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_sampler_view.h"
64 #include "st_scissor.h"
65 #include "st_texture.h"
67 #include "pipe/p_context.h"
68 #include "pipe/p_defines.h"
69 #include "tgsi/tgsi_ureg.h"
70 #include "util/u_format.h"
71 #include "util/u_inlines.h"
72 #include "util/u_math.h"
73 #include "util/u_tile.h"
74 #include "cso_cache/cso_context.h"
78 * We have a simple glDrawPixels cache to try to optimize the case where the
79 * same image is drawn over and over again. It basically works as follows:
81 * 1. After we construct a texture map with the image and draw it, we do
82 * not discard the texture. We keep it around, plus we note the
83 * glDrawPixels width, height, format, etc. parameters and keep a copy
84 * of the image in a malloc'd buffer.
86 * 2. On the next glDrawPixels we check if the parameters match the previous
87 * call. If those match, we check if the image matches the previous image
88 * via a memcmp() call. If everything matches, we re-use the previous
89 * texture, thereby avoiding the cost creating a new texture and copying
92 * The effectiveness of this cache depends upon:
93 * 1. If the memcmp() finds a difference, it happens relatively quickly.
94 Hopefully, not just the last pixels differ!
95 * 2. If the memcmp() finds no difference, doing that check is faster than
96 * creating and loading a texture.
99 * 1. We don't support any pixel unpacking parameters.
100 * 2. We don't try to cache images in Pixel Buffer Objects.
101 * 3. Instead of saving the whole image, perhaps some sort of reliable
102 * checksum function could be used instead.
104 #define USE_DRAWPIXELS_CACHE 1
109 * Create fragment program that does a TEX() instruction to get a Z and/or
110 * stencil value value, then writes to FRAG_RESULT_DEPTH/FRAG_RESULT_STENCIL.
111 * Used for glDrawPixels(GL_DEPTH_COMPONENT / GL_STENCIL_INDEX).
112 * Pass fragment color through as-is.
114 * \return CSO of the fragment shader.
117 get_drawpix_z_stencil_program(struct st_context
*st
,
118 GLboolean write_depth
,
119 GLboolean write_stencil
)
121 struct ureg_program
*ureg
;
122 struct ureg_src depth_sampler
, stencil_sampler
;
123 struct ureg_src texcoord
, color
;
124 struct ureg_dst out_color
, out_depth
, out_stencil
;
125 const GLuint shaderIndex
= write_depth
* 2 + write_stencil
;
128 assert(shaderIndex
< ARRAY_SIZE(st
->drawpix
.zs_shaders
));
130 if (st
->drawpix
.zs_shaders
[shaderIndex
]) {
131 /* already have the proper shader */
132 return st
->drawpix
.zs_shaders
[shaderIndex
];
135 ureg
= ureg_create(PIPE_SHADER_FRAGMENT
);
139 ureg_property(ureg
, TGSI_PROPERTY_FS_COLOR0_WRITES_ALL_CBUFS
, TRUE
);
142 color
= ureg_DECL_fs_input(ureg
, TGSI_SEMANTIC_COLOR
, 0,
143 TGSI_INTERPOLATE_COLOR
);
144 out_color
= ureg_DECL_output(ureg
, TGSI_SEMANTIC_COLOR
, 0);
146 depth_sampler
= ureg_DECL_sampler(ureg
, 0);
147 ureg_DECL_sampler_view(ureg
, 0, TGSI_TEXTURE_2D
,
148 TGSI_RETURN_TYPE_FLOAT
,
149 TGSI_RETURN_TYPE_FLOAT
,
150 TGSI_RETURN_TYPE_FLOAT
,
151 TGSI_RETURN_TYPE_FLOAT
);
152 out_depth
= ureg_DECL_output(ureg
, TGSI_SEMANTIC_POSITION
, 0);
156 stencil_sampler
= ureg_DECL_sampler(ureg
, 1);
157 ureg_DECL_sampler_view(ureg
, 1, TGSI_TEXTURE_2D
,
158 TGSI_RETURN_TYPE_UINT
,
159 TGSI_RETURN_TYPE_UINT
,
160 TGSI_RETURN_TYPE_UINT
,
161 TGSI_RETURN_TYPE_UINT
);
162 out_stencil
= ureg_DECL_output(ureg
, TGSI_SEMANTIC_STENCIL
, 0);
165 texcoord
= ureg_DECL_fs_input(ureg
,
166 st
->needs_texcoord_semantic
?
167 TGSI_SEMANTIC_TEXCOORD
:
168 TGSI_SEMANTIC_GENERIC
,
169 0, TGSI_INTERPOLATE_LINEAR
);
172 ureg_TEX(ureg
, ureg_writemask(out_depth
, TGSI_WRITEMASK_Z
),
173 TGSI_TEXTURE_2D
, texcoord
, depth_sampler
);
174 ureg_MOV(ureg
, out_color
, color
);
178 ureg_TEX(ureg
, ureg_writemask(out_stencil
, TGSI_WRITEMASK_Y
),
179 TGSI_TEXTURE_2D
, texcoord
, stencil_sampler
);
182 cso
= ureg_create_shader_and_destroy(ureg
, st
->pipe
);
184 /* save the new shader */
185 st
->drawpix
.zs_shaders
[shaderIndex
] = cso
;
191 * Create a simple vertex shader that just passes through the
192 * vertex position and texcoord (and optionally, color).
195 make_passthrough_vertex_shader(struct st_context
*st
,
198 const unsigned texcoord_semantic
= st
->needs_texcoord_semantic
?
199 TGSI_SEMANTIC_TEXCOORD
: TGSI_SEMANTIC_GENERIC
;
201 if (!st
->drawpix
.vert_shaders
[passColor
]) {
202 struct ureg_program
*ureg
= ureg_create( PIPE_SHADER_VERTEX
);
207 /* MOV result.pos, vertex.pos; */
209 ureg_DECL_output( ureg
, TGSI_SEMANTIC_POSITION
, 0 ),
210 ureg_DECL_vs_input( ureg
, 0 ));
213 /* MOV result.color0, vertex.attr[1]; */
215 ureg_DECL_output( ureg
, TGSI_SEMANTIC_COLOR
, 0 ),
216 ureg_DECL_vs_input( ureg
, 1 ));
219 /* MOV result.texcoord0, vertex.attr[2]; */
221 ureg_DECL_output( ureg
, texcoord_semantic
, 0 ),
222 ureg_DECL_vs_input( ureg
, 2 ));
226 st
->drawpix
.vert_shaders
[passColor
] =
227 ureg_create_shader_and_destroy( ureg
, st
->pipe
);
230 return st
->drawpix
.vert_shaders
[passColor
];
235 * Return a texture internalFormat for drawing/copying an image
236 * of the given format and type.
239 internal_format(struct gl_context
*ctx
, GLenum format
, GLenum type
)
242 case GL_DEPTH_COMPONENT
:
244 case GL_UNSIGNED_SHORT
:
245 return GL_DEPTH_COMPONENT16
;
247 case GL_UNSIGNED_INT
:
248 return GL_DEPTH_COMPONENT32
;
251 if (ctx
->Extensions
.ARB_depth_buffer_float
)
252 return GL_DEPTH_COMPONENT32F
;
254 return GL_DEPTH_COMPONENT
;
257 return GL_DEPTH_COMPONENT
;
260 case GL_DEPTH_STENCIL
:
262 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV
:
263 return GL_DEPTH32F_STENCIL8
;
265 case GL_UNSIGNED_INT_24_8
:
267 return GL_DEPTH24_STENCIL8
;
270 case GL_STENCIL_INDEX
:
271 return GL_STENCIL_INDEX
;
274 if (_mesa_is_enum_format_integer(format
)) {
278 case GL_UNSIGNED_BYTE
:
282 case GL_UNSIGNED_SHORT
:
286 case GL_UNSIGNED_INT
:
289 assert(0 && "Unexpected type in internal_format()");
290 return GL_RGBA_INTEGER
;
295 case GL_UNSIGNED_BYTE
:
296 case GL_UNSIGNED_INT_8_8_8_8
:
297 case GL_UNSIGNED_INT_8_8_8_8_REV
:
301 case GL_UNSIGNED_BYTE_3_3_2
:
302 case GL_UNSIGNED_BYTE_2_3_3_REV
:
305 case GL_UNSIGNED_SHORT_4_4_4_4
:
306 case GL_UNSIGNED_SHORT_4_4_4_4_REV
:
309 case GL_UNSIGNED_SHORT_5_6_5
:
310 case GL_UNSIGNED_SHORT_5_6_5_REV
:
313 case GL_UNSIGNED_SHORT_5_5_5_1
:
314 case GL_UNSIGNED_SHORT_1_5_5_5_REV
:
317 case GL_UNSIGNED_INT_10_10_10_2
:
318 case GL_UNSIGNED_INT_2_10_10_10_REV
:
321 case GL_UNSIGNED_SHORT
:
322 case GL_UNSIGNED_INT
:
327 ctx
->Extensions
.EXT_texture_snorm
? GL_RGBA8_SNORM
: GL_RGBA8
;
332 ctx
->Extensions
.EXT_texture_snorm
? GL_RGBA16_SNORM
: GL_RGBA16
;
334 case GL_HALF_FLOAT_ARB
:
336 ctx
->Extensions
.ARB_texture_float
? GL_RGBA16F
:
337 ctx
->Extensions
.EXT_texture_snorm
? GL_RGBA16_SNORM
: GL_RGBA16
;
342 ctx
->Extensions
.ARB_texture_float
? GL_RGBA32F
:
343 ctx
->Extensions
.EXT_texture_snorm
? GL_RGBA16_SNORM
: GL_RGBA16
;
345 case GL_UNSIGNED_INT_5_9_9_9_REV
:
346 assert(ctx
->Extensions
.EXT_texture_shared_exponent
);
349 case GL_UNSIGNED_INT_10F_11F_11F_REV
:
350 assert(ctx
->Extensions
.EXT_packed_float
);
351 return GL_R11F_G11F_B10F
;
359 * Create a temporary texture to hold an image of the given size.
360 * If width, height are not POT and the driver only handles POT textures,
361 * allocate the next larger size of texture that is POT.
363 static struct pipe_resource
*
364 alloc_texture(struct st_context
*st
, GLsizei width
, GLsizei height
,
365 enum pipe_format texFormat
, unsigned bind
)
367 struct pipe_resource
*pt
;
369 pt
= st_texture_create(st
, st
->internal_target
, texFormat
, 0,
370 width
, height
, 1, 1, 0, bind
);
377 * Make texture containing an image for glDrawPixels image.
378 * If 'pixels' is NULL, leave the texture image data undefined.
380 static struct pipe_resource
*
381 make_texture(struct st_context
*st
,
382 GLsizei width
, GLsizei height
, GLenum format
, GLenum type
,
383 const struct gl_pixelstore_attrib
*unpack
,
386 struct gl_context
*ctx
= st
->ctx
;
387 struct pipe_context
*pipe
= st
->pipe
;
389 struct pipe_resource
*pt
= NULL
;
390 enum pipe_format pipeFormat
;
391 GLenum baseInternalFormat
;
393 #if USE_DRAWPIXELS_CACHE
394 const GLint bpp
= _mesa_bytes_per_pixel(format
, type
);
396 /* Check if the glDrawPixels() parameters and state matches the cache */
397 if (width
== st
->drawpix_cache
.width
&&
398 height
== st
->drawpix_cache
.height
&&
399 format
== st
->drawpix_cache
.format
&&
400 type
== st
->drawpix_cache
.type
&&
401 pixels
== st
->drawpix_cache
.user_pointer
&&
402 !_mesa_is_bufferobj(unpack
->BufferObj
) &&
403 (unpack
->RowLength
== 0 || unpack
->RowLength
== width
) &&
404 unpack
->SkipPixels
== 0 &&
405 unpack
->SkipRows
== 0 &&
406 unpack
->SwapBytes
== GL_FALSE
&&
407 st
->drawpix_cache
.image
) {
408 assert(st
->drawpix_cache
.texture
);
410 /* check if the pixel data is the same */
411 if (memcmp(pixels
, st
->drawpix_cache
.image
, width
* height
* bpp
) == 0) {
412 /* OK, re-use the cached texture */
413 pipe_resource_reference(&pt
, st
->drawpix_cache
.texture
);
414 /* refcount of returned texture should be at least two here. One
415 * reference for the cache to hold on to, one for the caller (which
416 * it will release), and possibly more held by the driver.
418 assert(pt
->reference
.count
>= 2);
423 /* discard the cached image and texture (if there is one) */
424 st
->drawpix_cache
.width
= 0;
425 st
->drawpix_cache
.height
= 0;
426 st
->drawpix_cache
.user_pointer
= NULL
;
427 if (st
->drawpix_cache
.image
) {
428 free(st
->drawpix_cache
.image
);
429 st
->drawpix_cache
.image
= NULL
;
431 pipe_resource_reference(&st
->drawpix_cache
.texture
, NULL
);
434 /* Choose a pixel format for the temp texture which will hold the
437 pipeFormat
= st_choose_matching_format(st
, PIPE_BIND_SAMPLER_VIEW
,
438 format
, type
, unpack
->SwapBytes
);
440 if (pipeFormat
== PIPE_FORMAT_NONE
) {
441 /* Use the generic approach. */
442 GLenum intFormat
= internal_format(ctx
, format
, type
);
444 pipeFormat
= st_choose_format(st
, intFormat
, format
, type
,
445 st
->internal_target
, 0,
446 PIPE_BIND_SAMPLER_VIEW
, FALSE
);
447 assert(pipeFormat
!= PIPE_FORMAT_NONE
);
450 mformat
= st_pipe_format_to_mesa_format(pipeFormat
);
451 baseInternalFormat
= _mesa_get_format_base_format(mformat
);
453 pixels
= _mesa_map_pbo_source(ctx
, unpack
, pixels
);
457 /* alloc temporary texture */
458 pt
= alloc_texture(st
, width
, height
, pipeFormat
, PIPE_BIND_SAMPLER_VIEW
);
460 _mesa_unmap_pbo_source(ctx
, unpack
);
465 struct pipe_transfer
*transfer
;
468 const GLbitfield imageTransferStateSave
= ctx
->_ImageTransferState
;
470 /* we'll do pixel transfer in a fragment shader */
471 ctx
->_ImageTransferState
= 0x0;
473 /* map texture transfer */
474 dest
= pipe_transfer_map(pipe
, pt
, 0, 0,
475 PIPE_TRANSFER_WRITE
, 0, 0,
476 width
, height
, &transfer
);
479 /* Put image into texture transfer.
480 * Note that the image is actually going to be upside down in
481 * the texture. We deal with that with texcoords.
483 if ((format
== GL_RGBA
|| format
== GL_BGRA
)
484 && type
== GL_UNSIGNED_BYTE
) {
485 /* Use a memcpy-based texstore to avoid software pixel swizzling.
486 * We'll do the necessary swizzling with the pipe_sampler_view to
487 * give much better performance.
488 * XXX in the future, expand this to accomodate more format and
491 _mesa_memcpy_texture(ctx
, 2,
492 mformat
, /* mesa_format */
493 transfer
->stride
, /* dstRowStride, bytes */
494 &dest
, /* destSlices */
495 width
, height
, 1, /* size */
496 format
, type
, /* src format/type */
497 pixels
, /* data source */
502 success
= _mesa_texstore(ctx
, 2, /* dims */
503 baseInternalFormat
, /* baseInternalFormat */
504 mformat
, /* mesa_format */
505 transfer
->stride
, /* dstRowStride, bytes */
506 &dest
, /* destSlices */
507 width
, height
, 1, /* size */
508 format
, type
, /* src format/type */
509 pixels
, /* data source */
514 pipe_transfer_unmap(pipe
, transfer
);
519 ctx
->_ImageTransferState
= imageTransferStateSave
;
522 _mesa_unmap_pbo_source(ctx
, unpack
);
524 #if USE_DRAWPIXELS_CACHE
525 /* Save the glDrawPixels parameter and image in the cache */
526 if ((unpack
->RowLength
== 0 || unpack
->RowLength
== width
) &&
527 unpack
->SkipPixels
== 0 &&
528 unpack
->SkipRows
== 0) {
529 st
->drawpix_cache
.width
= width
;
530 st
->drawpix_cache
.height
= height
;
531 st
->drawpix_cache
.format
= format
;
532 st
->drawpix_cache
.type
= type
;
533 st
->drawpix_cache
.user_pointer
= pixels
;
534 assert(!st
->drawpix_cache
.image
);
535 st
->drawpix_cache
.image
= malloc(width
* height
* bpp
);
536 if (st
->drawpix_cache
.image
) {
537 memcpy(st
->drawpix_cache
.image
, pixels
, width
* height
* bpp
);
538 pipe_resource_reference(&st
->drawpix_cache
.texture
, pt
);
541 /* out of memory, free/disable cached texture */
542 st
->drawpix_cache
.width
= 0;
543 st
->drawpix_cache
.height
= 0;
544 pipe_resource_reference(&st
->drawpix_cache
.texture
, NULL
);
554 draw_textured_quad(struct gl_context
*ctx
, GLint x
, GLint y
, GLfloat z
,
555 GLsizei width
, GLsizei height
,
556 GLfloat zoomX
, GLfloat zoomY
,
557 struct pipe_sampler_view
**sv
,
558 int num_sampler_view
,
561 struct st_fp_variant
*fpv
,
562 const GLfloat
*color
,
564 GLboolean write_depth
, GLboolean write_stencil
)
566 struct st_context
*st
= st_context(ctx
);
567 struct pipe_context
*pipe
= st
->pipe
;
568 struct cso_context
*cso
= st
->cso_context
;
569 const unsigned fb_width
= _mesa_geometric_width(ctx
->DrawBuffer
);
570 const unsigned fb_height
= _mesa_geometric_height(ctx
->DrawBuffer
);
571 GLfloat x0
, y0
, x1
, y1
;
573 boolean normalized
= sv
[0]->texture
->target
== PIPE_TEXTURE_2D
;
574 unsigned cso_state_mask
;
576 assert(sv
[0]->texture
->target
== st
->internal_target
);
579 /* XXX if DrawPixels image is larger than max texture size, break
582 maxSize
= 1 << (pipe
->screen
->get_param(pipe
->screen
,
583 PIPE_CAP_MAX_TEXTURE_2D_LEVELS
) - 1);
584 assert(width
<= maxSize
);
585 assert(height
<= maxSize
);
587 cso_state_mask
= (CSO_BIT_RASTERIZER
|
589 CSO_BIT_FRAGMENT_SAMPLERS
|
590 CSO_BIT_FRAGMENT_SAMPLER_VIEWS
|
591 CSO_BIT_STREAM_OUTPUTS
|
592 CSO_BIT_VERTEX_ELEMENTS
|
593 CSO_BIT_AUX_VERTEX_BUFFER_SLOT
|
594 CSO_BITS_ALL_SHADERS
);
596 cso_state_mask
|= (CSO_BIT_DEPTH_STENCIL_ALPHA
|
599 cso_save_state(cso
, cso_state_mask
);
601 /* rasterizer state: just scissor */
603 struct pipe_rasterizer_state rasterizer
;
604 memset(&rasterizer
, 0, sizeof(rasterizer
));
605 rasterizer
.clamp_fragment_color
= !st
->clamp_frag_color_in_shader
&&
606 ctx
->Color
._ClampFragmentColor
;
607 rasterizer
.half_pixel_center
= 1;
608 rasterizer
.bottom_edge_rule
= 1;
609 rasterizer
.depth_clip
= !ctx
->Transform
.DepthClamp
;
610 rasterizer
.scissor
= ctx
->Scissor
.EnableFlags
;
611 cso_set_rasterizer(cso
, &rasterizer
);
615 /* Stencil writing bypasses the normal fragment pipeline to
616 * disable color writing and set stencil test to always pass.
618 struct pipe_depth_stencil_alpha_state dsa
;
619 struct pipe_blend_state blend
;
622 memset(&dsa
, 0, sizeof(dsa
));
623 dsa
.stencil
[0].enabled
= 1;
624 dsa
.stencil
[0].func
= PIPE_FUNC_ALWAYS
;
625 dsa
.stencil
[0].writemask
= ctx
->Stencil
.WriteMask
[0] & 0xff;
626 dsa
.stencil
[0].zpass_op
= PIPE_STENCIL_OP_REPLACE
;
628 /* writing depth+stencil: depth test always passes */
629 dsa
.depth
.enabled
= 1;
630 dsa
.depth
.writemask
= ctx
->Depth
.Mask
;
631 dsa
.depth
.func
= PIPE_FUNC_ALWAYS
;
633 cso_set_depth_stencil_alpha(cso
, &dsa
);
635 /* blend (colormask) */
636 memset(&blend
, 0, sizeof(blend
));
637 cso_set_blend(cso
, &blend
);
640 /* fragment shader state: TEX lookup program */
641 cso_set_fragment_shader_handle(cso
, driver_fp
);
643 /* vertex shader state: position + texcoord pass-through */
644 cso_set_vertex_shader_handle(cso
, driver_vp
);
646 /* disable other shaders */
647 cso_set_tessctrl_shader_handle(cso
, NULL
);
648 cso_set_tesseval_shader_handle(cso
, NULL
);
649 cso_set_geometry_shader_handle(cso
, NULL
);
651 /* user samplers, plus the drawpix samplers */
653 struct pipe_sampler_state sampler
;
655 memset(&sampler
, 0, sizeof(sampler
));
656 sampler
.wrap_s
= PIPE_TEX_WRAP_CLAMP
;
657 sampler
.wrap_t
= PIPE_TEX_WRAP_CLAMP
;
658 sampler
.wrap_r
= PIPE_TEX_WRAP_CLAMP
;
659 sampler
.min_img_filter
= PIPE_TEX_FILTER_NEAREST
;
660 sampler
.min_mip_filter
= PIPE_TEX_MIPFILTER_NONE
;
661 sampler
.mag_img_filter
= PIPE_TEX_FILTER_NEAREST
;
662 sampler
.normalized_coords
= normalized
;
665 /* drawing a color image */
666 const struct pipe_sampler_state
*samplers
[PIPE_MAX_SAMPLERS
];
667 uint num
= MAX3(fpv
->drawpix_sampler
+ 1,
668 fpv
->pixelmap_sampler
+ 1,
669 st
->state
.num_samplers
[PIPE_SHADER_FRAGMENT
]);
672 for (i
= 0; i
< st
->state
.num_samplers
[PIPE_SHADER_FRAGMENT
]; i
++)
673 samplers
[i
] = &st
->state
.samplers
[PIPE_SHADER_FRAGMENT
][i
];
675 samplers
[fpv
->drawpix_sampler
] = &sampler
;
677 samplers
[fpv
->pixelmap_sampler
] = &sampler
;
679 cso_set_samplers(cso
, PIPE_SHADER_FRAGMENT
, num
, samplers
);
681 /* drawing a depth/stencil image */
682 const struct pipe_sampler_state
*samplers
[2] = {&sampler
, &sampler
};
684 cso_set_samplers(cso
, PIPE_SHADER_FRAGMENT
, num_sampler_view
, samplers
);
688 /* user textures, plus the drawpix textures */
690 /* drawing a color image */
691 struct pipe_sampler_view
*sampler_views
[PIPE_MAX_SAMPLERS
];
692 uint num
= MAX3(fpv
->drawpix_sampler
+ 1,
693 fpv
->pixelmap_sampler
+ 1,
694 st
->state
.num_sampler_views
[PIPE_SHADER_FRAGMENT
]);
696 memcpy(sampler_views
, st
->state
.sampler_views
[PIPE_SHADER_FRAGMENT
],
697 sizeof(sampler_views
));
699 sampler_views
[fpv
->drawpix_sampler
] = sv
[0];
701 sampler_views
[fpv
->pixelmap_sampler
] = sv
[1];
702 cso_set_sampler_views(cso
, PIPE_SHADER_FRAGMENT
, num
, sampler_views
);
704 /* drawing a depth/stencil image */
705 cso_set_sampler_views(cso
, PIPE_SHADER_FRAGMENT
, num_sampler_view
, sv
);
708 /* viewport state: viewport matching window dims */
709 cso_set_viewport_dims(cso
, fb_width
, fb_height
, TRUE
);
711 cso_set_vertex_elements(cso
, 3, st
->util_velems
);
712 cso_set_stream_outputs(cso
, 0, NULL
, NULL
);
714 /* Compute Gallium window coords (y=0=top) with pixel zoom.
715 * Recall that these coords are transformed by the current
716 * vertex shader and viewport transformation.
718 if (st_fb_orientation(ctx
->DrawBuffer
) == Y_0_BOTTOM
) {
719 y
= fb_height
- (int) (y
+ height
* ctx
->Pixel
.ZoomY
);
720 invertTex
= !invertTex
;
724 x1
= x
+ width
* ctx
->Pixel
.ZoomX
;
726 y1
= y
+ height
* ctx
->Pixel
.ZoomY
;
728 /* convert Z from [0,1] to [-1,-1] to match viewport Z scale/bias */
732 const float clip_x0
= x0
/ (float) fb_width
* 2.0f
- 1.0f
;
733 const float clip_y0
= y0
/ (float) fb_height
* 2.0f
- 1.0f
;
734 const float clip_x1
= x1
/ (float) fb_width
* 2.0f
- 1.0f
;
735 const float clip_y1
= y1
/ (float) fb_height
* 2.0f
- 1.0f
;
736 const float maxXcoord
= normalized
?
737 ((float) width
/ sv
[0]->texture
->width0
) : (float) width
;
738 const float maxYcoord
= normalized
739 ? ((float) height
/ sv
[0]->texture
->height0
) : (float) height
;
740 const float sLeft
= 0.0f
, sRight
= maxXcoord
;
741 const float tTop
= invertTex
? maxYcoord
: 0.0f
;
742 const float tBot
= invertTex
? 0.0f
: maxYcoord
;
744 if (!st_draw_quad(st
, clip_x0
, clip_y0
, clip_x1
, clip_y1
, z
,
745 sLeft
, tBot
, sRight
, tTop
, color
, 0)) {
746 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glDrawPixels");
751 cso_restore_state(cso
);
756 * Software fallback to do glDrawPixels(GL_STENCIL_INDEX) when we
757 * can't use a fragment shader to write stencil values.
760 draw_stencil_pixels(struct gl_context
*ctx
, GLint x
, GLint y
,
761 GLsizei width
, GLsizei height
, GLenum format
, GLenum type
,
762 const struct gl_pixelstore_attrib
*unpack
,
765 struct st_context
*st
= st_context(ctx
);
766 struct pipe_context
*pipe
= st
->pipe
;
767 struct st_renderbuffer
*strb
;
768 enum pipe_transfer_usage usage
;
769 struct pipe_transfer
*pt
;
770 const GLboolean zoom
= ctx
->Pixel
.ZoomX
!= 1.0 || ctx
->Pixel
.ZoomY
!= 1.0;
772 struct gl_pixelstore_attrib clippedUnpack
= *unpack
;
777 if (!_mesa_clip_drawpixels(ctx
, &x
, &y
, &width
, &height
,
779 /* totally clipped */
784 strb
= st_renderbuffer(ctx
->DrawBuffer
->
785 Attachment
[BUFFER_STENCIL
].Renderbuffer
);
787 if (st_fb_orientation(ctx
->DrawBuffer
) == Y_0_TOP
) {
788 y
= ctx
->DrawBuffer
->Height
- y
- height
;
791 if (format
== GL_STENCIL_INDEX
&&
792 _mesa_is_format_packed_depth_stencil(strb
->Base
.Format
)) {
793 /* writing stencil to a combined depth+stencil buffer */
794 usage
= PIPE_TRANSFER_READ_WRITE
;
797 usage
= PIPE_TRANSFER_WRITE
;
800 stmap
= pipe_transfer_map(pipe
, strb
->texture
,
801 strb
->surface
->u
.tex
.level
,
802 strb
->surface
->u
.tex
.first_layer
,
806 pixels
= _mesa_map_pbo_source(ctx
, &clippedUnpack
, pixels
);
809 sValues
= malloc(width
* sizeof(GLubyte
));
810 zValues
= malloc(width
* sizeof(GLuint
));
812 if (sValues
&& zValues
) {
814 for (row
= 0; row
< height
; row
++) {
815 GLfloat
*zValuesFloat
= (GLfloat
*)zValues
;
816 GLenum destType
= GL_UNSIGNED_BYTE
;
817 const void *source
= _mesa_image_address2d(&clippedUnpack
, pixels
,
821 _mesa_unpack_stencil_span(ctx
, width
, destType
, sValues
,
822 type
, source
, &clippedUnpack
,
823 ctx
->_ImageTransferState
);
825 if (format
== GL_DEPTH_STENCIL
) {
827 pt
->resource
->format
== PIPE_FORMAT_Z32_FLOAT_S8X24_UINT
?
828 GL_FLOAT
: GL_UNSIGNED_INT
;
830 _mesa_unpack_depth_span(ctx
, width
, ztype
, zValues
,
831 (1 << 24) - 1, type
, source
,
836 _mesa_problem(ctx
, "Gallium glDrawPixels(GL_STENCIL) with "
837 "zoom not complete");
843 if (st_fb_orientation(ctx
->DrawBuffer
) == Y_0_TOP
) {
844 spanY
= height
- row
- 1;
850 /* now pack the stencil (and Z) values in the dest format */
851 switch (pt
->resource
->format
) {
852 case PIPE_FORMAT_S8_UINT
:
854 ubyte
*dest
= stmap
+ spanY
* pt
->stride
;
855 assert(usage
== PIPE_TRANSFER_WRITE
);
856 memcpy(dest
, sValues
, width
);
859 case PIPE_FORMAT_Z24_UNORM_S8_UINT
:
860 if (format
== GL_DEPTH_STENCIL
) {
861 uint
*dest
= (uint
*) (stmap
+ spanY
* pt
->stride
);
863 assert(usage
== PIPE_TRANSFER_WRITE
);
864 for (k
= 0; k
< width
; k
++) {
865 dest
[k
] = zValues
[k
] | (sValues
[k
] << 24);
869 uint
*dest
= (uint
*) (stmap
+ spanY
* pt
->stride
);
871 assert(usage
== PIPE_TRANSFER_READ_WRITE
);
872 for (k
= 0; k
< width
; k
++) {
873 dest
[k
] = (dest
[k
] & 0xffffff) | (sValues
[k
] << 24);
877 case PIPE_FORMAT_S8_UINT_Z24_UNORM
:
878 if (format
== GL_DEPTH_STENCIL
) {
879 uint
*dest
= (uint
*) (stmap
+ spanY
* pt
->stride
);
881 assert(usage
== PIPE_TRANSFER_WRITE
);
882 for (k
= 0; k
< width
; k
++) {
883 dest
[k
] = (zValues
[k
] << 8) | (sValues
[k
] & 0xff);
887 uint
*dest
= (uint
*) (stmap
+ spanY
* pt
->stride
);
889 assert(usage
== PIPE_TRANSFER_READ_WRITE
);
890 for (k
= 0; k
< width
; k
++) {
891 dest
[k
] = (dest
[k
] & 0xffffff00) | (sValues
[k
] & 0xff);
895 case PIPE_FORMAT_Z32_FLOAT_S8X24_UINT
:
896 if (format
== GL_DEPTH_STENCIL
) {
897 uint
*dest
= (uint
*) (stmap
+ spanY
* pt
->stride
);
898 GLfloat
*destf
= (GLfloat
*)dest
;
900 assert(usage
== PIPE_TRANSFER_WRITE
);
901 for (k
= 0; k
< width
; k
++) {
902 destf
[k
*2] = zValuesFloat
[k
];
903 dest
[k
*2+1] = sValues
[k
] & 0xff;
907 uint
*dest
= (uint
*) (stmap
+ spanY
* pt
->stride
);
909 assert(usage
== PIPE_TRANSFER_READ_WRITE
);
910 for (k
= 0; k
< width
; k
++) {
911 dest
[k
*2+1] = sValues
[k
] & 0xff;
922 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glDrawPixels()");
928 _mesa_unmap_pbo_source(ctx
, &clippedUnpack
);
930 /* unmap the stencil buffer */
931 pipe_transfer_unmap(pipe
, pt
);
936 * Get fragment program variant for a glDrawPixels or glCopyPixels
937 * command for RGBA data.
939 static struct st_fp_variant
*
940 get_color_fp_variant(struct st_context
*st
)
942 struct gl_context
*ctx
= st
->ctx
;
943 struct st_fp_variant_key key
;
944 struct st_fp_variant
*fpv
;
946 memset(&key
, 0, sizeof(key
));
948 key
.st
= st
->has_shareable_shaders
? NULL
: st
;
950 key
.scaleAndBias
= (ctx
->Pixel
.RedBias
!= 0.0 ||
951 ctx
->Pixel
.RedScale
!= 1.0 ||
952 ctx
->Pixel
.GreenBias
!= 0.0 ||
953 ctx
->Pixel
.GreenScale
!= 1.0 ||
954 ctx
->Pixel
.BlueBias
!= 0.0 ||
955 ctx
->Pixel
.BlueScale
!= 1.0 ||
956 ctx
->Pixel
.AlphaBias
!= 0.0 ||
957 ctx
->Pixel
.AlphaScale
!= 1.0);
958 key
.pixelMaps
= ctx
->Pixel
.MapColorFlag
;
959 key
.clamp_color
= st
->clamp_frag_color_in_shader
&&
960 ctx
->Color
._ClampFragmentColor
;
962 fpv
= st_get_fp_variant(st
, st
->fp
, &key
);
969 * Clamp glDrawPixels width and height to the maximum texture size.
972 clamp_size(struct pipe_context
*pipe
, GLsizei
*width
, GLsizei
*height
,
973 struct gl_pixelstore_attrib
*unpack
)
976 1 << (pipe
->screen
->get_param(pipe
->screen
,
977 PIPE_CAP_MAX_TEXTURE_2D_LEVELS
) - 1);
979 if (*width
> maxSize
) {
980 if (unpack
->RowLength
== 0)
981 unpack
->RowLength
= *width
;
984 if (*height
> maxSize
) {
991 * Search the array of 4 swizzle components for the named component and return
995 search_swizzle(const unsigned char swizzle
[4], unsigned component
)
998 for (i
= 0; i
< 4; i
++) {
999 if (swizzle
[i
] == component
)
1002 assert(!"search_swizzle() failed");
1008 * Set the sampler view's swizzle terms. This is used to handle RGBA
1009 * swizzling when the incoming image format isn't an exact match for
1010 * the actual texture format. For example, if we have glDrawPixels(
1011 * GL_RGBA, GL_UNSIGNED_BYTE) and we chose the texture format
1012 * PIPE_FORMAT_B8G8R8A8 then we can do use the sampler view swizzle to
1013 * avoid swizzling all the pixels in software in the texstore code.
1016 setup_sampler_swizzle(struct pipe_sampler_view
*sv
, GLenum format
, GLenum type
)
1018 if ((format
== GL_RGBA
|| format
== GL_BGRA
) && type
== GL_UNSIGNED_BYTE
) {
1019 const struct util_format_description
*desc
=
1020 util_format_description(sv
->texture
->format
);
1021 unsigned c0
, c1
, c2
, c3
;
1023 /* Every gallium driver supports at least one 32-bit packed RGBA format.
1024 * We must have chosen one for (GL_RGBA, GL_UNSIGNED_BYTE).
1026 assert(desc
->block
.bits
== 32);
1028 /* invert the format's swizzle to setup the sampler's swizzle */
1029 if (format
== GL_RGBA
) {
1030 c0
= PIPE_SWIZZLE_X
;
1031 c1
= PIPE_SWIZZLE_Y
;
1032 c2
= PIPE_SWIZZLE_Z
;
1033 c3
= PIPE_SWIZZLE_W
;
1036 assert(format
== GL_BGRA
);
1037 c0
= PIPE_SWIZZLE_Z
;
1038 c1
= PIPE_SWIZZLE_Y
;
1039 c2
= PIPE_SWIZZLE_X
;
1040 c3
= PIPE_SWIZZLE_W
;
1042 sv
->swizzle_r
= search_swizzle(desc
->swizzle
, c0
);
1043 sv
->swizzle_g
= search_swizzle(desc
->swizzle
, c1
);
1044 sv
->swizzle_b
= search_swizzle(desc
->swizzle
, c2
);
1045 sv
->swizzle_a
= search_swizzle(desc
->swizzle
, c3
);
1048 /* use the default sampler swizzle */
1054 * Called via ctx->Driver.DrawPixels()
1057 st_DrawPixels(struct gl_context
*ctx
, GLint x
, GLint y
,
1058 GLsizei width
, GLsizei height
,
1059 GLenum format
, GLenum type
,
1060 const struct gl_pixelstore_attrib
*unpack
, const void *pixels
)
1062 void *driver_vp
, *driver_fp
;
1063 struct st_context
*st
= st_context(ctx
);
1064 struct pipe_context
*pipe
= st
->pipe
;
1065 GLboolean write_stencil
= GL_FALSE
, write_depth
= GL_FALSE
;
1066 struct pipe_sampler_view
*sv
[2] = { NULL
};
1067 int num_sampler_view
= 1;
1068 struct gl_pixelstore_attrib clippedUnpack
;
1069 struct st_fp_variant
*fpv
= NULL
;
1070 struct pipe_resource
*pt
;
1072 /* Mesa state should be up to date by now */
1073 assert(ctx
->NewState
== 0x0);
1075 st_flush_bitmap_cache(st
);
1076 st_invalidate_readpix_cache(st
);
1078 st_validate_state(st
, ST_PIPELINE_RENDER
);
1080 /* Limit the size of the glDrawPixels to the max texture size.
1081 * Strictly speaking, that's not correct but since we don't handle
1082 * larger images yet, this is better than crashing.
1084 clippedUnpack
= *unpack
;
1085 unpack
= &clippedUnpack
;
1086 clamp_size(st
->pipe
, &width
, &height
, &clippedUnpack
);
1088 if (format
== GL_DEPTH_STENCIL
)
1089 write_stencil
= write_depth
= GL_TRUE
;
1090 else if (format
== GL_STENCIL_INDEX
)
1091 write_stencil
= GL_TRUE
;
1092 else if (format
== GL_DEPTH_COMPONENT
)
1093 write_depth
= GL_TRUE
;
1095 if (write_stencil
&&
1096 !pipe
->screen
->get_param(pipe
->screen
, PIPE_CAP_SHADER_STENCIL_EXPORT
)) {
1097 /* software fallback */
1098 draw_stencil_pixels(ctx
, x
, y
, width
, height
, format
, type
,
1104 * Get vertex/fragment shaders
1106 if (write_depth
|| write_stencil
) {
1107 driver_fp
= get_drawpix_z_stencil_program(st
, write_depth
,
1109 driver_vp
= make_passthrough_vertex_shader(st
, GL_TRUE
);
1112 fpv
= get_color_fp_variant(st
);
1114 driver_fp
= fpv
->driver_shader
;
1115 driver_vp
= make_passthrough_vertex_shader(st
, GL_FALSE
);
1117 if (ctx
->Pixel
.MapColorFlag
) {
1118 pipe_sampler_view_reference(&sv
[1],
1119 st
->pixel_xfer
.pixelmap_sampler_view
);
1123 /* compiling a new fragment shader variant added new state constants
1124 * into the constant buffer, we need to update them
1126 st_upload_constants(st
, st
->fp
->Base
.Parameters
, 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
.Parameters
, MESA_SHADER_FRAGMENT
);
1492 assert(type
== GL_DEPTH
);
1493 rbRead
= st_renderbuffer(ctx
->ReadBuffer
->
1494 Attachment
[BUFFER_DEPTH
].Renderbuffer
);
1496 driver_fp
= get_drawpix_z_stencil_program(st
, GL_TRUE
, GL_FALSE
);
1497 driver_vp
= make_passthrough_vertex_shader(st
, GL_TRUE
);
1500 /* Choose the format for the temporary texture. */
1501 srcFormat
= rbRead
->texture
->format
;
1502 srcBind
= PIPE_BIND_SAMPLER_VIEW
|
1503 (type
== GL_COLOR
? PIPE_BIND_RENDER_TARGET
: PIPE_BIND_DEPTH_STENCIL
);
1505 if (!screen
->is_format_supported(screen
, srcFormat
, st
->internal_target
, 0,
1507 /* srcFormat is non-renderable. Find a compatible renderable format. */
1508 if (type
== GL_DEPTH
) {
1509 srcFormat
= st_choose_format(st
, GL_DEPTH_COMPONENT
, GL_NONE
,
1510 GL_NONE
, st
->internal_target
, 0,
1514 assert(type
== GL_COLOR
);
1516 if (util_format_is_float(srcFormat
)) {
1517 srcFormat
= st_choose_format(st
, GL_RGBA32F
, GL_NONE
,
1518 GL_NONE
, st
->internal_target
, 0,
1521 else if (util_format_is_pure_sint(srcFormat
)) {
1522 srcFormat
= st_choose_format(st
, GL_RGBA32I
, GL_NONE
,
1523 GL_NONE
, st
->internal_target
, 0,
1526 else if (util_format_is_pure_uint(srcFormat
)) {
1527 srcFormat
= st_choose_format(st
, GL_RGBA32UI
, GL_NONE
,
1528 GL_NONE
, st
->internal_target
, 0,
1531 else if (util_format_is_snorm(srcFormat
)) {
1532 srcFormat
= st_choose_format(st
, GL_RGBA16_SNORM
, GL_NONE
,
1533 GL_NONE
, st
->internal_target
, 0,
1537 srcFormat
= st_choose_format(st
, GL_RGBA
, GL_NONE
,
1538 GL_NONE
, st
->internal_target
, 0,
1543 if (srcFormat
== PIPE_FORMAT_NONE
) {
1544 assert(0 && "cannot choose a format for src of CopyPixels");
1549 /* Invert src region if needed */
1550 if (st_fb_orientation(ctx
->ReadBuffer
) == Y_0_TOP
) {
1551 srcy
= ctx
->ReadBuffer
->Height
- srcy
- height
;
1552 invertTex
= !invertTex
;
1555 /* Clip the read region against the src buffer bounds.
1556 * We'll still allocate a temporary buffer/texture for the original
1557 * src region size but we'll only read the region which is on-screen.
1558 * This may mean that we draw garbage pixels into the dest region, but
1565 if (!_mesa_clip_readpixels(ctx
, &readX
, &readY
, &readW
, &readH
, &pack
)) {
1566 /* The source region is completely out of bounds. Do nothing.
1567 * The GL spec says "Results of copies from outside the window,
1568 * or from regions of the window that are not exposed, are
1569 * hardware dependent and undefined."
1574 readW
= MAX2(0, readW
);
1575 readH
= MAX2(0, readH
);
1577 /* Allocate the temporary texture. */
1578 pt
= alloc_texture(st
, width
, height
, srcFormat
, srcBind
);
1582 sv
[0] = st_create_texture_sampler_view(st
->pipe
, pt
);
1584 pipe_resource_reference(&pt
, NULL
);
1588 /* Copy the src region to the temporary texture. */
1590 struct pipe_blit_info blit
;
1592 memset(&blit
, 0, sizeof(blit
));
1593 blit
.src
.resource
= rbRead
->texture
;
1594 blit
.src
.level
= rbRead
->surface
->u
.tex
.level
;
1595 blit
.src
.format
= rbRead
->texture
->format
;
1596 blit
.src
.box
.x
= readX
;
1597 blit
.src
.box
.y
= readY
;
1598 blit
.src
.box
.z
= rbRead
->surface
->u
.tex
.first_layer
;
1599 blit
.src
.box
.width
= readW
;
1600 blit
.src
.box
.height
= readH
;
1601 blit
.src
.box
.depth
= 1;
1602 blit
.dst
.resource
= pt
;
1604 blit
.dst
.format
= pt
->format
;
1605 blit
.dst
.box
.x
= pack
.SkipPixels
;
1606 blit
.dst
.box
.y
= pack
.SkipRows
;
1608 blit
.dst
.box
.width
= readW
;
1609 blit
.dst
.box
.height
= readH
;
1610 blit
.dst
.box
.depth
= 1;
1611 blit
.mask
= util_format_get_mask(pt
->format
) & ~PIPE_MASK_S
;
1612 blit
.filter
= PIPE_TEX_FILTER_NEAREST
;
1614 pipe
->blit(pipe
, &blit
);
1617 /* OK, the texture 'pt' contains the src image/pixels. Now draw a
1618 * textured quad with that texture.
1620 draw_textured_quad(ctx
, dstx
, dsty
, ctx
->Current
.RasterPos
[2],
1621 width
, height
, ctx
->Pixel
.ZoomX
, ctx
->Pixel
.ZoomY
,
1626 ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR0
],
1627 invertTex
, GL_FALSE
, GL_FALSE
);
1629 pipe_resource_reference(&pt
, NULL
);
1630 pipe_sampler_view_reference(&sv
[0], NULL
);
1635 void st_init_drawpixels_functions(struct dd_function_table
*functions
)
1637 functions
->DrawPixels
= st_DrawPixels
;
1638 functions
->CopyPixels
= st_CopyPixels
;
1643 st_destroy_drawpix(struct st_context
*st
)
1647 for (i
= 0; i
< ARRAY_SIZE(st
->drawpix
.zs_shaders
); i
++) {
1648 if (st
->drawpix
.zs_shaders
[i
])
1649 cso_delete_fragment_shader(st
->cso_context
,
1650 st
->drawpix
.zs_shaders
[i
]);
1653 if (st
->drawpix
.vert_shaders
[0])
1654 cso_delete_vertex_shader(st
->cso_context
, st
->drawpix
.vert_shaders
[0]);
1655 if (st
->drawpix
.vert_shaders
[1])
1656 cso_delete_vertex_shader(st
->cso_context
, st
->drawpix
.vert_shaders
[1]);