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/texformat.h"
45 #include "main/teximage.h"
46 #include "main/texstore.h"
47 #include "main/glformats.h"
48 #include "program/program.h"
49 #include "program/prog_print.h"
50 #include "program/prog_instruction.h"
53 #include "st_atom_constbuf.h"
54 #include "st_cb_bitmap.h"
55 #include "st_cb_drawpixels.h"
56 #include "st_cb_readpixels.h"
57 #include "st_cb_fbo.h"
58 #include "st_context.h"
61 #include "st_format.h"
62 #include "st_program.h"
63 #include "st_scissor.h"
64 #include "st_texture.h"
66 #include "pipe/p_context.h"
67 #include "pipe/p_defines.h"
68 #include "tgsi/tgsi_ureg.h"
69 #include "util/u_format.h"
70 #include "util/u_inlines.h"
71 #include "util/u_math.h"
72 #include "util/u_tile.h"
73 #include "cso_cache/cso_context.h"
77 * We have a simple glDrawPixels cache to try to optimize the case where the
78 * same image is drawn over and over again. It basically works as follows:
80 * 1. After we construct a texture map with the image and draw it, we do
81 * not discard the texture. We keep it around, plus we note the
82 * glDrawPixels width, height, format, etc. parameters and keep a copy
83 * of the image in a malloc'd buffer.
85 * 2. On the next glDrawPixels we check if the parameters match the previous
86 * call. If those match, we check if the image matches the previous image
87 * via a memcmp() call. If everything matches, we re-use the previous
88 * texture, thereby avoiding the cost creating a new texture and copying
91 * The effectiveness of this cache depends upon:
92 * 1. If the memcmp() finds a difference, it happens relatively quickly.
93 Hopefully, not just the last pixels differ!
94 * 2. If the memcmp() finds no difference, doing that check is faster than
95 * creating and loading a texture.
98 * 1. We don't support any pixel unpacking parameters.
99 * 2. We don't try to cache images in Pixel Buffer Objects.
100 * 3. Instead of saving the whole image, perhaps some sort of reliable
101 * checksum function could be used instead.
103 #define USE_DRAWPIXELS_CACHE 1
108 * Create fragment program that does a TEX() instruction to get a Z and/or
109 * stencil value value, then writes to FRAG_RESULT_DEPTH/FRAG_RESULT_STENCIL.
110 * Used for glDrawPixels(GL_DEPTH_COMPONENT / GL_STENCIL_INDEX).
111 * Pass fragment color through as-is.
113 * \return CSO of the fragment shader.
116 get_drawpix_z_stencil_program(struct st_context
*st
,
117 GLboolean write_depth
,
118 GLboolean write_stencil
)
120 struct ureg_program
*ureg
;
121 struct ureg_src depth_sampler
, stencil_sampler
;
122 struct ureg_src texcoord
, color
;
123 struct ureg_dst out_color
, out_depth
, out_stencil
;
124 const GLuint shaderIndex
= write_depth
* 2 + write_stencil
;
127 assert(shaderIndex
< ARRAY_SIZE(st
->drawpix
.zs_shaders
));
129 if (st
->drawpix
.zs_shaders
[shaderIndex
]) {
130 /* already have the proper shader */
131 return st
->drawpix
.zs_shaders
[shaderIndex
];
134 ureg
= ureg_create(PIPE_SHADER_FRAGMENT
);
138 ureg_property(ureg
, TGSI_PROPERTY_FS_COLOR0_WRITES_ALL_CBUFS
, TRUE
);
141 color
= ureg_DECL_fs_input(ureg
, TGSI_SEMANTIC_COLOR
, 0,
142 TGSI_INTERPOLATE_COLOR
);
143 out_color
= ureg_DECL_output(ureg
, TGSI_SEMANTIC_COLOR
, 0);
145 depth_sampler
= ureg_DECL_sampler(ureg
, 0);
146 ureg_DECL_sampler_view(ureg
, 0, TGSI_TEXTURE_2D
,
147 TGSI_RETURN_TYPE_FLOAT
,
148 TGSI_RETURN_TYPE_FLOAT
,
149 TGSI_RETURN_TYPE_FLOAT
,
150 TGSI_RETURN_TYPE_FLOAT
);
151 out_depth
= ureg_DECL_output(ureg
, TGSI_SEMANTIC_POSITION
, 0);
155 stencil_sampler
= ureg_DECL_sampler(ureg
, 1);
156 ureg_DECL_sampler_view(ureg
, 1, TGSI_TEXTURE_2D
,
157 TGSI_RETURN_TYPE_UINT
,
158 TGSI_RETURN_TYPE_UINT
,
159 TGSI_RETURN_TYPE_UINT
,
160 TGSI_RETURN_TYPE_UINT
);
161 out_stencil
= ureg_DECL_output(ureg
, TGSI_SEMANTIC_STENCIL
, 0);
164 texcoord
= ureg_DECL_fs_input(ureg
,
165 st
->needs_texcoord_semantic
?
166 TGSI_SEMANTIC_TEXCOORD
:
167 TGSI_SEMANTIC_GENERIC
,
168 0, TGSI_INTERPOLATE_LINEAR
);
171 ureg_TEX(ureg
, ureg_writemask(out_depth
, TGSI_WRITEMASK_Z
),
172 TGSI_TEXTURE_2D
, texcoord
, depth_sampler
);
173 ureg_MOV(ureg
, out_color
, color
);
177 ureg_TEX(ureg
, ureg_writemask(out_stencil
, TGSI_WRITEMASK_Y
),
178 TGSI_TEXTURE_2D
, texcoord
, stencil_sampler
);
181 cso
= ureg_create_shader_and_destroy(ureg
, st
->pipe
);
183 /* save the new shader */
184 st
->drawpix
.zs_shaders
[shaderIndex
] = cso
;
190 * Create a simple vertex shader that just passes through the
191 * vertex position and texcoord (and optionally, color).
194 make_passthrough_vertex_shader(struct st_context
*st
,
197 const unsigned texcoord_semantic
= st
->needs_texcoord_semantic
?
198 TGSI_SEMANTIC_TEXCOORD
: TGSI_SEMANTIC_GENERIC
;
200 if (!st
->drawpix
.vert_shaders
[passColor
]) {
201 struct ureg_program
*ureg
= ureg_create( PIPE_SHADER_VERTEX
);
206 /* MOV result.pos, vertex.pos; */
208 ureg_DECL_output( ureg
, TGSI_SEMANTIC_POSITION
, 0 ),
209 ureg_DECL_vs_input( ureg
, 0 ));
212 /* MOV result.color0, vertex.attr[1]; */
214 ureg_DECL_output( ureg
, TGSI_SEMANTIC_COLOR
, 0 ),
215 ureg_DECL_vs_input( ureg
, 1 ));
218 /* MOV result.texcoord0, vertex.attr[2]; */
220 ureg_DECL_output( ureg
, texcoord_semantic
, 0 ),
221 ureg_DECL_vs_input( ureg
, 2 ));
225 st
->drawpix
.vert_shaders
[passColor
] =
226 ureg_create_shader_and_destroy( ureg
, st
->pipe
);
229 return st
->drawpix
.vert_shaders
[passColor
];
234 * Return a texture internalFormat for drawing/copying an image
235 * of the given format and type.
238 internal_format(struct gl_context
*ctx
, GLenum format
, GLenum type
)
241 case GL_DEPTH_COMPONENT
:
243 case GL_UNSIGNED_SHORT
:
244 return GL_DEPTH_COMPONENT16
;
246 case GL_UNSIGNED_INT
:
247 return GL_DEPTH_COMPONENT32
;
250 if (ctx
->Extensions
.ARB_depth_buffer_float
)
251 return GL_DEPTH_COMPONENT32F
;
253 return GL_DEPTH_COMPONENT
;
256 return GL_DEPTH_COMPONENT
;
259 case GL_DEPTH_STENCIL
:
261 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV
:
262 return GL_DEPTH32F_STENCIL8
;
264 case GL_UNSIGNED_INT_24_8
:
266 return GL_DEPTH24_STENCIL8
;
269 case GL_STENCIL_INDEX
:
270 return GL_STENCIL_INDEX
;
273 if (_mesa_is_enum_format_integer(format
)) {
277 case GL_UNSIGNED_BYTE
:
281 case GL_UNSIGNED_SHORT
:
285 case GL_UNSIGNED_INT
:
288 assert(0 && "Unexpected type in internal_format()");
289 return GL_RGBA_INTEGER
;
294 case GL_UNSIGNED_BYTE
:
295 case GL_UNSIGNED_INT_8_8_8_8
:
296 case GL_UNSIGNED_INT_8_8_8_8_REV
:
300 case GL_UNSIGNED_BYTE_3_3_2
:
301 case GL_UNSIGNED_BYTE_2_3_3_REV
:
304 case GL_UNSIGNED_SHORT_4_4_4_4
:
305 case GL_UNSIGNED_SHORT_4_4_4_4_REV
:
308 case GL_UNSIGNED_SHORT_5_6_5
:
309 case GL_UNSIGNED_SHORT_5_6_5_REV
:
312 case GL_UNSIGNED_SHORT_5_5_5_1
:
313 case GL_UNSIGNED_SHORT_1_5_5_5_REV
:
316 case GL_UNSIGNED_INT_10_10_10_2
:
317 case GL_UNSIGNED_INT_2_10_10_10_REV
:
320 case GL_UNSIGNED_SHORT
:
321 case GL_UNSIGNED_INT
:
326 ctx
->Extensions
.EXT_texture_snorm
? GL_RGBA8_SNORM
: GL_RGBA8
;
331 ctx
->Extensions
.EXT_texture_snorm
? GL_RGBA16_SNORM
: GL_RGBA16
;
333 case GL_HALF_FLOAT_ARB
:
335 ctx
->Extensions
.ARB_texture_float
? GL_RGBA16F
:
336 ctx
->Extensions
.EXT_texture_snorm
? GL_RGBA16_SNORM
: GL_RGBA16
;
341 ctx
->Extensions
.ARB_texture_float
? GL_RGBA32F
:
342 ctx
->Extensions
.EXT_texture_snorm
? GL_RGBA16_SNORM
: GL_RGBA16
;
344 case GL_UNSIGNED_INT_5_9_9_9_REV
:
345 assert(ctx
->Extensions
.EXT_texture_shared_exponent
);
348 case GL_UNSIGNED_INT_10F_11F_11F_REV
:
349 assert(ctx
->Extensions
.EXT_packed_float
);
350 return GL_R11F_G11F_B10F
;
358 * Create a temporary texture to hold an image of the given size.
359 * If width, height are not POT and the driver only handles POT textures,
360 * allocate the next larger size of texture that is POT.
362 static struct pipe_resource
*
363 alloc_texture(struct st_context
*st
, GLsizei width
, GLsizei height
,
364 enum pipe_format texFormat
, unsigned bind
)
366 struct pipe_resource
*pt
;
368 pt
= st_texture_create(st
, st
->internal_target
, texFormat
, 0,
369 width
, height
, 1, 1, 0, bind
);
376 * Make texture containing an image for glDrawPixels image.
377 * If 'pixels' is NULL, leave the texture image data undefined.
379 static struct pipe_resource
*
380 make_texture(struct st_context
*st
,
381 GLsizei width
, GLsizei height
, GLenum format
, GLenum type
,
382 const struct gl_pixelstore_attrib
*unpack
,
385 struct gl_context
*ctx
= st
->ctx
;
386 struct pipe_context
*pipe
= st
->pipe
;
388 struct pipe_resource
*pt
= NULL
;
389 enum pipe_format pipeFormat
;
390 GLenum baseInternalFormat
;
392 #if USE_DRAWPIXELS_CACHE
393 const GLint bpp
= _mesa_bytes_per_pixel(format
, type
);
395 /* Check if the glDrawPixels() parameters and state matches the cache */
396 if (width
== st
->drawpix_cache
.width
&&
397 height
== st
->drawpix_cache
.height
&&
398 format
== st
->drawpix_cache
.format
&&
399 type
== st
->drawpix_cache
.type
&&
400 pixels
== st
->drawpix_cache
.user_pointer
&&
401 !_mesa_is_bufferobj(unpack
->BufferObj
) &&
402 (unpack
->RowLength
== 0 || unpack
->RowLength
== width
) &&
403 unpack
->SkipPixels
== 0 &&
404 unpack
->SkipRows
== 0 &&
405 unpack
->SwapBytes
== GL_FALSE
&&
406 st
->drawpix_cache
.image
) {
407 assert(st
->drawpix_cache
.texture
);
409 /* check if the pixel data is the same */
410 if (memcmp(pixels
, st
->drawpix_cache
.image
, width
* height
* bpp
) == 0) {
411 /* OK, re-use the cached texture */
412 pipe_resource_reference(&pt
, st
->drawpix_cache
.texture
);
413 /* refcount of returned texture should be at least two here. One
414 * reference for the cache to hold on to, one for the caller (which
415 * it will release), and possibly more held by the driver.
417 assert(pt
->reference
.count
>= 2);
422 /* discard the cached image and texture (if there is one) */
423 st
->drawpix_cache
.width
= 0;
424 st
->drawpix_cache
.height
= 0;
425 st
->drawpix_cache
.user_pointer
= NULL
;
426 if (st
->drawpix_cache
.image
) {
427 free(st
->drawpix_cache
.image
);
428 st
->drawpix_cache
.image
= NULL
;
430 pipe_resource_reference(&st
->drawpix_cache
.texture
, NULL
);
433 /* Choose a pixel format for the temp texture which will hold the
436 pipeFormat
= st_choose_matching_format(st
, PIPE_BIND_SAMPLER_VIEW
,
437 format
, type
, unpack
->SwapBytes
);
439 if (pipeFormat
== PIPE_FORMAT_NONE
) {
440 /* Use the generic approach. */
441 GLenum intFormat
= internal_format(ctx
, format
, type
);
443 pipeFormat
= st_choose_format(st
, intFormat
, format
, type
,
444 st
->internal_target
, 0,
445 PIPE_BIND_SAMPLER_VIEW
, FALSE
);
446 assert(pipeFormat
!= PIPE_FORMAT_NONE
);
449 mformat
= st_pipe_format_to_mesa_format(pipeFormat
);
450 baseInternalFormat
= _mesa_get_format_base_format(mformat
);
452 pixels
= _mesa_map_pbo_source(ctx
, unpack
, pixels
);
456 /* alloc temporary texture */
457 pt
= alloc_texture(st
, width
, height
, pipeFormat
, PIPE_BIND_SAMPLER_VIEW
);
459 _mesa_unmap_pbo_source(ctx
, unpack
);
464 struct pipe_transfer
*transfer
;
467 const GLbitfield imageTransferStateSave
= ctx
->_ImageTransferState
;
469 /* we'll do pixel transfer in a fragment shader */
470 ctx
->_ImageTransferState
= 0x0;
472 /* map texture transfer */
473 dest
= pipe_transfer_map(pipe
, pt
, 0, 0,
474 PIPE_TRANSFER_WRITE
, 0, 0,
475 width
, height
, &transfer
);
478 /* Put image into texture transfer.
479 * Note that the image is actually going to be upside down in
480 * the texture. We deal with that with texcoords.
482 if ((format
== GL_RGBA
|| format
== GL_BGRA
)
483 && type
== GL_UNSIGNED_BYTE
) {
484 /* Use a memcpy-based texstore to avoid software pixel swizzling.
485 * We'll do the necessary swizzling with the pipe_sampler_view to
486 * give much better performance.
487 * XXX in the future, expand this to accomodate more format and
490 _mesa_memcpy_texture(ctx
, 2,
491 mformat
, /* mesa_format */
492 transfer
->stride
, /* dstRowStride, bytes */
493 &dest
, /* destSlices */
494 width
, height
, 1, /* size */
495 format
, type
, /* src format/type */
496 pixels
, /* data source */
501 success
= _mesa_texstore(ctx
, 2, /* dims */
502 baseInternalFormat
, /* baseInternalFormat */
503 mformat
, /* mesa_format */
504 transfer
->stride
, /* dstRowStride, bytes */
505 &dest
, /* destSlices */
506 width
, height
, 1, /* size */
507 format
, type
, /* src format/type */
508 pixels
, /* data source */
513 pipe_transfer_unmap(pipe
, transfer
);
518 ctx
->_ImageTransferState
= imageTransferStateSave
;
521 _mesa_unmap_pbo_source(ctx
, unpack
);
523 #if USE_DRAWPIXELS_CACHE
524 /* Save the glDrawPixels parameter and image in the cache */
525 if ((unpack
->RowLength
== 0 || unpack
->RowLength
== width
) &&
526 unpack
->SkipPixels
== 0 &&
527 unpack
->SkipRows
== 0) {
528 st
->drawpix_cache
.width
= width
;
529 st
->drawpix_cache
.height
= height
;
530 st
->drawpix_cache
.format
= format
;
531 st
->drawpix_cache
.type
= type
;
532 st
->drawpix_cache
.user_pointer
= pixels
;
533 assert(!st
->drawpix_cache
.image
);
534 st
->drawpix_cache
.image
= malloc(width
* height
* bpp
);
535 if (st
->drawpix_cache
.image
) {
536 memcpy(st
->drawpix_cache
.image
, pixels
, width
* height
* bpp
);
537 pipe_resource_reference(&st
->drawpix_cache
.texture
, pt
);
540 /* out of memory, free/disable cached texture */
541 st
->drawpix_cache
.width
= 0;
542 st
->drawpix_cache
.height
= 0;
543 pipe_resource_reference(&st
->drawpix_cache
.texture
, NULL
);
553 draw_textured_quad(struct gl_context
*ctx
, GLint x
, GLint y
, GLfloat z
,
554 GLsizei width
, GLsizei height
,
555 GLfloat zoomX
, GLfloat zoomY
,
556 struct pipe_sampler_view
**sv
,
557 int num_sampler_view
,
560 struct st_fp_variant
*fpv
,
561 const GLfloat
*color
,
563 GLboolean write_depth
, GLboolean write_stencil
)
565 struct st_context
*st
= st_context(ctx
);
566 struct pipe_context
*pipe
= st
->pipe
;
567 struct cso_context
*cso
= st
->cso_context
;
568 const unsigned fb_width
= _mesa_geometric_width(ctx
->DrawBuffer
);
569 const unsigned fb_height
= _mesa_geometric_height(ctx
->DrawBuffer
);
570 GLfloat x0
, y0
, x1
, y1
;
572 boolean normalized
= sv
[0]->texture
->target
== PIPE_TEXTURE_2D
;
573 unsigned cso_state_mask
;
575 assert(sv
[0]->texture
->target
== st
->internal_target
);
578 /* XXX if DrawPixels image is larger than max texture size, break
581 maxSize
= 1 << (pipe
->screen
->get_param(pipe
->screen
,
582 PIPE_CAP_MAX_TEXTURE_2D_LEVELS
) - 1);
583 assert(width
<= maxSize
);
584 assert(height
<= maxSize
);
586 cso_state_mask
= (CSO_BIT_RASTERIZER
|
588 CSO_BIT_FRAGMENT_SAMPLERS
|
589 CSO_BIT_FRAGMENT_SAMPLER_VIEWS
|
590 CSO_BIT_STREAM_OUTPUTS
|
591 CSO_BIT_VERTEX_ELEMENTS
|
592 CSO_BIT_AUX_VERTEX_BUFFER_SLOT
|
593 CSO_BITS_ALL_SHADERS
);
595 cso_state_mask
|= (CSO_BIT_DEPTH_STENCIL_ALPHA
|
598 cso_save_state(cso
, cso_state_mask
);
600 /* rasterizer state: just scissor */
602 struct pipe_rasterizer_state rasterizer
;
603 memset(&rasterizer
, 0, sizeof(rasterizer
));
604 rasterizer
.clamp_fragment_color
= !st
->clamp_frag_color_in_shader
&&
605 ctx
->Color
._ClampFragmentColor
;
606 rasterizer
.half_pixel_center
= 1;
607 rasterizer
.bottom_edge_rule
= 1;
608 rasterizer
.depth_clip
= !ctx
->Transform
.DepthClamp
;
609 rasterizer
.scissor
= ctx
->Scissor
.EnableFlags
;
610 cso_set_rasterizer(cso
, &rasterizer
);
614 /* Stencil writing bypasses the normal fragment pipeline to
615 * disable color writing and set stencil test to always pass.
617 struct pipe_depth_stencil_alpha_state dsa
;
618 struct pipe_blend_state blend
;
621 memset(&dsa
, 0, sizeof(dsa
));
622 dsa
.stencil
[0].enabled
= 1;
623 dsa
.stencil
[0].func
= PIPE_FUNC_ALWAYS
;
624 dsa
.stencil
[0].writemask
= ctx
->Stencil
.WriteMask
[0] & 0xff;
625 dsa
.stencil
[0].zpass_op
= PIPE_STENCIL_OP_REPLACE
;
627 /* writing depth+stencil: depth test always passes */
628 dsa
.depth
.enabled
= 1;
629 dsa
.depth
.writemask
= ctx
->Depth
.Mask
;
630 dsa
.depth
.func
= PIPE_FUNC_ALWAYS
;
632 cso_set_depth_stencil_alpha(cso
, &dsa
);
634 /* blend (colormask) */
635 memset(&blend
, 0, sizeof(blend
));
636 cso_set_blend(cso
, &blend
);
639 /* fragment shader state: TEX lookup program */
640 cso_set_fragment_shader_handle(cso
, driver_fp
);
642 /* vertex shader state: position + texcoord pass-through */
643 cso_set_vertex_shader_handle(cso
, driver_vp
);
645 /* disable other shaders */
646 cso_set_tessctrl_shader_handle(cso
, NULL
);
647 cso_set_tesseval_shader_handle(cso
, NULL
);
648 cso_set_geometry_shader_handle(cso
, NULL
);
650 /* user samplers, plus the drawpix samplers */
652 struct pipe_sampler_state sampler
;
654 memset(&sampler
, 0, sizeof(sampler
));
655 sampler
.wrap_s
= PIPE_TEX_WRAP_CLAMP
;
656 sampler
.wrap_t
= PIPE_TEX_WRAP_CLAMP
;
657 sampler
.wrap_r
= PIPE_TEX_WRAP_CLAMP
;
658 sampler
.min_img_filter
= PIPE_TEX_FILTER_NEAREST
;
659 sampler
.min_mip_filter
= PIPE_TEX_MIPFILTER_NONE
;
660 sampler
.mag_img_filter
= PIPE_TEX_FILTER_NEAREST
;
661 sampler
.normalized_coords
= normalized
;
664 /* drawing a color image */
665 const struct pipe_sampler_state
*samplers
[PIPE_MAX_SAMPLERS
];
666 uint num
= MAX3(fpv
->drawpix_sampler
+ 1,
667 fpv
->pixelmap_sampler
+ 1,
668 st
->state
.num_samplers
[PIPE_SHADER_FRAGMENT
]);
671 for (i
= 0; i
< st
->state
.num_samplers
[PIPE_SHADER_FRAGMENT
]; i
++)
672 samplers
[i
] = &st
->state
.samplers
[PIPE_SHADER_FRAGMENT
][i
];
674 samplers
[fpv
->drawpix_sampler
] = &sampler
;
676 samplers
[fpv
->pixelmap_sampler
] = &sampler
;
678 cso_set_samplers(cso
, PIPE_SHADER_FRAGMENT
, num
, samplers
);
680 /* drawing a depth/stencil image */
681 const struct pipe_sampler_state
*samplers
[2] = {&sampler
, &sampler
};
683 cso_set_samplers(cso
, PIPE_SHADER_FRAGMENT
, num_sampler_view
, samplers
);
687 /* user textures, plus the drawpix textures */
689 /* drawing a color image */
690 struct pipe_sampler_view
*sampler_views
[PIPE_MAX_SAMPLERS
];
691 uint num
= MAX3(fpv
->drawpix_sampler
+ 1,
692 fpv
->pixelmap_sampler
+ 1,
693 st
->state
.num_sampler_views
[PIPE_SHADER_FRAGMENT
]);
695 memcpy(sampler_views
, st
->state
.sampler_views
[PIPE_SHADER_FRAGMENT
],
696 sizeof(sampler_views
));
698 sampler_views
[fpv
->drawpix_sampler
] = sv
[0];
700 sampler_views
[fpv
->pixelmap_sampler
] = sv
[1];
701 cso_set_sampler_views(cso
, PIPE_SHADER_FRAGMENT
, num
, sampler_views
);
703 /* drawing a depth/stencil image */
704 cso_set_sampler_views(cso
, PIPE_SHADER_FRAGMENT
, num_sampler_view
, sv
);
707 /* viewport state: viewport matching window dims */
708 cso_set_viewport_dims(cso
, fb_width
, fb_height
, TRUE
);
710 cso_set_vertex_elements(cso
, 3, st
->util_velems
);
711 cso_set_stream_outputs(cso
, 0, NULL
, NULL
);
713 /* Compute Gallium window coords (y=0=top) with pixel zoom.
714 * Recall that these coords are transformed by the current
715 * vertex shader and viewport transformation.
717 if (st_fb_orientation(ctx
->DrawBuffer
) == Y_0_BOTTOM
) {
718 y
= fb_height
- (int) (y
+ height
* ctx
->Pixel
.ZoomY
);
719 invertTex
= !invertTex
;
723 x1
= x
+ width
* ctx
->Pixel
.ZoomX
;
725 y1
= y
+ height
* ctx
->Pixel
.ZoomY
;
727 /* convert Z from [0,1] to [-1,-1] to match viewport Z scale/bias */
731 const float clip_x0
= x0
/ (float) fb_width
* 2.0f
- 1.0f
;
732 const float clip_y0
= y0
/ (float) fb_height
* 2.0f
- 1.0f
;
733 const float clip_x1
= x1
/ (float) fb_width
* 2.0f
- 1.0f
;
734 const float clip_y1
= y1
/ (float) fb_height
* 2.0f
- 1.0f
;
735 const float maxXcoord
= normalized
?
736 ((float) width
/ sv
[0]->texture
->width0
) : (float) width
;
737 const float maxYcoord
= normalized
738 ? ((float) height
/ sv
[0]->texture
->height0
) : (float) height
;
739 const float sLeft
= 0.0f
, sRight
= maxXcoord
;
740 const float tTop
= invertTex
? maxYcoord
: 0.0f
;
741 const float tBot
= invertTex
? 0.0f
: maxYcoord
;
743 if (!st_draw_quad(st
, clip_x0
, clip_y0
, clip_x1
, clip_y1
, z
,
744 sLeft
, tBot
, sRight
, tTop
, color
, 0)) {
745 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glDrawPixels");
750 cso_restore_state(cso
);
755 * Software fallback to do glDrawPixels(GL_STENCIL_INDEX) when we
756 * can't use a fragment shader to write stencil values.
759 draw_stencil_pixels(struct gl_context
*ctx
, GLint x
, GLint y
,
760 GLsizei width
, GLsizei height
, GLenum format
, GLenum type
,
761 const struct gl_pixelstore_attrib
*unpack
,
764 struct st_context
*st
= st_context(ctx
);
765 struct pipe_context
*pipe
= st
->pipe
;
766 struct st_renderbuffer
*strb
;
767 enum pipe_transfer_usage usage
;
768 struct pipe_transfer
*pt
;
769 const GLboolean zoom
= ctx
->Pixel
.ZoomX
!= 1.0 || ctx
->Pixel
.ZoomY
!= 1.0;
771 struct gl_pixelstore_attrib clippedUnpack
= *unpack
;
776 if (!_mesa_clip_drawpixels(ctx
, &x
, &y
, &width
, &height
,
778 /* totally clipped */
783 strb
= st_renderbuffer(ctx
->DrawBuffer
->
784 Attachment
[BUFFER_STENCIL
].Renderbuffer
);
786 if (st_fb_orientation(ctx
->DrawBuffer
) == Y_0_TOP
) {
787 y
= ctx
->DrawBuffer
->Height
- y
- height
;
790 if (format
== GL_STENCIL_INDEX
&&
791 _mesa_is_format_packed_depth_stencil(strb
->Base
.Format
)) {
792 /* writing stencil to a combined depth+stencil buffer */
793 usage
= PIPE_TRANSFER_READ_WRITE
;
796 usage
= PIPE_TRANSFER_WRITE
;
799 stmap
= pipe_transfer_map(pipe
, strb
->texture
,
800 strb
->surface
->u
.tex
.level
,
801 strb
->surface
->u
.tex
.first_layer
,
805 pixels
= _mesa_map_pbo_source(ctx
, &clippedUnpack
, pixels
);
808 sValues
= malloc(width
* sizeof(GLubyte
));
809 zValues
= malloc(width
* sizeof(GLuint
));
811 if (sValues
&& zValues
) {
813 for (row
= 0; row
< height
; row
++) {
814 GLfloat
*zValuesFloat
= (GLfloat
*)zValues
;
815 GLenum destType
= GL_UNSIGNED_BYTE
;
816 const void *source
= _mesa_image_address2d(&clippedUnpack
, pixels
,
820 _mesa_unpack_stencil_span(ctx
, width
, destType
, sValues
,
821 type
, source
, &clippedUnpack
,
822 ctx
->_ImageTransferState
);
824 if (format
== GL_DEPTH_STENCIL
) {
826 pt
->resource
->format
== PIPE_FORMAT_Z32_FLOAT_S8X24_UINT
?
827 GL_FLOAT
: GL_UNSIGNED_INT
;
829 _mesa_unpack_depth_span(ctx
, width
, ztype
, zValues
,
830 (1 << 24) - 1, type
, source
,
835 _mesa_problem(ctx
, "Gallium glDrawPixels(GL_STENCIL) with "
836 "zoom not complete");
842 if (st_fb_orientation(ctx
->DrawBuffer
) == Y_0_TOP
) {
843 spanY
= height
- row
- 1;
849 /* now pack the stencil (and Z) values in the dest format */
850 switch (pt
->resource
->format
) {
851 case PIPE_FORMAT_S8_UINT
:
853 ubyte
*dest
= stmap
+ spanY
* pt
->stride
;
854 assert(usage
== PIPE_TRANSFER_WRITE
);
855 memcpy(dest
, sValues
, width
);
858 case PIPE_FORMAT_Z24_UNORM_S8_UINT
:
859 if (format
== GL_DEPTH_STENCIL
) {
860 uint
*dest
= (uint
*) (stmap
+ spanY
* pt
->stride
);
862 assert(usage
== PIPE_TRANSFER_WRITE
);
863 for (k
= 0; k
< width
; k
++) {
864 dest
[k
] = zValues
[k
] | (sValues
[k
] << 24);
868 uint
*dest
= (uint
*) (stmap
+ spanY
* pt
->stride
);
870 assert(usage
== PIPE_TRANSFER_READ_WRITE
);
871 for (k
= 0; k
< width
; k
++) {
872 dest
[k
] = (dest
[k
] & 0xffffff) | (sValues
[k
] << 24);
876 case PIPE_FORMAT_S8_UINT_Z24_UNORM
:
877 if (format
== GL_DEPTH_STENCIL
) {
878 uint
*dest
= (uint
*) (stmap
+ spanY
* pt
->stride
);
880 assert(usage
== PIPE_TRANSFER_WRITE
);
881 for (k
= 0; k
< width
; k
++) {
882 dest
[k
] = (zValues
[k
] << 8) | (sValues
[k
] & 0xff);
886 uint
*dest
= (uint
*) (stmap
+ spanY
* pt
->stride
);
888 assert(usage
== PIPE_TRANSFER_READ_WRITE
);
889 for (k
= 0; k
< width
; k
++) {
890 dest
[k
] = (dest
[k
] & 0xffffff00) | (sValues
[k
] & 0xff);
894 case PIPE_FORMAT_Z32_FLOAT_S8X24_UINT
:
895 if (format
== GL_DEPTH_STENCIL
) {
896 uint
*dest
= (uint
*) (stmap
+ spanY
* pt
->stride
);
897 GLfloat
*destf
= (GLfloat
*)dest
;
899 assert(usage
== PIPE_TRANSFER_WRITE
);
900 for (k
= 0; k
< width
; k
++) {
901 destf
[k
*2] = zValuesFloat
[k
];
902 dest
[k
*2+1] = sValues
[k
] & 0xff;
906 uint
*dest
= (uint
*) (stmap
+ spanY
* pt
->stride
);
908 assert(usage
== PIPE_TRANSFER_READ_WRITE
);
909 for (k
= 0; k
< width
; k
++) {
910 dest
[k
*2+1] = sValues
[k
] & 0xff;
921 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glDrawPixels()");
927 _mesa_unmap_pbo_source(ctx
, &clippedUnpack
);
929 /* unmap the stencil buffer */
930 pipe_transfer_unmap(pipe
, pt
);
935 * Get fragment program variant for a glDrawPixels or glCopyPixels
936 * command for RGBA data.
938 static struct st_fp_variant
*
939 get_color_fp_variant(struct st_context
*st
)
941 struct gl_context
*ctx
= st
->ctx
;
942 struct st_fp_variant_key key
;
943 struct st_fp_variant
*fpv
;
945 memset(&key
, 0, sizeof(key
));
947 key
.st
= st
->has_shareable_shaders
? NULL
: st
;
949 key
.scaleAndBias
= (ctx
->Pixel
.RedBias
!= 0.0 ||
950 ctx
->Pixel
.RedScale
!= 1.0 ||
951 ctx
->Pixel
.GreenBias
!= 0.0 ||
952 ctx
->Pixel
.GreenScale
!= 1.0 ||
953 ctx
->Pixel
.BlueBias
!= 0.0 ||
954 ctx
->Pixel
.BlueScale
!= 1.0 ||
955 ctx
->Pixel
.AlphaBias
!= 0.0 ||
956 ctx
->Pixel
.AlphaScale
!= 1.0);
957 key
.pixelMaps
= ctx
->Pixel
.MapColorFlag
;
958 key
.clamp_color
= st
->clamp_frag_color_in_shader
&&
959 ctx
->Color
._ClampFragmentColor
;
961 fpv
= st_get_fp_variant(st
, st
->fp
, &key
);
968 * Clamp glDrawPixels width and height to the maximum texture size.
971 clamp_size(struct pipe_context
*pipe
, GLsizei
*width
, GLsizei
*height
,
972 struct gl_pixelstore_attrib
*unpack
)
975 1 << (pipe
->screen
->get_param(pipe
->screen
,
976 PIPE_CAP_MAX_TEXTURE_2D_LEVELS
) - 1);
978 if (*width
> maxSize
) {
979 if (unpack
->RowLength
== 0)
980 unpack
->RowLength
= *width
;
983 if (*height
> maxSize
) {
990 * Search the array of 4 swizzle components for the named component and return
994 search_swizzle(const unsigned char swizzle
[4], unsigned component
)
997 for (i
= 0; i
< 4; i
++) {
998 if (swizzle
[i
] == component
)
1001 assert(!"search_swizzle() failed");
1007 * Set the sampler view's swizzle terms. This is used to handle RGBA
1008 * swizzling when the incoming image format isn't an exact match for
1009 * the actual texture format. For example, if we have glDrawPixels(
1010 * GL_RGBA, GL_UNSIGNED_BYTE) and we chose the texture format
1011 * PIPE_FORMAT_B8G8R8A8 then we can do use the sampler view swizzle to
1012 * avoid swizzling all the pixels in software in the texstore code.
1015 setup_sampler_swizzle(struct pipe_sampler_view
*sv
, GLenum format
, GLenum type
)
1017 if ((format
== GL_RGBA
|| format
== GL_BGRA
) && type
== GL_UNSIGNED_BYTE
) {
1018 const struct util_format_description
*desc
=
1019 util_format_description(sv
->texture
->format
);
1020 unsigned c0
, c1
, c2
, c3
;
1022 /* Every gallium driver supports at least one 32-bit packed RGBA format.
1023 * We must have chosen one for (GL_RGBA, GL_UNSIGNED_BYTE).
1025 assert(desc
->block
.bits
== 32);
1027 /* invert the format's swizzle to setup the sampler's swizzle */
1028 if (format
== GL_RGBA
) {
1029 c0
= PIPE_SWIZZLE_X
;
1030 c1
= PIPE_SWIZZLE_Y
;
1031 c2
= PIPE_SWIZZLE_Z
;
1032 c3
= PIPE_SWIZZLE_W
;
1035 assert(format
== GL_BGRA
);
1036 c0
= PIPE_SWIZZLE_Z
;
1037 c1
= PIPE_SWIZZLE_Y
;
1038 c2
= PIPE_SWIZZLE_X
;
1039 c3
= PIPE_SWIZZLE_W
;
1041 sv
->swizzle_r
= search_swizzle(desc
->swizzle
, c0
);
1042 sv
->swizzle_g
= search_swizzle(desc
->swizzle
, c1
);
1043 sv
->swizzle_b
= search_swizzle(desc
->swizzle
, c2
);
1044 sv
->swizzle_a
= search_swizzle(desc
->swizzle
, c3
);
1047 /* use the default sampler swizzle */
1053 * Called via ctx->Driver.DrawPixels()
1056 st_DrawPixels(struct gl_context
*ctx
, GLint x
, GLint y
,
1057 GLsizei width
, GLsizei height
,
1058 GLenum format
, GLenum type
,
1059 const struct gl_pixelstore_attrib
*unpack
, const void *pixels
)
1061 void *driver_vp
, *driver_fp
;
1062 struct st_context
*st
= st_context(ctx
);
1063 struct pipe_context
*pipe
= st
->pipe
;
1064 GLboolean write_stencil
= GL_FALSE
, write_depth
= GL_FALSE
;
1065 struct pipe_sampler_view
*sv
[2] = { NULL
};
1066 int num_sampler_view
= 1;
1067 struct gl_pixelstore_attrib clippedUnpack
;
1068 struct st_fp_variant
*fpv
= NULL
;
1069 struct pipe_resource
*pt
;
1071 /* Mesa state should be up to date by now */
1072 assert(ctx
->NewState
== 0x0);
1074 st_flush_bitmap_cache(st
);
1075 st_invalidate_readpix_cache(st
);
1077 st_validate_state(st
, ST_PIPELINE_RENDER
);
1079 /* Limit the size of the glDrawPixels to the max texture size.
1080 * Strictly speaking, that's not correct but since we don't handle
1081 * larger images yet, this is better than crashing.
1083 clippedUnpack
= *unpack
;
1084 unpack
= &clippedUnpack
;
1085 clamp_size(st
->pipe
, &width
, &height
, &clippedUnpack
);
1087 if (format
== GL_DEPTH_STENCIL
)
1088 write_stencil
= write_depth
= GL_TRUE
;
1089 else if (format
== GL_STENCIL_INDEX
)
1090 write_stencil
= GL_TRUE
;
1091 else if (format
== GL_DEPTH_COMPONENT
)
1092 write_depth
= GL_TRUE
;
1094 if (write_stencil
&&
1095 !pipe
->screen
->get_param(pipe
->screen
, PIPE_CAP_SHADER_STENCIL_EXPORT
)) {
1096 /* software fallback */
1097 draw_stencil_pixels(ctx
, x
, y
, width
, height
, format
, type
,
1103 * Get vertex/fragment shaders
1105 if (write_depth
|| write_stencil
) {
1106 driver_fp
= get_drawpix_z_stencil_program(st
, write_depth
,
1108 driver_vp
= make_passthrough_vertex_shader(st
, GL_TRUE
);
1111 fpv
= get_color_fp_variant(st
);
1113 driver_fp
= fpv
->driver_shader
;
1114 driver_vp
= make_passthrough_vertex_shader(st
, GL_FALSE
);
1116 if (ctx
->Pixel
.MapColorFlag
) {
1117 pipe_sampler_view_reference(&sv
[1],
1118 st
->pixel_xfer
.pixelmap_sampler_view
);
1122 /* compiling a new fragment shader variant added new state constants
1123 * into the constant buffer, we need to update them
1125 st_upload_constants(st
, st
->fp
->Base
.Base
.Parameters
,
1126 MESA_SHADER_FRAGMENT
);
1129 /* Put glDrawPixels image into a texture */
1130 pt
= make_texture(st
, width
, height
, format
, type
, unpack
, pixels
);
1132 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glDrawPixels");
1136 /* create sampler view for the image */
1137 sv
[0] = st_create_texture_sampler_view(st
->pipe
, pt
);
1139 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glDrawPixels");
1140 pipe_resource_reference(&pt
, NULL
);
1144 /* Set up the sampler view's swizzle */
1145 setup_sampler_swizzle(sv
[0], format
, type
);
1147 /* Create a second sampler view to read stencil. The stencil is
1148 * written using the shader stencil export functionality.
1150 if (write_stencil
) {
1151 enum pipe_format stencil_format
=
1152 util_format_stencil_only(pt
->format
);
1153 /* we should not be doing pixel map/transfer (see above) */
1154 assert(num_sampler_view
== 1);
1155 sv
[1] = st_create_texture_sampler_view_format(st
->pipe
, pt
,
1158 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glDrawPixels");
1159 pipe_resource_reference(&pt
, NULL
);
1160 pipe_sampler_view_reference(&sv
[0], NULL
);
1166 draw_textured_quad(ctx
, x
, y
, ctx
->Current
.RasterPos
[2],
1168 ctx
->Pixel
.ZoomX
, ctx
->Pixel
.ZoomY
,
1173 ctx
->Current
.RasterColor
,
1174 GL_FALSE
, write_depth
, write_stencil
);
1175 pipe_sampler_view_reference(&sv
[0], NULL
);
1176 if (num_sampler_view
> 1)
1177 pipe_sampler_view_reference(&sv
[1], NULL
);
1179 /* free the texture (but may persist in the cache) */
1180 pipe_resource_reference(&pt
, NULL
);
1186 * Software fallback for glCopyPixels(GL_STENCIL).
1189 copy_stencil_pixels(struct gl_context
*ctx
, GLint srcx
, GLint srcy
,
1190 GLsizei width
, GLsizei height
,
1191 GLint dstx
, GLint dsty
)
1193 struct st_renderbuffer
*rbDraw
;
1194 struct pipe_context
*pipe
= st_context(ctx
)->pipe
;
1195 enum pipe_transfer_usage usage
;
1196 struct pipe_transfer
*ptDraw
;
1201 buffer
= malloc(width
* height
* sizeof(ubyte
));
1203 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glCopyPixels(stencil)");
1207 /* Get the dest renderbuffer */
1208 rbDraw
= st_renderbuffer(ctx
->DrawBuffer
->
1209 Attachment
[BUFFER_STENCIL
].Renderbuffer
);
1211 /* this will do stencil pixel transfer ops */
1212 _mesa_readpixels(ctx
, srcx
, srcy
, width
, height
,
1213 GL_STENCIL_INDEX
, GL_UNSIGNED_BYTE
,
1214 &ctx
->DefaultPacking
, buffer
);
1217 /* debug code: dump stencil values */
1219 for (row
= 0; row
< height
; row
++) {
1220 printf("%3d: ", row
);
1221 for (col
= 0; col
< width
; col
++) {
1222 printf("%02x ", buffer
[col
+ row
* width
]);
1228 if (_mesa_is_format_packed_depth_stencil(rbDraw
->Base
.Format
))
1229 usage
= PIPE_TRANSFER_READ_WRITE
;
1231 usage
= PIPE_TRANSFER_WRITE
;
1233 if (st_fb_orientation(ctx
->DrawBuffer
) == Y_0_TOP
) {
1234 dsty
= rbDraw
->Base
.Height
- dsty
- height
;
1237 assert(util_format_get_blockwidth(rbDraw
->texture
->format
) == 1);
1238 assert(util_format_get_blockheight(rbDraw
->texture
->format
) == 1);
1240 /* map the stencil buffer */
1241 drawMap
= pipe_transfer_map(pipe
,
1243 rbDraw
->surface
->u
.tex
.level
,
1244 rbDraw
->surface
->u
.tex
.first_layer
,
1246 width
, height
, &ptDraw
);
1249 /* XXX PixelZoom not handled yet */
1250 for (i
= 0; i
< height
; i
++) {
1257 if (st_fb_orientation(ctx
->DrawBuffer
) == Y_0_TOP
) {
1261 dst
= drawMap
+ y
* ptDraw
->stride
;
1262 src
= buffer
+ i
* width
;
1264 _mesa_pack_ubyte_stencil_row(rbDraw
->Base
.Format
, width
, src
, dst
);
1269 /* unmap the stencil buffer */
1270 pipe_transfer_unmap(pipe
, ptDraw
);
1275 * Return renderbuffer to use for reading color pixels for glCopyPixels
1277 static struct st_renderbuffer
*
1278 st_get_color_read_renderbuffer(struct gl_context
*ctx
)
1280 struct gl_framebuffer
*fb
= ctx
->ReadBuffer
;
1281 struct st_renderbuffer
*strb
=
1282 st_renderbuffer(fb
->_ColorReadBuffer
);
1289 * Try to do a glCopyPixels for simple cases with a blit by calling
1292 * We can do this when we're copying color pixels (depth/stencil
1293 * eventually) with no pixel zoom, no pixel transfer ops, no
1294 * per-fragment ops, and the src/dest regions don't overlap.
1297 blit_copy_pixels(struct gl_context
*ctx
, GLint srcx
, GLint srcy
,
1298 GLsizei width
, GLsizei height
,
1299 GLint dstx
, GLint dsty
, GLenum type
)
1301 struct st_context
*st
= st_context(ctx
);
1302 struct pipe_context
*pipe
= st
->pipe
;
1303 struct pipe_screen
*screen
= pipe
->screen
;
1304 struct gl_pixelstore_attrib pack
, unpack
;
1305 GLint readX
, readY
, readW
, readH
, drawX
, drawY
, drawW
, drawH
;
1307 if (type
== GL_COLOR
&&
1308 ctx
->Pixel
.ZoomX
== 1.0 &&
1309 ctx
->Pixel
.ZoomY
== 1.0 &&
1310 ctx
->_ImageTransferState
== 0x0 &&
1311 !ctx
->Color
.BlendEnabled
&&
1312 !ctx
->Color
.AlphaEnabled
&&
1313 (!ctx
->Color
.ColorLogicOpEnabled
|| ctx
->Color
.LogicOp
== GL_COPY
) &&
1315 !ctx
->Fog
.Enabled
&&
1316 !ctx
->Stencil
.Enabled
&&
1317 !ctx
->FragmentProgram
.Enabled
&&
1318 !ctx
->VertexProgram
.Enabled
&&
1319 !ctx
->_Shader
->CurrentProgram
[MESA_SHADER_FRAGMENT
] &&
1320 !ctx
->ATIFragmentShader
._Enabled
&&
1321 ctx
->DrawBuffer
->_NumColorDrawBuffers
== 1 &&
1322 !ctx
->Query
.CondRenderQuery
&&
1323 !ctx
->Query
.CurrentOcclusionObject
) {
1324 struct st_renderbuffer
*rbRead
, *rbDraw
;
1327 * Clip the read region against the src buffer bounds.
1328 * We'll still allocate a temporary buffer/texture for the original
1329 * src region size but we'll only read the region which is on-screen.
1330 * This may mean that we draw garbage pixels into the dest region, but
1337 pack
= ctx
->DefaultPacking
;
1338 if (!_mesa_clip_readpixels(ctx
, &readX
, &readY
, &readW
, &readH
, &pack
))
1339 return GL_TRUE
; /* all done */
1341 /* clip against dest buffer bounds and scissor box */
1342 drawX
= dstx
+ pack
.SkipPixels
;
1343 drawY
= dsty
+ pack
.SkipRows
;
1345 if (!_mesa_clip_drawpixels(ctx
, &drawX
, &drawY
, &readW
, &readH
, &unpack
))
1346 return GL_TRUE
; /* all done */
1348 readX
= readX
- pack
.SkipPixels
+ unpack
.SkipPixels
;
1349 readY
= readY
- pack
.SkipRows
+ unpack
.SkipRows
;
1354 rbRead
= st_get_color_read_renderbuffer(ctx
);
1355 rbDraw
= st_renderbuffer(ctx
->DrawBuffer
->_ColorDrawBuffers
[0]);
1357 /* Flip src/dst position depending on the orientation of buffers. */
1358 if (st_fb_orientation(ctx
->ReadBuffer
) == Y_0_TOP
) {
1359 readY
= rbRead
->Base
.Height
- readY
;
1363 if (st_fb_orientation(ctx
->DrawBuffer
) == Y_0_TOP
) {
1364 /* We can't flip the destination for pipe->blit, so we only adjust
1365 * its position and flip the source.
1367 drawY
= rbDraw
->Base
.Height
- drawY
- drawH
;
1372 if (rbRead
!= rbDraw
||
1373 !_mesa_regions_overlap(readX
, readY
, readX
+ readW
, readY
+ readH
,
1374 drawX
, drawY
, drawX
+ drawW
, drawY
+ drawH
)) {
1375 struct pipe_blit_info blit
;
1377 memset(&blit
, 0, sizeof(blit
));
1378 blit
.src
.resource
= rbRead
->texture
;
1379 blit
.src
.level
= rbRead
->surface
->u
.tex
.level
;
1380 blit
.src
.format
= rbRead
->texture
->format
;
1381 blit
.src
.box
.x
= readX
;
1382 blit
.src
.box
.y
= readY
;
1383 blit
.src
.box
.z
= rbRead
->surface
->u
.tex
.first_layer
;
1384 blit
.src
.box
.width
= readW
;
1385 blit
.src
.box
.height
= readH
;
1386 blit
.src
.box
.depth
= 1;
1387 blit
.dst
.resource
= rbDraw
->texture
;
1388 blit
.dst
.level
= rbDraw
->surface
->u
.tex
.level
;
1389 blit
.dst
.format
= rbDraw
->texture
->format
;
1390 blit
.dst
.box
.x
= drawX
;
1391 blit
.dst
.box
.y
= drawY
;
1392 blit
.dst
.box
.z
= rbDraw
->surface
->u
.tex
.first_layer
;
1393 blit
.dst
.box
.width
= drawW
;
1394 blit
.dst
.box
.height
= drawH
;
1395 blit
.dst
.box
.depth
= 1;
1396 blit
.mask
= PIPE_MASK_RGBA
;
1397 blit
.filter
= PIPE_TEX_FILTER_NEAREST
;
1399 if (ctx
->DrawBuffer
!= ctx
->WinSysDrawBuffer
)
1400 st_window_rectangles_to_blit(ctx
, &blit
);
1402 if (screen
->is_format_supported(screen
, blit
.src
.format
,
1403 blit
.src
.resource
->target
,
1404 blit
.src
.resource
->nr_samples
,
1405 PIPE_BIND_SAMPLER_VIEW
) &&
1406 screen
->is_format_supported(screen
, blit
.dst
.format
,
1407 blit
.dst
.resource
->target
,
1408 blit
.dst
.resource
->nr_samples
,
1409 PIPE_BIND_RENDER_TARGET
)) {
1410 pipe
->blit(pipe
, &blit
);
1421 st_CopyPixels(struct gl_context
*ctx
, GLint srcx
, GLint srcy
,
1422 GLsizei width
, GLsizei height
,
1423 GLint dstx
, GLint dsty
, GLenum type
)
1425 struct st_context
*st
= st_context(ctx
);
1426 struct pipe_context
*pipe
= st
->pipe
;
1427 struct pipe_screen
*screen
= pipe
->screen
;
1428 struct st_renderbuffer
*rbRead
;
1429 void *driver_vp
, *driver_fp
;
1430 struct pipe_resource
*pt
;
1431 struct pipe_sampler_view
*sv
[2] = { NULL
};
1432 struct st_fp_variant
*fpv
= NULL
;
1433 int num_sampler_view
= 1;
1434 enum pipe_format srcFormat
;
1436 GLboolean invertTex
= GL_FALSE
;
1437 GLint readX
, readY
, readW
, readH
;
1438 struct gl_pixelstore_attrib pack
= ctx
->DefaultPacking
;
1440 st_flush_bitmap_cache(st
);
1441 st_invalidate_readpix_cache(st
);
1443 st_validate_state(st
, ST_PIPELINE_RENDER
);
1445 if (type
== GL_DEPTH_STENCIL
) {
1446 /* XXX make this more efficient */
1447 st_CopyPixels(ctx
, srcx
, srcy
, width
, height
, dstx
, dsty
, GL_STENCIL
);
1448 st_CopyPixels(ctx
, srcx
, srcy
, width
, height
, dstx
, dsty
, GL_DEPTH
);
1452 if (type
== GL_STENCIL
) {
1453 /* can't use texturing to do stencil */
1454 copy_stencil_pixels(ctx
, srcx
, srcy
, width
, height
, dstx
, dsty
);
1458 if (blit_copy_pixels(ctx
, srcx
, srcy
, width
, height
, dstx
, dsty
, type
))
1462 * The subsequent code implements glCopyPixels by copying the source
1463 * pixels into a temporary texture that's then applied to a textured quad.
1464 * When we draw the textured quad, all the usual per-fragment operations
1470 * Get vertex/fragment shaders
1472 if (type
== GL_COLOR
) {
1473 fpv
= get_color_fp_variant(st
);
1475 rbRead
= st_get_color_read_renderbuffer(ctx
);
1477 driver_fp
= fpv
->driver_shader
;
1478 driver_vp
= make_passthrough_vertex_shader(st
, GL_FALSE
);
1480 if (ctx
->Pixel
.MapColorFlag
) {
1481 pipe_sampler_view_reference(&sv
[1],
1482 st
->pixel_xfer
.pixelmap_sampler_view
);
1486 /* compiling a new fragment shader variant added new state constants
1487 * into the constant buffer, we need to update them
1489 st_upload_constants(st
, st
->fp
->Base
.Base
.Parameters
,
1490 MESA_SHADER_FRAGMENT
);
1493 assert(type
== GL_DEPTH
);
1494 rbRead
= st_renderbuffer(ctx
->ReadBuffer
->
1495 Attachment
[BUFFER_DEPTH
].Renderbuffer
);
1497 driver_fp
= get_drawpix_z_stencil_program(st
, GL_TRUE
, GL_FALSE
);
1498 driver_vp
= make_passthrough_vertex_shader(st
, GL_TRUE
);
1501 /* Choose the format for the temporary texture. */
1502 srcFormat
= rbRead
->texture
->format
;
1503 srcBind
= PIPE_BIND_SAMPLER_VIEW
|
1504 (type
== GL_COLOR
? PIPE_BIND_RENDER_TARGET
: PIPE_BIND_DEPTH_STENCIL
);
1506 if (!screen
->is_format_supported(screen
, srcFormat
, st
->internal_target
, 0,
1508 /* srcFormat is non-renderable. Find a compatible renderable format. */
1509 if (type
== GL_DEPTH
) {
1510 srcFormat
= st_choose_format(st
, GL_DEPTH_COMPONENT
, GL_NONE
,
1511 GL_NONE
, st
->internal_target
, 0,
1515 assert(type
== GL_COLOR
);
1517 if (util_format_is_float(srcFormat
)) {
1518 srcFormat
= st_choose_format(st
, GL_RGBA32F
, GL_NONE
,
1519 GL_NONE
, st
->internal_target
, 0,
1522 else if (util_format_is_pure_sint(srcFormat
)) {
1523 srcFormat
= st_choose_format(st
, GL_RGBA32I
, GL_NONE
,
1524 GL_NONE
, st
->internal_target
, 0,
1527 else if (util_format_is_pure_uint(srcFormat
)) {
1528 srcFormat
= st_choose_format(st
, GL_RGBA32UI
, GL_NONE
,
1529 GL_NONE
, st
->internal_target
, 0,
1532 else if (util_format_is_snorm(srcFormat
)) {
1533 srcFormat
= st_choose_format(st
, GL_RGBA16_SNORM
, GL_NONE
,
1534 GL_NONE
, st
->internal_target
, 0,
1538 srcFormat
= st_choose_format(st
, GL_RGBA
, GL_NONE
,
1539 GL_NONE
, st
->internal_target
, 0,
1544 if (srcFormat
== PIPE_FORMAT_NONE
) {
1545 assert(0 && "cannot choose a format for src of CopyPixels");
1550 /* Invert src region if needed */
1551 if (st_fb_orientation(ctx
->ReadBuffer
) == Y_0_TOP
) {
1552 srcy
= ctx
->ReadBuffer
->Height
- srcy
- height
;
1553 invertTex
= !invertTex
;
1556 /* Clip the read region against the src buffer bounds.
1557 * We'll still allocate a temporary buffer/texture for the original
1558 * src region size but we'll only read the region which is on-screen.
1559 * This may mean that we draw garbage pixels into the dest region, but
1566 if (!_mesa_clip_readpixels(ctx
, &readX
, &readY
, &readW
, &readH
, &pack
)) {
1567 /* The source region is completely out of bounds. Do nothing.
1568 * The GL spec says "Results of copies from outside the window,
1569 * or from regions of the window that are not exposed, are
1570 * hardware dependent and undefined."
1575 readW
= MAX2(0, readW
);
1576 readH
= MAX2(0, readH
);
1578 /* Allocate the temporary texture. */
1579 pt
= alloc_texture(st
, width
, height
, srcFormat
, srcBind
);
1583 sv
[0] = st_create_texture_sampler_view(st
->pipe
, pt
);
1585 pipe_resource_reference(&pt
, NULL
);
1589 /* Copy the src region to the temporary texture. */
1591 struct pipe_blit_info blit
;
1593 memset(&blit
, 0, sizeof(blit
));
1594 blit
.src
.resource
= rbRead
->texture
;
1595 blit
.src
.level
= rbRead
->surface
->u
.tex
.level
;
1596 blit
.src
.format
= rbRead
->texture
->format
;
1597 blit
.src
.box
.x
= readX
;
1598 blit
.src
.box
.y
= readY
;
1599 blit
.src
.box
.z
= rbRead
->surface
->u
.tex
.first_layer
;
1600 blit
.src
.box
.width
= readW
;
1601 blit
.src
.box
.height
= readH
;
1602 blit
.src
.box
.depth
= 1;
1603 blit
.dst
.resource
= pt
;
1605 blit
.dst
.format
= pt
->format
;
1606 blit
.dst
.box
.x
= pack
.SkipPixels
;
1607 blit
.dst
.box
.y
= pack
.SkipRows
;
1609 blit
.dst
.box
.width
= readW
;
1610 blit
.dst
.box
.height
= readH
;
1611 blit
.dst
.box
.depth
= 1;
1612 blit
.mask
= util_format_get_mask(pt
->format
) & ~PIPE_MASK_S
;
1613 blit
.filter
= PIPE_TEX_FILTER_NEAREST
;
1615 pipe
->blit(pipe
, &blit
);
1618 /* OK, the texture 'pt' contains the src image/pixels. Now draw a
1619 * textured quad with that texture.
1621 draw_textured_quad(ctx
, dstx
, dsty
, ctx
->Current
.RasterPos
[2],
1622 width
, height
, ctx
->Pixel
.ZoomX
, ctx
->Pixel
.ZoomY
,
1627 ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR0
],
1628 invertTex
, GL_FALSE
, GL_FALSE
);
1630 pipe_resource_reference(&pt
, NULL
);
1631 pipe_sampler_view_reference(&sv
[0], NULL
);
1636 void st_init_drawpixels_functions(struct dd_function_table
*functions
)
1638 functions
->DrawPixels
= st_DrawPixels
;
1639 functions
->CopyPixels
= st_CopyPixels
;
1644 st_destroy_drawpix(struct st_context
*st
)
1648 for (i
= 0; i
< ARRAY_SIZE(st
->drawpix
.zs_shaders
); i
++) {
1649 if (st
->drawpix
.zs_shaders
[i
])
1650 cso_delete_fragment_shader(st
->cso_context
,
1651 st
->drawpix
.zs_shaders
[i
]);
1654 if (st
->drawpix
.vert_shaders
[0])
1655 cso_delete_vertex_shader(st
->cso_context
, st
->drawpix
.vert_shaders
[0]);
1656 if (st
->drawpix
.vert_shaders
[1])
1657 cso_delete_vertex_shader(st
->cso_context
, st
->drawpix
.vert_shaders
[1]);