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
;
177 find_free_bit(uint bitfield
)
180 for (i
= 0; i
< 32; i
++) {
181 if ((bitfield
& (1 << i
)) == 0) {
190 * Combine basic bitmap fragment program with the user-defined program.
192 static struct st_fragment_program
*
193 combined_bitmap_fragment_program(GLcontext
*ctx
)
195 struct st_context
*st
= ctx
->st
;
196 struct st_fragment_program
*stfp
= st
->fp
;
198 if (!stfp
->bitmap_program
) {
200 * Generate new program which is the user-defined program prefixed
201 * with the bitmap sampler/kill instructions.
203 struct st_fragment_program
*bitmap_prog
;
206 sampler
= find_free_bit(st
->fp
->Base
.Base
.SamplersUsed
);
207 bitmap_prog
= make_bitmap_fragment_program(ctx
, sampler
);
209 stfp
->bitmap_program
= (struct st_fragment_program
*)
210 _mesa_combine_programs(ctx
,
211 &bitmap_prog
->Base
.Base
, &stfp
->Base
.Base
);
212 stfp
->bitmap_program
->bitmap_sampler
= sampler
;
214 /* done with this after combining */
215 st_reference_fragprog(st
, &bitmap_prog
, NULL
);
219 struct gl_program
*p
= &stfp
->bitmap_program
->Base
.Base
;
220 printf("Combined bitmap program:\n");
221 _mesa_print_program(p
);
222 printf("InputsRead: 0x%x\n", p
->InputsRead
);
223 printf("OutputsWritten: 0x%x\n", p
->OutputsWritten
);
224 _mesa_print_parameter_list(p
->Parameters
);
228 /* translate to TGSI tokens */
229 st_translate_fragment_program(st
, stfp
->bitmap_program
, NULL
);
232 return stfp
->bitmap_program
;
237 * Copy user-provide bitmap bits into texture buffer, expanding
239 * "On" bits will set texels to 0x0.
240 * "Off" bits will not modify texels.
241 * Note that the image is actually going to be upside down in
242 * the texture. We deal with that with texcoords.
245 unpack_bitmap(struct st_context
*st
,
246 GLint px
, GLint py
, GLsizei width
, GLsizei height
,
247 const struct gl_pixelstore_attrib
*unpack
,
248 const GLubyte
*bitmap
,
249 ubyte
*destBuffer
, uint destStride
)
251 destBuffer
+= py
* destStride
+ px
;
253 _mesa_expand_bitmap(width
, height
, unpack
, bitmap
,
254 destBuffer
, destStride
, 0x0);
259 * Create a texture which represents a bitmap image.
261 static struct pipe_texture
*
262 make_bitmap_texture(GLcontext
*ctx
, GLsizei width
, GLsizei height
,
263 const struct gl_pixelstore_attrib
*unpack
,
264 const GLubyte
*bitmap
)
266 struct pipe_context
*pipe
= ctx
->st
->pipe
;
267 struct pipe_screen
*screen
= pipe
->screen
;
268 struct pipe_transfer
*transfer
;
270 struct pipe_texture
*pt
;
273 bitmap
= _mesa_map_pbo_source(ctx
, unpack
, bitmap
);
279 * Create texture to hold bitmap pattern.
281 pt
= st_texture_create(ctx
->st
, PIPE_TEXTURE_2D
, ctx
->st
->bitmap
.tex_format
,
283 PIPE_TEXTURE_USAGE_SAMPLER
);
285 _mesa_unmap_pbo_source(ctx
, unpack
);
289 transfer
= st_no_flush_get_tex_transfer(st_context(ctx
), pt
, 0, 0, 0,
291 0, 0, width
, height
);
293 dest
= screen
->transfer_map(screen
, transfer
);
295 /* Put image into texture transfer */
296 memset(dest
, 0xff, height
* transfer
->stride
);
297 unpack_bitmap(ctx
->st
, 0, 0, width
, height
, unpack
, bitmap
,
298 dest
, transfer
->stride
);
300 _mesa_unmap_pbo_source(ctx
, unpack
);
302 /* Release transfer */
303 screen
->transfer_unmap(screen
, transfer
);
304 screen
->tex_transfer_destroy(transfer
);
310 setup_bitmap_vertex_data(struct st_context
*st
,
311 int x
, int y
, int width
, int height
,
312 float z
, const float color
[4])
314 struct pipe_context
*pipe
= st
->pipe
;
315 const struct gl_framebuffer
*fb
= st
->ctx
->DrawBuffer
;
316 const GLfloat fb_width
= (GLfloat
)fb
->Width
;
317 const GLfloat fb_height
= (GLfloat
)fb
->Height
;
318 const GLfloat x0
= (GLfloat
)x
;
319 const GLfloat x1
= (GLfloat
)(x
+ width
);
320 const GLfloat y0
= (GLfloat
)y
;
321 const GLfloat y1
= (GLfloat
)(y
+ height
);
322 const GLfloat sLeft
= (GLfloat
)0.0, sRight
= (GLfloat
)1.0;
323 const GLfloat tTop
= (GLfloat
)0.0, tBot
= (GLfloat
)1.0 - tTop
;
324 const GLfloat clip_x0
= (GLfloat
)(x0
/ fb_width
* 2.0 - 1.0);
325 const GLfloat clip_y0
= (GLfloat
)(y0
/ fb_height
* 2.0 - 1.0);
326 const GLfloat clip_x1
= (GLfloat
)(x1
/ fb_width
* 2.0 - 1.0);
327 const GLfloat clip_y1
= (GLfloat
)(y1
/ fb_height
* 2.0 - 1.0);
329 /* XXX: Need to improve buffer_write to allow NO_WAIT (as well as
330 * no_flush) updates to buffers where we know there is no conflict
331 * with previous data. Currently using max_slots > 1 will cause
332 * synchronous rendering if the driver flushes its command buffers
333 * between one bitmap and the next. Our flush hook below isn't
334 * sufficient to catch this as the driver doesn't tell us when it
335 * flushes its own command buffers. Until this gets fixed, pay the
336 * price of allocating a new buffer for each bitmap cache-flush to
337 * avoid synchronous rendering.
339 const GLuint max_slots
= 1; /* 4096 / sizeof(st->bitmap.vertices); */
342 if (st
->bitmap
.vbuf_slot
>= max_slots
) {
343 pipe_buffer_reference(&st
->bitmap
.vbuf
, NULL
);
344 st
->bitmap
.vbuf_slot
= 0;
347 if (!st
->bitmap
.vbuf
) {
348 st
->bitmap
.vbuf
= pipe_buffer_create(pipe
->screen
, 32,
349 PIPE_BUFFER_USAGE_VERTEX
,
350 max_slots
* sizeof(st
->bitmap
.vertices
));
353 /* Positions are in clip coords since we need to do clipping in case
354 * the bitmap quad goes beyond the window bounds.
356 st
->bitmap
.vertices
[0][0][0] = clip_x0
;
357 st
->bitmap
.vertices
[0][0][1] = clip_y0
;
358 st
->bitmap
.vertices
[0][2][0] = sLeft
;
359 st
->bitmap
.vertices
[0][2][1] = tTop
;
361 st
->bitmap
.vertices
[1][0][0] = clip_x1
;
362 st
->bitmap
.vertices
[1][0][1] = clip_y0
;
363 st
->bitmap
.vertices
[1][2][0] = sRight
;
364 st
->bitmap
.vertices
[1][2][1] = tTop
;
366 st
->bitmap
.vertices
[2][0][0] = clip_x1
;
367 st
->bitmap
.vertices
[2][0][1] = clip_y1
;
368 st
->bitmap
.vertices
[2][2][0] = sRight
;
369 st
->bitmap
.vertices
[2][2][1] = tBot
;
371 st
->bitmap
.vertices
[3][0][0] = clip_x0
;
372 st
->bitmap
.vertices
[3][0][1] = clip_y1
;
373 st
->bitmap
.vertices
[3][2][0] = sLeft
;
374 st
->bitmap
.vertices
[3][2][1] = tBot
;
376 /* same for all verts: */
377 for (i
= 0; i
< 4; i
++) {
378 st
->bitmap
.vertices
[i
][0][2] = z
;
379 st
->bitmap
.vertices
[i
][0][3] = 1.0;
380 st
->bitmap
.vertices
[i
][1][0] = color
[0];
381 st
->bitmap
.vertices
[i
][1][1] = color
[1];
382 st
->bitmap
.vertices
[i
][1][2] = color
[2];
383 st
->bitmap
.vertices
[i
][1][3] = color
[3];
384 st
->bitmap
.vertices
[i
][2][2] = 0.0; /*R*/
385 st
->bitmap
.vertices
[i
][2][3] = 1.0; /*Q*/
388 /* put vertex data into vbuf */
389 st_no_flush_pipe_buffer_write(st
,
391 st
->bitmap
.vbuf_slot
* sizeof st
->bitmap
.vertices
,
392 sizeof st
->bitmap
.vertices
,
393 st
->bitmap
.vertices
);
395 return st
->bitmap
.vbuf_slot
++ * sizeof st
->bitmap
.vertices
;
401 * Render a glBitmap by drawing a textured quad
404 draw_bitmap_quad(GLcontext
*ctx
, GLint x
, GLint y
, GLfloat z
,
405 GLsizei width
, GLsizei height
,
406 struct pipe_texture
*pt
,
407 const GLfloat
*color
)
409 struct st_context
*st
= ctx
->st
;
410 struct pipe_context
*pipe
= ctx
->st
->pipe
;
411 struct cso_context
*cso
= ctx
->st
->cso_context
;
412 struct st_fragment_program
*stfp
;
416 stfp
= combined_bitmap_fragment_program(ctx
);
418 /* As an optimization, Mesa's fragment programs will sometimes get the
419 * primary color from a statevar/constant rather than a varying variable.
420 * when that's the case, we need to ensure that we use the 'color'
421 * parameter and not the current attribute color (which may have changed
422 * through glRasterPos and state validation.
423 * So, we force the proper color here. Not elegant, but it works.
426 GLfloat colorSave
[4];
427 COPY_4V(colorSave
, ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR0
]);
428 COPY_4V(ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR0
], color
);
429 st_upload_constants(st
, stfp
->Base
.Base
.Parameters
, PIPE_SHADER_FRAGMENT
);
430 COPY_4V(ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR0
], colorSave
);
435 /* XXX if the bitmap is larger than the max texture size, break
438 maxSize
= 1 << (pipe
->screen
->get_param(pipe
->screen
, PIPE_CAP_MAX_TEXTURE_2D_LEVELS
) - 1);
439 assert(width
<= (GLsizei
)maxSize
);
440 assert(height
<= (GLsizei
)maxSize
);
442 cso_save_rasterizer(cso
);
443 cso_save_samplers(cso
);
444 cso_save_sampler_textures(cso
);
445 cso_save_viewport(cso
);
446 cso_save_fragment_shader(cso
);
447 cso_save_vertex_shader(cso
);
449 /* rasterizer state: just scissor */
450 st
->bitmap
.rasterizer
.scissor
= ctx
->Scissor
.Enabled
;
451 cso_set_rasterizer(cso
, &st
->bitmap
.rasterizer
);
453 /* fragment shader state: TEX lookup program */
454 cso_set_fragment_shader_handle(cso
, stfp
->driver_shader
);
456 /* vertex shader state: position + texcoord pass-through */
457 cso_set_vertex_shader_handle(cso
, st
->bitmap
.vs
);
459 /* user samplers, plus our bitmap sampler */
461 struct pipe_sampler_state
*samplers
[PIPE_MAX_SAMPLERS
];
462 uint num
= MAX2(stfp
->bitmap_sampler
+ 1, st
->state
.num_samplers
);
464 for (i
= 0; i
< st
->state
.num_samplers
; i
++) {
465 samplers
[i
] = &st
->state
.samplers
[i
];
467 samplers
[stfp
->bitmap_sampler
] = &st
->bitmap
.sampler
;
468 cso_set_samplers(cso
, num
, (const struct pipe_sampler_state
**) samplers
);
471 /* user textures, plus the bitmap texture */
473 struct pipe_texture
*textures
[PIPE_MAX_SAMPLERS
];
474 uint num
= MAX2(stfp
->bitmap_sampler
+ 1, st
->state
.num_textures
);
475 memcpy(textures
, st
->state
.sampler_texture
, sizeof(textures
));
476 textures
[stfp
->bitmap_sampler
] = pt
;
477 cso_set_sampler_textures(cso
, num
, textures
);
480 /* viewport state: viewport matching window dims */
482 const struct gl_framebuffer
*fb
= st
->ctx
->DrawBuffer
;
483 const GLboolean invert
= (st_fb_orientation(fb
) == Y_0_TOP
);
484 const GLfloat width
= (GLfloat
)fb
->Width
;
485 const GLfloat height
= (GLfloat
)fb
->Height
;
486 struct pipe_viewport_state vp
;
487 vp
.scale
[0] = 0.5f
* width
;
488 vp
.scale
[1] = height
* (invert
? -0.5f
: 0.5f
);
491 vp
.translate
[0] = 0.5f
* width
;
492 vp
.translate
[1] = 0.5f
* height
;
493 vp
.translate
[2] = 0.0f
;
494 vp
.translate
[3] = 0.0f
;
495 cso_set_viewport(cso
, &vp
);
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
);
518 reset_cache(struct st_context
*st
)
520 struct pipe_context
*pipe
= st
->pipe
;
521 struct pipe_screen
*screen
= pipe
->screen
;
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 screen
->tex_transfer_destroy(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
);
548 create_cache_trans(struct st_context
*st
)
550 struct pipe_context
*pipe
= st
->pipe
;
551 struct pipe_screen
*screen
= pipe
->screen
;
552 struct bitmap_cache
*cache
= st
->bitmap
.cache
;
557 /* Map the texture transfer.
558 * Subsequent glBitmap calls will write into the texture image.
560 cache
->trans
= st_no_flush_get_tex_transfer(st
, cache
->texture
, 0, 0, 0,
561 PIPE_TRANSFER_WRITE
, 0, 0,
563 BITMAP_CACHE_HEIGHT
);
564 cache
->buffer
= screen
->transfer_map(screen
, cache
->trans
);
566 /* init image to all 0xff */
567 memset(cache
->buffer
, 0xff, cache
->trans
->stride
* BITMAP_CACHE_HEIGHT
);
572 * If there's anything in the bitmap cache, draw/flush it now.
575 st_flush_bitmap_cache(struct st_context
*st
)
577 if (!st
->bitmap
.cache
->empty
) {
578 struct bitmap_cache
*cache
= st
->bitmap
.cache
;
580 if (st
->ctx
->DrawBuffer
) {
581 struct pipe_context
*pipe
= st
->pipe
;
582 struct pipe_screen
*screen
= pipe
->screen
;
584 assert(cache
->xmin
<= cache
->xmax
);
586 /* printf("flush size %d x %d at %d, %d\n",
587 cache->xmax - cache->xmin,
588 cache->ymax - cache->ymin,
589 cache->xpos, cache->ypos);
592 /* The texture transfer has been mapped until now.
593 * So unmap and release the texture transfer before drawing.
596 screen
->transfer_unmap(screen
, cache
->trans
);
597 cache
->buffer
= NULL
;
599 screen
->tex_transfer_destroy(cache
->trans
);
603 draw_bitmap_quad(st
->ctx
,
607 BITMAP_CACHE_WIDTH
, BITMAP_CACHE_HEIGHT
,
612 /* release/free the texture */
613 pipe_texture_reference(&cache
->texture
, NULL
);
619 /* Flush bitmap cache and release vertex buffer.
622 st_flush_bitmap( struct st_context
*st
)
624 st_flush_bitmap_cache(st
);
626 /* Release vertex buffer to avoid synchronous rendering if we were
627 * to map it in the next frame.
629 pipe_buffer_reference(&st
->bitmap
.vbuf
, NULL
);
630 st
->bitmap
.vbuf_slot
= 0;
635 * Try to accumulate this glBitmap call in the bitmap cache.
636 * \return GL_TRUE for success, GL_FALSE if bitmap is too large, etc.
639 accum_bitmap(struct st_context
*st
,
640 GLint x
, GLint y
, GLsizei width
, GLsizei height
,
641 const struct gl_pixelstore_attrib
*unpack
,
642 const GLubyte
*bitmap
)
644 struct bitmap_cache
*cache
= st
->bitmap
.cache
;
646 const GLfloat z
= st
->ctx
->Current
.RasterPos
[2];
648 if (width
> BITMAP_CACHE_WIDTH
||
649 height
> BITMAP_CACHE_HEIGHT
)
650 return GL_FALSE
; /* too big to cache */
653 px
= x
- cache
->xpos
; /* pos in buffer */
654 py
= y
- cache
->ypos
;
655 if (px
< 0 || px
+ width
> BITMAP_CACHE_WIDTH
||
656 py
< 0 || py
+ height
> BITMAP_CACHE_HEIGHT
||
657 !TEST_EQ_4V(st
->ctx
->Current
.RasterColor
, cache
->color
) ||
658 ((fabs(z
- cache
->zpos
) > Z_EPSILON
))) {
659 /* This bitmap would extend beyond cache bounds, or the bitmap
661 * so flush and continue.
663 st_flush_bitmap_cache(st
);
668 /* Initialize. Center bitmap vertically in the buffer. */
670 py
= (BITMAP_CACHE_HEIGHT
- height
) / 2;
672 cache
->ypos
= y
- py
;
674 cache
->empty
= GL_FALSE
;
675 COPY_4FV(cache
->color
, st
->ctx
->Current
.RasterColor
);
684 if (x
+ width
> cache
->xmax
)
685 cache
->xmax
= x
+ width
;
686 if (y
+ height
> cache
->ymax
)
687 cache
->ymax
= y
+ height
;
689 /* create the transfer if needed */
690 create_cache_trans(st
);
692 unpack_bitmap(st
, px
, py
, width
, height
, unpack
, bitmap
,
693 cache
->buffer
, BITMAP_CACHE_WIDTH
);
695 return GL_TRUE
; /* accumulated */
701 * Called via ctx->Driver.Bitmap()
704 st_Bitmap(GLcontext
*ctx
, GLint x
, GLint y
, GLsizei width
, GLsizei height
,
705 const struct gl_pixelstore_attrib
*unpack
, const GLubyte
*bitmap
)
707 struct st_context
*st
= ctx
->st
;
708 struct pipe_texture
*pt
;
710 if (width
== 0 || height
== 0)
713 st_validate_state(st
);
715 if (!st
->bitmap
.vs
) {
716 /* create pass-through vertex shader now */
717 const uint semantic_names
[] = { TGSI_SEMANTIC_POSITION
,
719 TGSI_SEMANTIC_GENERIC
};
720 const uint semantic_indexes
[] = { 0, 0, 0 };
721 st
->bitmap
.vs
= util_make_vertex_passthrough_shader(st
->pipe
, 3,
726 if (UseBitmapCache
&& accum_bitmap(st
, x
, y
, width
, height
, unpack
, bitmap
))
729 pt
= make_bitmap_texture(ctx
, width
, height
, unpack
, bitmap
);
731 assert(pt
->target
== PIPE_TEXTURE_2D
);
732 draw_bitmap_quad(ctx
, x
, y
, ctx
->Current
.RasterPos
[2],
734 st
->ctx
->Current
.RasterColor
);
735 /* release/free the texture */
736 pipe_texture_reference(&pt
, NULL
);
741 /** Per-context init */
743 st_init_bitmap_functions(struct dd_function_table
*functions
)
745 functions
->Bitmap
= st_Bitmap
;
749 /** Per-context init */
751 st_init_bitmap(struct st_context
*st
)
753 struct pipe_sampler_state
*sampler
= &st
->bitmap
.sampler
;
754 struct pipe_context
*pipe
= st
->pipe
;
755 struct pipe_screen
*screen
= pipe
->screen
;
757 /* init sampler state once */
758 memset(sampler
, 0, sizeof(*sampler
));
759 sampler
->wrap_s
= PIPE_TEX_WRAP_CLAMP
;
760 sampler
->wrap_t
= PIPE_TEX_WRAP_CLAMP
;
761 sampler
->wrap_r
= PIPE_TEX_WRAP_CLAMP
;
762 sampler
->min_img_filter
= PIPE_TEX_FILTER_NEAREST
;
763 sampler
->min_mip_filter
= PIPE_TEX_MIPFILTER_NONE
;
764 sampler
->mag_img_filter
= PIPE_TEX_FILTER_NEAREST
;
765 sampler
->normalized_coords
= 1;
767 /* init baseline rasterizer state once */
768 memset(&st
->bitmap
.rasterizer
, 0, sizeof(st
->bitmap
.rasterizer
));
769 st
->bitmap
.rasterizer
.gl_rasterization_rules
= 1;
771 /* find a usable texture format */
772 if (screen
->is_format_supported(screen
, PIPE_FORMAT_I8_UNORM
, PIPE_TEXTURE_2D
,
773 PIPE_TEXTURE_USAGE_SAMPLER
, 0)) {
774 st
->bitmap
.tex_format
= PIPE_FORMAT_I8_UNORM
;
776 else if (screen
->is_format_supported(screen
, PIPE_FORMAT_A8_UNORM
, PIPE_TEXTURE_2D
,
777 PIPE_TEXTURE_USAGE_SAMPLER
, 0)) {
778 st
->bitmap
.tex_format
= PIPE_FORMAT_A8_UNORM
;
780 else if (screen
->is_format_supported(screen
, PIPE_FORMAT_L8_UNORM
, PIPE_TEXTURE_2D
,
781 PIPE_TEXTURE_USAGE_SAMPLER
, 0)) {
782 st
->bitmap
.tex_format
= PIPE_FORMAT_L8_UNORM
;
785 /* XXX support more formats */
789 /* alloc bitmap cache object */
790 st
->bitmap
.cache
= ST_CALLOC_STRUCT(bitmap_cache
);
796 /** Per-context tear-down */
798 st_destroy_bitmap(struct st_context
*st
)
800 struct pipe_context
*pipe
= st
->pipe
;
801 struct pipe_screen
*screen
= pipe
->screen
;
802 struct bitmap_cache
*cache
= st
->bitmap
.cache
;
807 cso_delete_vertex_shader(st
->cso_context
, st
->bitmap
.vs
);
808 st
->bitmap
.vs
= NULL
;
811 if (st
->bitmap
.vbuf
) {
812 pipe_buffer_reference(&st
->bitmap
.vbuf
, NULL
);
813 st
->bitmap
.vbuf
= NULL
;
818 screen
->transfer_unmap(screen
, cache
->trans
);
819 screen
->tex_transfer_destroy(cache
->trans
);
821 pipe_texture_reference(&st
->bitmap
.cache
->texture
, NULL
);
822 _mesa_free(st
->bitmap
.cache
);
823 st
->bitmap
.cache
= NULL
;