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/imports.h"
34 #include "main/image.h"
35 #include "main/bufferobj.h"
36 #include "main/blit.h"
37 #include "main/format_pack.h"
38 #include "main/framebuffer.h"
39 #include "main/macros.h"
40 #include "main/mtypes.h"
41 #include "main/pack.h"
43 #include "main/readpix.h"
44 #include "main/state.h"
45 #include "main/texformat.h"
46 #include "main/teximage.h"
47 #include "main/texstore.h"
48 #include "main/glformats.h"
49 #include "program/program.h"
50 #include "program/prog_print.h"
51 #include "program/prog_instruction.h"
54 #include "st_atom_constbuf.h"
55 #include "st_cb_bitmap.h"
56 #include "st_cb_drawpixels.h"
57 #include "st_cb_readpixels.h"
58 #include "st_cb_fbo.h"
59 #include "st_context.h"
62 #include "st_format.h"
63 #include "st_program.h"
64 #include "st_sampler_view.h"
65 #include "st_scissor.h"
66 #include "st_texture.h"
68 #include "pipe/p_context.h"
69 #include "pipe/p_defines.h"
70 #include "tgsi/tgsi_ureg.h"
71 #include "util/u_format.h"
72 #include "util/u_inlines.h"
73 #include "util/u_math.h"
74 #include "util/u_tile.h"
75 #include "cso_cache/cso_context.h"
79 * We have a simple glDrawPixels cache to try to optimize the case where the
80 * same image is drawn over and over again. It basically works as follows:
82 * 1. After we construct a texture map with the image and draw it, we do
83 * not discard the texture. We keep it around, plus we note the
84 * glDrawPixels width, height, format, etc. parameters and keep a copy
85 * of the image in a malloc'd buffer.
87 * 2. On the next glDrawPixels we check if the parameters match the previous
88 * call. If those match, we check if the image matches the previous image
89 * via a memcmp() call. If everything matches, we re-use the previous
90 * texture, thereby avoiding the cost creating a new texture and copying
93 * The effectiveness of this cache depends upon:
94 * 1. If the memcmp() finds a difference, it happens relatively quickly.
95 Hopefully, not just the last pixels differ!
96 * 2. If the memcmp() finds no difference, doing that check is faster than
97 * creating and loading a texture.
100 * 1. We don't support any pixel unpacking parameters.
101 * 2. We don't try to cache images in Pixel Buffer Objects.
102 * 3. Instead of saving the whole image, perhaps some sort of reliable
103 * checksum function could be used instead.
105 #define USE_DRAWPIXELS_CACHE 1
110 * Create fragment program that does a TEX() instruction to get a Z and/or
111 * stencil value value, then writes to FRAG_RESULT_DEPTH/FRAG_RESULT_STENCIL.
112 * Used for glDrawPixels(GL_DEPTH_COMPONENT / GL_STENCIL_INDEX).
113 * Pass fragment color through as-is.
115 * \return CSO of the fragment shader.
118 get_drawpix_z_stencil_program(struct st_context
*st
,
119 GLboolean write_depth
,
120 GLboolean write_stencil
)
122 struct ureg_program
*ureg
;
123 struct ureg_src depth_sampler
, stencil_sampler
;
124 struct ureg_src texcoord
, color
;
125 struct ureg_dst out_color
, out_depth
, out_stencil
;
126 const GLuint shaderIndex
= write_depth
* 2 + write_stencil
;
129 assert(shaderIndex
< ARRAY_SIZE(st
->drawpix
.zs_shaders
));
131 if (st
->drawpix
.zs_shaders
[shaderIndex
]) {
132 /* already have the proper shader */
133 return st
->drawpix
.zs_shaders
[shaderIndex
];
136 ureg
= ureg_create(PIPE_SHADER_FRAGMENT
);
140 ureg_property(ureg
, TGSI_PROPERTY_FS_COLOR0_WRITES_ALL_CBUFS
, TRUE
);
143 color
= ureg_DECL_fs_input(ureg
, TGSI_SEMANTIC_COLOR
, 0,
144 TGSI_INTERPOLATE_COLOR
);
145 out_color
= ureg_DECL_output(ureg
, TGSI_SEMANTIC_COLOR
, 0);
147 depth_sampler
= ureg_DECL_sampler(ureg
, 0);
148 ureg_DECL_sampler_view(ureg
, 0, TGSI_TEXTURE_2D
,
149 TGSI_RETURN_TYPE_FLOAT
,
150 TGSI_RETURN_TYPE_FLOAT
,
151 TGSI_RETURN_TYPE_FLOAT
,
152 TGSI_RETURN_TYPE_FLOAT
);
153 out_depth
= ureg_DECL_output(ureg
, TGSI_SEMANTIC_POSITION
, 0);
157 stencil_sampler
= ureg_DECL_sampler(ureg
, 1);
158 ureg_DECL_sampler_view(ureg
, 1, TGSI_TEXTURE_2D
,
159 TGSI_RETURN_TYPE_UINT
,
160 TGSI_RETURN_TYPE_UINT
,
161 TGSI_RETURN_TYPE_UINT
,
162 TGSI_RETURN_TYPE_UINT
);
163 out_stencil
= ureg_DECL_output(ureg
, TGSI_SEMANTIC_STENCIL
, 0);
166 texcoord
= ureg_DECL_fs_input(ureg
,
167 st
->needs_texcoord_semantic
?
168 TGSI_SEMANTIC_TEXCOORD
:
169 TGSI_SEMANTIC_GENERIC
,
170 0, TGSI_INTERPOLATE_LINEAR
);
173 ureg_TEX(ureg
, ureg_writemask(out_depth
, TGSI_WRITEMASK_Z
),
174 TGSI_TEXTURE_2D
, texcoord
, depth_sampler
);
175 ureg_MOV(ureg
, out_color
, color
);
179 ureg_TEX(ureg
, ureg_writemask(out_stencil
, TGSI_WRITEMASK_Y
),
180 TGSI_TEXTURE_2D
, texcoord
, stencil_sampler
);
183 cso
= ureg_create_shader_and_destroy(ureg
, st
->pipe
);
185 /* save the new shader */
186 st
->drawpix
.zs_shaders
[shaderIndex
] = cso
;
192 * Create a simple vertex shader that just passes through the
193 * vertex position and texcoord (and optionally, color).
196 make_passthrough_vertex_shader(struct st_context
*st
,
199 const enum tgsi_semantic texcoord_semantic
= st
->needs_texcoord_semantic
?
200 TGSI_SEMANTIC_TEXCOORD
: TGSI_SEMANTIC_GENERIC
;
202 if (!st
->drawpix
.vert_shaders
[passColor
]) {
203 struct ureg_program
*ureg
= ureg_create( PIPE_SHADER_VERTEX
);
208 /* MOV result.pos, vertex.pos; */
210 ureg_DECL_output( ureg
, TGSI_SEMANTIC_POSITION
, 0 ),
211 ureg_DECL_vs_input( ureg
, 0 ));
214 /* MOV result.color0, vertex.attr[1]; */
216 ureg_DECL_output( ureg
, TGSI_SEMANTIC_COLOR
, 0 ),
217 ureg_DECL_vs_input( ureg
, 1 ));
220 /* MOV result.texcoord0, vertex.attr[2]; */
222 ureg_DECL_output( ureg
, texcoord_semantic
, 0 ),
223 ureg_DECL_vs_input( ureg
, 2 ));
227 st
->drawpix
.vert_shaders
[passColor
] =
228 ureg_create_shader_and_destroy( ureg
, st
->pipe
);
231 return st
->drawpix
.vert_shaders
[passColor
];
236 * Return a texture internalFormat for drawing/copying an image
237 * of the given format and type.
240 internal_format(struct gl_context
*ctx
, GLenum format
, GLenum type
)
243 case GL_DEPTH_COMPONENT
:
245 case GL_UNSIGNED_SHORT
:
246 return GL_DEPTH_COMPONENT16
;
248 case GL_UNSIGNED_INT
:
249 return GL_DEPTH_COMPONENT32
;
252 if (ctx
->Extensions
.ARB_depth_buffer_float
)
253 return GL_DEPTH_COMPONENT32F
;
255 return GL_DEPTH_COMPONENT
;
258 return GL_DEPTH_COMPONENT
;
261 case GL_DEPTH_STENCIL
:
263 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV
:
264 return GL_DEPTH32F_STENCIL8
;
266 case GL_UNSIGNED_INT_24_8
:
268 return GL_DEPTH24_STENCIL8
;
271 case GL_STENCIL_INDEX
:
272 return GL_STENCIL_INDEX
;
275 if (_mesa_is_enum_format_integer(format
)) {
279 case GL_UNSIGNED_BYTE
:
283 case GL_UNSIGNED_SHORT
:
287 case GL_UNSIGNED_INT
:
290 assert(0 && "Unexpected type in internal_format()");
291 return GL_RGBA_INTEGER
;
296 case GL_UNSIGNED_BYTE
:
297 case GL_UNSIGNED_INT_8_8_8_8
:
298 case GL_UNSIGNED_INT_8_8_8_8_REV
:
302 case GL_UNSIGNED_BYTE_3_3_2
:
303 case GL_UNSIGNED_BYTE_2_3_3_REV
:
306 case GL_UNSIGNED_SHORT_4_4_4_4
:
307 case GL_UNSIGNED_SHORT_4_4_4_4_REV
:
310 case GL_UNSIGNED_SHORT_5_6_5
:
311 case GL_UNSIGNED_SHORT_5_6_5_REV
:
314 case GL_UNSIGNED_SHORT_5_5_5_1
:
315 case GL_UNSIGNED_SHORT_1_5_5_5_REV
:
318 case GL_UNSIGNED_INT_10_10_10_2
:
319 case GL_UNSIGNED_INT_2_10_10_10_REV
:
322 case GL_UNSIGNED_SHORT
:
323 case GL_UNSIGNED_INT
:
328 ctx
->Extensions
.EXT_texture_snorm
? GL_RGBA8_SNORM
: GL_RGBA8
;
333 ctx
->Extensions
.EXT_texture_snorm
? GL_RGBA16_SNORM
: GL_RGBA16
;
335 case GL_HALF_FLOAT_ARB
:
337 ctx
->Extensions
.ARB_texture_float
? GL_RGBA16F
:
338 ctx
->Extensions
.EXT_texture_snorm
? GL_RGBA16_SNORM
: GL_RGBA16
;
343 ctx
->Extensions
.ARB_texture_float
? GL_RGBA32F
:
344 ctx
->Extensions
.EXT_texture_snorm
? GL_RGBA16_SNORM
: GL_RGBA16
;
346 case GL_UNSIGNED_INT_5_9_9_9_REV
:
347 assert(ctx
->Extensions
.EXT_texture_shared_exponent
);
350 case GL_UNSIGNED_INT_10F_11F_11F_REV
:
351 assert(ctx
->Extensions
.EXT_packed_float
);
352 return GL_R11F_G11F_B10F
;
360 * Create a temporary texture to hold an image of the given size.
361 * If width, height are not POT and the driver only handles POT textures,
362 * allocate the next larger size of texture that is POT.
364 static struct pipe_resource
*
365 alloc_texture(struct st_context
*st
, GLsizei width
, GLsizei height
,
366 enum pipe_format texFormat
, unsigned bind
)
368 struct pipe_resource
*pt
;
370 pt
= st_texture_create(st
, st
->internal_target
, texFormat
, 0,
371 width
, height
, 1, 1, 0, bind
);
378 * Search the cache for an image which matches the given parameters.
379 * \return pipe_resource pointer if found, NULL if not found.
381 static struct pipe_resource
*
382 search_drawpixels_cache(struct st_context
*st
,
383 GLsizei width
, GLsizei height
,
384 GLenum format
, GLenum type
,
385 const struct gl_pixelstore_attrib
*unpack
,
388 struct pipe_resource
*pt
= NULL
;
389 const GLint bpp
= _mesa_bytes_per_pixel(format
, type
);
392 if ((unpack
->RowLength
!= 0 && unpack
->RowLength
!= width
) ||
393 unpack
->SkipPixels
!= 0 ||
394 unpack
->SkipRows
!= 0 ||
396 _mesa_is_bufferobj(unpack
->BufferObj
)) {
397 /* we don't allow non-default pixel unpacking values */
401 /* Search cache entries for a match */
402 for (i
= 0; i
< ARRAY_SIZE(st
->drawpix_cache
.entries
); i
++) {
403 struct drawpix_cache_entry
*entry
= &st
->drawpix_cache
.entries
[i
];
405 if (width
== entry
->width
&&
406 height
== entry
->height
&&
407 format
== entry
->format
&&
408 type
== entry
->type
&&
409 pixels
== entry
->user_pointer
&&
411 assert(entry
->texture
);
413 /* check if the pixel data is the same */
414 if (memcmp(pixels
, entry
->image
, width
* height
* bpp
) == 0) {
415 /* Success - found a cache match */
416 pipe_resource_reference(&pt
, entry
->texture
);
417 /* refcount of returned texture should be at least two here. One
418 * reference for the cache to hold on to, one for the caller (which
419 * it will release), and possibly more held by the driver.
421 assert(pt
->reference
.count
>= 2);
423 /* update the age of this entry */
424 entry
->age
= ++st
->drawpix_cache
.age
;
431 /* no cache match found */
437 * Find the oldest entry in the glDrawPixels cache. We'll replace this
438 * one when we need to store a new image.
440 static struct drawpix_cache_entry
*
441 find_oldest_drawpixels_cache_entry(struct st_context
*st
)
443 unsigned oldest_age
= ~0u, oldest_index
= ~0u;
446 /* Find entry with oldest (lowest) age */
447 for (i
= 0; i
< ARRAY_SIZE(st
->drawpix_cache
.entries
); i
++) {
448 const struct drawpix_cache_entry
*entry
= &st
->drawpix_cache
.entries
[i
];
449 if (entry
->age
< oldest_age
) {
450 oldest_age
= entry
->age
;
455 assert(oldest_index
!= ~0u);
457 return &st
->drawpix_cache
.entries
[oldest_index
];
462 * Try to save the given glDrawPixels image in the cache.
465 cache_drawpixels_image(struct st_context
*st
,
466 GLsizei width
, GLsizei height
,
467 GLenum format
, GLenum type
,
468 const struct gl_pixelstore_attrib
*unpack
,
470 struct pipe_resource
*pt
)
472 if ((unpack
->RowLength
== 0 || unpack
->RowLength
== width
) &&
473 unpack
->SkipPixels
== 0 &&
474 unpack
->SkipRows
== 0) {
475 const GLint bpp
= _mesa_bytes_per_pixel(format
, type
);
476 struct drawpix_cache_entry
*entry
=
477 find_oldest_drawpixels_cache_entry(st
);
479 entry
->width
= width
;
480 entry
->height
= height
;
481 entry
->format
= format
;
483 entry
->user_pointer
= pixels
;
485 entry
->image
= malloc(width
* height
* bpp
);
487 memcpy(entry
->image
, pixels
, width
* height
* bpp
);
488 pipe_resource_reference(&entry
->texture
, pt
);
489 entry
->age
= ++st
->drawpix_cache
.age
;
492 /* out of memory, free/disable cached texture */
495 pipe_resource_reference(&entry
->texture
, NULL
);
502 * Make texture containing an image for glDrawPixels image.
503 * If 'pixels' is NULL, leave the texture image data undefined.
505 static struct pipe_resource
*
506 make_texture(struct st_context
*st
,
507 GLsizei width
, GLsizei height
, GLenum format
, GLenum type
,
508 const struct gl_pixelstore_attrib
*unpack
,
511 struct gl_context
*ctx
= st
->ctx
;
512 struct pipe_context
*pipe
= st
->pipe
;
514 struct pipe_resource
*pt
= NULL
;
515 enum pipe_format pipeFormat
;
516 GLenum baseInternalFormat
;
518 #if USE_DRAWPIXELS_CACHE
519 pt
= search_drawpixels_cache(st
, width
, height
, format
, type
,
526 /* Choose a pixel format for the temp texture which will hold the
529 pipeFormat
= st_choose_matching_format(st
, PIPE_BIND_SAMPLER_VIEW
,
530 format
, type
, unpack
->SwapBytes
);
532 if (pipeFormat
== PIPE_FORMAT_NONE
) {
533 /* Use the generic approach. */
534 GLenum intFormat
= internal_format(ctx
, format
, type
);
536 pipeFormat
= st_choose_format(st
, intFormat
, format
, type
,
537 st
->internal_target
, 0,
538 PIPE_BIND_SAMPLER_VIEW
, FALSE
);
539 assert(pipeFormat
!= PIPE_FORMAT_NONE
);
542 mformat
= st_pipe_format_to_mesa_format(pipeFormat
);
543 baseInternalFormat
= _mesa_get_format_base_format(mformat
);
545 pixels
= _mesa_map_pbo_source(ctx
, unpack
, pixels
);
549 /* alloc temporary texture */
550 pt
= alloc_texture(st
, width
, height
, pipeFormat
, PIPE_BIND_SAMPLER_VIEW
);
552 _mesa_unmap_pbo_source(ctx
, unpack
);
557 struct pipe_transfer
*transfer
;
559 const GLbitfield imageTransferStateSave
= ctx
->_ImageTransferState
;
561 /* we'll do pixel transfer in a fragment shader */
562 ctx
->_ImageTransferState
= 0x0;
564 /* map texture transfer */
565 dest
= pipe_transfer_map(pipe
, pt
, 0, 0,
566 PIPE_TRANSFER_WRITE
, 0, 0,
567 width
, height
, &transfer
);
570 /* Put image into texture transfer.
571 * Note that the image is actually going to be upside down in
572 * the texture. We deal with that with texcoords.
574 if ((format
== GL_RGBA
|| format
== GL_BGRA
)
575 && type
== GL_UNSIGNED_BYTE
) {
576 /* Use a memcpy-based texstore to avoid software pixel swizzling.
577 * We'll do the necessary swizzling with the pipe_sampler_view to
578 * give much better performance.
579 * XXX in the future, expand this to accomodate more format and
582 _mesa_memcpy_texture(ctx
, 2,
583 mformat
, /* mesa_format */
584 transfer
->stride
, /* dstRowStride, bytes */
585 &dest
, /* destSlices */
586 width
, height
, 1, /* size */
587 format
, type
, /* src format/type */
588 pixels
, /* data source */
592 bool MAYBE_UNUSED success
;
593 success
= _mesa_texstore(ctx
, 2, /* dims */
594 baseInternalFormat
, /* baseInternalFormat */
595 mformat
, /* mesa_format */
596 transfer
->stride
, /* dstRowStride, bytes */
597 &dest
, /* destSlices */
598 width
, height
, 1, /* size */
599 format
, type
, /* src format/type */
600 pixels
, /* data source */
607 pipe_transfer_unmap(pipe
, transfer
);
610 ctx
->_ImageTransferState
= imageTransferStateSave
;
613 _mesa_unmap_pbo_source(ctx
, unpack
);
615 #if USE_DRAWPIXELS_CACHE
616 cache_drawpixels_image(st
, width
, height
, format
, type
, unpack
, pixels
, pt
);
624 draw_textured_quad(struct gl_context
*ctx
, GLint x
, GLint y
, GLfloat z
,
625 GLsizei width
, GLsizei height
,
626 GLfloat zoomX
, GLfloat zoomY
,
627 struct pipe_sampler_view
**sv
,
628 int num_sampler_view
,
631 struct st_fp_variant
*fpv
,
632 const GLfloat
*color
,
634 GLboolean write_depth
, GLboolean write_stencil
)
636 struct st_context
*st
= st_context(ctx
);
637 struct pipe_context
*pipe
= st
->pipe
;
638 struct cso_context
*cso
= st
->cso_context
;
639 const unsigned fb_width
= _mesa_geometric_width(ctx
->DrawBuffer
);
640 const unsigned fb_height
= _mesa_geometric_height(ctx
->DrawBuffer
);
641 GLfloat x0
, y0
, x1
, y1
;
642 GLsizei MAYBE_UNUSED maxSize
;
643 boolean normalized
= sv
[0]->texture
->target
== PIPE_TEXTURE_2D
;
644 unsigned cso_state_mask
;
646 assert(sv
[0]->texture
->target
== st
->internal_target
);
649 /* XXX if DrawPixels image is larger than max texture size, break
652 maxSize
= 1 << (pipe
->screen
->get_param(pipe
->screen
,
653 PIPE_CAP_MAX_TEXTURE_2D_LEVELS
) - 1);
654 assert(width
<= maxSize
);
655 assert(height
<= maxSize
);
657 cso_state_mask
= (CSO_BIT_RASTERIZER
|
659 CSO_BIT_FRAGMENT_SAMPLERS
|
660 CSO_BIT_FRAGMENT_SAMPLER_VIEWS
|
661 CSO_BIT_STREAM_OUTPUTS
|
662 CSO_BIT_VERTEX_ELEMENTS
|
663 CSO_BIT_AUX_VERTEX_BUFFER_SLOT
|
664 CSO_BITS_ALL_SHADERS
);
666 cso_state_mask
|= (CSO_BIT_DEPTH_STENCIL_ALPHA
|
669 cso_save_state(cso
, cso_state_mask
);
671 /* rasterizer state: just scissor */
673 struct pipe_rasterizer_state rasterizer
;
674 memset(&rasterizer
, 0, sizeof(rasterizer
));
675 rasterizer
.clamp_fragment_color
= !st
->clamp_frag_color_in_shader
&&
676 ctx
->Color
._ClampFragmentColor
;
677 rasterizer
.half_pixel_center
= 1;
678 rasterizer
.bottom_edge_rule
= 1;
679 rasterizer
.depth_clip
= !ctx
->Transform
.DepthClamp
;
680 rasterizer
.scissor
= ctx
->Scissor
.EnableFlags
;
681 cso_set_rasterizer(cso
, &rasterizer
);
685 /* Stencil writing bypasses the normal fragment pipeline to
686 * disable color writing and set stencil test to always pass.
688 struct pipe_depth_stencil_alpha_state dsa
;
689 struct pipe_blend_state blend
;
692 memset(&dsa
, 0, sizeof(dsa
));
693 dsa
.stencil
[0].enabled
= 1;
694 dsa
.stencil
[0].func
= PIPE_FUNC_ALWAYS
;
695 dsa
.stencil
[0].writemask
= ctx
->Stencil
.WriteMask
[0] & 0xff;
696 dsa
.stencil
[0].zpass_op
= PIPE_STENCIL_OP_REPLACE
;
698 /* writing depth+stencil: depth test always passes */
699 dsa
.depth
.enabled
= 1;
700 dsa
.depth
.writemask
= ctx
->Depth
.Mask
;
701 dsa
.depth
.func
= PIPE_FUNC_ALWAYS
;
703 cso_set_depth_stencil_alpha(cso
, &dsa
);
705 /* blend (colormask) */
706 memset(&blend
, 0, sizeof(blend
));
707 cso_set_blend(cso
, &blend
);
710 /* fragment shader state: TEX lookup program */
711 cso_set_fragment_shader_handle(cso
, driver_fp
);
713 /* vertex shader state: position + texcoord pass-through */
714 cso_set_vertex_shader_handle(cso
, driver_vp
);
716 /* disable other shaders */
717 cso_set_tessctrl_shader_handle(cso
, NULL
);
718 cso_set_tesseval_shader_handle(cso
, NULL
);
719 cso_set_geometry_shader_handle(cso
, NULL
);
721 /* user samplers, plus the drawpix samplers */
723 struct pipe_sampler_state sampler
;
725 memset(&sampler
, 0, sizeof(sampler
));
726 sampler
.wrap_s
= PIPE_TEX_WRAP_CLAMP
;
727 sampler
.wrap_t
= PIPE_TEX_WRAP_CLAMP
;
728 sampler
.wrap_r
= PIPE_TEX_WRAP_CLAMP
;
729 sampler
.min_img_filter
= PIPE_TEX_FILTER_NEAREST
;
730 sampler
.min_mip_filter
= PIPE_TEX_MIPFILTER_NONE
;
731 sampler
.mag_img_filter
= PIPE_TEX_FILTER_NEAREST
;
732 sampler
.normalized_coords
= normalized
;
735 /* drawing a color image */
736 const struct pipe_sampler_state
*samplers
[PIPE_MAX_SAMPLERS
];
737 uint num
= MAX3(fpv
->drawpix_sampler
+ 1,
738 fpv
->pixelmap_sampler
+ 1,
739 st
->state
.num_frag_samplers
);
742 for (i
= 0; i
< st
->state
.num_frag_samplers
; i
++)
743 samplers
[i
] = &st
->state
.frag_samplers
[i
];
745 samplers
[fpv
->drawpix_sampler
] = &sampler
;
747 samplers
[fpv
->pixelmap_sampler
] = &sampler
;
749 cso_set_samplers(cso
, PIPE_SHADER_FRAGMENT
, num
, samplers
);
751 /* drawing a depth/stencil image */
752 const struct pipe_sampler_state
*samplers
[2] = {&sampler
, &sampler
};
754 cso_set_samplers(cso
, PIPE_SHADER_FRAGMENT
, num_sampler_view
, samplers
);
758 /* user textures, plus the drawpix textures */
760 /* drawing a color image */
761 struct pipe_sampler_view
*sampler_views
[PIPE_MAX_SAMPLERS
];
762 uint num
= MAX3(fpv
->drawpix_sampler
+ 1,
763 fpv
->pixelmap_sampler
+ 1,
764 st
->state
.num_sampler_views
[PIPE_SHADER_FRAGMENT
]);
766 memcpy(sampler_views
, st
->state
.frag_sampler_views
,
767 sizeof(sampler_views
));
769 sampler_views
[fpv
->drawpix_sampler
] = sv
[0];
771 sampler_views
[fpv
->pixelmap_sampler
] = sv
[1];
772 cso_set_sampler_views(cso
, PIPE_SHADER_FRAGMENT
, num
, sampler_views
);
774 /* drawing a depth/stencil image */
775 cso_set_sampler_views(cso
, PIPE_SHADER_FRAGMENT
, num_sampler_view
, sv
);
778 /* viewport state: viewport matching window dims */
779 cso_set_viewport_dims(cso
, fb_width
, fb_height
, TRUE
);
781 cso_set_vertex_elements(cso
, 3, st
->util_velems
);
782 cso_set_stream_outputs(cso
, 0, NULL
, NULL
);
784 /* Compute Gallium window coords (y=0=top) with pixel zoom.
785 * Recall that these coords are transformed by the current
786 * vertex shader and viewport transformation.
788 if (st_fb_orientation(ctx
->DrawBuffer
) == Y_0_BOTTOM
) {
789 y
= fb_height
- (int) (y
+ height
* ctx
->Pixel
.ZoomY
);
790 invertTex
= !invertTex
;
794 x1
= x
+ width
* ctx
->Pixel
.ZoomX
;
796 y1
= y
+ height
* ctx
->Pixel
.ZoomY
;
798 /* convert Z from [0,1] to [-1,-1] to match viewport Z scale/bias */
802 const float clip_x0
= x0
/ (float) fb_width
* 2.0f
- 1.0f
;
803 const float clip_y0
= y0
/ (float) fb_height
* 2.0f
- 1.0f
;
804 const float clip_x1
= x1
/ (float) fb_width
* 2.0f
- 1.0f
;
805 const float clip_y1
= y1
/ (float) fb_height
* 2.0f
- 1.0f
;
806 const float maxXcoord
= normalized
?
807 ((float) width
/ sv
[0]->texture
->width0
) : (float) width
;
808 const float maxYcoord
= normalized
809 ? ((float) height
/ sv
[0]->texture
->height0
) : (float) height
;
810 const float sLeft
= 0.0f
, sRight
= maxXcoord
;
811 const float tTop
= invertTex
? maxYcoord
: 0.0f
;
812 const float tBot
= invertTex
? 0.0f
: maxYcoord
;
814 if (!st_draw_quad(st
, clip_x0
, clip_y0
, clip_x1
, clip_y1
, z
,
815 sLeft
, tBot
, sRight
, tTop
, color
, 0)) {
816 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glDrawPixels");
821 cso_restore_state(cso
);
826 * Software fallback to do glDrawPixels(GL_STENCIL_INDEX) when we
827 * can't use a fragment shader to write stencil values.
830 draw_stencil_pixels(struct gl_context
*ctx
, GLint x
, GLint y
,
831 GLsizei width
, GLsizei height
, GLenum format
, GLenum type
,
832 const struct gl_pixelstore_attrib
*unpack
,
835 struct st_context
*st
= st_context(ctx
);
836 struct pipe_context
*pipe
= st
->pipe
;
837 struct st_renderbuffer
*strb
;
838 enum pipe_transfer_usage usage
;
839 struct pipe_transfer
*pt
;
840 const GLboolean zoom
= ctx
->Pixel
.ZoomX
!= 1.0 || ctx
->Pixel
.ZoomY
!= 1.0;
842 struct gl_pixelstore_attrib clippedUnpack
= *unpack
;
847 if (!_mesa_clip_drawpixels(ctx
, &x
, &y
, &width
, &height
,
849 /* totally clipped */
854 strb
= st_renderbuffer(ctx
->DrawBuffer
->
855 Attachment
[BUFFER_STENCIL
].Renderbuffer
);
857 if (st_fb_orientation(ctx
->DrawBuffer
) == Y_0_TOP
) {
858 y
= ctx
->DrawBuffer
->Height
- y
- height
;
861 if (format
== GL_STENCIL_INDEX
&&
862 _mesa_is_format_packed_depth_stencil(strb
->Base
.Format
)) {
863 /* writing stencil to a combined depth+stencil buffer */
864 usage
= PIPE_TRANSFER_READ_WRITE
;
867 usage
= PIPE_TRANSFER_WRITE
;
870 stmap
= pipe_transfer_map(pipe
, strb
->texture
,
871 strb
->surface
->u
.tex
.level
,
872 strb
->surface
->u
.tex
.first_layer
,
876 pixels
= _mesa_map_pbo_source(ctx
, &clippedUnpack
, pixels
);
879 sValues
= malloc(width
* sizeof(GLubyte
));
880 zValues
= malloc(width
* sizeof(GLuint
));
882 if (sValues
&& zValues
) {
884 for (row
= 0; row
< height
; row
++) {
885 GLfloat
*zValuesFloat
= (GLfloat
*)zValues
;
886 GLenum destType
= GL_UNSIGNED_BYTE
;
887 const void *source
= _mesa_image_address2d(&clippedUnpack
, pixels
,
891 _mesa_unpack_stencil_span(ctx
, width
, destType
, sValues
,
892 type
, source
, &clippedUnpack
,
893 ctx
->_ImageTransferState
);
895 if (format
== GL_DEPTH_STENCIL
) {
897 pt
->resource
->format
== PIPE_FORMAT_Z32_FLOAT_S8X24_UINT
?
898 GL_FLOAT
: GL_UNSIGNED_INT
;
900 _mesa_unpack_depth_span(ctx
, width
, ztype
, zValues
,
901 (1 << 24) - 1, type
, source
,
906 _mesa_problem(ctx
, "Gallium glDrawPixels(GL_STENCIL) with "
907 "zoom not complete");
913 if (st_fb_orientation(ctx
->DrawBuffer
) == Y_0_TOP
) {
914 spanY
= height
- row
- 1;
920 /* now pack the stencil (and Z) values in the dest format */
921 switch (pt
->resource
->format
) {
922 case PIPE_FORMAT_S8_UINT
:
924 ubyte
*dest
= stmap
+ spanY
* pt
->stride
;
925 assert(usage
== PIPE_TRANSFER_WRITE
);
926 memcpy(dest
, sValues
, width
);
929 case PIPE_FORMAT_Z24_UNORM_S8_UINT
:
930 if (format
== GL_DEPTH_STENCIL
) {
931 uint
*dest
= (uint
*) (stmap
+ spanY
* pt
->stride
);
933 assert(usage
== PIPE_TRANSFER_WRITE
);
934 for (k
= 0; k
< width
; k
++) {
935 dest
[k
] = zValues
[k
] | (sValues
[k
] << 24);
939 uint
*dest
= (uint
*) (stmap
+ spanY
* pt
->stride
);
941 assert(usage
== PIPE_TRANSFER_READ_WRITE
);
942 for (k
= 0; k
< width
; k
++) {
943 dest
[k
] = (dest
[k
] & 0xffffff) | (sValues
[k
] << 24);
947 case PIPE_FORMAT_S8_UINT_Z24_UNORM
:
948 if (format
== GL_DEPTH_STENCIL
) {
949 uint
*dest
= (uint
*) (stmap
+ spanY
* pt
->stride
);
951 assert(usage
== PIPE_TRANSFER_WRITE
);
952 for (k
= 0; k
< width
; k
++) {
953 dest
[k
] = (zValues
[k
] << 8) | (sValues
[k
] & 0xff);
957 uint
*dest
= (uint
*) (stmap
+ spanY
* pt
->stride
);
959 assert(usage
== PIPE_TRANSFER_READ_WRITE
);
960 for (k
= 0; k
< width
; k
++) {
961 dest
[k
] = (dest
[k
] & 0xffffff00) | (sValues
[k
] & 0xff);
965 case PIPE_FORMAT_Z32_FLOAT_S8X24_UINT
:
966 if (format
== GL_DEPTH_STENCIL
) {
967 uint
*dest
= (uint
*) (stmap
+ spanY
* pt
->stride
);
968 GLfloat
*destf
= (GLfloat
*)dest
;
970 assert(usage
== PIPE_TRANSFER_WRITE
);
971 for (k
= 0; k
< width
; k
++) {
972 destf
[k
*2] = zValuesFloat
[k
];
973 dest
[k
*2+1] = sValues
[k
] & 0xff;
977 uint
*dest
= (uint
*) (stmap
+ spanY
* pt
->stride
);
979 assert(usage
== PIPE_TRANSFER_READ_WRITE
);
980 for (k
= 0; k
< width
; k
++) {
981 dest
[k
*2+1] = sValues
[k
] & 0xff;
992 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glDrawPixels()");
998 _mesa_unmap_pbo_source(ctx
, &clippedUnpack
);
1000 /* unmap the stencil buffer */
1001 pipe_transfer_unmap(pipe
, pt
);
1006 * Get fragment program variant for a glDrawPixels or glCopyPixels
1007 * command for RGBA data.
1009 static struct st_fp_variant
*
1010 get_color_fp_variant(struct st_context
*st
)
1012 struct gl_context
*ctx
= st
->ctx
;
1013 struct st_fp_variant_key key
;
1014 struct st_fp_variant
*fpv
;
1016 memset(&key
, 0, sizeof(key
));
1018 key
.st
= st
->has_shareable_shaders
? NULL
: st
;
1020 key
.scaleAndBias
= (ctx
->Pixel
.RedBias
!= 0.0 ||
1021 ctx
->Pixel
.RedScale
!= 1.0 ||
1022 ctx
->Pixel
.GreenBias
!= 0.0 ||
1023 ctx
->Pixel
.GreenScale
!= 1.0 ||
1024 ctx
->Pixel
.BlueBias
!= 0.0 ||
1025 ctx
->Pixel
.BlueScale
!= 1.0 ||
1026 ctx
->Pixel
.AlphaBias
!= 0.0 ||
1027 ctx
->Pixel
.AlphaScale
!= 1.0);
1028 key
.pixelMaps
= ctx
->Pixel
.MapColorFlag
;
1029 key
.clamp_color
= st
->clamp_frag_color_in_shader
&&
1030 ctx
->Color
._ClampFragmentColor
;
1032 fpv
= st_get_fp_variant(st
, st
->fp
, &key
);
1039 * Clamp glDrawPixels width and height to the maximum texture size.
1042 clamp_size(struct pipe_context
*pipe
, GLsizei
*width
, GLsizei
*height
,
1043 struct gl_pixelstore_attrib
*unpack
)
1046 1 << (pipe
->screen
->get_param(pipe
->screen
,
1047 PIPE_CAP_MAX_TEXTURE_2D_LEVELS
) - 1);
1049 if (*width
> maxSize
) {
1050 if (unpack
->RowLength
== 0)
1051 unpack
->RowLength
= *width
;
1054 if (*height
> maxSize
) {
1061 * Search the array of 4 swizzle components for the named component and return
1065 search_swizzle(const unsigned char swizzle
[4], unsigned component
)
1068 for (i
= 0; i
< 4; i
++) {
1069 if (swizzle
[i
] == component
)
1072 assert(!"search_swizzle() failed");
1078 * Set the sampler view's swizzle terms. This is used to handle RGBA
1079 * swizzling when the incoming image format isn't an exact match for
1080 * the actual texture format. For example, if we have glDrawPixels(
1081 * GL_RGBA, GL_UNSIGNED_BYTE) and we chose the texture format
1082 * PIPE_FORMAT_B8G8R8A8 then we can do use the sampler view swizzle to
1083 * avoid swizzling all the pixels in software in the texstore code.
1086 setup_sampler_swizzle(struct pipe_sampler_view
*sv
, GLenum format
, GLenum type
)
1088 if ((format
== GL_RGBA
|| format
== GL_BGRA
) && type
== GL_UNSIGNED_BYTE
) {
1089 const struct util_format_description
*desc
=
1090 util_format_description(sv
->texture
->format
);
1091 unsigned c0
, c1
, c2
, c3
;
1093 /* Every gallium driver supports at least one 32-bit packed RGBA format.
1094 * We must have chosen one for (GL_RGBA, GL_UNSIGNED_BYTE).
1096 assert(desc
->block
.bits
== 32);
1098 /* invert the format's swizzle to setup the sampler's swizzle */
1099 if (format
== GL_RGBA
) {
1100 c0
= PIPE_SWIZZLE_X
;
1101 c1
= PIPE_SWIZZLE_Y
;
1102 c2
= PIPE_SWIZZLE_Z
;
1103 c3
= PIPE_SWIZZLE_W
;
1106 assert(format
== GL_BGRA
);
1107 c0
= PIPE_SWIZZLE_Z
;
1108 c1
= PIPE_SWIZZLE_Y
;
1109 c2
= PIPE_SWIZZLE_X
;
1110 c3
= PIPE_SWIZZLE_W
;
1112 sv
->swizzle_r
= search_swizzle(desc
->swizzle
, c0
);
1113 sv
->swizzle_g
= search_swizzle(desc
->swizzle
, c1
);
1114 sv
->swizzle_b
= search_swizzle(desc
->swizzle
, c2
);
1115 sv
->swizzle_a
= search_swizzle(desc
->swizzle
, c3
);
1118 /* use the default sampler swizzle */
1124 * Called via ctx->Driver.DrawPixels()
1127 st_DrawPixels(struct gl_context
*ctx
, GLint x
, GLint y
,
1128 GLsizei width
, GLsizei height
,
1129 GLenum format
, GLenum type
,
1130 const struct gl_pixelstore_attrib
*unpack
, const void *pixels
)
1132 void *driver_vp
, *driver_fp
;
1133 struct st_context
*st
= st_context(ctx
);
1134 struct pipe_context
*pipe
= st
->pipe
;
1135 GLboolean write_stencil
= GL_FALSE
, write_depth
= GL_FALSE
;
1136 struct pipe_sampler_view
*sv
[2] = { NULL
};
1137 int num_sampler_view
= 1;
1138 struct gl_pixelstore_attrib clippedUnpack
;
1139 struct st_fp_variant
*fpv
= NULL
;
1140 struct pipe_resource
*pt
;
1142 /* Mesa state should be up to date by now */
1143 assert(ctx
->NewState
== 0x0);
1145 _mesa_update_draw_buffer_bounds(ctx
, ctx
->DrawBuffer
);
1147 st_flush_bitmap_cache(st
);
1148 st_invalidate_readpix_cache(st
);
1150 st_validate_state(st
, ST_PIPELINE_RENDER
);
1152 /* Limit the size of the glDrawPixels to the max texture size.
1153 * Strictly speaking, that's not correct but since we don't handle
1154 * larger images yet, this is better than crashing.
1156 clippedUnpack
= *unpack
;
1157 unpack
= &clippedUnpack
;
1158 clamp_size(st
->pipe
, &width
, &height
, &clippedUnpack
);
1160 if (format
== GL_DEPTH_STENCIL
)
1161 write_stencil
= write_depth
= GL_TRUE
;
1162 else if (format
== GL_STENCIL_INDEX
)
1163 write_stencil
= GL_TRUE
;
1164 else if (format
== GL_DEPTH_COMPONENT
)
1165 write_depth
= GL_TRUE
;
1167 if (write_stencil
&&
1168 !pipe
->screen
->get_param(pipe
->screen
, PIPE_CAP_SHADER_STENCIL_EXPORT
)) {
1169 /* software fallback */
1170 draw_stencil_pixels(ctx
, x
, y
, width
, height
, format
, type
,
1176 * Get vertex/fragment shaders
1178 if (write_depth
|| write_stencil
) {
1179 driver_fp
= get_drawpix_z_stencil_program(st
, write_depth
,
1181 driver_vp
= make_passthrough_vertex_shader(st
, GL_TRUE
);
1184 fpv
= get_color_fp_variant(st
);
1186 driver_fp
= fpv
->driver_shader
;
1187 driver_vp
= make_passthrough_vertex_shader(st
, GL_FALSE
);
1189 if (ctx
->Pixel
.MapColorFlag
) {
1190 pipe_sampler_view_reference(&sv
[1],
1191 st
->pixel_xfer
.pixelmap_sampler_view
);
1195 /* compiling a new fragment shader variant added new state constants
1196 * into the constant buffer, we need to update them
1198 st_upload_constants(st
, &st
->fp
->Base
);
1201 /* Put glDrawPixels image into a texture */
1202 pt
= make_texture(st
, width
, height
, format
, type
, unpack
, pixels
);
1204 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glDrawPixels");
1208 /* create sampler view for the image */
1209 sv
[0] = st_create_texture_sampler_view(st
->pipe
, pt
);
1211 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glDrawPixels");
1212 pipe_resource_reference(&pt
, NULL
);
1216 /* Set up the sampler view's swizzle */
1217 setup_sampler_swizzle(sv
[0], format
, type
);
1219 /* Create a second sampler view to read stencil. The stencil is
1220 * written using the shader stencil export functionality.
1222 if (write_stencil
) {
1223 enum pipe_format stencil_format
=
1224 util_format_stencil_only(pt
->format
);
1225 /* we should not be doing pixel map/transfer (see above) */
1226 assert(num_sampler_view
== 1);
1227 sv
[1] = st_create_texture_sampler_view_format(st
->pipe
, pt
,
1230 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glDrawPixels");
1231 pipe_resource_reference(&pt
, NULL
);
1232 pipe_sampler_view_reference(&sv
[0], NULL
);
1238 draw_textured_quad(ctx
, x
, y
, ctx
->Current
.RasterPos
[2],
1240 ctx
->Pixel
.ZoomX
, ctx
->Pixel
.ZoomY
,
1245 ctx
->Current
.RasterColor
,
1246 GL_FALSE
, write_depth
, write_stencil
);
1247 pipe_sampler_view_reference(&sv
[0], NULL
);
1248 if (num_sampler_view
> 1)
1249 pipe_sampler_view_reference(&sv
[1], NULL
);
1251 /* free the texture (but may persist in the cache) */
1252 pipe_resource_reference(&pt
, NULL
);
1258 * Software fallback for glCopyPixels(GL_STENCIL).
1261 copy_stencil_pixels(struct gl_context
*ctx
, GLint srcx
, GLint srcy
,
1262 GLsizei width
, GLsizei height
,
1263 GLint dstx
, GLint dsty
)
1265 struct st_renderbuffer
*rbDraw
;
1266 struct pipe_context
*pipe
= st_context(ctx
)->pipe
;
1267 enum pipe_transfer_usage usage
;
1268 struct pipe_transfer
*ptDraw
;
1273 buffer
= malloc(width
* height
* sizeof(ubyte
));
1275 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glCopyPixels(stencil)");
1279 /* Get the dest renderbuffer */
1280 rbDraw
= st_renderbuffer(ctx
->DrawBuffer
->
1281 Attachment
[BUFFER_STENCIL
].Renderbuffer
);
1283 /* this will do stencil pixel transfer ops */
1284 _mesa_readpixels(ctx
, srcx
, srcy
, width
, height
,
1285 GL_STENCIL_INDEX
, GL_UNSIGNED_BYTE
,
1286 &ctx
->DefaultPacking
, buffer
);
1289 /* debug code: dump stencil values */
1291 for (row
= 0; row
< height
; row
++) {
1292 printf("%3d: ", row
);
1293 for (col
= 0; col
< width
; col
++) {
1294 printf("%02x ", buffer
[col
+ row
* width
]);
1300 if (_mesa_is_format_packed_depth_stencil(rbDraw
->Base
.Format
))
1301 usage
= PIPE_TRANSFER_READ_WRITE
;
1303 usage
= PIPE_TRANSFER_WRITE
;
1305 if (st_fb_orientation(ctx
->DrawBuffer
) == Y_0_TOP
) {
1306 dsty
= rbDraw
->Base
.Height
- dsty
- height
;
1309 assert(util_format_get_blockwidth(rbDraw
->texture
->format
) == 1);
1310 assert(util_format_get_blockheight(rbDraw
->texture
->format
) == 1);
1312 /* map the stencil buffer */
1313 drawMap
= pipe_transfer_map(pipe
,
1315 rbDraw
->surface
->u
.tex
.level
,
1316 rbDraw
->surface
->u
.tex
.first_layer
,
1318 width
, height
, &ptDraw
);
1321 /* XXX PixelZoom not handled yet */
1322 for (i
= 0; i
< height
; i
++) {
1329 if (st_fb_orientation(ctx
->DrawBuffer
) == Y_0_TOP
) {
1333 dst
= drawMap
+ y
* ptDraw
->stride
;
1334 src
= buffer
+ i
* width
;
1336 _mesa_pack_ubyte_stencil_row(rbDraw
->Base
.Format
, width
, src
, dst
);
1341 /* unmap the stencil buffer */
1342 pipe_transfer_unmap(pipe
, ptDraw
);
1347 * Return renderbuffer to use for reading color pixels for glCopyPixels
1349 static struct st_renderbuffer
*
1350 st_get_color_read_renderbuffer(struct gl_context
*ctx
)
1352 struct gl_framebuffer
*fb
= ctx
->ReadBuffer
;
1353 struct st_renderbuffer
*strb
=
1354 st_renderbuffer(fb
->_ColorReadBuffer
);
1361 * Try to do a glCopyPixels for simple cases with a blit by calling
1364 * We can do this when we're copying color pixels (depth/stencil
1365 * eventually) with no pixel zoom, no pixel transfer ops, no
1366 * per-fragment ops, and the src/dest regions don't overlap.
1369 blit_copy_pixels(struct gl_context
*ctx
, GLint srcx
, GLint srcy
,
1370 GLsizei width
, GLsizei height
,
1371 GLint dstx
, GLint dsty
, GLenum type
)
1373 struct st_context
*st
= st_context(ctx
);
1374 struct pipe_context
*pipe
= st
->pipe
;
1375 struct pipe_screen
*screen
= pipe
->screen
;
1376 struct gl_pixelstore_attrib pack
, unpack
;
1377 GLint readX
, readY
, readW
, readH
, drawX
, drawY
, drawW
, drawH
;
1379 if (type
== GL_COLOR
&&
1380 ctx
->Pixel
.ZoomX
== 1.0 &&
1381 ctx
->Pixel
.ZoomY
== 1.0 &&
1382 ctx
->_ImageTransferState
== 0x0 &&
1383 !ctx
->Color
.BlendEnabled
&&
1384 !ctx
->Color
.AlphaEnabled
&&
1385 (!ctx
->Color
.ColorLogicOpEnabled
|| ctx
->Color
.LogicOp
== GL_COPY
) &&
1387 !ctx
->Fog
.Enabled
&&
1388 !ctx
->Stencil
.Enabled
&&
1389 !ctx
->FragmentProgram
.Enabled
&&
1390 !ctx
->VertexProgram
.Enabled
&&
1391 !ctx
->_Shader
->CurrentProgram
[MESA_SHADER_FRAGMENT
] &&
1392 !_mesa_ati_fragment_shader_enabled(ctx
) &&
1393 ctx
->DrawBuffer
->_NumColorDrawBuffers
== 1 &&
1394 !ctx
->Query
.CondRenderQuery
&&
1395 !ctx
->Query
.CurrentOcclusionObject
) {
1396 struct st_renderbuffer
*rbRead
, *rbDraw
;
1399 * Clip the read region against the src buffer bounds.
1400 * We'll still allocate a temporary buffer/texture for the original
1401 * src region size but we'll only read the region which is on-screen.
1402 * This may mean that we draw garbage pixels into the dest region, but
1409 pack
= ctx
->DefaultPacking
;
1410 if (!_mesa_clip_readpixels(ctx
, &readX
, &readY
, &readW
, &readH
, &pack
))
1411 return GL_TRUE
; /* all done */
1413 /* clip against dest buffer bounds and scissor box */
1414 drawX
= dstx
+ pack
.SkipPixels
;
1415 drawY
= dsty
+ pack
.SkipRows
;
1417 if (!_mesa_clip_drawpixels(ctx
, &drawX
, &drawY
, &readW
, &readH
, &unpack
))
1418 return GL_TRUE
; /* all done */
1420 readX
= readX
- pack
.SkipPixels
+ unpack
.SkipPixels
;
1421 readY
= readY
- pack
.SkipRows
+ unpack
.SkipRows
;
1426 rbRead
= st_get_color_read_renderbuffer(ctx
);
1427 rbDraw
= st_renderbuffer(ctx
->DrawBuffer
->_ColorDrawBuffers
[0]);
1429 /* Flip src/dst position depending on the orientation of buffers. */
1430 if (st_fb_orientation(ctx
->ReadBuffer
) == Y_0_TOP
) {
1431 readY
= rbRead
->Base
.Height
- readY
;
1435 if (st_fb_orientation(ctx
->DrawBuffer
) == Y_0_TOP
) {
1436 /* We can't flip the destination for pipe->blit, so we only adjust
1437 * its position and flip the source.
1439 drawY
= rbDraw
->Base
.Height
- drawY
- drawH
;
1444 if (rbRead
!= rbDraw
||
1445 !_mesa_regions_overlap(readX
, readY
, readX
+ readW
, readY
+ readH
,
1446 drawX
, drawY
, drawX
+ drawW
, drawY
+ drawH
)) {
1447 struct pipe_blit_info blit
;
1449 memset(&blit
, 0, sizeof(blit
));
1450 blit
.src
.resource
= rbRead
->texture
;
1451 blit
.src
.level
= rbRead
->surface
->u
.tex
.level
;
1452 blit
.src
.format
= rbRead
->texture
->format
;
1453 blit
.src
.box
.x
= readX
;
1454 blit
.src
.box
.y
= readY
;
1455 blit
.src
.box
.z
= rbRead
->surface
->u
.tex
.first_layer
;
1456 blit
.src
.box
.width
= readW
;
1457 blit
.src
.box
.height
= readH
;
1458 blit
.src
.box
.depth
= 1;
1459 blit
.dst
.resource
= rbDraw
->texture
;
1460 blit
.dst
.level
= rbDraw
->surface
->u
.tex
.level
;
1461 blit
.dst
.format
= rbDraw
->texture
->format
;
1462 blit
.dst
.box
.x
= drawX
;
1463 blit
.dst
.box
.y
= drawY
;
1464 blit
.dst
.box
.z
= rbDraw
->surface
->u
.tex
.first_layer
;
1465 blit
.dst
.box
.width
= drawW
;
1466 blit
.dst
.box
.height
= drawH
;
1467 blit
.dst
.box
.depth
= 1;
1468 blit
.mask
= PIPE_MASK_RGBA
;
1469 blit
.filter
= PIPE_TEX_FILTER_NEAREST
;
1471 if (ctx
->DrawBuffer
!= ctx
->WinSysDrawBuffer
)
1472 st_window_rectangles_to_blit(ctx
, &blit
);
1474 if (screen
->is_format_supported(screen
, blit
.src
.format
,
1475 blit
.src
.resource
->target
,
1476 blit
.src
.resource
->nr_samples
,
1477 PIPE_BIND_SAMPLER_VIEW
) &&
1478 screen
->is_format_supported(screen
, blit
.dst
.format
,
1479 blit
.dst
.resource
->target
,
1480 blit
.dst
.resource
->nr_samples
,
1481 PIPE_BIND_RENDER_TARGET
)) {
1482 pipe
->blit(pipe
, &blit
);
1493 st_CopyPixels(struct gl_context
*ctx
, GLint srcx
, GLint srcy
,
1494 GLsizei width
, GLsizei height
,
1495 GLint dstx
, GLint dsty
, GLenum type
)
1497 struct st_context
*st
= st_context(ctx
);
1498 struct pipe_context
*pipe
= st
->pipe
;
1499 struct pipe_screen
*screen
= pipe
->screen
;
1500 struct st_renderbuffer
*rbRead
;
1501 void *driver_vp
, *driver_fp
;
1502 struct pipe_resource
*pt
;
1503 struct pipe_sampler_view
*sv
[2] = { NULL
};
1504 struct st_fp_variant
*fpv
= NULL
;
1505 int num_sampler_view
= 1;
1506 enum pipe_format srcFormat
;
1508 GLboolean invertTex
= GL_FALSE
;
1509 GLint readX
, readY
, readW
, readH
;
1510 struct gl_pixelstore_attrib pack
= ctx
->DefaultPacking
;
1512 _mesa_update_draw_buffer_bounds(ctx
, ctx
->DrawBuffer
);
1514 st_flush_bitmap_cache(st
);
1515 st_invalidate_readpix_cache(st
);
1517 st_validate_state(st
, ST_PIPELINE_RENDER
);
1519 if (type
== GL_DEPTH_STENCIL
) {
1520 /* XXX make this more efficient */
1521 st_CopyPixels(ctx
, srcx
, srcy
, width
, height
, dstx
, dsty
, GL_STENCIL
);
1522 st_CopyPixels(ctx
, srcx
, srcy
, width
, height
, dstx
, dsty
, GL_DEPTH
);
1526 if (type
== GL_STENCIL
) {
1527 /* can't use texturing to do stencil */
1528 copy_stencil_pixels(ctx
, srcx
, srcy
, width
, height
, dstx
, dsty
);
1532 if (blit_copy_pixels(ctx
, srcx
, srcy
, width
, height
, dstx
, dsty
, type
))
1536 * The subsequent code implements glCopyPixels by copying the source
1537 * pixels into a temporary texture that's then applied to a textured quad.
1538 * When we draw the textured quad, all the usual per-fragment operations
1544 * Get vertex/fragment shaders
1546 if (type
== GL_COLOR
) {
1547 fpv
= get_color_fp_variant(st
);
1549 rbRead
= st_get_color_read_renderbuffer(ctx
);
1551 driver_fp
= fpv
->driver_shader
;
1552 driver_vp
= make_passthrough_vertex_shader(st
, GL_FALSE
);
1554 if (ctx
->Pixel
.MapColorFlag
) {
1555 pipe_sampler_view_reference(&sv
[1],
1556 st
->pixel_xfer
.pixelmap_sampler_view
);
1560 /* compiling a new fragment shader variant added new state constants
1561 * into the constant buffer, we need to update them
1563 st_upload_constants(st
, &st
->fp
->Base
);
1566 assert(type
== GL_DEPTH
);
1567 rbRead
= st_renderbuffer(ctx
->ReadBuffer
->
1568 Attachment
[BUFFER_DEPTH
].Renderbuffer
);
1570 driver_fp
= get_drawpix_z_stencil_program(st
, GL_TRUE
, GL_FALSE
);
1571 driver_vp
= make_passthrough_vertex_shader(st
, GL_TRUE
);
1574 /* Choose the format for the temporary texture. */
1575 srcFormat
= rbRead
->texture
->format
;
1576 srcBind
= PIPE_BIND_SAMPLER_VIEW
|
1577 (type
== GL_COLOR
? PIPE_BIND_RENDER_TARGET
: PIPE_BIND_DEPTH_STENCIL
);
1579 if (!screen
->is_format_supported(screen
, srcFormat
, st
->internal_target
, 0,
1581 /* srcFormat is non-renderable. Find a compatible renderable format. */
1582 if (type
== GL_DEPTH
) {
1583 srcFormat
= st_choose_format(st
, GL_DEPTH_COMPONENT
, GL_NONE
,
1584 GL_NONE
, st
->internal_target
, 0,
1588 assert(type
== GL_COLOR
);
1590 if (util_format_is_float(srcFormat
)) {
1591 srcFormat
= st_choose_format(st
, GL_RGBA32F
, GL_NONE
,
1592 GL_NONE
, st
->internal_target
, 0,
1595 else if (util_format_is_pure_sint(srcFormat
)) {
1596 srcFormat
= st_choose_format(st
, GL_RGBA32I
, GL_NONE
,
1597 GL_NONE
, st
->internal_target
, 0,
1600 else if (util_format_is_pure_uint(srcFormat
)) {
1601 srcFormat
= st_choose_format(st
, GL_RGBA32UI
, GL_NONE
,
1602 GL_NONE
, st
->internal_target
, 0,
1605 else if (util_format_is_snorm(srcFormat
)) {
1606 srcFormat
= st_choose_format(st
, GL_RGBA16_SNORM
, GL_NONE
,
1607 GL_NONE
, st
->internal_target
, 0,
1611 srcFormat
= st_choose_format(st
, GL_RGBA
, GL_NONE
,
1612 GL_NONE
, st
->internal_target
, 0,
1617 if (srcFormat
== PIPE_FORMAT_NONE
) {
1618 assert(0 && "cannot choose a format for src of CopyPixels");
1623 /* Invert src region if needed */
1624 if (st_fb_orientation(ctx
->ReadBuffer
) == Y_0_TOP
) {
1625 srcy
= ctx
->ReadBuffer
->Height
- srcy
- height
;
1626 invertTex
= !invertTex
;
1629 /* Clip the read region against the src buffer bounds.
1630 * We'll still allocate a temporary buffer/texture for the original
1631 * src region size but we'll only read the region which is on-screen.
1632 * This may mean that we draw garbage pixels into the dest region, but
1639 if (!_mesa_clip_readpixels(ctx
, &readX
, &readY
, &readW
, &readH
, &pack
)) {
1640 /* The source region is completely out of bounds. Do nothing.
1641 * The GL spec says "Results of copies from outside the window,
1642 * or from regions of the window that are not exposed, are
1643 * hardware dependent and undefined."
1648 readW
= MAX2(0, readW
);
1649 readH
= MAX2(0, readH
);
1651 /* Allocate the temporary texture. */
1652 pt
= alloc_texture(st
, width
, height
, srcFormat
, srcBind
);
1656 sv
[0] = st_create_texture_sampler_view(st
->pipe
, pt
);
1658 pipe_resource_reference(&pt
, NULL
);
1662 /* Copy the src region to the temporary texture. */
1664 struct pipe_blit_info blit
;
1666 memset(&blit
, 0, sizeof(blit
));
1667 blit
.src
.resource
= rbRead
->texture
;
1668 blit
.src
.level
= rbRead
->surface
->u
.tex
.level
;
1669 blit
.src
.format
= rbRead
->texture
->format
;
1670 blit
.src
.box
.x
= readX
;
1671 blit
.src
.box
.y
= readY
;
1672 blit
.src
.box
.z
= rbRead
->surface
->u
.tex
.first_layer
;
1673 blit
.src
.box
.width
= readW
;
1674 blit
.src
.box
.height
= readH
;
1675 blit
.src
.box
.depth
= 1;
1676 blit
.dst
.resource
= pt
;
1678 blit
.dst
.format
= pt
->format
;
1679 blit
.dst
.box
.x
= pack
.SkipPixels
;
1680 blit
.dst
.box
.y
= pack
.SkipRows
;
1682 blit
.dst
.box
.width
= readW
;
1683 blit
.dst
.box
.height
= readH
;
1684 blit
.dst
.box
.depth
= 1;
1685 blit
.mask
= util_format_get_mask(pt
->format
) & ~PIPE_MASK_S
;
1686 blit
.filter
= PIPE_TEX_FILTER_NEAREST
;
1688 pipe
->blit(pipe
, &blit
);
1691 /* OK, the texture 'pt' contains the src image/pixels. Now draw a
1692 * textured quad with that texture.
1694 draw_textured_quad(ctx
, dstx
, dsty
, ctx
->Current
.RasterPos
[2],
1695 width
, height
, ctx
->Pixel
.ZoomX
, ctx
->Pixel
.ZoomY
,
1700 ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR0
],
1701 invertTex
, GL_FALSE
, GL_FALSE
);
1703 pipe_resource_reference(&pt
, NULL
);
1704 pipe_sampler_view_reference(&sv
[0], NULL
);
1709 void st_init_drawpixels_functions(struct dd_function_table
*functions
)
1711 functions
->DrawPixels
= st_DrawPixels
;
1712 functions
->CopyPixels
= st_CopyPixels
;
1717 st_destroy_drawpix(struct st_context
*st
)
1721 for (i
= 0; i
< ARRAY_SIZE(st
->drawpix
.zs_shaders
); i
++) {
1722 if (st
->drawpix
.zs_shaders
[i
])
1723 cso_delete_fragment_shader(st
->cso_context
,
1724 st
->drawpix
.zs_shaders
[i
]);
1727 if (st
->drawpix
.vert_shaders
[0])
1728 cso_delete_vertex_shader(st
->cso_context
, st
->drawpix
.vert_shaders
[0]);
1729 if (st
->drawpix
.vert_shaders
[1])
1730 cso_delete_vertex_shader(st
->cso_context
, st
->drawpix
.vert_shaders
[1]);
1732 /* Free cache data */
1733 for (i
= 0; i
< ARRAY_SIZE(st
->drawpix_cache
.entries
); i
++) {
1734 struct drawpix_cache_entry
*entry
= &st
->drawpix_cache
.entries
[i
];
1736 pipe_resource_reference(&entry
->texture
, NULL
);