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 unsigned 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 * Make texture containing an image for glDrawPixels image.
379 * If 'pixels' is NULL, leave the texture image data undefined.
381 static struct pipe_resource
*
382 make_texture(struct st_context
*st
,
383 GLsizei width
, GLsizei height
, GLenum format
, GLenum type
,
384 const struct gl_pixelstore_attrib
*unpack
,
387 struct gl_context
*ctx
= st
->ctx
;
388 struct pipe_context
*pipe
= st
->pipe
;
390 struct pipe_resource
*pt
= NULL
;
391 enum pipe_format pipeFormat
;
392 GLenum baseInternalFormat
;
394 #if USE_DRAWPIXELS_CACHE
395 const GLint bpp
= _mesa_bytes_per_pixel(format
, type
);
397 /* Check if the glDrawPixels() parameters and state matches the cache */
398 if (width
== st
->drawpix_cache
.width
&&
399 height
== st
->drawpix_cache
.height
&&
400 format
== st
->drawpix_cache
.format
&&
401 type
== st
->drawpix_cache
.type
&&
402 pixels
== st
->drawpix_cache
.user_pointer
&&
403 !_mesa_is_bufferobj(unpack
->BufferObj
) &&
404 (unpack
->RowLength
== 0 || unpack
->RowLength
== width
) &&
405 unpack
->SkipPixels
== 0 &&
406 unpack
->SkipRows
== 0 &&
407 unpack
->SwapBytes
== GL_FALSE
&&
408 st
->drawpix_cache
.image
) {
409 assert(st
->drawpix_cache
.texture
);
411 /* check if the pixel data is the same */
412 if (memcmp(pixels
, st
->drawpix_cache
.image
, width
* height
* bpp
) == 0) {
413 /* OK, re-use the cached texture */
414 pipe_resource_reference(&pt
, st
->drawpix_cache
.texture
);
415 /* refcount of returned texture should be at least two here. One
416 * reference for the cache to hold on to, one for the caller (which
417 * it will release), and possibly more held by the driver.
419 assert(pt
->reference
.count
>= 2);
424 /* discard the cached image and texture (if there is one) */
425 st
->drawpix_cache
.width
= 0;
426 st
->drawpix_cache
.height
= 0;
427 st
->drawpix_cache
.user_pointer
= NULL
;
428 if (st
->drawpix_cache
.image
) {
429 free(st
->drawpix_cache
.image
);
430 st
->drawpix_cache
.image
= NULL
;
432 pipe_resource_reference(&st
->drawpix_cache
.texture
, NULL
);
435 /* Choose a pixel format for the temp texture which will hold the
438 pipeFormat
= st_choose_matching_format(st
, PIPE_BIND_SAMPLER_VIEW
,
439 format
, type
, unpack
->SwapBytes
);
441 if (pipeFormat
== PIPE_FORMAT_NONE
) {
442 /* Use the generic approach. */
443 GLenum intFormat
= internal_format(ctx
, format
, type
);
445 pipeFormat
= st_choose_format(st
, intFormat
, format
, type
,
446 st
->internal_target
, 0,
447 PIPE_BIND_SAMPLER_VIEW
, FALSE
);
448 assert(pipeFormat
!= PIPE_FORMAT_NONE
);
451 mformat
= st_pipe_format_to_mesa_format(pipeFormat
);
452 baseInternalFormat
= _mesa_get_format_base_format(mformat
);
454 pixels
= _mesa_map_pbo_source(ctx
, unpack
, pixels
);
458 /* alloc temporary texture */
459 pt
= alloc_texture(st
, width
, height
, pipeFormat
, PIPE_BIND_SAMPLER_VIEW
);
461 _mesa_unmap_pbo_source(ctx
, unpack
);
466 struct pipe_transfer
*transfer
;
469 const GLbitfield imageTransferStateSave
= ctx
->_ImageTransferState
;
471 /* we'll do pixel transfer in a fragment shader */
472 ctx
->_ImageTransferState
= 0x0;
474 /* map texture transfer */
475 dest
= pipe_transfer_map(pipe
, pt
, 0, 0,
476 PIPE_TRANSFER_WRITE
, 0, 0,
477 width
, height
, &transfer
);
480 /* Put image into texture transfer.
481 * Note that the image is actually going to be upside down in
482 * the texture. We deal with that with texcoords.
484 if ((format
== GL_RGBA
|| format
== GL_BGRA
)
485 && type
== GL_UNSIGNED_BYTE
) {
486 /* Use a memcpy-based texstore to avoid software pixel swizzling.
487 * We'll do the necessary swizzling with the pipe_sampler_view to
488 * give much better performance.
489 * XXX in the future, expand this to accomodate more format and
492 _mesa_memcpy_texture(ctx
, 2,
493 mformat
, /* mesa_format */
494 transfer
->stride
, /* dstRowStride, bytes */
495 &dest
, /* destSlices */
496 width
, height
, 1, /* size */
497 format
, type
, /* src format/type */
498 pixels
, /* data source */
503 success
= _mesa_texstore(ctx
, 2, /* dims */
504 baseInternalFormat
, /* baseInternalFormat */
505 mformat
, /* mesa_format */
506 transfer
->stride
, /* dstRowStride, bytes */
507 &dest
, /* destSlices */
508 width
, height
, 1, /* size */
509 format
, type
, /* src format/type */
510 pixels
, /* data source */
515 pipe_transfer_unmap(pipe
, transfer
);
520 ctx
->_ImageTransferState
= imageTransferStateSave
;
523 _mesa_unmap_pbo_source(ctx
, unpack
);
525 #if USE_DRAWPIXELS_CACHE
526 /* Save the glDrawPixels parameter and image in the cache */
527 if ((unpack
->RowLength
== 0 || unpack
->RowLength
== width
) &&
528 unpack
->SkipPixels
== 0 &&
529 unpack
->SkipRows
== 0) {
530 st
->drawpix_cache
.width
= width
;
531 st
->drawpix_cache
.height
= height
;
532 st
->drawpix_cache
.format
= format
;
533 st
->drawpix_cache
.type
= type
;
534 st
->drawpix_cache
.user_pointer
= pixels
;
535 assert(!st
->drawpix_cache
.image
);
536 st
->drawpix_cache
.image
= malloc(width
* height
* bpp
);
537 if (st
->drawpix_cache
.image
) {
538 memcpy(st
->drawpix_cache
.image
, pixels
, width
* height
* bpp
);
539 pipe_resource_reference(&st
->drawpix_cache
.texture
, pt
);
542 /* out of memory, free/disable cached texture */
543 st
->drawpix_cache
.width
= 0;
544 st
->drawpix_cache
.height
= 0;
545 pipe_resource_reference(&st
->drawpix_cache
.texture
, NULL
);
555 draw_textured_quad(struct gl_context
*ctx
, GLint x
, GLint y
, GLfloat z
,
556 GLsizei width
, GLsizei height
,
557 GLfloat zoomX
, GLfloat zoomY
,
558 struct pipe_sampler_view
**sv
,
559 int num_sampler_view
,
562 struct st_fp_variant
*fpv
,
563 const GLfloat
*color
,
565 GLboolean write_depth
, GLboolean write_stencil
)
567 struct st_context
*st
= st_context(ctx
);
568 struct pipe_context
*pipe
= st
->pipe
;
569 struct cso_context
*cso
= st
->cso_context
;
570 const unsigned fb_width
= _mesa_geometric_width(ctx
->DrawBuffer
);
571 const unsigned fb_height
= _mesa_geometric_height(ctx
->DrawBuffer
);
572 GLfloat x0
, y0
, x1
, y1
;
574 boolean normalized
= sv
[0]->texture
->target
== PIPE_TEXTURE_2D
;
575 unsigned cso_state_mask
;
577 assert(sv
[0]->texture
->target
== st
->internal_target
);
580 /* XXX if DrawPixels image is larger than max texture size, break
583 maxSize
= 1 << (pipe
->screen
->get_param(pipe
->screen
,
584 PIPE_CAP_MAX_TEXTURE_2D_LEVELS
) - 1);
585 assert(width
<= maxSize
);
586 assert(height
<= maxSize
);
588 cso_state_mask
= (CSO_BIT_RASTERIZER
|
590 CSO_BIT_FRAGMENT_SAMPLERS
|
591 CSO_BIT_FRAGMENT_SAMPLER_VIEWS
|
592 CSO_BIT_STREAM_OUTPUTS
|
593 CSO_BIT_VERTEX_ELEMENTS
|
594 CSO_BIT_AUX_VERTEX_BUFFER_SLOT
|
595 CSO_BITS_ALL_SHADERS
);
597 cso_state_mask
|= (CSO_BIT_DEPTH_STENCIL_ALPHA
|
600 cso_save_state(cso
, cso_state_mask
);
602 /* rasterizer state: just scissor */
604 struct pipe_rasterizer_state rasterizer
;
605 memset(&rasterizer
, 0, sizeof(rasterizer
));
606 rasterizer
.clamp_fragment_color
= !st
->clamp_frag_color_in_shader
&&
607 ctx
->Color
._ClampFragmentColor
;
608 rasterizer
.half_pixel_center
= 1;
609 rasterizer
.bottom_edge_rule
= 1;
610 rasterizer
.depth_clip
= !ctx
->Transform
.DepthClamp
;
611 rasterizer
.scissor
= ctx
->Scissor
.EnableFlags
;
612 cso_set_rasterizer(cso
, &rasterizer
);
616 /* Stencil writing bypasses the normal fragment pipeline to
617 * disable color writing and set stencil test to always pass.
619 struct pipe_depth_stencil_alpha_state dsa
;
620 struct pipe_blend_state blend
;
623 memset(&dsa
, 0, sizeof(dsa
));
624 dsa
.stencil
[0].enabled
= 1;
625 dsa
.stencil
[0].func
= PIPE_FUNC_ALWAYS
;
626 dsa
.stencil
[0].writemask
= ctx
->Stencil
.WriteMask
[0] & 0xff;
627 dsa
.stencil
[0].zpass_op
= PIPE_STENCIL_OP_REPLACE
;
629 /* writing depth+stencil: depth test always passes */
630 dsa
.depth
.enabled
= 1;
631 dsa
.depth
.writemask
= ctx
->Depth
.Mask
;
632 dsa
.depth
.func
= PIPE_FUNC_ALWAYS
;
634 cso_set_depth_stencil_alpha(cso
, &dsa
);
636 /* blend (colormask) */
637 memset(&blend
, 0, sizeof(blend
));
638 cso_set_blend(cso
, &blend
);
641 /* fragment shader state: TEX lookup program */
642 cso_set_fragment_shader_handle(cso
, driver_fp
);
644 /* vertex shader state: position + texcoord pass-through */
645 cso_set_vertex_shader_handle(cso
, driver_vp
);
647 /* disable other shaders */
648 cso_set_tessctrl_shader_handle(cso
, NULL
);
649 cso_set_tesseval_shader_handle(cso
, NULL
);
650 cso_set_geometry_shader_handle(cso
, NULL
);
652 /* user samplers, plus the drawpix samplers */
654 struct pipe_sampler_state sampler
;
656 memset(&sampler
, 0, sizeof(sampler
));
657 sampler
.wrap_s
= PIPE_TEX_WRAP_CLAMP
;
658 sampler
.wrap_t
= PIPE_TEX_WRAP_CLAMP
;
659 sampler
.wrap_r
= PIPE_TEX_WRAP_CLAMP
;
660 sampler
.min_img_filter
= PIPE_TEX_FILTER_NEAREST
;
661 sampler
.min_mip_filter
= PIPE_TEX_MIPFILTER_NONE
;
662 sampler
.mag_img_filter
= PIPE_TEX_FILTER_NEAREST
;
663 sampler
.normalized_coords
= normalized
;
666 /* drawing a color image */
667 const struct pipe_sampler_state
*samplers
[PIPE_MAX_SAMPLERS
];
668 uint num
= MAX3(fpv
->drawpix_sampler
+ 1,
669 fpv
->pixelmap_sampler
+ 1,
670 st
->state
.num_samplers
[PIPE_SHADER_FRAGMENT
]);
673 for (i
= 0; i
< st
->state
.num_samplers
[PIPE_SHADER_FRAGMENT
]; i
++)
674 samplers
[i
] = &st
->state
.samplers
[PIPE_SHADER_FRAGMENT
][i
];
676 samplers
[fpv
->drawpix_sampler
] = &sampler
;
678 samplers
[fpv
->pixelmap_sampler
] = &sampler
;
680 cso_set_samplers(cso
, PIPE_SHADER_FRAGMENT
, num
, samplers
);
682 /* drawing a depth/stencil image */
683 const struct pipe_sampler_state
*samplers
[2] = {&sampler
, &sampler
};
685 cso_set_samplers(cso
, PIPE_SHADER_FRAGMENT
, num_sampler_view
, samplers
);
689 /* user textures, plus the drawpix textures */
691 /* drawing a color image */
692 struct pipe_sampler_view
*sampler_views
[PIPE_MAX_SAMPLERS
];
693 uint num
= MAX3(fpv
->drawpix_sampler
+ 1,
694 fpv
->pixelmap_sampler
+ 1,
695 st
->state
.num_sampler_views
[PIPE_SHADER_FRAGMENT
]);
697 memcpy(sampler_views
, st
->state
.sampler_views
[PIPE_SHADER_FRAGMENT
],
698 sizeof(sampler_views
));
700 sampler_views
[fpv
->drawpix_sampler
] = sv
[0];
702 sampler_views
[fpv
->pixelmap_sampler
] = sv
[1];
703 cso_set_sampler_views(cso
, PIPE_SHADER_FRAGMENT
, num
, sampler_views
);
705 /* drawing a depth/stencil image */
706 cso_set_sampler_views(cso
, PIPE_SHADER_FRAGMENT
, num_sampler_view
, sv
);
709 /* viewport state: viewport matching window dims */
710 cso_set_viewport_dims(cso
, fb_width
, fb_height
, TRUE
);
712 cso_set_vertex_elements(cso
, 3, st
->util_velems
);
713 cso_set_stream_outputs(cso
, 0, NULL
, NULL
);
715 /* Compute Gallium window coords (y=0=top) with pixel zoom.
716 * Recall that these coords are transformed by the current
717 * vertex shader and viewport transformation.
719 if (st_fb_orientation(ctx
->DrawBuffer
) == Y_0_BOTTOM
) {
720 y
= fb_height
- (int) (y
+ height
* ctx
->Pixel
.ZoomY
);
721 invertTex
= !invertTex
;
725 x1
= x
+ width
* ctx
->Pixel
.ZoomX
;
727 y1
= y
+ height
* ctx
->Pixel
.ZoomY
;
729 /* convert Z from [0,1] to [-1,-1] to match viewport Z scale/bias */
733 const float clip_x0
= x0
/ (float) fb_width
* 2.0f
- 1.0f
;
734 const float clip_y0
= y0
/ (float) fb_height
* 2.0f
- 1.0f
;
735 const float clip_x1
= x1
/ (float) fb_width
* 2.0f
- 1.0f
;
736 const float clip_y1
= y1
/ (float) fb_height
* 2.0f
- 1.0f
;
737 const float maxXcoord
= normalized
?
738 ((float) width
/ sv
[0]->texture
->width0
) : (float) width
;
739 const float maxYcoord
= normalized
740 ? ((float) height
/ sv
[0]->texture
->height0
) : (float) height
;
741 const float sLeft
= 0.0f
, sRight
= maxXcoord
;
742 const float tTop
= invertTex
? maxYcoord
: 0.0f
;
743 const float tBot
= invertTex
? 0.0f
: maxYcoord
;
745 if (!st_draw_quad(st
, clip_x0
, clip_y0
, clip_x1
, clip_y1
, z
,
746 sLeft
, tBot
, sRight
, tTop
, color
, 0)) {
747 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glDrawPixels");
752 cso_restore_state(cso
);
757 * Software fallback to do glDrawPixels(GL_STENCIL_INDEX) when we
758 * can't use a fragment shader to write stencil values.
761 draw_stencil_pixels(struct gl_context
*ctx
, GLint x
, GLint y
,
762 GLsizei width
, GLsizei height
, GLenum format
, GLenum type
,
763 const struct gl_pixelstore_attrib
*unpack
,
766 struct st_context
*st
= st_context(ctx
);
767 struct pipe_context
*pipe
= st
->pipe
;
768 struct st_renderbuffer
*strb
;
769 enum pipe_transfer_usage usage
;
770 struct pipe_transfer
*pt
;
771 const GLboolean zoom
= ctx
->Pixel
.ZoomX
!= 1.0 || ctx
->Pixel
.ZoomY
!= 1.0;
773 struct gl_pixelstore_attrib clippedUnpack
= *unpack
;
778 if (!_mesa_clip_drawpixels(ctx
, &x
, &y
, &width
, &height
,
780 /* totally clipped */
785 strb
= st_renderbuffer(ctx
->DrawBuffer
->
786 Attachment
[BUFFER_STENCIL
].Renderbuffer
);
788 if (st_fb_orientation(ctx
->DrawBuffer
) == Y_0_TOP
) {
789 y
= ctx
->DrawBuffer
->Height
- y
- height
;
792 if (format
== GL_STENCIL_INDEX
&&
793 _mesa_is_format_packed_depth_stencil(strb
->Base
.Format
)) {
794 /* writing stencil to a combined depth+stencil buffer */
795 usage
= PIPE_TRANSFER_READ_WRITE
;
798 usage
= PIPE_TRANSFER_WRITE
;
801 stmap
= pipe_transfer_map(pipe
, strb
->texture
,
802 strb
->surface
->u
.tex
.level
,
803 strb
->surface
->u
.tex
.first_layer
,
807 pixels
= _mesa_map_pbo_source(ctx
, &clippedUnpack
, pixels
);
810 sValues
= malloc(width
* sizeof(GLubyte
));
811 zValues
= malloc(width
* sizeof(GLuint
));
813 if (sValues
&& zValues
) {
815 for (row
= 0; row
< height
; row
++) {
816 GLfloat
*zValuesFloat
= (GLfloat
*)zValues
;
817 GLenum destType
= GL_UNSIGNED_BYTE
;
818 const void *source
= _mesa_image_address2d(&clippedUnpack
, pixels
,
822 _mesa_unpack_stencil_span(ctx
, width
, destType
, sValues
,
823 type
, source
, &clippedUnpack
,
824 ctx
->_ImageTransferState
);
826 if (format
== GL_DEPTH_STENCIL
) {
828 pt
->resource
->format
== PIPE_FORMAT_Z32_FLOAT_S8X24_UINT
?
829 GL_FLOAT
: GL_UNSIGNED_INT
;
831 _mesa_unpack_depth_span(ctx
, width
, ztype
, zValues
,
832 (1 << 24) - 1, type
, source
,
837 _mesa_problem(ctx
, "Gallium glDrawPixels(GL_STENCIL) with "
838 "zoom not complete");
844 if (st_fb_orientation(ctx
->DrawBuffer
) == Y_0_TOP
) {
845 spanY
= height
- row
- 1;
851 /* now pack the stencil (and Z) values in the dest format */
852 switch (pt
->resource
->format
) {
853 case PIPE_FORMAT_S8_UINT
:
855 ubyte
*dest
= stmap
+ spanY
* pt
->stride
;
856 assert(usage
== PIPE_TRANSFER_WRITE
);
857 memcpy(dest
, sValues
, width
);
860 case PIPE_FORMAT_Z24_UNORM_S8_UINT
:
861 if (format
== GL_DEPTH_STENCIL
) {
862 uint
*dest
= (uint
*) (stmap
+ spanY
* pt
->stride
);
864 assert(usage
== PIPE_TRANSFER_WRITE
);
865 for (k
= 0; k
< width
; k
++) {
866 dest
[k
] = zValues
[k
] | (sValues
[k
] << 24);
870 uint
*dest
= (uint
*) (stmap
+ spanY
* pt
->stride
);
872 assert(usage
== PIPE_TRANSFER_READ_WRITE
);
873 for (k
= 0; k
< width
; k
++) {
874 dest
[k
] = (dest
[k
] & 0xffffff) | (sValues
[k
] << 24);
878 case PIPE_FORMAT_S8_UINT_Z24_UNORM
:
879 if (format
== GL_DEPTH_STENCIL
) {
880 uint
*dest
= (uint
*) (stmap
+ spanY
* pt
->stride
);
882 assert(usage
== PIPE_TRANSFER_WRITE
);
883 for (k
= 0; k
< width
; k
++) {
884 dest
[k
] = (zValues
[k
] << 8) | (sValues
[k
] & 0xff);
888 uint
*dest
= (uint
*) (stmap
+ spanY
* pt
->stride
);
890 assert(usage
== PIPE_TRANSFER_READ_WRITE
);
891 for (k
= 0; k
< width
; k
++) {
892 dest
[k
] = (dest
[k
] & 0xffffff00) | (sValues
[k
] & 0xff);
896 case PIPE_FORMAT_Z32_FLOAT_S8X24_UINT
:
897 if (format
== GL_DEPTH_STENCIL
) {
898 uint
*dest
= (uint
*) (stmap
+ spanY
* pt
->stride
);
899 GLfloat
*destf
= (GLfloat
*)dest
;
901 assert(usage
== PIPE_TRANSFER_WRITE
);
902 for (k
= 0; k
< width
; k
++) {
903 destf
[k
*2] = zValuesFloat
[k
];
904 dest
[k
*2+1] = sValues
[k
] & 0xff;
908 uint
*dest
= (uint
*) (stmap
+ spanY
* pt
->stride
);
910 assert(usage
== PIPE_TRANSFER_READ_WRITE
);
911 for (k
= 0; k
< width
; k
++) {
912 dest
[k
*2+1] = sValues
[k
] & 0xff;
923 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glDrawPixels()");
929 _mesa_unmap_pbo_source(ctx
, &clippedUnpack
);
931 /* unmap the stencil buffer */
932 pipe_transfer_unmap(pipe
, pt
);
937 * Get fragment program variant for a glDrawPixels or glCopyPixels
938 * command for RGBA data.
940 static struct st_fp_variant
*
941 get_color_fp_variant(struct st_context
*st
)
943 struct gl_context
*ctx
= st
->ctx
;
944 struct st_fp_variant_key key
;
945 struct st_fp_variant
*fpv
;
947 memset(&key
, 0, sizeof(key
));
949 key
.st
= st
->has_shareable_shaders
? NULL
: st
;
951 key
.scaleAndBias
= (ctx
->Pixel
.RedBias
!= 0.0 ||
952 ctx
->Pixel
.RedScale
!= 1.0 ||
953 ctx
->Pixel
.GreenBias
!= 0.0 ||
954 ctx
->Pixel
.GreenScale
!= 1.0 ||
955 ctx
->Pixel
.BlueBias
!= 0.0 ||
956 ctx
->Pixel
.BlueScale
!= 1.0 ||
957 ctx
->Pixel
.AlphaBias
!= 0.0 ||
958 ctx
->Pixel
.AlphaScale
!= 1.0);
959 key
.pixelMaps
= ctx
->Pixel
.MapColorFlag
;
960 key
.clamp_color
= st
->clamp_frag_color_in_shader
&&
961 ctx
->Color
._ClampFragmentColor
;
963 fpv
= st_get_fp_variant(st
, st
->fp
, &key
);
970 * Clamp glDrawPixels width and height to the maximum texture size.
973 clamp_size(struct pipe_context
*pipe
, GLsizei
*width
, GLsizei
*height
,
974 struct gl_pixelstore_attrib
*unpack
)
977 1 << (pipe
->screen
->get_param(pipe
->screen
,
978 PIPE_CAP_MAX_TEXTURE_2D_LEVELS
) - 1);
980 if (*width
> maxSize
) {
981 if (unpack
->RowLength
== 0)
982 unpack
->RowLength
= *width
;
985 if (*height
> maxSize
) {
992 * Search the array of 4 swizzle components for the named component and return
996 search_swizzle(const unsigned char swizzle
[4], unsigned component
)
999 for (i
= 0; i
< 4; i
++) {
1000 if (swizzle
[i
] == component
)
1003 assert(!"search_swizzle() failed");
1009 * Set the sampler view's swizzle terms. This is used to handle RGBA
1010 * swizzling when the incoming image format isn't an exact match for
1011 * the actual texture format. For example, if we have glDrawPixels(
1012 * GL_RGBA, GL_UNSIGNED_BYTE) and we chose the texture format
1013 * PIPE_FORMAT_B8G8R8A8 then we can do use the sampler view swizzle to
1014 * avoid swizzling all the pixels in software in the texstore code.
1017 setup_sampler_swizzle(struct pipe_sampler_view
*sv
, GLenum format
, GLenum type
)
1019 if ((format
== GL_RGBA
|| format
== GL_BGRA
) && type
== GL_UNSIGNED_BYTE
) {
1020 const struct util_format_description
*desc
=
1021 util_format_description(sv
->texture
->format
);
1022 unsigned c0
, c1
, c2
, c3
;
1024 /* Every gallium driver supports at least one 32-bit packed RGBA format.
1025 * We must have chosen one for (GL_RGBA, GL_UNSIGNED_BYTE).
1027 assert(desc
->block
.bits
== 32);
1029 /* invert the format's swizzle to setup the sampler's swizzle */
1030 if (format
== GL_RGBA
) {
1031 c0
= PIPE_SWIZZLE_X
;
1032 c1
= PIPE_SWIZZLE_Y
;
1033 c2
= PIPE_SWIZZLE_Z
;
1034 c3
= PIPE_SWIZZLE_W
;
1037 assert(format
== GL_BGRA
);
1038 c0
= PIPE_SWIZZLE_Z
;
1039 c1
= PIPE_SWIZZLE_Y
;
1040 c2
= PIPE_SWIZZLE_X
;
1041 c3
= PIPE_SWIZZLE_W
;
1043 sv
->swizzle_r
= search_swizzle(desc
->swizzle
, c0
);
1044 sv
->swizzle_g
= search_swizzle(desc
->swizzle
, c1
);
1045 sv
->swizzle_b
= search_swizzle(desc
->swizzle
, c2
);
1046 sv
->swizzle_a
= search_swizzle(desc
->swizzle
, c3
);
1049 /* use the default sampler swizzle */
1055 * Called via ctx->Driver.DrawPixels()
1058 st_DrawPixels(struct gl_context
*ctx
, GLint x
, GLint y
,
1059 GLsizei width
, GLsizei height
,
1060 GLenum format
, GLenum type
,
1061 const struct gl_pixelstore_attrib
*unpack
, const void *pixels
)
1063 void *driver_vp
, *driver_fp
;
1064 struct st_context
*st
= st_context(ctx
);
1065 struct pipe_context
*pipe
= st
->pipe
;
1066 GLboolean write_stencil
= GL_FALSE
, write_depth
= GL_FALSE
;
1067 struct pipe_sampler_view
*sv
[2] = { NULL
};
1068 int num_sampler_view
= 1;
1069 struct gl_pixelstore_attrib clippedUnpack
;
1070 struct st_fp_variant
*fpv
= NULL
;
1071 struct pipe_resource
*pt
;
1073 /* Mesa state should be up to date by now */
1074 assert(ctx
->NewState
== 0x0);
1076 _mesa_update_draw_buffer_bounds(ctx
, ctx
->DrawBuffer
);
1078 st_flush_bitmap_cache(st
);
1079 st_invalidate_readpix_cache(st
);
1081 st_validate_state(st
, ST_PIPELINE_RENDER
);
1083 /* Limit the size of the glDrawPixels to the max texture size.
1084 * Strictly speaking, that's not correct but since we don't handle
1085 * larger images yet, this is better than crashing.
1087 clippedUnpack
= *unpack
;
1088 unpack
= &clippedUnpack
;
1089 clamp_size(st
->pipe
, &width
, &height
, &clippedUnpack
);
1091 if (format
== GL_DEPTH_STENCIL
)
1092 write_stencil
= write_depth
= GL_TRUE
;
1093 else if (format
== GL_STENCIL_INDEX
)
1094 write_stencil
= GL_TRUE
;
1095 else if (format
== GL_DEPTH_COMPONENT
)
1096 write_depth
= GL_TRUE
;
1098 if (write_stencil
&&
1099 !pipe
->screen
->get_param(pipe
->screen
, PIPE_CAP_SHADER_STENCIL_EXPORT
)) {
1100 /* software fallback */
1101 draw_stencil_pixels(ctx
, x
, y
, width
, height
, format
, type
,
1107 * Get vertex/fragment shaders
1109 if (write_depth
|| write_stencil
) {
1110 driver_fp
= get_drawpix_z_stencil_program(st
, write_depth
,
1112 driver_vp
= make_passthrough_vertex_shader(st
, GL_TRUE
);
1115 fpv
= get_color_fp_variant(st
);
1117 driver_fp
= fpv
->driver_shader
;
1118 driver_vp
= make_passthrough_vertex_shader(st
, GL_FALSE
);
1120 if (ctx
->Pixel
.MapColorFlag
) {
1121 pipe_sampler_view_reference(&sv
[1],
1122 st
->pixel_xfer
.pixelmap_sampler_view
);
1126 /* compiling a new fragment shader variant added new state constants
1127 * into the constant buffer, we need to update them
1129 st_upload_constants(st
, &st
->fp
->Base
);
1132 /* Put glDrawPixels image into a texture */
1133 pt
= make_texture(st
, width
, height
, format
, type
, unpack
, pixels
);
1135 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glDrawPixels");
1139 /* create sampler view for the image */
1140 sv
[0] = st_create_texture_sampler_view(st
->pipe
, pt
);
1142 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glDrawPixels");
1143 pipe_resource_reference(&pt
, NULL
);
1147 /* Set up the sampler view's swizzle */
1148 setup_sampler_swizzle(sv
[0], format
, type
);
1150 /* Create a second sampler view to read stencil. The stencil is
1151 * written using the shader stencil export functionality.
1153 if (write_stencil
) {
1154 enum pipe_format stencil_format
=
1155 util_format_stencil_only(pt
->format
);
1156 /* we should not be doing pixel map/transfer (see above) */
1157 assert(num_sampler_view
== 1);
1158 sv
[1] = st_create_texture_sampler_view_format(st
->pipe
, pt
,
1161 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glDrawPixels");
1162 pipe_resource_reference(&pt
, NULL
);
1163 pipe_sampler_view_reference(&sv
[0], NULL
);
1169 draw_textured_quad(ctx
, x
, y
, ctx
->Current
.RasterPos
[2],
1171 ctx
->Pixel
.ZoomX
, ctx
->Pixel
.ZoomY
,
1176 ctx
->Current
.RasterColor
,
1177 GL_FALSE
, write_depth
, write_stencil
);
1178 pipe_sampler_view_reference(&sv
[0], NULL
);
1179 if (num_sampler_view
> 1)
1180 pipe_sampler_view_reference(&sv
[1], NULL
);
1182 /* free the texture (but may persist in the cache) */
1183 pipe_resource_reference(&pt
, NULL
);
1189 * Software fallback for glCopyPixels(GL_STENCIL).
1192 copy_stencil_pixels(struct gl_context
*ctx
, GLint srcx
, GLint srcy
,
1193 GLsizei width
, GLsizei height
,
1194 GLint dstx
, GLint dsty
)
1196 struct st_renderbuffer
*rbDraw
;
1197 struct pipe_context
*pipe
= st_context(ctx
)->pipe
;
1198 enum pipe_transfer_usage usage
;
1199 struct pipe_transfer
*ptDraw
;
1204 buffer
= malloc(width
* height
* sizeof(ubyte
));
1206 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glCopyPixels(stencil)");
1210 /* Get the dest renderbuffer */
1211 rbDraw
= st_renderbuffer(ctx
->DrawBuffer
->
1212 Attachment
[BUFFER_STENCIL
].Renderbuffer
);
1214 /* this will do stencil pixel transfer ops */
1215 _mesa_readpixels(ctx
, srcx
, srcy
, width
, height
,
1216 GL_STENCIL_INDEX
, GL_UNSIGNED_BYTE
,
1217 &ctx
->DefaultPacking
, buffer
);
1220 /* debug code: dump stencil values */
1222 for (row
= 0; row
< height
; row
++) {
1223 printf("%3d: ", row
);
1224 for (col
= 0; col
< width
; col
++) {
1225 printf("%02x ", buffer
[col
+ row
* width
]);
1231 if (_mesa_is_format_packed_depth_stencil(rbDraw
->Base
.Format
))
1232 usage
= PIPE_TRANSFER_READ_WRITE
;
1234 usage
= PIPE_TRANSFER_WRITE
;
1236 if (st_fb_orientation(ctx
->DrawBuffer
) == Y_0_TOP
) {
1237 dsty
= rbDraw
->Base
.Height
- dsty
- height
;
1240 assert(util_format_get_blockwidth(rbDraw
->texture
->format
) == 1);
1241 assert(util_format_get_blockheight(rbDraw
->texture
->format
) == 1);
1243 /* map the stencil buffer */
1244 drawMap
= pipe_transfer_map(pipe
,
1246 rbDraw
->surface
->u
.tex
.level
,
1247 rbDraw
->surface
->u
.tex
.first_layer
,
1249 width
, height
, &ptDraw
);
1252 /* XXX PixelZoom not handled yet */
1253 for (i
= 0; i
< height
; i
++) {
1260 if (st_fb_orientation(ctx
->DrawBuffer
) == Y_0_TOP
) {
1264 dst
= drawMap
+ y
* ptDraw
->stride
;
1265 src
= buffer
+ i
* width
;
1267 _mesa_pack_ubyte_stencil_row(rbDraw
->Base
.Format
, width
, src
, dst
);
1272 /* unmap the stencil buffer */
1273 pipe_transfer_unmap(pipe
, ptDraw
);
1278 * Return renderbuffer to use for reading color pixels for glCopyPixels
1280 static struct st_renderbuffer
*
1281 st_get_color_read_renderbuffer(struct gl_context
*ctx
)
1283 struct gl_framebuffer
*fb
= ctx
->ReadBuffer
;
1284 struct st_renderbuffer
*strb
=
1285 st_renderbuffer(fb
->_ColorReadBuffer
);
1292 * Try to do a glCopyPixels for simple cases with a blit by calling
1295 * We can do this when we're copying color pixels (depth/stencil
1296 * eventually) with no pixel zoom, no pixel transfer ops, no
1297 * per-fragment ops, and the src/dest regions don't overlap.
1300 blit_copy_pixels(struct gl_context
*ctx
, GLint srcx
, GLint srcy
,
1301 GLsizei width
, GLsizei height
,
1302 GLint dstx
, GLint dsty
, GLenum type
)
1304 struct st_context
*st
= st_context(ctx
);
1305 struct pipe_context
*pipe
= st
->pipe
;
1306 struct pipe_screen
*screen
= pipe
->screen
;
1307 struct gl_pixelstore_attrib pack
, unpack
;
1308 GLint readX
, readY
, readW
, readH
, drawX
, drawY
, drawW
, drawH
;
1310 if (type
== GL_COLOR
&&
1311 ctx
->Pixel
.ZoomX
== 1.0 &&
1312 ctx
->Pixel
.ZoomY
== 1.0 &&
1313 ctx
->_ImageTransferState
== 0x0 &&
1314 !ctx
->Color
.BlendEnabled
&&
1315 !ctx
->Color
.AlphaEnabled
&&
1316 (!ctx
->Color
.ColorLogicOpEnabled
|| ctx
->Color
.LogicOp
== GL_COPY
) &&
1318 !ctx
->Fog
.Enabled
&&
1319 !ctx
->Stencil
.Enabled
&&
1320 !ctx
->FragmentProgram
.Enabled
&&
1321 !ctx
->VertexProgram
.Enabled
&&
1322 !ctx
->_Shader
->CurrentProgram
[MESA_SHADER_FRAGMENT
] &&
1323 !_mesa_ati_fragment_shader_enabled(ctx
) &&
1324 ctx
->DrawBuffer
->_NumColorDrawBuffers
== 1 &&
1325 !ctx
->Query
.CondRenderQuery
&&
1326 !ctx
->Query
.CurrentOcclusionObject
) {
1327 struct st_renderbuffer
*rbRead
, *rbDraw
;
1330 * Clip the read region against the src buffer bounds.
1331 * We'll still allocate a temporary buffer/texture for the original
1332 * src region size but we'll only read the region which is on-screen.
1333 * This may mean that we draw garbage pixels into the dest region, but
1340 pack
= ctx
->DefaultPacking
;
1341 if (!_mesa_clip_readpixels(ctx
, &readX
, &readY
, &readW
, &readH
, &pack
))
1342 return GL_TRUE
; /* all done */
1344 /* clip against dest buffer bounds and scissor box */
1345 drawX
= dstx
+ pack
.SkipPixels
;
1346 drawY
= dsty
+ pack
.SkipRows
;
1348 if (!_mesa_clip_drawpixels(ctx
, &drawX
, &drawY
, &readW
, &readH
, &unpack
))
1349 return GL_TRUE
; /* all done */
1351 readX
= readX
- pack
.SkipPixels
+ unpack
.SkipPixels
;
1352 readY
= readY
- pack
.SkipRows
+ unpack
.SkipRows
;
1357 rbRead
= st_get_color_read_renderbuffer(ctx
);
1358 rbDraw
= st_renderbuffer(ctx
->DrawBuffer
->_ColorDrawBuffers
[0]);
1360 /* Flip src/dst position depending on the orientation of buffers. */
1361 if (st_fb_orientation(ctx
->ReadBuffer
) == Y_0_TOP
) {
1362 readY
= rbRead
->Base
.Height
- readY
;
1366 if (st_fb_orientation(ctx
->DrawBuffer
) == Y_0_TOP
) {
1367 /* We can't flip the destination for pipe->blit, so we only adjust
1368 * its position and flip the source.
1370 drawY
= rbDraw
->Base
.Height
- drawY
- drawH
;
1375 if (rbRead
!= rbDraw
||
1376 !_mesa_regions_overlap(readX
, readY
, readX
+ readW
, readY
+ readH
,
1377 drawX
, drawY
, drawX
+ drawW
, drawY
+ drawH
)) {
1378 struct pipe_blit_info blit
;
1380 memset(&blit
, 0, sizeof(blit
));
1381 blit
.src
.resource
= rbRead
->texture
;
1382 blit
.src
.level
= rbRead
->surface
->u
.tex
.level
;
1383 blit
.src
.format
= rbRead
->texture
->format
;
1384 blit
.src
.box
.x
= readX
;
1385 blit
.src
.box
.y
= readY
;
1386 blit
.src
.box
.z
= rbRead
->surface
->u
.tex
.first_layer
;
1387 blit
.src
.box
.width
= readW
;
1388 blit
.src
.box
.height
= readH
;
1389 blit
.src
.box
.depth
= 1;
1390 blit
.dst
.resource
= rbDraw
->texture
;
1391 blit
.dst
.level
= rbDraw
->surface
->u
.tex
.level
;
1392 blit
.dst
.format
= rbDraw
->texture
->format
;
1393 blit
.dst
.box
.x
= drawX
;
1394 blit
.dst
.box
.y
= drawY
;
1395 blit
.dst
.box
.z
= rbDraw
->surface
->u
.tex
.first_layer
;
1396 blit
.dst
.box
.width
= drawW
;
1397 blit
.dst
.box
.height
= drawH
;
1398 blit
.dst
.box
.depth
= 1;
1399 blit
.mask
= PIPE_MASK_RGBA
;
1400 blit
.filter
= PIPE_TEX_FILTER_NEAREST
;
1402 if (ctx
->DrawBuffer
!= ctx
->WinSysDrawBuffer
)
1403 st_window_rectangles_to_blit(ctx
, &blit
);
1405 if (screen
->is_format_supported(screen
, blit
.src
.format
,
1406 blit
.src
.resource
->target
,
1407 blit
.src
.resource
->nr_samples
,
1408 PIPE_BIND_SAMPLER_VIEW
) &&
1409 screen
->is_format_supported(screen
, blit
.dst
.format
,
1410 blit
.dst
.resource
->target
,
1411 blit
.dst
.resource
->nr_samples
,
1412 PIPE_BIND_RENDER_TARGET
)) {
1413 pipe
->blit(pipe
, &blit
);
1424 st_CopyPixels(struct gl_context
*ctx
, GLint srcx
, GLint srcy
,
1425 GLsizei width
, GLsizei height
,
1426 GLint dstx
, GLint dsty
, GLenum type
)
1428 struct st_context
*st
= st_context(ctx
);
1429 struct pipe_context
*pipe
= st
->pipe
;
1430 struct pipe_screen
*screen
= pipe
->screen
;
1431 struct st_renderbuffer
*rbRead
;
1432 void *driver_vp
, *driver_fp
;
1433 struct pipe_resource
*pt
;
1434 struct pipe_sampler_view
*sv
[2] = { NULL
};
1435 struct st_fp_variant
*fpv
= NULL
;
1436 int num_sampler_view
= 1;
1437 enum pipe_format srcFormat
;
1439 GLboolean invertTex
= GL_FALSE
;
1440 GLint readX
, readY
, readW
, readH
;
1441 struct gl_pixelstore_attrib pack
= ctx
->DefaultPacking
;
1443 _mesa_update_draw_buffer_bounds(ctx
, ctx
->DrawBuffer
);
1445 st_flush_bitmap_cache(st
);
1446 st_invalidate_readpix_cache(st
);
1448 st_validate_state(st
, ST_PIPELINE_RENDER
);
1450 if (type
== GL_DEPTH_STENCIL
) {
1451 /* XXX make this more efficient */
1452 st_CopyPixels(ctx
, srcx
, srcy
, width
, height
, dstx
, dsty
, GL_STENCIL
);
1453 st_CopyPixels(ctx
, srcx
, srcy
, width
, height
, dstx
, dsty
, GL_DEPTH
);
1457 if (type
== GL_STENCIL
) {
1458 /* can't use texturing to do stencil */
1459 copy_stencil_pixels(ctx
, srcx
, srcy
, width
, height
, dstx
, dsty
);
1463 if (blit_copy_pixels(ctx
, srcx
, srcy
, width
, height
, dstx
, dsty
, type
))
1467 * The subsequent code implements glCopyPixels by copying the source
1468 * pixels into a temporary texture that's then applied to a textured quad.
1469 * When we draw the textured quad, all the usual per-fragment operations
1475 * Get vertex/fragment shaders
1477 if (type
== GL_COLOR
) {
1478 fpv
= get_color_fp_variant(st
);
1480 rbRead
= st_get_color_read_renderbuffer(ctx
);
1482 driver_fp
= fpv
->driver_shader
;
1483 driver_vp
= make_passthrough_vertex_shader(st
, GL_FALSE
);
1485 if (ctx
->Pixel
.MapColorFlag
) {
1486 pipe_sampler_view_reference(&sv
[1],
1487 st
->pixel_xfer
.pixelmap_sampler_view
);
1491 /* compiling a new fragment shader variant added new state constants
1492 * into the constant buffer, we need to update them
1494 st_upload_constants(st
, &st
->fp
->Base
);
1497 assert(type
== GL_DEPTH
);
1498 rbRead
= st_renderbuffer(ctx
->ReadBuffer
->
1499 Attachment
[BUFFER_DEPTH
].Renderbuffer
);
1501 driver_fp
= get_drawpix_z_stencil_program(st
, GL_TRUE
, GL_FALSE
);
1502 driver_vp
= make_passthrough_vertex_shader(st
, GL_TRUE
);
1505 /* Choose the format for the temporary texture. */
1506 srcFormat
= rbRead
->texture
->format
;
1507 srcBind
= PIPE_BIND_SAMPLER_VIEW
|
1508 (type
== GL_COLOR
? PIPE_BIND_RENDER_TARGET
: PIPE_BIND_DEPTH_STENCIL
);
1510 if (!screen
->is_format_supported(screen
, srcFormat
, st
->internal_target
, 0,
1512 /* srcFormat is non-renderable. Find a compatible renderable format. */
1513 if (type
== GL_DEPTH
) {
1514 srcFormat
= st_choose_format(st
, GL_DEPTH_COMPONENT
, GL_NONE
,
1515 GL_NONE
, st
->internal_target
, 0,
1519 assert(type
== GL_COLOR
);
1521 if (util_format_is_float(srcFormat
)) {
1522 srcFormat
= st_choose_format(st
, GL_RGBA32F
, GL_NONE
,
1523 GL_NONE
, st
->internal_target
, 0,
1526 else if (util_format_is_pure_sint(srcFormat
)) {
1527 srcFormat
= st_choose_format(st
, GL_RGBA32I
, GL_NONE
,
1528 GL_NONE
, st
->internal_target
, 0,
1531 else if (util_format_is_pure_uint(srcFormat
)) {
1532 srcFormat
= st_choose_format(st
, GL_RGBA32UI
, GL_NONE
,
1533 GL_NONE
, st
->internal_target
, 0,
1536 else if (util_format_is_snorm(srcFormat
)) {
1537 srcFormat
= st_choose_format(st
, GL_RGBA16_SNORM
, GL_NONE
,
1538 GL_NONE
, st
->internal_target
, 0,
1542 srcFormat
= st_choose_format(st
, GL_RGBA
, GL_NONE
,
1543 GL_NONE
, st
->internal_target
, 0,
1548 if (srcFormat
== PIPE_FORMAT_NONE
) {
1549 assert(0 && "cannot choose a format for src of CopyPixels");
1554 /* Invert src region if needed */
1555 if (st_fb_orientation(ctx
->ReadBuffer
) == Y_0_TOP
) {
1556 srcy
= ctx
->ReadBuffer
->Height
- srcy
- height
;
1557 invertTex
= !invertTex
;
1560 /* Clip the read region against the src buffer bounds.
1561 * We'll still allocate a temporary buffer/texture for the original
1562 * src region size but we'll only read the region which is on-screen.
1563 * This may mean that we draw garbage pixels into the dest region, but
1570 if (!_mesa_clip_readpixels(ctx
, &readX
, &readY
, &readW
, &readH
, &pack
)) {
1571 /* The source region is completely out of bounds. Do nothing.
1572 * The GL spec says "Results of copies from outside the window,
1573 * or from regions of the window that are not exposed, are
1574 * hardware dependent and undefined."
1579 readW
= MAX2(0, readW
);
1580 readH
= MAX2(0, readH
);
1582 /* Allocate the temporary texture. */
1583 pt
= alloc_texture(st
, width
, height
, srcFormat
, srcBind
);
1587 sv
[0] = st_create_texture_sampler_view(st
->pipe
, pt
);
1589 pipe_resource_reference(&pt
, NULL
);
1593 /* Copy the src region to the temporary texture. */
1595 struct pipe_blit_info blit
;
1597 memset(&blit
, 0, sizeof(blit
));
1598 blit
.src
.resource
= rbRead
->texture
;
1599 blit
.src
.level
= rbRead
->surface
->u
.tex
.level
;
1600 blit
.src
.format
= rbRead
->texture
->format
;
1601 blit
.src
.box
.x
= readX
;
1602 blit
.src
.box
.y
= readY
;
1603 blit
.src
.box
.z
= rbRead
->surface
->u
.tex
.first_layer
;
1604 blit
.src
.box
.width
= readW
;
1605 blit
.src
.box
.height
= readH
;
1606 blit
.src
.box
.depth
= 1;
1607 blit
.dst
.resource
= pt
;
1609 blit
.dst
.format
= pt
->format
;
1610 blit
.dst
.box
.x
= pack
.SkipPixels
;
1611 blit
.dst
.box
.y
= pack
.SkipRows
;
1613 blit
.dst
.box
.width
= readW
;
1614 blit
.dst
.box
.height
= readH
;
1615 blit
.dst
.box
.depth
= 1;
1616 blit
.mask
= util_format_get_mask(pt
->format
) & ~PIPE_MASK_S
;
1617 blit
.filter
= PIPE_TEX_FILTER_NEAREST
;
1619 pipe
->blit(pipe
, &blit
);
1622 /* OK, the texture 'pt' contains the src image/pixels. Now draw a
1623 * textured quad with that texture.
1625 draw_textured_quad(ctx
, dstx
, dsty
, ctx
->Current
.RasterPos
[2],
1626 width
, height
, ctx
->Pixel
.ZoomX
, ctx
->Pixel
.ZoomY
,
1631 ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR0
],
1632 invertTex
, GL_FALSE
, GL_FALSE
);
1634 pipe_resource_reference(&pt
, NULL
);
1635 pipe_sampler_view_reference(&sv
[0], NULL
);
1640 void st_init_drawpixels_functions(struct dd_function_table
*functions
)
1642 functions
->DrawPixels
= st_DrawPixels
;
1643 functions
->CopyPixels
= st_CopyPixels
;
1648 st_destroy_drawpix(struct st_context
*st
)
1652 for (i
= 0; i
< ARRAY_SIZE(st
->drawpix
.zs_shaders
); i
++) {
1653 if (st
->drawpix
.zs_shaders
[i
])
1654 cso_delete_fragment_shader(st
->cso_context
,
1655 st
->drawpix
.zs_shaders
[i
]);
1658 if (st
->drawpix
.vert_shaders
[0])
1659 cso_delete_vertex_shader(st
->cso_context
, st
->drawpix
.vert_shaders
[0]);
1660 if (st
->drawpix
.vert_shaders
[1])
1661 cso_delete_vertex_shader(st
->cso_context
, st
->drawpix
.vert_shaders
[1]);