */
346 screen
->surface_unmap(screen
, surface
);
347 pipe_surface_reference(&surface
, NULL
);
353 setup_bitmap_vertex_data(struct st_context
*st
,
354 int x
, int y
, int width
, int height
,
355 float z
, const float color
[4])
357 struct pipe_context
*pipe
= st
->pipe
;
358 const struct gl_framebuffer
*fb
= st
->ctx
->DrawBuffer
;
359 const GLfloat fb_width
= (GLfloat
)fb
->Width
;
360 const GLfloat fb_height
= (GLfloat
)fb
->Height
;
361 const GLfloat x0
= (GLfloat
)x
;
362 const GLfloat x1
= (GLfloat
)(x
+ width
);
363 const GLfloat y0
= (GLfloat
)y
;
364 const GLfloat y1
= (GLfloat
)(y
+ height
);
365 const GLfloat sLeft
= (GLfloat
)0.0, sRight
= (GLfloat
)1.0;
366 const GLfloat tTop
= (GLfloat
)0.0, tBot
= (GLfloat
)1.0 - tTop
;
367 const GLfloat clip_x0
= (GLfloat
)(x0
/ fb_width
* 2.0 - 1.0);
368 const GLfloat clip_y0
= (GLfloat
)(y0
/ fb_height
* 2.0 - 1.0);
369 const GLfloat clip_x1
= (GLfloat
)(x1
/ fb_width
* 2.0 - 1.0);
370 const GLfloat clip_y1
= (GLfloat
)(y1
/ fb_height
* 2.0 - 1.0);
371 const GLuint max_slots
= 4096 / sizeof(st
->bitmap
.vertices
);
374 if (st
->bitmap
.vbuf_slot
>= max_slots
) {
375 pipe_buffer_reference(pipe
->screen
, &st
->bitmap
.vbuf
, NULL
);
376 st
->bitmap
.vbuf_slot
= 0;
379 if (!st
->bitmap
.vbuf
) {
380 st
->bitmap
.vbuf
= pipe_buffer_create(pipe
->screen
, 32,
381 PIPE_BUFFER_USAGE_VERTEX
,
382 max_slots
* 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 */
422 char *buf
= pipe_buffer_map(pipe
->screen
,
424 PIPE_BUFFER_USAGE_CPU_WRITE
);
426 memcpy(buf
+ st
->bitmap
.vbuf_slot
* sizeof st
->bitmap
.vertices
,
428 sizeof st
->bitmap
.vertices
);
430 pipe_buffer_unmap(pipe
->screen
, st
->bitmap
.vbuf
);
433 return st
->bitmap
.vbuf_slot
++ * sizeof st
->bitmap
.vertices
;
439 * Render a glBitmap by drawing a textured quad
442 draw_bitmap_quad(GLcontext
*ctx
, GLint x
, GLint y
, GLfloat z
,
443 GLsizei width
, GLsizei height
,
444 struct pipe_texture
*pt
,
445 const GLfloat
*color
)
447 struct st_context
*st
= ctx
->st
;
448 struct pipe_context
*pipe
= ctx
->st
->pipe
;
449 struct cso_context
*cso
= ctx
->st
->cso_context
;
450 struct st_fragment_program
*stfp
;
454 stfp
= combined_bitmap_fragment_program(ctx
);
456 /* As an optimization, Mesa's fragment programs will sometimes get the
457 * primary color from a statevar/constant rather than a varying variable.
458 * when that's the case, we need to ensure that we use the 'color'
459 * parameter and not the current attribute color (which may have changed
460 * through glRasterPos and state validation.
461 * So, we force the proper color here. Not elegant, but it works.
464 GLfloat colorSave
[4];
465 COPY_4V(colorSave
, ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR0
]);
466 COPY_4V(ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR0
], color
);
467 st_upload_constants(st
, stfp
->Base
.Base
.Parameters
, PIPE_SHADER_FRAGMENT
);
468 COPY_4V(ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR0
], colorSave
);
473 /* XXX if the bitmap is larger than the max texture size, break
476 maxSize
= 1 << (pipe
->screen
->get_param(pipe
->screen
, PIPE_CAP_MAX_TEXTURE_2D_LEVELS
) - 1);
477 assert(width
<= (GLsizei
)maxSize
);
478 assert(height
<= (GLsizei
)maxSize
);
480 cso_save_rasterizer(cso
);
481 cso_save_samplers(cso
);
482 cso_save_sampler_textures(cso
);
483 cso_save_viewport(cso
);
484 cso_save_fragment_shader(cso
);
485 cso_save_vertex_shader(cso
);
487 /* rasterizer state: just scissor */
488 st
->bitmap
.rasterizer
.scissor
= ctx
->Scissor
.Enabled
;
489 cso_set_rasterizer(cso
, &st
->bitmap
.rasterizer
);
491 /* fragment shader state: TEX lookup program */
492 cso_set_fragment_shader_handle(cso
, stfp
->driver_shader
);
494 /* vertex shader state: position + texcoord pass-through */
495 cso_set_vertex_shader_handle(cso
, st
->bitmap
.vs
);
497 /* user samplers, plus our bitmap sampler */
499 struct pipe_sampler_state
*samplers
[PIPE_MAX_SAMPLERS
];
500 uint num
= MAX2(stfp
->bitmap_sampler
+ 1, st
->state
.num_samplers
);
502 for (i
= 0; i
< st
->state
.num_samplers
; i
++) {
503 samplers
[i
] = &st
->state
.samplers
[i
];
505 samplers
[stfp
->bitmap_sampler
] = &st
->bitmap
.sampler
;
506 cso_set_samplers(cso
, num
, (const struct pipe_sampler_state
**) samplers
);
509 /* user textures, plus the bitmap texture */
511 struct pipe_texture
*textures
[PIPE_MAX_SAMPLERS
];
512 uint num
= MAX2(stfp
->bitmap_sampler
+ 1, st
->state
.num_textures
);
513 memcpy(textures
, st
->state
.sampler_texture
, sizeof(textures
));
514 textures
[stfp
->bitmap_sampler
] = pt
;
515 cso_set_sampler_textures(cso
, num
, textures
);
518 /* viewport state: viewport matching window dims */
520 const struct gl_framebuffer
*fb
= st
->ctx
->DrawBuffer
;
521 const GLboolean invert
= (st_fb_orientation(fb
) == Y_0_TOP
);
522 const GLfloat width
= (GLfloat
)fb
->Width
;
523 const GLfloat height
= (GLfloat
)fb
->Height
;
524 struct pipe_viewport_state vp
;
525 vp
.scale
[0] = 0.5f
* width
;
526 vp
.scale
[1] = height
* (invert
? -0.5f
: 0.5f
);
529 vp
.translate
[0] = 0.5f
* width
;
530 vp
.translate
[1] = 0.5f
* height
;
531 vp
.translate
[2] = 0.0f
;
532 vp
.translate
[3] = 0.0f
;
533 cso_set_viewport(cso
, &vp
);
536 /* draw textured quad */
537 offset
= setup_bitmap_vertex_data(st
, x
, y
, width
, height
,
538 ctx
->Current
.RasterPos
[2],
541 util_draw_vertex_buffer(pipe
, st
->bitmap
.vbuf
, offset
,
542 PIPE_PRIM_TRIANGLE_FAN
,
544 3); /* attribs/vert */
548 cso_restore_rasterizer(cso
);
549 cso_restore_samplers(cso
);
550 cso_restore_sampler_textures(cso
);
551 cso_restore_viewport(cso
);
552 cso_restore_fragment_shader(cso
);
553 cso_restore_vertex_shader(cso
);
558 reset_cache(struct st_context
*st
)
560 struct pipe_context
*pipe
= st
->pipe
;
561 struct pipe_screen
*screen
= pipe
->screen
;
562 struct bitmap_cache
*cache
= st
->bitmap
.cache
;
564 //memset(cache->buffer, 0xff, sizeof(cache->buffer));
565 cache
->empty
= GL_TRUE
;
567 cache
->xmin
= 1000000;
568 cache
->xmax
= -1000000;
569 cache
->ymin
= 1000000;
570 cache
->ymax
= -1000000;
573 screen
->tex_surface_release(screen
, &cache
->surf
);
575 assert(!cache
->texture
);
577 /* allocate a new texture */
578 cache
->texture
= st_texture_create(st
, PIPE_TEXTURE_2D
,
579 st
->bitmap
.tex_format
, 0,
580 BITMAP_CACHE_WIDTH
, BITMAP_CACHE_HEIGHT
,
582 PIPE_TEXTURE_USAGE_SAMPLER
);
584 /* Map the texture surface.
585 * Subsequent glBitmap calls will write into the texture image.
587 cache
->surf
= screen
->get_tex_surface(screen
, cache
->texture
, 0, 0, 0,
588 PIPE_BUFFER_USAGE_CPU_WRITE
);
589 cache
->buffer
= screen
->surface_map(screen
, cache
->surf
,
590 PIPE_BUFFER_USAGE_CPU_WRITE
);
592 /* init image to all 0xff */
593 memset(cache
->buffer
, 0xff, BITMAP_CACHE_WIDTH
* BITMAP_CACHE_HEIGHT
);
598 * If there's anything in the bitmap cache, draw/flush it now.
601 st_flush_bitmap_cache(struct st_context
*st
)
603 if (!st
->bitmap
.cache
->empty
) {
604 struct bitmap_cache
*cache
= st
->bitmap
.cache
;
606 if (st
->ctx
->DrawBuffer
) {
607 struct pipe_context
*pipe
= st
->pipe
;
608 struct pipe_screen
*screen
= pipe
->screen
;
610 assert(cache
->xmin
<= cache
->xmax
);
612 /* printf("flush size %d x %d at %d, %d\n",
613 cache->xmax - cache->xmin,
614 cache->ymax - cache->ymin,
615 cache->xpos, cache->ypos);
618 /* The texture surface has been mapped until now.
619 * So unmap and release the texture surface before drawing.
621 screen
->surface_unmap(screen
, cache
->surf
);
622 cache
->buffer
= NULL
;
624 screen
->tex_surface_release(screen
, &cache
->surf
);
626 draw_bitmap_quad(st
->ctx
,
629 st
->ctx
->Current
.RasterPos
[2],
630 BITMAP_CACHE_WIDTH
, BITMAP_CACHE_HEIGHT
,
635 /* release/free the texture */
636 pipe_texture_reference(&cache
->texture
, NULL
);
642 /* Flush bitmap cache and release vertex buffer.
645 st_flush_bitmap( struct st_context
*st
)
647 st_flush_bitmap_cache(st
);
649 /* Release vertex buffer to avoid synchronous rendering if we were
650 * to map it in the next frame.
652 pipe_buffer_reference(st
->pipe
->screen
, &st
->bitmap
.vbuf
, NULL
);
653 st
->bitmap
.vbuf_slot
= 0;
658 * Try to accumulate this glBitmap call in the bitmap cache.
659 * \return GL_TRUE for success, GL_FALSE if bitmap is too large, etc.
662 accum_bitmap(struct st_context
*st
,
663 GLint x
, GLint y
, GLsizei width
, GLsizei height
,
664 const struct gl_pixelstore_attrib
*unpack
,
665 const GLubyte
*bitmap
)
667 struct bitmap_cache
*cache
= st
->bitmap
.cache
;
670 if (width
> BITMAP_CACHE_WIDTH
||
671 height
> BITMAP_CACHE_HEIGHT
)
672 return GL_FALSE
; /* too big to cache */
675 px
= x
- cache
->xpos
; /* pos in buffer */
676 py
= y
- cache
->ypos
;
677 if (px
< 0 || px
+ width
> BITMAP_CACHE_WIDTH
||
678 py
< 0 || py
+ height
> BITMAP_CACHE_HEIGHT
||
679 !TEST_EQ_4V(st
->ctx
->Current
.RasterColor
, cache
->color
)) {
680 /* This bitmap would extend beyond cache bounds, or the bitmap
682 * so flush and continue.
684 st_flush_bitmap_cache(st
);
689 /* Initialize. Center bitmap vertically in the buffer. */
691 py
= (BITMAP_CACHE_HEIGHT
- height
) / 2;
693 cache
->ypos
= y
- py
;
694 cache
->empty
= GL_FALSE
;
695 COPY_4FV(cache
->color
, st
->ctx
->Current
.RasterColor
);
704 if (x
+ width
> cache
->xmax
)
705 cache
->xmax
= x
+ width
;
706 if (y
+ height
> cache
->ymax
)
707 cache
->ymax
= y
+ height
;
709 unpack_bitmap(st
, px
, py
, width
, height
, unpack
, bitmap
,
710 cache
->buffer
, BITMAP_CACHE_WIDTH
);
712 return GL_TRUE
; /* accumulated */
718 * Called via ctx->Driver.Bitmap()
721 st_Bitmap(GLcontext
*ctx
, GLint x
, GLint y
, GLsizei width
, GLsizei height
,
722 const struct gl_pixelstore_attrib
*unpack
, const GLubyte
*bitmap
)
724 struct st_context
*st
= ctx
->st
;
725 struct pipe_texture
*pt
;
727 if (width
== 0 || height
== 0)
730 st_validate_state(st
);
732 if (!st
->bitmap
.vs
) {
733 /* create pass-through vertex shader now */
734 const uint semantic_names
[] = { TGSI_SEMANTIC_POSITION
,
736 TGSI_SEMANTIC_GENERIC
};
737 const uint semantic_indexes
[] = { 0, 0, 0 };
738 st
->bitmap
.vs
= util_make_vertex_passthrough_shader(st
->pipe
, 3,
741 &st
->bitmap
.vert_shader
);
744 if (UseBitmapCache
&& accum_bitmap(st
, x
, y
, width
, height
, unpack
, bitmap
))
747 pt
= make_bitmap_texture(ctx
, width
, height
, unpack
, bitmap
);
749 assert(pt
->target
== PIPE_TEXTURE_2D
);
750 draw_bitmap_quad(ctx
, x
, y
, ctx
->Current
.RasterPos
[2],
752 st
->ctx
->Current
.RasterColor
);
753 /* release/free the texture */
754 pipe_texture_reference(&pt
, NULL
);
759 /** Per-context init */
761 st_init_bitmap_functions(struct dd_function_table
*functions
)
763 functions
->Bitmap
= st_Bitmap
;
767 /** Per-context init */
769 st_init_bitmap(struct st_context
*st
)
771 struct pipe_sampler_state
*sampler
= &st
->bitmap
.sampler
;
772 struct pipe_context
*pipe
= st
->pipe
;
773 struct pipe_screen
*screen
= pipe
->screen
;
775 /* init sampler state once */
776 memset(sampler
, 0, sizeof(*sampler
));
777 sampler
->wrap_s
= PIPE_TEX_WRAP_CLAMP
;
778 sampler
->wrap_t
= PIPE_TEX_WRAP_CLAMP
;
779 sampler
->wrap_r
= PIPE_TEX_WRAP_CLAMP
;
780 sampler
->min_img_filter
= PIPE_TEX_FILTER_NEAREST
;
781 sampler
->min_mip_filter
= PIPE_TEX_MIPFILTER_NONE
;
782 sampler
->mag_img_filter
= PIPE_TEX_FILTER_NEAREST
;
783 sampler
->normalized_coords
= 1;
785 /* init baseline rasterizer state once */
786 memset(&st
->bitmap
.rasterizer
, 0, sizeof(st
->bitmap
.rasterizer
));
787 st
->bitmap
.rasterizer
.gl_rasterization_rules
= 1;
788 st
->bitmap
.rasterizer
.bypass_vs
= 1;
790 /* find a usable texture format */
791 if (screen
->is_format_supported(screen
, PIPE_FORMAT_I8_UNORM
, PIPE_TEXTURE_2D
,
792 PIPE_TEXTURE_USAGE_SAMPLER
, 0)) {
793 st
->bitmap
.tex_format
= PIPE_FORMAT_I8_UNORM
;
796 /* XXX support more formats */
800 /* alloc bitmap cache object */
801 st
->bitmap
.cache
= CALLOC_STRUCT(bitmap_cache
);
807 /** Per-context tear-down */
809 st_destroy_bitmap(struct st_context
*st
)
811 struct pipe_context
*pipe
= st
->pipe
;
812 struct pipe_screen
*screen
= pipe
->screen
;
813 struct bitmap_cache
*cache
= st
->bitmap
.cache
;
815 screen
->surface_unmap(screen
, cache
->surf
);
816 screen
->tex_surface_release(screen
, &cache
->surf
);
819 cso_delete_vertex_shader(st
->cso_context
, st
->bitmap
.vs
);
820 st
->bitmap
.vs
= NULL
;
823 if (st
->bitmap
.vbuf
) {
824 pipe_buffer_reference(pipe
->screen
, &st
->bitmap
.vbuf
, NULL
);
825 st
->bitmap
.vbuf
= NULL
;
828 if (st
->bitmap
.cache
) {
829 pipe_texture_release(&st
->bitmap
.cache
->texture
);
830 FREE(st
->bitmap
.cache
);
831 st
->bitmap
.cache
= NULL
;