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/blit.h"
38 #include "main/format_pack.h"
39 #include "main/framebuffer.h"
40 #include "main/macros.h"
41 #include "main/mtypes.h"
42 #include "main/pack.h"
44 #include "main/readpix.h"
45 #include "main/state.h"
46 #include "main/texformat.h"
47 #include "main/teximage.h"
48 #include "main/texstore.h"
49 #include "main/glformats.h"
50 #include "program/program.h"
51 #include "program/prog_print.h"
52 #include "program/prog_instruction.h"
55 #include "st_atom_constbuf.h"
56 #include "st_cb_bitmap.h"
57 #include "st_cb_drawpixels.h"
58 #include "st_cb_readpixels.h"
59 #include "st_cb_fbo.h"
60 #include "st_context.h"
63 #include "st_format.h"
64 #include "st_program.h"
65 #include "st_sampler_view.h"
66 #include "st_scissor.h"
67 #include "st_texture.h"
69 #include "pipe/p_context.h"
70 #include "pipe/p_defines.h"
71 #include "tgsi/tgsi_ureg.h"
72 #include "util/u_format.h"
73 #include "util/u_inlines.h"
74 #include "util/u_math.h"
75 #include "util/u_simple_shaders.h"
76 #include "util/u_tile.h"
77 #include "cso_cache/cso_context.h"
81 * We have a simple glDrawPixels cache to try to optimize the case where the
82 * same image is drawn over and over again. It basically works as follows:
84 * 1. After we construct a texture map with the image and draw it, we do
85 * not discard the texture. We keep it around, plus we note the
86 * glDrawPixels width, height, format, etc. parameters and keep a copy
87 * of the image in a malloc'd buffer.
89 * 2. On the next glDrawPixels we check if the parameters match the previous
90 * call. If those match, we check if the image matches the previous image
91 * via a memcmp() call. If everything matches, we re-use the previous
92 * texture, thereby avoiding the cost creating a new texture and copying
95 * The effectiveness of this cache depends upon:
96 * 1. If the memcmp() finds a difference, it happens relatively quickly.
97 Hopefully, not just the last pixels differ!
98 * 2. If the memcmp() finds no difference, doing that check is faster than
99 * creating and loading a texture.
102 * 1. We don't support any pixel unpacking parameters.
103 * 2. We don't try to cache images in Pixel Buffer Objects.
104 * 3. Instead of saving the whole image, perhaps some sort of reliable
105 * checksum function could be used instead.
107 #define USE_DRAWPIXELS_CACHE 1
112 * Create fragment program that does a TEX() instruction to get a Z and/or
113 * stencil value value, then writes to FRAG_RESULT_DEPTH/FRAG_RESULT_STENCIL.
114 * Used for glDrawPixels(GL_DEPTH_COMPONENT / GL_STENCIL_INDEX).
115 * Pass fragment color through as-is.
117 * \return CSO of the fragment shader.
120 get_drawpix_z_stencil_program(struct st_context
*st
,
121 GLboolean write_depth
,
122 GLboolean write_stencil
)
124 struct ureg_program
*ureg
;
125 struct ureg_src depth_sampler
, stencil_sampler
;
126 struct ureg_src texcoord
, color
;
127 struct ureg_dst out_color
, out_depth
, out_stencil
;
128 const GLuint shaderIndex
= write_depth
* 2 + write_stencil
;
131 assert(shaderIndex
< ARRAY_SIZE(st
->drawpix
.zs_shaders
));
133 if (st
->drawpix
.zs_shaders
[shaderIndex
]) {
134 /* already have the proper shader */
135 return st
->drawpix
.zs_shaders
[shaderIndex
];
138 ureg
= ureg_create(PIPE_SHADER_FRAGMENT
);
142 ureg_property(ureg
, TGSI_PROPERTY_FS_COLOR0_WRITES_ALL_CBUFS
, TRUE
);
145 color
= ureg_DECL_fs_input(ureg
, TGSI_SEMANTIC_COLOR
, 0,
146 TGSI_INTERPOLATE_COLOR
);
147 out_color
= ureg_DECL_output(ureg
, TGSI_SEMANTIC_COLOR
, 0);
149 depth_sampler
= ureg_DECL_sampler(ureg
, 0);
150 ureg_DECL_sampler_view(ureg
, 0, TGSI_TEXTURE_2D
,
151 TGSI_RETURN_TYPE_FLOAT
,
152 TGSI_RETURN_TYPE_FLOAT
,
153 TGSI_RETURN_TYPE_FLOAT
,
154 TGSI_RETURN_TYPE_FLOAT
);
155 out_depth
= ureg_DECL_output(ureg
, TGSI_SEMANTIC_POSITION
, 0);
159 stencil_sampler
= ureg_DECL_sampler(ureg
, 1);
160 ureg_DECL_sampler_view(ureg
, 1, TGSI_TEXTURE_2D
,
161 TGSI_RETURN_TYPE_UINT
,
162 TGSI_RETURN_TYPE_UINT
,
163 TGSI_RETURN_TYPE_UINT
,
164 TGSI_RETURN_TYPE_UINT
);
165 out_stencil
= ureg_DECL_output(ureg
, TGSI_SEMANTIC_STENCIL
, 0);
168 texcoord
= ureg_DECL_fs_input(ureg
,
169 st
->needs_texcoord_semantic
?
170 TGSI_SEMANTIC_TEXCOORD
:
171 TGSI_SEMANTIC_GENERIC
,
172 0, TGSI_INTERPOLATE_LINEAR
);
175 ureg_TEX(ureg
, ureg_writemask(out_depth
, TGSI_WRITEMASK_Z
),
176 TGSI_TEXTURE_2D
, texcoord
, depth_sampler
);
177 ureg_MOV(ureg
, out_color
, color
);
181 ureg_TEX(ureg
, ureg_writemask(out_stencil
, TGSI_WRITEMASK_Y
),
182 TGSI_TEXTURE_2D
, texcoord
, stencil_sampler
);
185 cso
= ureg_create_shader_and_destroy(ureg
, st
->pipe
);
187 /* save the new shader */
188 st
->drawpix
.zs_shaders
[shaderIndex
] = cso
;
194 * Create a simple vertex shader that just passes through the
195 * vertex position, texcoord, and color.
198 st_make_passthrough_vertex_shader(struct st_context
*st
)
200 if (st
->passthrough_vs
)
203 const uint semantic_names
[] = { TGSI_SEMANTIC_POSITION
,
205 st
->needs_texcoord_semantic
? TGSI_SEMANTIC_TEXCOORD
:
206 TGSI_SEMANTIC_GENERIC
};
207 const uint semantic_indexes
[] = { 0, 0, 0 };
210 util_make_vertex_passthrough_shader(st
->pipe
, 3, semantic_names
,
211 semantic_indexes
, false);
216 * Return a texture internalFormat for drawing/copying an image
217 * of the given format and type.
220 internal_format(struct gl_context
*ctx
, GLenum format
, GLenum type
)
223 case GL_DEPTH_COMPONENT
:
225 case GL_UNSIGNED_SHORT
:
226 return GL_DEPTH_COMPONENT16
;
228 case GL_UNSIGNED_INT
:
229 return GL_DEPTH_COMPONENT32
;
232 if (ctx
->Extensions
.ARB_depth_buffer_float
)
233 return GL_DEPTH_COMPONENT32F
;
235 return GL_DEPTH_COMPONENT
;
238 return GL_DEPTH_COMPONENT
;
241 case GL_DEPTH_STENCIL
:
243 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV
:
244 return GL_DEPTH32F_STENCIL8
;
246 case GL_UNSIGNED_INT_24_8
:
248 return GL_DEPTH24_STENCIL8
;
251 case GL_STENCIL_INDEX
:
252 return GL_STENCIL_INDEX
;
255 if (_mesa_is_enum_format_integer(format
)) {
259 case GL_UNSIGNED_BYTE
:
263 case GL_UNSIGNED_SHORT
:
267 case GL_UNSIGNED_INT
:
270 assert(0 && "Unexpected type in internal_format()");
271 return GL_RGBA_INTEGER
;
276 case GL_UNSIGNED_BYTE
:
277 case GL_UNSIGNED_INT_8_8_8_8
:
278 case GL_UNSIGNED_INT_8_8_8_8_REV
:
282 case GL_UNSIGNED_BYTE_3_3_2
:
283 case GL_UNSIGNED_BYTE_2_3_3_REV
:
286 case GL_UNSIGNED_SHORT_4_4_4_4
:
287 case GL_UNSIGNED_SHORT_4_4_4_4_REV
:
290 case GL_UNSIGNED_SHORT_5_6_5
:
291 case GL_UNSIGNED_SHORT_5_6_5_REV
:
294 case GL_UNSIGNED_SHORT_5_5_5_1
:
295 case GL_UNSIGNED_SHORT_1_5_5_5_REV
:
298 case GL_UNSIGNED_INT_10_10_10_2
:
299 case GL_UNSIGNED_INT_2_10_10_10_REV
:
302 case GL_UNSIGNED_SHORT
:
303 case GL_UNSIGNED_INT
:
308 ctx
->Extensions
.EXT_texture_snorm
? GL_RGBA8_SNORM
: GL_RGBA8
;
313 ctx
->Extensions
.EXT_texture_snorm
? GL_RGBA16_SNORM
: GL_RGBA16
;
315 case GL_HALF_FLOAT_ARB
:
317 ctx
->Extensions
.ARB_texture_float
? GL_RGBA16F
:
318 ctx
->Extensions
.EXT_texture_snorm
? GL_RGBA16_SNORM
: GL_RGBA16
;
323 ctx
->Extensions
.ARB_texture_float
? GL_RGBA32F
:
324 ctx
->Extensions
.EXT_texture_snorm
? GL_RGBA16_SNORM
: GL_RGBA16
;
326 case GL_UNSIGNED_INT_5_9_9_9_REV
:
327 assert(ctx
->Extensions
.EXT_texture_shared_exponent
);
330 case GL_UNSIGNED_INT_10F_11F_11F_REV
:
331 assert(ctx
->Extensions
.EXT_packed_float
);
332 return GL_R11F_G11F_B10F
;
340 * Create a temporary texture to hold an image of the given size.
341 * If width, height are not POT and the driver only handles POT textures,
342 * allocate the next larger size of texture that is POT.
344 static struct pipe_resource
*
345 alloc_texture(struct st_context
*st
, GLsizei width
, GLsizei height
,
346 enum pipe_format texFormat
, unsigned bind
)
348 struct pipe_resource
*pt
;
350 pt
= st_texture_create(st
, st
->internal_target
, texFormat
, 0,
351 width
, height
, 1, 1, 0, bind
);
358 * Search the cache for an image which matches the given parameters.
359 * \return pipe_resource pointer if found, NULL if not found.
361 static struct pipe_resource
*
362 search_drawpixels_cache(struct st_context
*st
,
363 GLsizei width
, GLsizei height
,
364 GLenum format
, GLenum type
,
365 const struct gl_pixelstore_attrib
*unpack
,
368 struct pipe_resource
*pt
= NULL
;
369 const GLint bpp
= _mesa_bytes_per_pixel(format
, type
);
372 if ((unpack
->RowLength
!= 0 && unpack
->RowLength
!= width
) ||
373 unpack
->SkipPixels
!= 0 ||
374 unpack
->SkipRows
!= 0 ||
376 _mesa_is_bufferobj(unpack
->BufferObj
)) {
377 /* we don't allow non-default pixel unpacking values */
381 /* Search cache entries for a match */
382 for (i
= 0; i
< ARRAY_SIZE(st
->drawpix_cache
.entries
); i
++) {
383 struct drawpix_cache_entry
*entry
= &st
->drawpix_cache
.entries
[i
];
385 if (width
== entry
->width
&&
386 height
== entry
->height
&&
387 format
== entry
->format
&&
388 type
== entry
->type
&&
389 pixels
== entry
->user_pointer
&&
391 assert(entry
->texture
);
393 /* check if the pixel data is the same */
394 if (memcmp(pixels
, entry
->image
, width
* height
* bpp
) == 0) {
395 /* Success - found a cache match */
396 pipe_resource_reference(&pt
, entry
->texture
);
397 /* refcount of returned texture should be at least two here. One
398 * reference for the cache to hold on to, one for the caller (which
399 * it will release), and possibly more held by the driver.
401 assert(pt
->reference
.count
>= 2);
403 /* update the age of this entry */
404 entry
->age
= ++st
->drawpix_cache
.age
;
411 /* no cache match found */
417 * Find the oldest entry in the glDrawPixels cache. We'll replace this
418 * one when we need to store a new image.
420 static struct drawpix_cache_entry
*
421 find_oldest_drawpixels_cache_entry(struct st_context
*st
)
423 unsigned oldest_age
= ~0u, oldest_index
= ~0u;
426 /* Find entry with oldest (lowest) age */
427 for (i
= 0; i
< ARRAY_SIZE(st
->drawpix_cache
.entries
); i
++) {
428 const struct drawpix_cache_entry
*entry
= &st
->drawpix_cache
.entries
[i
];
429 if (entry
->age
< oldest_age
) {
430 oldest_age
= entry
->age
;
435 assert(oldest_index
!= ~0u);
437 return &st
->drawpix_cache
.entries
[oldest_index
];
442 * Try to save the given glDrawPixels image in the cache.
445 cache_drawpixels_image(struct st_context
*st
,
446 GLsizei width
, GLsizei height
,
447 GLenum format
, GLenum type
,
448 const struct gl_pixelstore_attrib
*unpack
,
450 struct pipe_resource
*pt
)
452 if ((unpack
->RowLength
== 0 || unpack
->RowLength
== width
) &&
453 unpack
->SkipPixels
== 0 &&
454 unpack
->SkipRows
== 0) {
455 const GLint bpp
= _mesa_bytes_per_pixel(format
, type
);
456 struct drawpix_cache_entry
*entry
=
457 find_oldest_drawpixels_cache_entry(st
);
459 entry
->width
= width
;
460 entry
->height
= height
;
461 entry
->format
= format
;
463 entry
->user_pointer
= pixels
;
465 entry
->image
= malloc(width
* height
* bpp
);
467 memcpy(entry
->image
, pixels
, width
* height
* bpp
);
468 pipe_resource_reference(&entry
->texture
, pt
);
469 entry
->age
= ++st
->drawpix_cache
.age
;
472 /* out of memory, free/disable cached texture */
475 pipe_resource_reference(&entry
->texture
, NULL
);
482 * Make texture containing an image for glDrawPixels image.
483 * If 'pixels' is NULL, leave the texture image data undefined.
485 static struct pipe_resource
*
486 make_texture(struct st_context
*st
,
487 GLsizei width
, GLsizei height
, GLenum format
, GLenum type
,
488 const struct gl_pixelstore_attrib
*unpack
,
491 struct gl_context
*ctx
= st
->ctx
;
492 struct pipe_context
*pipe
= st
->pipe
;
494 struct pipe_resource
*pt
= NULL
;
495 enum pipe_format pipeFormat
;
496 GLenum baseInternalFormat
;
498 #if USE_DRAWPIXELS_CACHE
499 pt
= search_drawpixels_cache(st
, width
, height
, format
, type
,
506 /* Choose a pixel format for the temp texture which will hold the
509 pipeFormat
= st_choose_matching_format(st
, PIPE_BIND_SAMPLER_VIEW
,
510 format
, type
, unpack
->SwapBytes
);
512 if (pipeFormat
== PIPE_FORMAT_NONE
) {
513 /* Use the generic approach. */
514 GLenum intFormat
= internal_format(ctx
, format
, type
);
516 pipeFormat
= st_choose_format(st
, intFormat
, format
, type
,
517 st
->internal_target
, 0, 0,
518 PIPE_BIND_SAMPLER_VIEW
, FALSE
);
519 assert(pipeFormat
!= PIPE_FORMAT_NONE
);
522 mformat
= st_pipe_format_to_mesa_format(pipeFormat
);
523 baseInternalFormat
= _mesa_get_format_base_format(mformat
);
525 pixels
= _mesa_map_pbo_source(ctx
, unpack
, pixels
);
529 /* alloc temporary texture */
530 pt
= alloc_texture(st
, width
, height
, pipeFormat
, PIPE_BIND_SAMPLER_VIEW
);
532 _mesa_unmap_pbo_source(ctx
, unpack
);
537 struct pipe_transfer
*transfer
;
539 const GLbitfield imageTransferStateSave
= ctx
->_ImageTransferState
;
541 /* we'll do pixel transfer in a fragment shader */
542 ctx
->_ImageTransferState
= 0x0;
544 /* map texture transfer */
545 dest
= pipe_transfer_map(pipe
, pt
, 0, 0,
546 PIPE_TRANSFER_WRITE
, 0, 0,
547 width
, height
, &transfer
);
549 pipe_resource_reference(&pt
, NULL
);
550 _mesa_unmap_pbo_source(ctx
, unpack
);
554 /* Put image into texture transfer.
555 * Note that the image is actually going to be upside down in
556 * the texture. We deal with that with texcoords.
558 if ((format
== GL_RGBA
|| format
== GL_BGRA
)
559 && type
== GL_UNSIGNED_BYTE
) {
560 /* Use a memcpy-based texstore to avoid software pixel swizzling.
561 * We'll do the necessary swizzling with the pipe_sampler_view to
562 * give much better performance.
563 * XXX in the future, expand this to accomodate more format and
566 _mesa_memcpy_texture(ctx
, 2,
567 mformat
, /* mesa_format */
568 transfer
->stride
, /* dstRowStride, bytes */
569 &dest
, /* destSlices */
570 width
, height
, 1, /* size */
571 format
, type
, /* src format/type */
572 pixels
, /* data source */
576 bool MAYBE_UNUSED success
;
577 success
= _mesa_texstore(ctx
, 2, /* dims */
578 baseInternalFormat
, /* baseInternalFormat */
579 mformat
, /* mesa_format */
580 transfer
->stride
, /* dstRowStride, bytes */
581 &dest
, /* destSlices */
582 width
, height
, 1, /* size */
583 format
, type
, /* src format/type */
584 pixels
, /* data source */
591 pipe_transfer_unmap(pipe
, transfer
);
594 ctx
->_ImageTransferState
= imageTransferStateSave
;
597 _mesa_unmap_pbo_source(ctx
, unpack
);
599 #if USE_DRAWPIXELS_CACHE
600 cache_drawpixels_image(st
, width
, height
, format
, type
, unpack
, pixels
, pt
);
608 draw_textured_quad(struct gl_context
*ctx
, GLint x
, GLint y
, GLfloat z
,
609 GLsizei width
, GLsizei height
,
610 GLfloat zoomX
, GLfloat zoomY
,
611 struct pipe_sampler_view
**sv
,
612 int num_sampler_view
,
615 struct st_fp_variant
*fpv
,
616 const GLfloat
*color
,
618 GLboolean write_depth
, GLboolean write_stencil
)
620 struct st_context
*st
= st_context(ctx
);
621 struct pipe_context
*pipe
= st
->pipe
;
622 struct cso_context
*cso
= st
->cso_context
;
623 const unsigned fb_width
= _mesa_geometric_width(ctx
->DrawBuffer
);
624 const unsigned fb_height
= _mesa_geometric_height(ctx
->DrawBuffer
);
625 GLfloat x0
, y0
, x1
, y1
;
626 GLsizei MAYBE_UNUSED maxSize
;
627 boolean normalized
= sv
[0]->texture
->target
== PIPE_TEXTURE_2D
;
628 unsigned cso_state_mask
;
630 assert(sv
[0]->texture
->target
== st
->internal_target
);
633 /* XXX if DrawPixels image is larger than max texture size, break
636 maxSize
= 1 << (pipe
->screen
->get_param(pipe
->screen
,
637 PIPE_CAP_MAX_TEXTURE_2D_LEVELS
) - 1);
638 assert(width
<= maxSize
);
639 assert(height
<= maxSize
);
641 cso_state_mask
= (CSO_BIT_RASTERIZER
|
643 CSO_BIT_FRAGMENT_SAMPLERS
|
644 CSO_BIT_FRAGMENT_SAMPLER_VIEWS
|
645 CSO_BIT_STREAM_OUTPUTS
|
646 CSO_BIT_VERTEX_ELEMENTS
|
647 CSO_BIT_AUX_VERTEX_BUFFER_SLOT
|
648 CSO_BITS_ALL_SHADERS
);
650 cso_state_mask
|= (CSO_BIT_DEPTH_STENCIL_ALPHA
|
653 cso_save_state(cso
, cso_state_mask
);
655 /* rasterizer state: just scissor */
657 struct pipe_rasterizer_state rasterizer
;
658 memset(&rasterizer
, 0, sizeof(rasterizer
));
659 rasterizer
.clamp_fragment_color
= !st
->clamp_frag_color_in_shader
&&
660 ctx
->Color
._ClampFragmentColor
;
661 rasterizer
.half_pixel_center
= 1;
662 rasterizer
.bottom_edge_rule
= 1;
663 rasterizer
.depth_clip_near
= !ctx
->Transform
.DepthClampNear
;
664 rasterizer
.depth_clip_far
= !ctx
->Transform
.DepthClampFar
;
665 rasterizer
.scissor
= ctx
->Scissor
.EnableFlags
;
666 cso_set_rasterizer(cso
, &rasterizer
);
670 /* Stencil writing bypasses the normal fragment pipeline to
671 * disable color writing and set stencil test to always pass.
673 struct pipe_depth_stencil_alpha_state dsa
;
674 struct pipe_blend_state blend
;
677 memset(&dsa
, 0, sizeof(dsa
));
678 dsa
.stencil
[0].enabled
= 1;
679 dsa
.stencil
[0].func
= PIPE_FUNC_ALWAYS
;
680 dsa
.stencil
[0].writemask
= ctx
->Stencil
.WriteMask
[0] & 0xff;
681 dsa
.stencil
[0].zpass_op
= PIPE_STENCIL_OP_REPLACE
;
683 /* writing depth+stencil: depth test always passes */
684 dsa
.depth
.enabled
= 1;
685 dsa
.depth
.writemask
= ctx
->Depth
.Mask
;
686 dsa
.depth
.func
= PIPE_FUNC_ALWAYS
;
688 cso_set_depth_stencil_alpha(cso
, &dsa
);
690 /* blend (colormask) */
691 memset(&blend
, 0, sizeof(blend
));
692 cso_set_blend(cso
, &blend
);
695 /* fragment shader state: TEX lookup program */
696 cso_set_fragment_shader_handle(cso
, driver_fp
);
698 /* vertex shader state: position + texcoord pass-through */
699 cso_set_vertex_shader_handle(cso
, driver_vp
);
701 /* disable other shaders */
702 cso_set_tessctrl_shader_handle(cso
, NULL
);
703 cso_set_tesseval_shader_handle(cso
, NULL
);
704 cso_set_geometry_shader_handle(cso
, NULL
);
706 /* user samplers, plus the drawpix samplers */
708 struct pipe_sampler_state sampler
;
710 memset(&sampler
, 0, sizeof(sampler
));
711 sampler
.wrap_s
= PIPE_TEX_WRAP_CLAMP
;
712 sampler
.wrap_t
= PIPE_TEX_WRAP_CLAMP
;
713 sampler
.wrap_r
= PIPE_TEX_WRAP_CLAMP
;
714 sampler
.min_img_filter
= PIPE_TEX_FILTER_NEAREST
;
715 sampler
.min_mip_filter
= PIPE_TEX_MIPFILTER_NONE
;
716 sampler
.mag_img_filter
= PIPE_TEX_FILTER_NEAREST
;
717 sampler
.normalized_coords
= normalized
;
720 /* drawing a color image */
721 const struct pipe_sampler_state
*samplers
[PIPE_MAX_SAMPLERS
];
722 uint num
= MAX3(fpv
->drawpix_sampler
+ 1,
723 fpv
->pixelmap_sampler
+ 1,
724 st
->state
.num_frag_samplers
);
727 for (i
= 0; i
< st
->state
.num_frag_samplers
; i
++)
728 samplers
[i
] = &st
->state
.frag_samplers
[i
];
730 samplers
[fpv
->drawpix_sampler
] = &sampler
;
732 samplers
[fpv
->pixelmap_sampler
] = &sampler
;
734 cso_set_samplers(cso
, PIPE_SHADER_FRAGMENT
, num
, samplers
);
736 /* drawing a depth/stencil image */
737 const struct pipe_sampler_state
*samplers
[2] = {&sampler
, &sampler
};
739 cso_set_samplers(cso
, PIPE_SHADER_FRAGMENT
, num_sampler_view
, samplers
);
743 /* user textures, plus the drawpix textures */
745 /* drawing a color image */
746 struct pipe_sampler_view
*sampler_views
[PIPE_MAX_SAMPLERS
];
747 uint num
= MAX3(fpv
->drawpix_sampler
+ 1,
748 fpv
->pixelmap_sampler
+ 1,
749 st
->state
.num_sampler_views
[PIPE_SHADER_FRAGMENT
]);
751 memcpy(sampler_views
, st
->state
.frag_sampler_views
,
752 sizeof(sampler_views
));
754 sampler_views
[fpv
->drawpix_sampler
] = sv
[0];
756 sampler_views
[fpv
->pixelmap_sampler
] = sv
[1];
757 cso_set_sampler_views(cso
, PIPE_SHADER_FRAGMENT
, num
, sampler_views
);
759 /* drawing a depth/stencil image */
760 cso_set_sampler_views(cso
, PIPE_SHADER_FRAGMENT
, num_sampler_view
, sv
);
763 /* viewport state: viewport matching window dims */
764 cso_set_viewport_dims(cso
, fb_width
, fb_height
, TRUE
);
766 cso_set_vertex_elements(cso
, 3, st
->util_velems
);
767 cso_set_stream_outputs(cso
, 0, NULL
, NULL
);
769 /* Compute Gallium window coords (y=0=top) with pixel zoom.
770 * Recall that these coords are transformed by the current
771 * vertex shader and viewport transformation.
773 if (st_fb_orientation(ctx
->DrawBuffer
) == Y_0_BOTTOM
) {
774 y
= fb_height
- (int) (y
+ height
* ctx
->Pixel
.ZoomY
);
775 invertTex
= !invertTex
;
779 x1
= x
+ width
* ctx
->Pixel
.ZoomX
;
781 y1
= y
+ height
* ctx
->Pixel
.ZoomY
;
783 /* convert Z from [0,1] to [-1,-1] to match viewport Z scale/bias */
787 const float clip_x0
= x0
/ (float) fb_width
* 2.0f
- 1.0f
;
788 const float clip_y0
= y0
/ (float) fb_height
* 2.0f
- 1.0f
;
789 const float clip_x1
= x1
/ (float) fb_width
* 2.0f
- 1.0f
;
790 const float clip_y1
= y1
/ (float) fb_height
* 2.0f
- 1.0f
;
791 const float maxXcoord
= normalized
?
792 ((float) width
/ sv
[0]->texture
->width0
) : (float) width
;
793 const float maxYcoord
= normalized
794 ? ((float) height
/ sv
[0]->texture
->height0
) : (float) height
;
795 const float sLeft
= 0.0f
, sRight
= maxXcoord
;
796 const float tTop
= invertTex
? maxYcoord
: 0.0f
;
797 const float tBot
= invertTex
? 0.0f
: maxYcoord
;
799 if (!st_draw_quad(st
, clip_x0
, clip_y0
, clip_x1
, clip_y1
, z
,
800 sLeft
, tBot
, sRight
, tTop
, color
, 0)) {
801 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glDrawPixels");
806 cso_restore_state(cso
);
811 * Software fallback to do glDrawPixels(GL_STENCIL_INDEX) when we
812 * can't use a fragment shader to write stencil values.
815 draw_stencil_pixels(struct gl_context
*ctx
, GLint x
, GLint y
,
816 GLsizei width
, GLsizei height
, GLenum format
, GLenum type
,
817 const struct gl_pixelstore_attrib
*unpack
,
820 struct st_context
*st
= st_context(ctx
);
821 struct pipe_context
*pipe
= st
->pipe
;
822 struct st_renderbuffer
*strb
;
823 enum pipe_transfer_usage usage
;
824 struct pipe_transfer
*pt
;
825 const GLboolean zoom
= ctx
->Pixel
.ZoomX
!= 1.0 || ctx
->Pixel
.ZoomY
!= 1.0;
827 struct gl_pixelstore_attrib clippedUnpack
= *unpack
;
832 if (!_mesa_clip_drawpixels(ctx
, &x
, &y
, &width
, &height
,
834 /* totally clipped */
839 strb
= st_renderbuffer(ctx
->DrawBuffer
->
840 Attachment
[BUFFER_STENCIL
].Renderbuffer
);
842 if (st_fb_orientation(ctx
->DrawBuffer
) == Y_0_TOP
) {
843 y
= ctx
->DrawBuffer
->Height
- y
- height
;
846 if (format
== GL_STENCIL_INDEX
&&
847 _mesa_is_format_packed_depth_stencil(strb
->Base
.Format
)) {
848 /* writing stencil to a combined depth+stencil buffer */
849 usage
= PIPE_TRANSFER_READ_WRITE
;
852 usage
= PIPE_TRANSFER_WRITE
;
855 stmap
= pipe_transfer_map(pipe
, strb
->texture
,
856 strb
->surface
->u
.tex
.level
,
857 strb
->surface
->u
.tex
.first_layer
,
861 pixels
= _mesa_map_pbo_source(ctx
, &clippedUnpack
, pixels
);
864 sValues
= malloc(width
* sizeof(GLubyte
));
865 zValues
= malloc(width
* sizeof(GLuint
));
867 if (sValues
&& zValues
) {
869 for (row
= 0; row
< height
; row
++) {
870 GLfloat
*zValuesFloat
= (GLfloat
*)zValues
;
871 GLenum destType
= GL_UNSIGNED_BYTE
;
872 const void *source
= _mesa_image_address2d(&clippedUnpack
, pixels
,
876 _mesa_unpack_stencil_span(ctx
, width
, destType
, sValues
,
877 type
, source
, &clippedUnpack
,
878 ctx
->_ImageTransferState
);
880 if (format
== GL_DEPTH_STENCIL
) {
882 pt
->resource
->format
== PIPE_FORMAT_Z32_FLOAT_S8X24_UINT
?
883 GL_FLOAT
: GL_UNSIGNED_INT
;
885 _mesa_unpack_depth_span(ctx
, width
, ztype
, zValues
,
886 (1 << 24) - 1, type
, source
,
891 _mesa_problem(ctx
, "Gallium glDrawPixels(GL_STENCIL) with "
892 "zoom not complete");
898 if (st_fb_orientation(ctx
->DrawBuffer
) == Y_0_TOP
) {
899 spanY
= height
- row
- 1;
905 /* now pack the stencil (and Z) values in the dest format */
906 switch (pt
->resource
->format
) {
907 case PIPE_FORMAT_S8_UINT
:
909 ubyte
*dest
= stmap
+ spanY
* pt
->stride
;
910 assert(usage
== PIPE_TRANSFER_WRITE
);
911 memcpy(dest
, sValues
, width
);
914 case PIPE_FORMAT_Z24_UNORM_S8_UINT
:
915 if (format
== GL_DEPTH_STENCIL
) {
916 uint
*dest
= (uint
*) (stmap
+ spanY
* pt
->stride
);
918 assert(usage
== PIPE_TRANSFER_WRITE
);
919 for (k
= 0; k
< width
; k
++) {
920 dest
[k
] = zValues
[k
] | (sValues
[k
] << 24);
924 uint
*dest
= (uint
*) (stmap
+ spanY
* pt
->stride
);
926 assert(usage
== PIPE_TRANSFER_READ_WRITE
);
927 for (k
= 0; k
< width
; k
++) {
928 dest
[k
] = (dest
[k
] & 0xffffff) | (sValues
[k
] << 24);
932 case PIPE_FORMAT_S8_UINT_Z24_UNORM
:
933 if (format
== GL_DEPTH_STENCIL
) {
934 uint
*dest
= (uint
*) (stmap
+ spanY
* pt
->stride
);
936 assert(usage
== PIPE_TRANSFER_WRITE
);
937 for (k
= 0; k
< width
; k
++) {
938 dest
[k
] = (zValues
[k
] << 8) | (sValues
[k
] & 0xff);
942 uint
*dest
= (uint
*) (stmap
+ spanY
* pt
->stride
);
944 assert(usage
== PIPE_TRANSFER_READ_WRITE
);
945 for (k
= 0; k
< width
; k
++) {
946 dest
[k
] = (dest
[k
] & 0xffffff00) | (sValues
[k
] & 0xff);
950 case PIPE_FORMAT_Z32_FLOAT_S8X24_UINT
:
951 if (format
== GL_DEPTH_STENCIL
) {
952 uint
*dest
= (uint
*) (stmap
+ spanY
* pt
->stride
);
953 GLfloat
*destf
= (GLfloat
*)dest
;
955 assert(usage
== PIPE_TRANSFER_WRITE
);
956 for (k
= 0; k
< width
; k
++) {
957 destf
[k
*2] = zValuesFloat
[k
];
958 dest
[k
*2+1] = sValues
[k
] & 0xff;
962 uint
*dest
= (uint
*) (stmap
+ spanY
* pt
->stride
);
964 assert(usage
== PIPE_TRANSFER_READ_WRITE
);
965 for (k
= 0; k
< width
; k
++) {
966 dest
[k
*2+1] = sValues
[k
] & 0xff;
977 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glDrawPixels()");
983 _mesa_unmap_pbo_source(ctx
, &clippedUnpack
);
985 /* unmap the stencil buffer */
986 pipe_transfer_unmap(pipe
, pt
);
991 * Get fragment program variant for a glDrawPixels or glCopyPixels
992 * command for RGBA data.
994 static struct st_fp_variant
*
995 get_color_fp_variant(struct st_context
*st
)
997 struct gl_context
*ctx
= st
->ctx
;
998 struct st_fp_variant_key key
;
999 struct st_fp_variant
*fpv
;
1001 memset(&key
, 0, sizeof(key
));
1003 key
.st
= st
->has_shareable_shaders
? NULL
: st
;
1005 key
.scaleAndBias
= (ctx
->Pixel
.RedBias
!= 0.0 ||
1006 ctx
->Pixel
.RedScale
!= 1.0 ||
1007 ctx
->Pixel
.GreenBias
!= 0.0 ||
1008 ctx
->Pixel
.GreenScale
!= 1.0 ||
1009 ctx
->Pixel
.BlueBias
!= 0.0 ||
1010 ctx
->Pixel
.BlueScale
!= 1.0 ||
1011 ctx
->Pixel
.AlphaBias
!= 0.0 ||
1012 ctx
->Pixel
.AlphaScale
!= 1.0);
1013 key
.pixelMaps
= ctx
->Pixel
.MapColorFlag
;
1014 key
.clamp_color
= st
->clamp_frag_color_in_shader
&&
1015 ctx
->Color
._ClampFragmentColor
;
1017 fpv
= st_get_fp_variant(st
, st
->fp
, &key
);
1024 * Clamp glDrawPixels width and height to the maximum texture size.
1027 clamp_size(struct pipe_context
*pipe
, GLsizei
*width
, GLsizei
*height
,
1028 struct gl_pixelstore_attrib
*unpack
)
1031 1 << (pipe
->screen
->get_param(pipe
->screen
,
1032 PIPE_CAP_MAX_TEXTURE_2D_LEVELS
) - 1);
1034 if (*width
> maxSize
) {
1035 if (unpack
->RowLength
== 0)
1036 unpack
->RowLength
= *width
;
1039 if (*height
> maxSize
) {
1046 * Search the array of 4 swizzle components for the named component and return
1050 search_swizzle(const unsigned char swizzle
[4], unsigned component
)
1053 for (i
= 0; i
< 4; i
++) {
1054 if (swizzle
[i
] == component
)
1057 assert(!"search_swizzle() failed");
1063 * Set the sampler view's swizzle terms. This is used to handle RGBA
1064 * swizzling when the incoming image format isn't an exact match for
1065 * the actual texture format. For example, if we have glDrawPixels(
1066 * GL_RGBA, GL_UNSIGNED_BYTE) and we chose the texture format
1067 * PIPE_FORMAT_B8G8R8A8 then we can do use the sampler view swizzle to
1068 * avoid swizzling all the pixels in software in the texstore code.
1071 setup_sampler_swizzle(struct pipe_sampler_view
*sv
, GLenum format
, GLenum type
)
1073 if ((format
== GL_RGBA
|| format
== GL_BGRA
) && type
== GL_UNSIGNED_BYTE
) {
1074 const struct util_format_description
*desc
=
1075 util_format_description(sv
->texture
->format
);
1076 unsigned c0
, c1
, c2
, c3
;
1078 /* Every gallium driver supports at least one 32-bit packed RGBA format.
1079 * We must have chosen one for (GL_RGBA, GL_UNSIGNED_BYTE).
1081 assert(desc
->block
.bits
== 32);
1083 /* invert the format's swizzle to setup the sampler's swizzle */
1084 if (format
== GL_RGBA
) {
1085 c0
= PIPE_SWIZZLE_X
;
1086 c1
= PIPE_SWIZZLE_Y
;
1087 c2
= PIPE_SWIZZLE_Z
;
1088 c3
= PIPE_SWIZZLE_W
;
1091 assert(format
== GL_BGRA
);
1092 c0
= PIPE_SWIZZLE_Z
;
1093 c1
= PIPE_SWIZZLE_Y
;
1094 c2
= PIPE_SWIZZLE_X
;
1095 c3
= PIPE_SWIZZLE_W
;
1097 sv
->swizzle_r
= search_swizzle(desc
->swizzle
, c0
);
1098 sv
->swizzle_g
= search_swizzle(desc
->swizzle
, c1
);
1099 sv
->swizzle_b
= search_swizzle(desc
->swizzle
, c2
);
1100 sv
->swizzle_a
= search_swizzle(desc
->swizzle
, c3
);
1103 /* use the default sampler swizzle */
1109 * Called via ctx->Driver.DrawPixels()
1112 st_DrawPixels(struct gl_context
*ctx
, GLint x
, GLint y
,
1113 GLsizei width
, GLsizei height
,
1114 GLenum format
, GLenum type
,
1115 const struct gl_pixelstore_attrib
*unpack
, const void *pixels
)
1118 struct st_context
*st
= st_context(ctx
);
1119 struct pipe_context
*pipe
= st
->pipe
;
1120 GLboolean write_stencil
= GL_FALSE
, write_depth
= GL_FALSE
;
1121 struct pipe_sampler_view
*sv
[2] = { NULL
};
1122 int num_sampler_view
= 1;
1123 struct gl_pixelstore_attrib clippedUnpack
;
1124 struct st_fp_variant
*fpv
= NULL
;
1125 struct pipe_resource
*pt
;
1127 /* Mesa state should be up to date by now */
1128 assert(ctx
->NewState
== 0x0);
1130 _mesa_update_draw_buffer_bounds(ctx
, ctx
->DrawBuffer
);
1132 st_flush_bitmap_cache(st
);
1133 st_invalidate_readpix_cache(st
);
1135 st_validate_state(st
, ST_PIPELINE_META
);
1137 /* Limit the size of the glDrawPixels to the max texture size.
1138 * Strictly speaking, that's not correct but since we don't handle
1139 * larger images yet, this is better than crashing.
1141 clippedUnpack
= *unpack
;
1142 unpack
= &clippedUnpack
;
1143 clamp_size(st
->pipe
, &width
, &height
, &clippedUnpack
);
1145 if (format
== GL_DEPTH_STENCIL
)
1146 write_stencil
= write_depth
= GL_TRUE
;
1147 else if (format
== GL_STENCIL_INDEX
)
1148 write_stencil
= GL_TRUE
;
1149 else if (format
== GL_DEPTH_COMPONENT
)
1150 write_depth
= GL_TRUE
;
1152 if (write_stencil
&&
1153 !pipe
->screen
->get_param(pipe
->screen
, PIPE_CAP_SHADER_STENCIL_EXPORT
)) {
1154 /* software fallback */
1155 draw_stencil_pixels(ctx
, x
, y
, width
, height
, format
, type
,
1160 /* Put glDrawPixels image into a texture */
1161 pt
= make_texture(st
, width
, height
, format
, type
, unpack
, pixels
);
1163 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glDrawPixels");
1167 st_make_passthrough_vertex_shader(st
);
1170 * Get vertex/fragment shaders
1172 if (write_depth
|| write_stencil
) {
1173 driver_fp
= get_drawpix_z_stencil_program(st
, write_depth
,
1177 fpv
= get_color_fp_variant(st
);
1179 driver_fp
= fpv
->driver_shader
;
1181 if (ctx
->Pixel
.MapColorFlag
) {
1182 pipe_sampler_view_reference(&sv
[1],
1183 st
->pixel_xfer
.pixelmap_sampler_view
);
1187 /* compiling a new fragment shader variant added new state constants
1188 * into the constant buffer, we need to update them
1190 st_upload_constants(st
, &st
->fp
->Base
);
1193 /* create sampler view for the image */
1194 sv
[0] = st_create_texture_sampler_view(st
->pipe
, pt
);
1196 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glDrawPixels");
1197 pipe_resource_reference(&pt
, NULL
);
1201 /* Set up the sampler view's swizzle */
1202 setup_sampler_swizzle(sv
[0], format
, type
);
1204 /* Create a second sampler view to read stencil. The stencil is
1205 * written using the shader stencil export functionality.
1207 if (write_stencil
) {
1208 enum pipe_format stencil_format
=
1209 util_format_stencil_only(pt
->format
);
1210 /* we should not be doing pixel map/transfer (see above) */
1211 assert(num_sampler_view
== 1);
1212 sv
[1] = st_create_texture_sampler_view_format(st
->pipe
, pt
,
1215 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glDrawPixels");
1216 pipe_resource_reference(&pt
, NULL
);
1217 pipe_sampler_view_reference(&sv
[0], NULL
);
1223 draw_textured_quad(ctx
, x
, y
, ctx
->Current
.RasterPos
[2],
1225 ctx
->Pixel
.ZoomX
, ctx
->Pixel
.ZoomY
,
1230 ctx
->Current
.RasterColor
,
1231 GL_FALSE
, write_depth
, write_stencil
);
1232 pipe_sampler_view_reference(&sv
[0], NULL
);
1233 if (num_sampler_view
> 1)
1234 pipe_sampler_view_reference(&sv
[1], NULL
);
1236 /* free the texture (but may persist in the cache) */
1237 pipe_resource_reference(&pt
, NULL
);
1243 * Software fallback for glCopyPixels(GL_STENCIL).
1246 copy_stencil_pixels(struct gl_context
*ctx
, GLint srcx
, GLint srcy
,
1247 GLsizei width
, GLsizei height
,
1248 GLint dstx
, GLint dsty
)
1250 struct st_renderbuffer
*rbDraw
;
1251 struct pipe_context
*pipe
= st_context(ctx
)->pipe
;
1252 enum pipe_transfer_usage usage
;
1253 struct pipe_transfer
*ptDraw
;
1258 buffer
= malloc(width
* height
* sizeof(ubyte
));
1260 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glCopyPixels(stencil)");
1264 /* Get the dest renderbuffer */
1265 rbDraw
= st_renderbuffer(ctx
->DrawBuffer
->
1266 Attachment
[BUFFER_STENCIL
].Renderbuffer
);
1268 /* this will do stencil pixel transfer ops */
1269 _mesa_readpixels(ctx
, srcx
, srcy
, width
, height
,
1270 GL_STENCIL_INDEX
, GL_UNSIGNED_BYTE
,
1271 &ctx
->DefaultPacking
, buffer
);
1274 /* debug code: dump stencil values */
1276 for (row
= 0; row
< height
; row
++) {
1277 printf("%3d: ", row
);
1278 for (col
= 0; col
< width
; col
++) {
1279 printf("%02x ", buffer
[col
+ row
* width
]);
1285 if (_mesa_is_format_packed_depth_stencil(rbDraw
->Base
.Format
))
1286 usage
= PIPE_TRANSFER_READ_WRITE
;
1288 usage
= PIPE_TRANSFER_WRITE
;
1290 if (st_fb_orientation(ctx
->DrawBuffer
) == Y_0_TOP
) {
1291 dsty
= rbDraw
->Base
.Height
- dsty
- height
;
1294 assert(util_format_get_blockwidth(rbDraw
->texture
->format
) == 1);
1295 assert(util_format_get_blockheight(rbDraw
->texture
->format
) == 1);
1297 /* map the stencil buffer */
1298 drawMap
= pipe_transfer_map(pipe
,
1300 rbDraw
->surface
->u
.tex
.level
,
1301 rbDraw
->surface
->u
.tex
.first_layer
,
1303 width
, height
, &ptDraw
);
1306 /* XXX PixelZoom not handled yet */
1307 for (i
= 0; i
< height
; i
++) {
1314 if (st_fb_orientation(ctx
->DrawBuffer
) == Y_0_TOP
) {
1318 dst
= drawMap
+ y
* ptDraw
->stride
;
1319 src
= buffer
+ i
* width
;
1321 _mesa_pack_ubyte_stencil_row(rbDraw
->Base
.Format
, width
, src
, dst
);
1326 /* unmap the stencil buffer */
1327 pipe_transfer_unmap(pipe
, ptDraw
);
1332 * Return renderbuffer to use for reading color pixels for glCopyPixels
1334 static struct st_renderbuffer
*
1335 st_get_color_read_renderbuffer(struct gl_context
*ctx
)
1337 struct gl_framebuffer
*fb
= ctx
->ReadBuffer
;
1338 struct st_renderbuffer
*strb
=
1339 st_renderbuffer(fb
->_ColorReadBuffer
);
1346 * Try to do a glCopyPixels for simple cases with a blit by calling
1349 * We can do this when we're copying color pixels (depth/stencil
1350 * eventually) with no pixel zoom, no pixel transfer ops, no
1351 * per-fragment ops, and the src/dest regions don't overlap.
1354 blit_copy_pixels(struct gl_context
*ctx
, GLint srcx
, GLint srcy
,
1355 GLsizei width
, GLsizei height
,
1356 GLint dstx
, GLint dsty
, GLenum type
)
1358 struct st_context
*st
= st_context(ctx
);
1359 struct pipe_context
*pipe
= st
->pipe
;
1360 struct pipe_screen
*screen
= pipe
->screen
;
1361 struct gl_pixelstore_attrib pack
, unpack
;
1362 GLint readX
, readY
, readW
, readH
, drawX
, drawY
, drawW
, drawH
;
1364 if (type
== GL_COLOR
&&
1365 ctx
->Pixel
.ZoomX
== 1.0 &&
1366 ctx
->Pixel
.ZoomY
== 1.0 &&
1367 ctx
->_ImageTransferState
== 0x0 &&
1368 !ctx
->Color
.BlendEnabled
&&
1369 !ctx
->Color
.AlphaEnabled
&&
1370 (!ctx
->Color
.ColorLogicOpEnabled
|| ctx
->Color
.LogicOp
== GL_COPY
) &&
1372 !ctx
->Fog
.Enabled
&&
1373 !ctx
->Stencil
.Enabled
&&
1374 !ctx
->FragmentProgram
.Enabled
&&
1375 !ctx
->VertexProgram
.Enabled
&&
1376 !ctx
->_Shader
->CurrentProgram
[MESA_SHADER_FRAGMENT
] &&
1377 !_mesa_ati_fragment_shader_enabled(ctx
) &&
1378 ctx
->DrawBuffer
->_NumColorDrawBuffers
== 1 &&
1379 !ctx
->Query
.CondRenderQuery
&&
1380 !ctx
->Query
.CurrentOcclusionObject
) {
1381 struct st_renderbuffer
*rbRead
, *rbDraw
;
1384 * Clip the read region against the src buffer bounds.
1385 * We'll still allocate a temporary buffer/texture for the original
1386 * src region size but we'll only read the region which is on-screen.
1387 * This may mean that we draw garbage pixels into the dest region, but
1394 pack
= ctx
->DefaultPacking
;
1395 if (!_mesa_clip_readpixels(ctx
, &readX
, &readY
, &readW
, &readH
, &pack
))
1396 return GL_TRUE
; /* all done */
1398 /* clip against dest buffer bounds and scissor box */
1399 drawX
= dstx
+ pack
.SkipPixels
;
1400 drawY
= dsty
+ pack
.SkipRows
;
1402 if (!_mesa_clip_drawpixels(ctx
, &drawX
, &drawY
, &readW
, &readH
, &unpack
))
1403 return GL_TRUE
; /* all done */
1405 readX
= readX
- pack
.SkipPixels
+ unpack
.SkipPixels
;
1406 readY
= readY
- pack
.SkipRows
+ unpack
.SkipRows
;
1411 rbRead
= st_get_color_read_renderbuffer(ctx
);
1412 rbDraw
= st_renderbuffer(ctx
->DrawBuffer
->_ColorDrawBuffers
[0]);
1414 /* Flip src/dst position depending on the orientation of buffers. */
1415 if (st_fb_orientation(ctx
->ReadBuffer
) == Y_0_TOP
) {
1416 readY
= rbRead
->Base
.Height
- readY
;
1420 if (st_fb_orientation(ctx
->DrawBuffer
) == Y_0_TOP
) {
1421 /* We can't flip the destination for pipe->blit, so we only adjust
1422 * its position and flip the source.
1424 drawY
= rbDraw
->Base
.Height
- drawY
- drawH
;
1429 if (rbRead
!= rbDraw
||
1430 !_mesa_regions_overlap(readX
, readY
, readX
+ readW
, readY
+ readH
,
1431 drawX
, drawY
, drawX
+ drawW
, drawY
+ drawH
)) {
1432 struct pipe_blit_info blit
;
1434 memset(&blit
, 0, sizeof(blit
));
1435 blit
.src
.resource
= rbRead
->texture
;
1436 blit
.src
.level
= rbRead
->surface
->u
.tex
.level
;
1437 blit
.src
.format
= rbRead
->texture
->format
;
1438 blit
.src
.box
.x
= readX
;
1439 blit
.src
.box
.y
= readY
;
1440 blit
.src
.box
.z
= rbRead
->surface
->u
.tex
.first_layer
;
1441 blit
.src
.box
.width
= readW
;
1442 blit
.src
.box
.height
= readH
;
1443 blit
.src
.box
.depth
= 1;
1444 blit
.dst
.resource
= rbDraw
->texture
;
1445 blit
.dst
.level
= rbDraw
->surface
->u
.tex
.level
;
1446 blit
.dst
.format
= rbDraw
->texture
->format
;
1447 blit
.dst
.box
.x
= drawX
;
1448 blit
.dst
.box
.y
= drawY
;
1449 blit
.dst
.box
.z
= rbDraw
->surface
->u
.tex
.first_layer
;
1450 blit
.dst
.box
.width
= drawW
;
1451 blit
.dst
.box
.height
= drawH
;
1452 blit
.dst
.box
.depth
= 1;
1453 blit
.mask
= PIPE_MASK_RGBA
;
1454 blit
.filter
= PIPE_TEX_FILTER_NEAREST
;
1456 if (ctx
->DrawBuffer
!= ctx
->WinSysDrawBuffer
)
1457 st_window_rectangles_to_blit(ctx
, &blit
);
1459 if (screen
->is_format_supported(screen
, blit
.src
.format
,
1460 blit
.src
.resource
->target
,
1461 blit
.src
.resource
->nr_samples
,
1462 blit
.src
.resource
->nr_storage_samples
,
1463 PIPE_BIND_SAMPLER_VIEW
) &&
1464 screen
->is_format_supported(screen
, blit
.dst
.format
,
1465 blit
.dst
.resource
->target
,
1466 blit
.dst
.resource
->nr_samples
,
1467 blit
.dst
.resource
->nr_storage_samples
,
1468 PIPE_BIND_RENDER_TARGET
)) {
1469 pipe
->blit(pipe
, &blit
);
1480 st_CopyPixels(struct gl_context
*ctx
, GLint srcx
, GLint srcy
,
1481 GLsizei width
, GLsizei height
,
1482 GLint dstx
, GLint dsty
, GLenum type
)
1484 struct st_context
*st
= st_context(ctx
);
1485 struct pipe_context
*pipe
= st
->pipe
;
1486 struct pipe_screen
*screen
= pipe
->screen
;
1487 struct st_renderbuffer
*rbRead
;
1489 struct pipe_resource
*pt
;
1490 struct pipe_sampler_view
*sv
[2] = { NULL
};
1491 struct st_fp_variant
*fpv
= NULL
;
1492 int num_sampler_view
= 1;
1493 enum pipe_format srcFormat
;
1495 GLboolean invertTex
= GL_FALSE
;
1496 GLint readX
, readY
, readW
, readH
;
1497 struct gl_pixelstore_attrib pack
= ctx
->DefaultPacking
;
1499 _mesa_update_draw_buffer_bounds(ctx
, ctx
->DrawBuffer
);
1501 st_flush_bitmap_cache(st
);
1502 st_invalidate_readpix_cache(st
);
1504 st_validate_state(st
, ST_PIPELINE_META
);
1506 if (type
== GL_DEPTH_STENCIL
) {
1507 /* XXX make this more efficient */
1508 st_CopyPixels(ctx
, srcx
, srcy
, width
, height
, dstx
, dsty
, GL_STENCIL
);
1509 st_CopyPixels(ctx
, srcx
, srcy
, width
, height
, dstx
, dsty
, GL_DEPTH
);
1513 if (type
== GL_STENCIL
) {
1514 /* can't use texturing to do stencil */
1515 copy_stencil_pixels(ctx
, srcx
, srcy
, width
, height
, dstx
, dsty
);
1519 if (blit_copy_pixels(ctx
, srcx
, srcy
, width
, height
, dstx
, dsty
, type
))
1523 * The subsequent code implements glCopyPixels by copying the source
1524 * pixels into a temporary texture that's then applied to a textured quad.
1525 * When we draw the textured quad, all the usual per-fragment operations
1529 st_make_passthrough_vertex_shader(st
);
1532 * Get vertex/fragment shaders
1534 if (type
== GL_COLOR
) {
1535 fpv
= get_color_fp_variant(st
);
1537 rbRead
= st_get_color_read_renderbuffer(ctx
);
1539 driver_fp
= fpv
->driver_shader
;
1541 if (ctx
->Pixel
.MapColorFlag
) {
1542 pipe_sampler_view_reference(&sv
[1],
1543 st
->pixel_xfer
.pixelmap_sampler_view
);
1547 /* compiling a new fragment shader variant added new state constants
1548 * into the constant buffer, we need to update them
1550 st_upload_constants(st
, &st
->fp
->Base
);
1553 assert(type
== GL_DEPTH
);
1554 rbRead
= st_renderbuffer(ctx
->ReadBuffer
->
1555 Attachment
[BUFFER_DEPTH
].Renderbuffer
);
1557 driver_fp
= get_drawpix_z_stencil_program(st
, GL_TRUE
, GL_FALSE
);
1560 /* Choose the format for the temporary texture. */
1561 srcFormat
= rbRead
->texture
->format
;
1562 srcBind
= PIPE_BIND_SAMPLER_VIEW
|
1563 (type
== GL_COLOR
? PIPE_BIND_RENDER_TARGET
: PIPE_BIND_DEPTH_STENCIL
);
1565 if (!screen
->is_format_supported(screen
, srcFormat
, st
->internal_target
, 0,
1567 /* srcFormat is non-renderable. Find a compatible renderable format. */
1568 if (type
== GL_DEPTH
) {
1569 srcFormat
= st_choose_format(st
, GL_DEPTH_COMPONENT
, GL_NONE
,
1570 GL_NONE
, st
->internal_target
, 0, 0,
1574 assert(type
== GL_COLOR
);
1576 if (util_format_is_float(srcFormat
)) {
1577 srcFormat
= st_choose_format(st
, GL_RGBA32F
, GL_NONE
,
1578 GL_NONE
, st
->internal_target
, 0, 0,
1581 else if (util_format_is_pure_sint(srcFormat
)) {
1582 srcFormat
= st_choose_format(st
, GL_RGBA32I
, GL_NONE
,
1583 GL_NONE
, st
->internal_target
, 0, 0,
1586 else if (util_format_is_pure_uint(srcFormat
)) {
1587 srcFormat
= st_choose_format(st
, GL_RGBA32UI
, GL_NONE
,
1588 GL_NONE
, st
->internal_target
, 0, 0,
1591 else if (util_format_is_snorm(srcFormat
)) {
1592 srcFormat
= st_choose_format(st
, GL_RGBA16_SNORM
, GL_NONE
,
1593 GL_NONE
, st
->internal_target
, 0, 0,
1597 srcFormat
= st_choose_format(st
, GL_RGBA
, GL_NONE
,
1598 GL_NONE
, st
->internal_target
, 0, 0,
1603 if (srcFormat
== PIPE_FORMAT_NONE
) {
1604 assert(0 && "cannot choose a format for src of CopyPixels");
1609 /* Invert src region if needed */
1610 if (st_fb_orientation(ctx
->ReadBuffer
) == Y_0_TOP
) {
1611 srcy
= ctx
->ReadBuffer
->Height
- srcy
- height
;
1612 invertTex
= !invertTex
;
1615 /* Clip the read region against the src buffer bounds.
1616 * We'll still allocate a temporary buffer/texture for the original
1617 * src region size but we'll only read the region which is on-screen.
1618 * This may mean that we draw garbage pixels into the dest region, but
1625 if (!_mesa_clip_readpixels(ctx
, &readX
, &readY
, &readW
, &readH
, &pack
)) {
1626 /* The source region is completely out of bounds. Do nothing.
1627 * The GL spec says "Results of copies from outside the window,
1628 * or from regions of the window that are not exposed, are
1629 * hardware dependent and undefined."
1634 readW
= MAX2(0, readW
);
1635 readH
= MAX2(0, readH
);
1637 /* Allocate the temporary texture. */
1638 pt
= alloc_texture(st
, width
, height
, srcFormat
, srcBind
);
1642 sv
[0] = st_create_texture_sampler_view(st
->pipe
, pt
);
1644 pipe_resource_reference(&pt
, NULL
);
1648 /* Copy the src region to the temporary texture. */
1650 struct pipe_blit_info blit
;
1652 memset(&blit
, 0, sizeof(blit
));
1653 blit
.src
.resource
= rbRead
->texture
;
1654 blit
.src
.level
= rbRead
->surface
->u
.tex
.level
;
1655 blit
.src
.format
= rbRead
->texture
->format
;
1656 blit
.src
.box
.x
= readX
;
1657 blit
.src
.box
.y
= readY
;
1658 blit
.src
.box
.z
= rbRead
->surface
->u
.tex
.first_layer
;
1659 blit
.src
.box
.width
= readW
;
1660 blit
.src
.box
.height
= readH
;
1661 blit
.src
.box
.depth
= 1;
1662 blit
.dst
.resource
= pt
;
1664 blit
.dst
.format
= pt
->format
;
1665 blit
.dst
.box
.x
= pack
.SkipPixels
;
1666 blit
.dst
.box
.y
= pack
.SkipRows
;
1668 blit
.dst
.box
.width
= readW
;
1669 blit
.dst
.box
.height
= readH
;
1670 blit
.dst
.box
.depth
= 1;
1671 blit
.mask
= util_format_get_mask(pt
->format
) & ~PIPE_MASK_S
;
1672 blit
.filter
= PIPE_TEX_FILTER_NEAREST
;
1674 pipe
->blit(pipe
, &blit
);
1677 /* OK, the texture 'pt' contains the src image/pixels. Now draw a
1678 * textured quad with that texture.
1680 draw_textured_quad(ctx
, dstx
, dsty
, ctx
->Current
.RasterPos
[2],
1681 width
, height
, ctx
->Pixel
.ZoomX
, ctx
->Pixel
.ZoomY
,
1686 ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR0
],
1687 invertTex
, GL_FALSE
, GL_FALSE
);
1689 pipe_resource_reference(&pt
, NULL
);
1690 pipe_sampler_view_reference(&sv
[0], NULL
);
1695 void st_init_drawpixels_functions(struct dd_function_table
*functions
)
1697 functions
->DrawPixels
= st_DrawPixels
;
1698 functions
->CopyPixels
= st_CopyPixels
;
1703 st_destroy_drawpix(struct st_context
*st
)
1707 for (i
= 0; i
< ARRAY_SIZE(st
->drawpix
.zs_shaders
); i
++) {
1708 if (st
->drawpix
.zs_shaders
[i
])
1709 cso_delete_fragment_shader(st
->cso_context
,
1710 st
->drawpix
.zs_shaders
[i
]);
1713 if (st
->passthrough_vs
)
1714 cso_delete_vertex_shader(st
->cso_context
, st
->passthrough_vs
);
1716 /* Free cache data */
1717 for (i
= 0; i
< ARRAY_SIZE(st
->drawpix_cache
.entries
); i
++) {
1718 struct drawpix_cache_entry
*entry
= &st
->drawpix_cache
.entries
[i
];
1720 pipe_resource_reference(&entry
->texture
, NULL
);