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 "shader/program.h"
38 #include "shader/prog_print.h"
40 #include "st_context.h"
42 #include "st_atom_constbuf.h"
43 #include "st_program.h"
44 #include "st_cb_bitmap.h"
45 #include "st_texture.h"
46 #include "st_inlines.h"
48 #include "pipe/p_context.h"
49 #include "pipe/p_defines.h"
50 #include "util/u_inlines.h"
51 #include "util/u_draw_quad.h"
52 #include "util/u_simple_shaders.h"
53 #include "shader/prog_instruction.h"
54 #include "cso_cache/cso_context.h"
59 * glBitmaps are drawn as textured quads. The user's bitmap pattern
60 * is stored in a texture image. An alpha8 texture format is used.
61 * The fragment shader samples a bit (texel) from the texture, then
62 * discards the fragment if the bit is off.
64 * Note that we actually store the inverse image of the bitmap to
65 * simplify the fragment program. An "on" bit gets stored as texel=0x0
66 * and an "off" bit is stored as texel=0xff. Then we kill the
67 * fragment if the negated texel value is less than zero.
72 * The bitmap cache attempts to accumulate multiple glBitmap calls in a
73 * buffer which is then rendered en mass upon a flush, state change, etc.
74 * A wide, short buffer is used to target the common case of a series
75 * of glBitmap calls being used to draw text.
77 static GLboolean UseBitmapCache
= GL_TRUE
;
80 #define BITMAP_CACHE_WIDTH 512
81 #define BITMAP_CACHE_HEIGHT 32
85 /** Window pos to render the cached image */
87 /** Bounds of region used in window coords */
88 GLint xmin
, ymin
, xmax
, ymax
;
92 /** Bitmap's Z position */
95 struct pipe_resource
*texture
;
96 struct pipe_transfer
*trans
;
100 /** An I8 texture image: */
105 /** Epsilon for Z comparisons */
106 #define Z_EPSILON 1e-06
110 * Make fragment program for glBitmap:
111 * Sample the texture and kill the fragment if the bit is 0.
112 * This program will be combined with the user's fragment program.
114 static struct st_fragment_program
*
115 make_bitmap_fragment_program(GLcontext
*ctx
, GLuint samplerIndex
)
117 struct st_fragment_program
*stfp
;
118 struct gl_program
*p
;
121 p
= ctx
->Driver
.NewProgram(ctx
, GL_FRAGMENT_PROGRAM_ARB
, 0);
125 p
->NumInstructions
= 3;
127 p
->Instructions
= _mesa_alloc_instructions(p
->NumInstructions
);
128 if (!p
->Instructions
) {
129 ctx
->Driver
.DeleteProgram(ctx
, p
);
132 _mesa_init_instructions(p
->Instructions
, p
->NumInstructions
);
134 /* TEX tmp0, fragment.texcoord[0], texture[0], 2D; */
135 p
->Instructions
[ic
].Opcode
= OPCODE_TEX
;
136 p
->Instructions
[ic
].DstReg
.File
= PROGRAM_TEMPORARY
;
137 p
->Instructions
[ic
].DstReg
.Index
= 0;
138 p
->Instructions
[ic
].SrcReg
[0].File
= PROGRAM_INPUT
;
139 p
->Instructions
[ic
].SrcReg
[0].Index
= FRAG_ATTRIB_TEX0
;
140 p
->Instructions
[ic
].TexSrcUnit
= samplerIndex
;
141 p
->Instructions
[ic
].TexSrcTarget
= TEXTURE_2D_INDEX
;
144 /* KIL if -tmp0 < 0 # texel=0 -> keep / texel=0 -> discard */
145 p
->Instructions
[ic
].Opcode
= OPCODE_KIL
;
146 p
->Instructions
[ic
].SrcReg
[0].File
= PROGRAM_TEMPORARY
;
148 if (ctx
->st
->bitmap
.tex_format
== PIPE_FORMAT_L8_UNORM
)
149 p
->Instructions
[ic
].SrcReg
[0].Swizzle
= SWIZZLE_XXXX
;
151 p
->Instructions
[ic
].SrcReg
[0].Index
= 0;
152 p
->Instructions
[ic
].SrcReg
[0].Negate
= NEGATE_XYZW
;
156 p
->Instructions
[ic
++].Opcode
= OPCODE_END
;
158 assert(ic
== p
->NumInstructions
);
160 p
->InputsRead
= FRAG_BIT_TEX0
;
161 p
->OutputsWritten
= 0x0;
162 p
->SamplersUsed
= (1 << samplerIndex
);
164 stfp
= (struct st_fragment_program
*) p
;
165 stfp
->Base
.UsesKill
= GL_TRUE
;
172 find_free_bit(uint bitfield
)
175 for (i
= 0; i
< 32; i
++) {
176 if ((bitfield
& (1 << i
)) == 0) {
185 * Combine basic bitmap fragment program with the user-defined program.
187 static struct st_fragment_program
*
188 combined_bitmap_fragment_program(GLcontext
*ctx
)
190 struct st_context
*st
= ctx
->st
;
191 struct st_fragment_program
*stfp
= st
->fp
;
193 if (!stfp
->bitmap_program
) {
195 * Generate new program which is the user-defined program prefixed
196 * with the bitmap sampler/kill instructions.
198 struct st_fragment_program
*bitmap_prog
;
201 sampler
= find_free_bit(st
->fp
->Base
.Base
.SamplersUsed
);
202 bitmap_prog
= make_bitmap_fragment_program(ctx
, sampler
);
204 stfp
->bitmap_program
= (struct st_fragment_program
*)
205 _mesa_combine_programs(ctx
,
206 &bitmap_prog
->Base
.Base
, &stfp
->Base
.Base
);
207 stfp
->bitmap_program
->bitmap_sampler
= sampler
;
209 /* done with this after combining */
210 st_reference_fragprog(st
, &bitmap_prog
, NULL
);
214 struct gl_program
*p
= &stfp
->bitmap_program
->Base
.Base
;
215 printf("Combined bitmap program:\n");
216 _mesa_print_program(p
);
217 printf("InputsRead: 0x%x\n", p
->InputsRead
);
218 printf("OutputsWritten: 0x%x\n", p
->OutputsWritten
);
219 _mesa_print_parameter_list(p
->Parameters
);
223 /* translate to TGSI tokens */
224 st_translate_fragment_program(st
, stfp
->bitmap_program
);
227 return stfp
->bitmap_program
;
232 * Copy user-provide bitmap bits into texture buffer, expanding
234 * "On" bits will set texels to 0x0.
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
)
246 destBuffer
+= py
* destStride
+ px
;
248 _mesa_expand_bitmap(width
, height
, unpack
, bitmap
,
249 destBuffer
, destStride
, 0x0);
254 * Create a texture which represents a bitmap image.
256 static struct pipe_resource
*
257 make_bitmap_texture(GLcontext
*ctx
, GLsizei width
, GLsizei height
,
258 const struct gl_pixelstore_attrib
*unpack
,
259 const GLubyte
*bitmap
)
261 struct pipe_context
*pipe
= ctx
->st
->pipe
;
262 struct pipe_transfer
*transfer
;
264 struct pipe_resource
*pt
;
267 bitmap
= _mesa_map_pbo_source(ctx
, unpack
, bitmap
);
273 * Create texture to hold bitmap pattern.
275 pt
= st_texture_create(ctx
->st
, PIPE_TEXTURE_2D
, ctx
->st
->bitmap
.tex_format
,
277 PIPE_BIND_SAMPLER_VIEW
);
279 _mesa_unmap_pbo_source(ctx
, unpack
);
283 transfer
= st_no_flush_get_tex_transfer(st_context(ctx
), pt
, 0, 0, 0,
285 0, 0, width
, height
);
287 dest
= pipe_transfer_map(pipe
, transfer
);
289 /* Put image into texture transfer */
290 memset(dest
, 0xff, height
* transfer
->stride
);
291 unpack_bitmap(ctx
->st
, 0, 0, width
, height
, unpack
, bitmap
,
292 dest
, transfer
->stride
);
294 _mesa_unmap_pbo_source(ctx
, unpack
);
296 /* Release transfer */
297 pipe_transfer_unmap(pipe
, transfer
);
298 pipe
->transfer_destroy(pipe
, transfer
);
304 setup_bitmap_vertex_data(struct st_context
*st
,
305 int x
, int y
, int width
, int height
,
306 float z
, const float color
[4])
308 struct pipe_context
*pipe
= st
->pipe
;
309 const struct gl_framebuffer
*fb
= st
->ctx
->DrawBuffer
;
310 const GLfloat fb_width
= (GLfloat
)fb
->Width
;
311 const GLfloat fb_height
= (GLfloat
)fb
->Height
;
312 const GLfloat x0
= (GLfloat
)x
;
313 const GLfloat x1
= (GLfloat
)(x
+ width
);
314 const GLfloat y0
= (GLfloat
)y
;
315 const GLfloat y1
= (GLfloat
)(y
+ height
);
316 const GLfloat sLeft
= (GLfloat
)0.0, sRight
= (GLfloat
)1.0;
317 const GLfloat tTop
= (GLfloat
)0.0, tBot
= (GLfloat
)1.0 - tTop
;
318 const GLfloat clip_x0
= (GLfloat
)(x0
/ fb_width
* 2.0 - 1.0);
319 const GLfloat clip_y0
= (GLfloat
)(y0
/ fb_height
* 2.0 - 1.0);
320 const GLfloat clip_x1
= (GLfloat
)(x1
/ fb_width
* 2.0 - 1.0);
321 const GLfloat clip_y1
= (GLfloat
)(y1
/ fb_height
* 2.0 - 1.0);
323 /* XXX: Need to improve buffer_write to allow NO_WAIT (as well as
324 * no_flush) updates to buffers where we know there is no conflict
325 * with previous data. Currently using max_slots > 1 will cause
326 * synchronous rendering if the driver flushes its command buffers
327 * between one bitmap and the next. Our flush hook below isn't
328 * sufficient to catch this as the driver doesn't tell us when it
329 * flushes its own command buffers. Until this gets fixed, pay the
330 * price of allocating a new buffer for each bitmap cache-flush to
331 * avoid synchronous rendering.
333 const GLuint max_slots
= 1; /* 4096 / sizeof(st->bitmap.vertices); */
336 if (st
->bitmap
.vbuf_slot
>= max_slots
) {
337 pipe_resource_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
,
343 PIPE_BIND_VERTEX_BUFFER
,
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_nooverlap(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_sampler_view
*sv
,
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_fragment_sampler_views(cso
);
439 cso_save_viewport(cso
);
440 cso_save_fragment_shader(cso
);
441 cso_save_vertex_shader(cso
);
442 cso_save_vertex_elements(cso
);
444 /* rasterizer state: just scissor */
445 st
->bitmap
.rasterizer
.scissor
= ctx
->Scissor
.Enabled
;
446 cso_set_rasterizer(cso
, &st
->bitmap
.rasterizer
);
448 /* fragment shader state: TEX lookup program */
449 cso_set_fragment_shader_handle(cso
, stfp
->driver_shader
);
451 /* vertex shader state: position + texcoord pass-through */
452 cso_set_vertex_shader_handle(cso
, st
->bitmap
.vs
);
454 /* user samplers, plus our bitmap sampler */
456 struct pipe_sampler_state
*samplers
[PIPE_MAX_SAMPLERS
];
457 uint num
= MAX2(stfp
->bitmap_sampler
+ 1, st
->state
.num_samplers
);
459 for (i
= 0; i
< st
->state
.num_samplers
; i
++) {
460 samplers
[i
] = &st
->state
.samplers
[i
];
462 samplers
[stfp
->bitmap_sampler
] = &st
->bitmap
.sampler
;
463 cso_set_samplers(cso
, num
, (const struct pipe_sampler_state
**) samplers
);
466 /* user textures, plus the bitmap texture */
468 struct pipe_sampler_view
*sampler_views
[PIPE_MAX_SAMPLERS
];
469 uint num
= MAX2(stfp
->bitmap_sampler
+ 1, st
->state
.num_textures
);
470 memcpy(sampler_views
, st
->state
.sampler_views
, sizeof(sampler_views
));
471 sampler_views
[stfp
->bitmap_sampler
] = sv
;
472 cso_set_fragment_sampler_views(cso
, num
, sampler_views
);
475 /* viewport state: viewport matching window dims */
477 const struct gl_framebuffer
*fb
= st
->ctx
->DrawBuffer
;
478 const GLboolean invert
= (st_fb_orientation(fb
) == Y_0_TOP
);
479 const GLfloat width
= (GLfloat
)fb
->Width
;
480 const GLfloat height
= (GLfloat
)fb
->Height
;
481 struct pipe_viewport_state vp
;
482 vp
.scale
[0] = 0.5f
* width
;
483 vp
.scale
[1] = height
* (invert
? -0.5f
: 0.5f
);
486 vp
.translate
[0] = 0.5f
* width
;
487 vp
.translate
[1] = 0.5f
* height
;
488 vp
.translate
[2] = 0.5f
;
489 vp
.translate
[3] = 0.0f
;
490 cso_set_viewport(cso
, &vp
);
493 cso_set_vertex_elements(cso
, 3, st
->velems_util_draw
);
495 /* convert Z from [0,1] to [-1,-1] to match viewport Z scale/bias */
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_fragment_sampler_views(cso
);
511 cso_restore_viewport(cso
);
512 cso_restore_fragment_shader(cso
);
513 cso_restore_vertex_shader(cso
);
514 cso_restore_vertex_elements(cso
);
519 reset_cache(struct st_context
*st
)
521 struct pipe_context
*pipe
= st
->pipe
;
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 pipe
->transfer_destroy(pipe
, 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
,
544 PIPE_BIND_SAMPLER_VIEW
);
548 /** Print bitmap image to stdout (debug) */
550 print_cache(const struct bitmap_cache
*cache
)
554 for (i
= 0; i
< BITMAP_CACHE_HEIGHT
; i
++) {
555 k
= BITMAP_CACHE_WIDTH
* (BITMAP_CACHE_HEIGHT
- i
- 1);
556 for (j
= 0; j
< BITMAP_CACHE_WIDTH
; j
++) {
557 if (cache
->buffer
[k
])
569 create_cache_trans(struct st_context
*st
)
571 struct pipe_context
*pipe
= st
->pipe
;
572 struct bitmap_cache
*cache
= st
->bitmap
.cache
;
577 /* Map the texture transfer.
578 * Subsequent glBitmap calls will write into the texture image.
580 cache
->trans
= st_no_flush_get_tex_transfer(st
, cache
->texture
, 0, 0, 0,
581 PIPE_TRANSFER_WRITE
, 0, 0,
583 BITMAP_CACHE_HEIGHT
);
584 cache
->buffer
= pipe_transfer_map(pipe
, cache
->trans
);
586 /* init image to all 0xff */
587 memset(cache
->buffer
, 0xff, cache
->trans
->stride
* BITMAP_CACHE_HEIGHT
);
592 * If there's anything in the bitmap cache, draw/flush it now.
595 st_flush_bitmap_cache(struct st_context
*st
)
597 if (!st
->bitmap
.cache
->empty
) {
598 struct bitmap_cache
*cache
= st
->bitmap
.cache
;
600 if (st
->ctx
->DrawBuffer
) {
601 struct pipe_context
*pipe
= st
->pipe
;
602 struct pipe_sampler_view
*sv
;
604 assert(cache
->xmin
<= cache
->xmax
);
606 /* printf("flush size %d x %d at %d, %d\n",
607 cache->xmax - cache->xmin,
608 cache->ymax - cache->ymin,
609 cache->xpos, cache->ypos);
612 /* The texture transfer has been mapped until now.
613 * So unmap and release the texture transfer before drawing.
618 pipe_transfer_unmap(pipe
, cache
->trans
);
619 cache
->buffer
= NULL
;
621 pipe
->transfer_destroy(pipe
, cache
->trans
);
625 sv
= st_sampler_view_from_texture(st
->pipe
, cache
->texture
);
627 draw_bitmap_quad(st
->ctx
,
631 BITMAP_CACHE_WIDTH
, BITMAP_CACHE_HEIGHT
,
635 pipe_sampler_view_reference(&sv
, NULL
);
639 /* release/free the texture */
640 pipe_resource_reference(&cache
->texture
, NULL
);
646 /* Flush bitmap cache and release vertex buffer.
649 st_flush_bitmap( struct st_context
*st
)
651 st_flush_bitmap_cache(st
);
653 /* Release vertex buffer to avoid synchronous rendering if we were
654 * to map it in the next frame.
656 pipe_resource_reference(&st
->bitmap
.vbuf
, NULL
);
657 st
->bitmap
.vbuf_slot
= 0;
662 * Try to accumulate this glBitmap call in the bitmap cache.
663 * \return GL_TRUE for success, GL_FALSE if bitmap is too large, etc.
666 accum_bitmap(struct st_context
*st
,
667 GLint x
, GLint y
, GLsizei width
, GLsizei height
,
668 const struct gl_pixelstore_attrib
*unpack
,
669 const GLubyte
*bitmap
)
671 struct bitmap_cache
*cache
= st
->bitmap
.cache
;
672 int px
= -999, py
= -999;
673 const GLfloat z
= st
->ctx
->Current
.RasterPos
[2];
675 if (width
> BITMAP_CACHE_WIDTH
||
676 height
> BITMAP_CACHE_HEIGHT
)
677 return GL_FALSE
; /* too big to cache */
680 px
= x
- cache
->xpos
; /* pos in buffer */
681 py
= y
- cache
->ypos
;
682 if (px
< 0 || px
+ width
> BITMAP_CACHE_WIDTH
||
683 py
< 0 || py
+ height
> BITMAP_CACHE_HEIGHT
||
684 !TEST_EQ_4V(st
->ctx
->Current
.RasterColor
, cache
->color
) ||
685 ((fabs(z
- cache
->zpos
) > Z_EPSILON
))) {
686 /* This bitmap would extend beyond cache bounds, or the bitmap
688 * so flush and continue.
690 st_flush_bitmap_cache(st
);
695 /* Initialize. Center bitmap vertically in the buffer. */
697 py
= (BITMAP_CACHE_HEIGHT
- height
) / 2;
699 cache
->ypos
= y
- py
;
701 cache
->empty
= GL_FALSE
;
702 COPY_4FV(cache
->color
, st
->ctx
->Current
.RasterColor
);
712 if (x
+ width
> cache
->xmax
)
713 cache
->xmax
= x
+ width
;
714 if (y
+ height
> cache
->ymax
)
715 cache
->ymax
= y
+ height
;
717 /* create the transfer if needed */
718 create_cache_trans(st
);
720 unpack_bitmap(st
, px
, py
, width
, height
, unpack
, bitmap
,
721 cache
->buffer
, BITMAP_CACHE_WIDTH
);
723 return GL_TRUE
; /* accumulated */
729 * Called via ctx->Driver.Bitmap()
732 st_Bitmap(GLcontext
*ctx
, GLint x
, GLint y
, GLsizei width
, GLsizei height
,
733 const struct gl_pixelstore_attrib
*unpack
, const GLubyte
*bitmap
)
735 struct st_context
*st
= ctx
->st
;
736 struct pipe_resource
*pt
;
738 if (width
== 0 || height
== 0)
741 st_validate_state(st
);
743 if (!st
->bitmap
.vs
) {
744 /* create pass-through vertex shader now */
745 const uint semantic_names
[] = { TGSI_SEMANTIC_POSITION
,
747 TGSI_SEMANTIC_GENERIC
};
748 const uint semantic_indexes
[] = { 0, 0, 0 };
749 st
->bitmap
.vs
= util_make_vertex_passthrough_shader(st
->pipe
, 3,
754 if (UseBitmapCache
&& accum_bitmap(st
, x
, y
, width
, height
, unpack
, bitmap
))
757 pt
= make_bitmap_texture(ctx
, width
, height
, unpack
, bitmap
);
759 struct pipe_sampler_view
*sv
= st_sampler_view_from_texture(st
->pipe
, pt
);
761 assert(pt
->target
== PIPE_TEXTURE_2D
);
764 draw_bitmap_quad(ctx
, x
, y
, ctx
->Current
.RasterPos
[2],
766 st
->ctx
->Current
.RasterColor
);
768 pipe_sampler_view_reference(&sv
, NULL
);
771 /* release/free the texture */
772 pipe_resource_reference(&pt
, NULL
);
777 /** Per-context init */
779 st_init_bitmap_functions(struct dd_function_table
*functions
)
781 functions
->Bitmap
= st_Bitmap
;
785 /** Per-context init */
787 st_init_bitmap(struct st_context
*st
)
789 struct pipe_sampler_state
*sampler
= &st
->bitmap
.sampler
;
790 struct pipe_context
*pipe
= st
->pipe
;
791 struct pipe_screen
*screen
= pipe
->screen
;
793 /* init sampler state once */
794 memset(sampler
, 0, sizeof(*sampler
));
795 sampler
->wrap_s
= PIPE_TEX_WRAP_CLAMP
;
796 sampler
->wrap_t
= PIPE_TEX_WRAP_CLAMP
;
797 sampler
->wrap_r
= PIPE_TEX_WRAP_CLAMP
;
798 sampler
->min_img_filter
= PIPE_TEX_FILTER_NEAREST
;
799 sampler
->min_mip_filter
= PIPE_TEX_MIPFILTER_NONE
;
800 sampler
->mag_img_filter
= PIPE_TEX_FILTER_NEAREST
;
801 sampler
->normalized_coords
= 1;
803 /* init baseline rasterizer state once */
804 memset(&st
->bitmap
.rasterizer
, 0, sizeof(st
->bitmap
.rasterizer
));
805 st
->bitmap
.rasterizer
.gl_rasterization_rules
= 1;
807 /* find a usable texture format */
808 if (screen
->is_format_supported(screen
, PIPE_FORMAT_I8_UNORM
, PIPE_TEXTURE_2D
,
809 PIPE_BIND_SAMPLER_VIEW
, 0)) {
810 st
->bitmap
.tex_format
= PIPE_FORMAT_I8_UNORM
;
812 else if (screen
->is_format_supported(screen
, PIPE_FORMAT_A8_UNORM
, PIPE_TEXTURE_2D
,
813 PIPE_BIND_SAMPLER_VIEW
, 0)) {
814 st
->bitmap
.tex_format
= PIPE_FORMAT_A8_UNORM
;
816 else if (screen
->is_format_supported(screen
, PIPE_FORMAT_L8_UNORM
, PIPE_TEXTURE_2D
,
817 PIPE_BIND_SAMPLER_VIEW
, 0)) {
818 st
->bitmap
.tex_format
= PIPE_FORMAT_L8_UNORM
;
821 /* XXX support more formats */
825 /* alloc bitmap cache object */
826 st
->bitmap
.cache
= ST_CALLOC_STRUCT(bitmap_cache
);
832 /** Per-context tear-down */
834 st_destroy_bitmap(struct st_context
*st
)
836 struct pipe_context
*pipe
= st
->pipe
;
837 struct bitmap_cache
*cache
= st
->bitmap
.cache
;
842 cso_delete_vertex_shader(st
->cso_context
, st
->bitmap
.vs
);
843 st
->bitmap
.vs
= NULL
;
846 if (st
->bitmap
.vbuf
) {
847 pipe_resource_reference(&st
->bitmap
.vbuf
, NULL
);
848 st
->bitmap
.vbuf
= NULL
;
853 pipe_transfer_unmap(pipe
, cache
->trans
);
854 pipe
->transfer_destroy(pipe
, cache
->trans
);
856 pipe_resource_reference(&st
->bitmap
.cache
->texture
, NULL
);
857 free(st
->bitmap
.cache
);
858 st
->bitmap
.cache
= NULL
;