1 /**************************************************************************
3 * Copyright 2007 VMware, Inc.
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 VMWARE 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/errors.h"
34 #include "main/imports.h"
35 #include "main/image.h"
36 #include "main/bufferobj.h"
37 #include "main/dlist.h"
38 #include "main/macros.h"
40 #include "program/program.h"
41 #include "program/prog_print.h"
43 #include "st_context.h"
45 #include "st_atom_constbuf.h"
47 #include "st_program.h"
48 #include "st_cb_bitmap.h"
49 #include "st_sampler_view.h"
50 #include "st_texture.h"
52 #include "pipe/p_context.h"
53 #include "pipe/p_defines.h"
54 #include "pipe/p_shader_tokens.h"
55 #include "util/u_inlines.h"
56 #include "util/u_simple_shaders.h"
57 #include "util/u_upload_mgr.h"
58 #include "program/prog_instruction.h"
59 #include "cso_cache/cso_context.h"
63 * glBitmaps are drawn as textured quads. The user's bitmap pattern
64 * is stored in a texture image. An alpha8 texture format is used.
65 * The fragment shader samples a bit (texel) from the texture, then
66 * discards the fragment if the bit is off.
68 * Note that we actually store the inverse image of the bitmap to
69 * simplify the fragment program. An "on" bit gets stored as texel=0x0
70 * and an "off" bit is stored as texel=0xff. Then we kill the
71 * fragment if the negated texel value is less than zero.
76 * The bitmap cache attempts to accumulate multiple glBitmap calls in a
77 * buffer which is then rendered en mass upon a flush, state change, etc.
78 * A wide, short buffer is used to target the common case of a series
79 * of glBitmap calls being used to draw text.
81 static GLboolean UseBitmapCache
= GL_TRUE
;
84 #define BITMAP_CACHE_WIDTH 512
85 #define BITMAP_CACHE_HEIGHT 32
88 /** Epsilon for Z comparisons */
89 #define Z_EPSILON 1e-06
93 * Copy user-provide bitmap bits into texture buffer, expanding
95 * "On" bits will set texels to 0x0.
96 * "Off" bits will not modify texels.
97 * Note that the image is actually going to be upside down in
98 * the texture. We deal with that with texcoords.
101 unpack_bitmap(struct st_context
*st
,
102 GLint px
, GLint py
, GLsizei width
, GLsizei height
,
103 const struct gl_pixelstore_attrib
*unpack
,
104 const GLubyte
*bitmap
,
105 ubyte
*destBuffer
, uint destStride
)
107 destBuffer
+= py
* destStride
+ px
;
109 _mesa_expand_bitmap(width
, height
, unpack
, bitmap
,
110 destBuffer
, destStride
, 0x0);
115 * Create a texture which represents a bitmap image.
117 static struct pipe_resource
*
118 make_bitmap_texture(struct gl_context
*ctx
, GLsizei width
, GLsizei height
,
119 const struct gl_pixelstore_attrib
*unpack
,
120 const GLubyte
*bitmap
)
122 struct st_context
*st
= st_context(ctx
);
123 struct pipe_context
*pipe
= st
->pipe
;
124 struct pipe_transfer
*transfer
;
126 struct pipe_resource
*pt
;
129 bitmap
= _mesa_map_pbo_source(ctx
, unpack
, bitmap
);
135 * Create texture to hold bitmap pattern.
137 pt
= st_texture_create(st
, st
->internal_target
, st
->bitmap
.tex_format
,
138 0, width
, height
, 1, 1, 0,
139 PIPE_BIND_SAMPLER_VIEW
);
141 _mesa_unmap_pbo_source(ctx
, unpack
);
145 dest
= pipe_transfer_map(st
->pipe
, pt
, 0, 0,
147 0, 0, width
, height
, &transfer
);
149 /* Put image into texture transfer */
150 memset(dest
, 0xff, height
* transfer
->stride
);
151 unpack_bitmap(st
, 0, 0, width
, height
, unpack
, bitmap
,
152 dest
, transfer
->stride
);
154 _mesa_unmap_pbo_source(ctx
, unpack
);
156 /* Release transfer */
157 pipe_transfer_unmap(pipe
, transfer
);
163 * Setup pipeline state prior to rendering the bitmap textured quad.
166 setup_render_state(struct gl_context
*ctx
,
167 struct pipe_sampler_view
*sv
,
168 const GLfloat
*color
,
171 struct st_context
*st
= st_context(ctx
);
172 struct cso_context
*cso
= st
->cso_context
;
173 struct st_fp_variant
*fpv
;
174 struct st_fp_variant_key key
;
176 memset(&key
, 0, sizeof(key
));
177 key
.st
= st
->has_shareable_shaders
? NULL
: st
;
178 key
.bitmap
= GL_TRUE
;
179 key
.clamp_color
= st
->clamp_frag_color_in_shader
&&
180 ctx
->Color
._ClampFragmentColor
;
182 fpv
= st_get_fp_variant(st
, st
->fp
, &key
);
184 /* As an optimization, Mesa's fragment programs will sometimes get the
185 * primary color from a statevar/constant rather than a varying variable.
186 * when that's the case, we need to ensure that we use the 'color'
187 * parameter and not the current attribute color (which may have changed
188 * through glRasterPos and state validation.
189 * So, we force the proper color here. Not elegant, but it works.
192 GLfloat colorSave
[4];
193 COPY_4V(colorSave
, ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR0
]);
194 COPY_4V(ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR0
], color
);
195 st_upload_constants(st
, &st
->fp
->Base
);
196 COPY_4V(ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR0
], colorSave
);
199 cso_save_state(cso
, (CSO_BIT_RASTERIZER
|
200 CSO_BIT_FRAGMENT_SAMPLERS
|
201 CSO_BIT_FRAGMENT_SAMPLER_VIEWS
|
203 CSO_BIT_STREAM_OUTPUTS
|
204 CSO_BIT_VERTEX_ELEMENTS
|
205 CSO_BIT_AUX_VERTEX_BUFFER_SLOT
|
206 CSO_BITS_ALL_SHADERS
));
209 /* rasterizer state: just scissor */
210 st
->bitmap
.rasterizer
.scissor
= ctx
->Scissor
.EnableFlags
& 1;
211 cso_set_rasterizer(cso
, &st
->bitmap
.rasterizer
);
213 /* fragment shader state: TEX lookup program */
214 cso_set_fragment_shader_handle(cso
, fpv
->driver_shader
);
216 /* vertex shader state: position + texcoord pass-through */
217 cso_set_vertex_shader_handle(cso
, st
->bitmap
.vs
);
219 /* disable other shaders */
220 cso_set_tessctrl_shader_handle(cso
, NULL
);
221 cso_set_tesseval_shader_handle(cso
, NULL
);
222 cso_set_geometry_shader_handle(cso
, NULL
);
224 /* user samplers, plus our bitmap sampler */
226 struct pipe_sampler_state
*samplers
[PIPE_MAX_SAMPLERS
];
227 uint num
= MAX2(fpv
->bitmap_sampler
+ 1,
228 st
->state
.num_frag_samplers
);
230 for (i
= 0; i
< st
->state
.num_frag_samplers
; i
++) {
231 samplers
[i
] = &st
->state
.frag_samplers
[i
];
234 samplers
[fpv
->bitmap_sampler
] = &st
->bitmap
.atlas_sampler
;
236 samplers
[fpv
->bitmap_sampler
] = &st
->bitmap
.sampler
;
237 cso_set_samplers(cso
, PIPE_SHADER_FRAGMENT
, num
,
238 (const struct pipe_sampler_state
**) samplers
);
241 /* user textures, plus the bitmap texture */
243 struct pipe_sampler_view
*sampler_views
[PIPE_MAX_SAMPLERS
];
244 uint num
= MAX2(fpv
->bitmap_sampler
+ 1,
245 st
->state
.num_sampler_views
[PIPE_SHADER_FRAGMENT
]);
246 memcpy(sampler_views
, st
->state
.frag_sampler_views
,
247 sizeof(sampler_views
));
248 sampler_views
[fpv
->bitmap_sampler
] = sv
;
249 cso_set_sampler_views(cso
, PIPE_SHADER_FRAGMENT
, num
, sampler_views
);
252 /* viewport state: viewport matching window dims */
253 cso_set_viewport_dims(cso
, st
->state
.fb_width
,
255 st
->state
.fb_orientation
== Y_0_TOP
);
257 cso_set_vertex_elements(cso
, 3, st
->util_velems
);
259 cso_set_stream_outputs(st
->cso_context
, 0, NULL
, NULL
);
264 * Restore pipeline state after rendering the bitmap textured quad.
267 restore_render_state(struct gl_context
*ctx
)
269 struct st_context
*st
= st_context(ctx
);
270 struct cso_context
*cso
= st
->cso_context
;
272 cso_restore_state(cso
);
277 * Render a glBitmap by drawing a textured quad
280 draw_bitmap_quad(struct gl_context
*ctx
, GLint x
, GLint y
, GLfloat z
,
281 GLsizei width
, GLsizei height
,
282 struct pipe_sampler_view
*sv
,
283 const GLfloat
*color
)
285 struct st_context
*st
= st_context(ctx
);
286 struct pipe_context
*pipe
= st
->pipe
;
287 const float fb_width
= (float) st
->state
.fb_width
;
288 const float fb_height
= (float) st
->state
.fb_height
;
289 const float x0
= (float) x
;
290 const float x1
= (float) (x
+ width
);
291 const float y0
= (float) y
;
292 const float y1
= (float) (y
+ height
);
293 float sLeft
= 0.0f
, sRight
= 1.0f
;
294 float tTop
= 0.0f
, tBot
= 1.0f
- tTop
;
295 const float clip_x0
= x0
/ fb_width
* 2.0f
- 1.0f
;
296 const float clip_y0
= y0
/ fb_height
* 2.0f
- 1.0f
;
297 const float clip_x1
= x1
/ fb_width
* 2.0f
- 1.0f
;
298 const float clip_y1
= y1
/ fb_height
* 2.0f
- 1.0f
;
302 /* XXX if the bitmap is larger than the max texture size, break
305 GLuint MAYBE_UNUSED maxSize
=
306 1 << (pipe
->screen
->get_param(pipe
->screen
,
307 PIPE_CAP_MAX_TEXTURE_2D_LEVELS
) - 1);
308 assert(width
<= (GLsizei
) maxSize
);
309 assert(height
<= (GLsizei
) maxSize
);
312 setup_render_state(ctx
, sv
, color
, false);
314 /* convert Z from [0,1] to [-1,-1] to match viewport Z scale/bias */
317 if (sv
->texture
->target
== PIPE_TEXTURE_RECT
) {
318 /* use non-normalized texcoords */
319 sRight
= (float) width
;
320 tBot
= (float) height
;
323 if (!st_draw_quad(st
, clip_x0
, clip_y0
, clip_x1
, clip_y1
, z
,
324 sLeft
, tBot
, sRight
, tTop
, color
, 0)) {
325 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glBitmap");
328 restore_render_state(ctx
);
330 /* We uploaded modified constants, need to invalidate them. */
331 st
->dirty
|= ST_NEW_FS_CONSTANTS
;
336 reset_cache(struct st_context
*st
)
338 struct st_bitmap_cache
*cache
= &st
->bitmap
.cache
;
340 /*memset(cache->buffer, 0xff, sizeof(cache->buffer));*/
341 cache
->empty
= GL_TRUE
;
343 cache
->xmin
= 1000000;
344 cache
->xmax
= -1000000;
345 cache
->ymin
= 1000000;
346 cache
->ymax
= -1000000;
348 assert(!cache
->texture
);
350 /* allocate a new texture */
351 cache
->texture
= st_texture_create(st
, st
->internal_target
,
352 st
->bitmap
.tex_format
, 0,
353 BITMAP_CACHE_WIDTH
, BITMAP_CACHE_HEIGHT
,
355 PIPE_BIND_SAMPLER_VIEW
);
359 /** Print bitmap image to stdout (debug) */
361 print_cache(const struct st_bitmap_cache
*cache
)
365 for (i
= 0; i
< BITMAP_CACHE_HEIGHT
; i
++) {
366 k
= BITMAP_CACHE_WIDTH
* (BITMAP_CACHE_HEIGHT
- i
- 1);
367 for (j
= 0; j
< BITMAP_CACHE_WIDTH
; j
++) {
368 if (cache
->buffer
[k
])
380 * Create gallium pipe_transfer object for the bitmap cache.
383 create_cache_trans(struct st_context
*st
)
385 struct pipe_context
*pipe
= st
->pipe
;
386 struct st_bitmap_cache
*cache
= &st
->bitmap
.cache
;
391 /* Map the texture transfer.
392 * Subsequent glBitmap calls will write into the texture image.
394 cache
->buffer
= pipe_transfer_map(pipe
, cache
->texture
, 0, 0,
395 PIPE_TRANSFER_WRITE
, 0, 0,
397 BITMAP_CACHE_HEIGHT
, &cache
->trans
);
399 /* init image to all 0xff */
400 memset(cache
->buffer
, 0xff, cache
->trans
->stride
* BITMAP_CACHE_HEIGHT
);
405 * If there's anything in the bitmap cache, draw/flush it now.
408 st_flush_bitmap_cache(struct st_context
*st
)
410 struct st_bitmap_cache
*cache
= &st
->bitmap
.cache
;
413 struct pipe_context
*pipe
= st
->pipe
;
414 struct pipe_sampler_view
*sv
;
416 assert(cache
->xmin
<= cache
->xmax
);
419 printf("flush bitmap, size %d x %d at %d, %d\n",
420 cache
->xmax
- cache
->xmin
,
421 cache
->ymax
- cache
->ymin
,
422 cache
->xpos
, cache
->ypos
);
424 /* The texture transfer has been mapped until now.
425 * So unmap and release the texture transfer before drawing.
427 if (cache
->trans
&& cache
->buffer
) {
430 pipe_transfer_unmap(pipe
, cache
->trans
);
431 cache
->buffer
= NULL
;
435 sv
= st_create_texture_sampler_view(st
->pipe
, cache
->texture
);
437 draw_bitmap_quad(st
->ctx
,
441 BITMAP_CACHE_WIDTH
, BITMAP_CACHE_HEIGHT
,
445 pipe_sampler_view_reference(&sv
, NULL
);
448 /* release/free the texture */
449 pipe_resource_reference(&cache
->texture
, NULL
);
457 * Try to accumulate this glBitmap call in the bitmap cache.
458 * \return GL_TRUE for success, GL_FALSE if bitmap is too large, etc.
461 accum_bitmap(struct gl_context
*ctx
,
462 GLint x
, GLint y
, GLsizei width
, GLsizei height
,
463 const struct gl_pixelstore_attrib
*unpack
,
464 const GLubyte
*bitmap
)
466 struct st_context
*st
= ctx
->st
;
467 struct st_bitmap_cache
*cache
= &st
->bitmap
.cache
;
468 int px
= -999, py
= -999;
469 const GLfloat z
= ctx
->Current
.RasterPos
[2];
471 if (width
> BITMAP_CACHE_WIDTH
||
472 height
> BITMAP_CACHE_HEIGHT
)
473 return GL_FALSE
; /* too big to cache */
476 px
= x
- cache
->xpos
; /* pos in buffer */
477 py
= y
- cache
->ypos
;
478 if (px
< 0 || px
+ width
> BITMAP_CACHE_WIDTH
||
479 py
< 0 || py
+ height
> BITMAP_CACHE_HEIGHT
||
480 !TEST_EQ_4V(ctx
->Current
.RasterColor
, cache
->color
) ||
481 ((fabs(z
- cache
->zpos
) > Z_EPSILON
))) {
482 /* This bitmap would extend beyond cache bounds, or the bitmap
484 * so flush and continue.
486 st_flush_bitmap_cache(st
);
491 /* Initialize. Center bitmap vertically in the buffer. */
493 py
= (BITMAP_CACHE_HEIGHT
- height
) / 2;
495 cache
->ypos
= y
- py
;
497 cache
->empty
= GL_FALSE
;
498 COPY_4FV(cache
->color
, ctx
->Current
.RasterColor
);
508 if (x
+ width
> cache
->xmax
)
509 cache
->xmax
= x
+ width
;
510 if (y
+ height
> cache
->ymax
)
511 cache
->ymax
= y
+ height
;
513 /* create the transfer if needed */
514 create_cache_trans(st
);
517 bitmap
= _mesa_map_pbo_source(ctx
, unpack
, bitmap
);
522 unpack_bitmap(st
, px
, py
, width
, height
, unpack
, bitmap
,
523 cache
->buffer
, BITMAP_CACHE_WIDTH
);
525 _mesa_unmap_pbo_source(ctx
, unpack
);
527 return GL_TRUE
; /* accumulated */
532 * One-time init for drawing bitmaps.
535 init_bitmap_state(struct st_context
*st
)
537 struct pipe_context
*pipe
= st
->pipe
;
538 struct pipe_screen
*screen
= pipe
->screen
;
540 /* This function should only be called once */
541 assert(st
->bitmap
.vs
== NULL
);
543 assert(st
->internal_target
== PIPE_TEXTURE_2D
||
544 st
->internal_target
== PIPE_TEXTURE_RECT
);
546 /* init sampler state once */
547 memset(&st
->bitmap
.sampler
, 0, sizeof(st
->bitmap
.sampler
));
548 st
->bitmap
.sampler
.wrap_s
= PIPE_TEX_WRAP_CLAMP
;
549 st
->bitmap
.sampler
.wrap_t
= PIPE_TEX_WRAP_CLAMP
;
550 st
->bitmap
.sampler
.wrap_r
= PIPE_TEX_WRAP_CLAMP
;
551 st
->bitmap
.sampler
.min_img_filter
= PIPE_TEX_FILTER_NEAREST
;
552 st
->bitmap
.sampler
.min_mip_filter
= PIPE_TEX_MIPFILTER_NONE
;
553 st
->bitmap
.sampler
.mag_img_filter
= PIPE_TEX_FILTER_NEAREST
;
554 st
->bitmap
.sampler
.normalized_coords
= st
->internal_target
== PIPE_TEXTURE_2D
;
556 st
->bitmap
.atlas_sampler
= st
->bitmap
.sampler
;
557 st
->bitmap
.atlas_sampler
.normalized_coords
= 0;
559 /* init baseline rasterizer state once */
560 memset(&st
->bitmap
.rasterizer
, 0, sizeof(st
->bitmap
.rasterizer
));
561 st
->bitmap
.rasterizer
.half_pixel_center
= 1;
562 st
->bitmap
.rasterizer
.bottom_edge_rule
= 1;
563 st
->bitmap
.rasterizer
.depth_clip
= 1;
565 /* find a usable texture format */
566 if (screen
->is_format_supported(screen
, PIPE_FORMAT_I8_UNORM
,
567 st
->internal_target
, 0,
568 PIPE_BIND_SAMPLER_VIEW
)) {
569 st
->bitmap
.tex_format
= PIPE_FORMAT_I8_UNORM
;
571 else if (screen
->is_format_supported(screen
, PIPE_FORMAT_A8_UNORM
,
572 st
->internal_target
, 0,
573 PIPE_BIND_SAMPLER_VIEW
)) {
574 st
->bitmap
.tex_format
= PIPE_FORMAT_A8_UNORM
;
576 else if (screen
->is_format_supported(screen
, PIPE_FORMAT_L8_UNORM
,
577 st
->internal_target
, 0,
578 PIPE_BIND_SAMPLER_VIEW
)) {
579 st
->bitmap
.tex_format
= PIPE_FORMAT_L8_UNORM
;
582 /* XXX support more formats */
586 /* Create the vertex shader */
588 const uint semantic_names
[] = { TGSI_SEMANTIC_POSITION
,
590 st
->needs_texcoord_semantic
? TGSI_SEMANTIC_TEXCOORD
:
591 TGSI_SEMANTIC_GENERIC
};
592 const uint semantic_indexes
[] = { 0, 0, 0 };
593 st
->bitmap
.vs
= util_make_vertex_passthrough_shader(st
->pipe
, 3,
604 * Called via ctx->Driver.Bitmap()
607 st_Bitmap(struct gl_context
*ctx
, GLint x
, GLint y
,
608 GLsizei width
, GLsizei height
,
609 const struct gl_pixelstore_attrib
*unpack
, const GLubyte
*bitmap
)
611 struct st_context
*st
= st_context(ctx
);
612 struct pipe_resource
*pt
;
617 st_invalidate_readpix_cache(st
);
619 if (!st
->bitmap
.vs
) {
620 init_bitmap_state(st
);
623 /* We only need to validate any non-ST_NEW_CONSTANTS state. The VS we use
624 * for bitmap drawing uses no constants and the FS constants are
625 * explicitly uploaded in the draw_bitmap_quad() function.
627 if ((st
->dirty
| ctx
->NewDriverState
) & ~ST_NEW_CONSTANTS
&
628 ST_PIPELINE_RENDER_STATE_MASK
||
629 st
->gfx_shaders_may_be_dirty
) {
630 st_validate_state(st
, ST_PIPELINE_META
);
633 if (UseBitmapCache
&& accum_bitmap(ctx
, x
, y
, width
, height
, unpack
, bitmap
))
636 pt
= make_bitmap_texture(ctx
, width
, height
, unpack
, bitmap
);
638 struct pipe_sampler_view
*sv
=
639 st_create_texture_sampler_view(st
->pipe
, pt
);
641 assert(pt
->target
== PIPE_TEXTURE_2D
|| pt
->target
== PIPE_TEXTURE_RECT
);
644 draw_bitmap_quad(ctx
, x
, y
, ctx
->Current
.RasterPos
[2],
645 width
, height
, sv
, ctx
->Current
.RasterColor
);
647 pipe_sampler_view_reference(&sv
, NULL
);
650 /* release/free the texture */
651 pipe_resource_reference(&pt
, NULL
);
657 * Called via ctx->Driver.DrawAtlasBitmap()
660 st_DrawAtlasBitmaps(struct gl_context
*ctx
,
661 const struct gl_bitmap_atlas
*atlas
,
662 GLuint count
, const GLubyte
*ids
)
664 struct st_context
*st
= st_context(ctx
);
665 struct pipe_context
*pipe
= st
->pipe
;
666 struct st_texture_object
*stObj
= st_texture_object(atlas
->texObj
);
667 struct pipe_sampler_view
*sv
;
668 /* convert Z from [0,1] to [-1,-1] to match viewport Z scale/bias */
669 const float z
= ctx
->Current
.RasterPos
[2] * 2.0f
- 1.0f
;
670 const float *color
= ctx
->Current
.RasterColor
;
671 const float clip_x_scale
= 2.0f
/ st
->state
.fb_width
;
672 const float clip_y_scale
= 2.0f
/ st
->state
.fb_height
;
673 const unsigned num_verts
= count
* 4;
674 const unsigned num_vert_bytes
= num_verts
* sizeof(struct st_util_vertex
);
675 struct st_util_vertex
*verts
;
676 struct pipe_vertex_buffer vb
= {0};
679 if (!st
->bitmap
.vs
) {
680 init_bitmap_state(st
);
683 st_flush_bitmap_cache(st
);
685 st_validate_state(st
, ST_PIPELINE_META
);
686 st_invalidate_readpix_cache(st
);
688 sv
= st_create_texture_sampler_view(pipe
, stObj
->pt
);
690 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glCallLists(bitmap text)");
694 setup_render_state(ctx
, sv
, color
, true);
696 vb
.stride
= sizeof(struct st_util_vertex
);
698 u_upload_alloc(pipe
->stream_uploader
, 0, num_vert_bytes
, 4,
699 &vb
.buffer_offset
, &vb
.buffer
.resource
, (void **) &verts
);
701 if (unlikely(!verts
)) {
702 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glCallLists(bitmap text)");
706 /* build quads vertex data */
707 for (i
= 0; i
< count
; i
++) {
708 const GLfloat epsilon
= 0.0001F
;
709 const struct gl_bitmap_glyph
*g
= &atlas
->glyphs
[ids
[i
]];
710 const float xmove
= g
->xmove
, ymove
= g
->ymove
;
711 const float xorig
= g
->xorig
, yorig
= g
->yorig
;
712 const float s0
= g
->x
, t0
= g
->y
;
713 const float s1
= s0
+ g
->w
, t1
= t0
+ g
->h
;
714 const float x0
= IFLOOR(ctx
->Current
.RasterPos
[0] - xorig
+ epsilon
);
715 const float y0
= IFLOOR(ctx
->Current
.RasterPos
[1] - yorig
+ epsilon
);
716 const float x1
= x0
+ g
->w
, y1
= y0
+ g
->h
;
717 const float clip_x0
= x0
* clip_x_scale
- 1.0f
;
718 const float clip_y0
= y0
* clip_y_scale
- 1.0f
;
719 const float clip_x1
= x1
* clip_x_scale
- 1.0f
;
720 const float clip_y1
= y1
* clip_y_scale
- 1.0f
;
722 /* lower-left corner */
734 /* lower-right corner */
746 /* upper-right corner */
758 /* upper-left corner */
770 /* Update the raster position */
771 ctx
->Current
.RasterPos
[0] += xmove
;
772 ctx
->Current
.RasterPos
[1] += ymove
;
775 u_upload_unmap(pipe
->stream_uploader
);
777 cso_set_vertex_buffers(st
->cso_context
, 0, 1, &vb
);
778 cso_draw_arrays(st
->cso_context
, PIPE_PRIM_QUADS
, 0, num_verts
);
781 restore_render_state(ctx
);
783 pipe_resource_reference(&vb
.buffer
.resource
, NULL
);
785 pipe_sampler_view_reference(&sv
, NULL
);
787 /* We uploaded modified constants, need to invalidate them. */
788 st
->dirty
|= ST_NEW_FS_CONSTANTS
;
793 /** Per-context init */
795 st_init_bitmap_functions(struct dd_function_table
*functions
)
797 functions
->Bitmap
= st_Bitmap
;
798 functions
->DrawAtlasBitmaps
= st_DrawAtlasBitmaps
;
802 /** Per-context tear-down */
804 st_destroy_bitmap(struct st_context
*st
)
806 struct pipe_context
*pipe
= st
->pipe
;
807 struct st_bitmap_cache
*cache
= &st
->bitmap
.cache
;
810 cso_delete_vertex_shader(st
->cso_context
, st
->bitmap
.vs
);
811 st
->bitmap
.vs
= NULL
;
814 if (cache
->trans
&& cache
->buffer
) {
815 pipe_transfer_unmap(pipe
, cache
->trans
);
817 pipe_resource_reference(&st
->bitmap
.cache
.texture
, NULL
);