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/macros.h"
39 #include "main/mtypes.h"
40 #include "main/pack.h"
42 #include "main/readpix.h"
43 #include "main/texformat.h"
44 #include "main/teximage.h"
45 #include "main/texstore.h"
46 #include "main/glformats.h"
47 #include "program/program.h"
48 #include "program/prog_print.h"
49 #include "program/prog_instruction.h"
52 #include "st_atom_constbuf.h"
53 #include "st_cb_drawpixels.h"
54 #include "st_cb_readpixels.h"
55 #include "st_cb_fbo.h"
56 #include "st_context.h"
58 #include "st_format.h"
59 #include "st_program.h"
60 #include "st_texture.h"
62 #include "pipe/p_context.h"
63 #include "pipe/p_defines.h"
64 #include "tgsi/tgsi_ureg.h"
65 #include "util/u_draw_quad.h"
66 #include "util/u_format.h"
67 #include "util/u_inlines.h"
68 #include "util/u_math.h"
69 #include "util/u_tile.h"
70 #include "util/u_upload_mgr.h"
71 #include "cso_cache/cso_context.h"
75 * Check if the given program is:
76 * 0: MOVE result.color, fragment.color;
80 is_passthrough_program(const struct gl_fragment_program
*prog
)
82 if (prog
->Base
.NumInstructions
== 2) {
83 const struct prog_instruction
*inst
= prog
->Base
.Instructions
;
84 if (inst
[0].Opcode
== OPCODE_MOV
&&
85 inst
[1].Opcode
== OPCODE_END
&&
86 inst
[0].DstReg
.File
== PROGRAM_OUTPUT
&&
87 inst
[0].DstReg
.Index
== FRAG_RESULT_COLOR
&&
88 inst
[0].DstReg
.WriteMask
== WRITEMASK_XYZW
&&
89 inst
[0].SrcReg
[0].File
== PROGRAM_INPUT
&&
90 inst
[0].SrcReg
[0].Index
== VARYING_SLOT_COL0
&&
91 inst
[0].SrcReg
[0].Swizzle
== SWIZZLE_XYZW
) {
100 * Returns a fragment program which implements the current pixel transfer ops.
102 static struct gl_fragment_program
*
103 get_glsl_pixel_transfer_program(struct st_context
*st
,
104 struct st_fragment_program
*orig
)
106 int pixelMaps
= 0, scaleAndBias
= 0;
107 struct gl_context
*ctx
= st
->ctx
;
108 struct st_fragment_program
*fp
= (struct st_fragment_program
*)
109 ctx
->Driver
.NewProgram(ctx
, GL_FRAGMENT_PROGRAM_ARB
, 0);
114 if (ctx
->Pixel
.RedBias
!= 0.0 || ctx
->Pixel
.RedScale
!= 1.0 ||
115 ctx
->Pixel
.GreenBias
!= 0.0 || ctx
->Pixel
.GreenScale
!= 1.0 ||
116 ctx
->Pixel
.BlueBias
!= 0.0 || ctx
->Pixel
.BlueScale
!= 1.0 ||
117 ctx
->Pixel
.AlphaBias
!= 0.0 || ctx
->Pixel
.AlphaScale
!= 1.0) {
121 pixelMaps
= ctx
->Pixel
.MapColorFlag
;
124 /* create the colormap/texture now if not already done */
125 if (!st
->pixel_xfer
.pixelmap_texture
) {
126 st
->pixel_xfer
.pixelmap_texture
= st_create_color_map_texture(ctx
);
127 st
->pixel_xfer
.pixelmap_sampler_view
=
128 st_create_texture_sampler_view(st
->pipe
,
129 st
->pixel_xfer
.pixelmap_texture
);
133 get_pixel_transfer_visitor(fp
, orig
->glsl_to_tgsi
,
134 scaleAndBias
, pixelMaps
);
141 * Make fragment shader for glDraw/CopyPixels. This shader is made
142 * by combining the pixel transfer shader with the user-defined shader.
143 * \param fpIn the current/incoming fragment program
144 * \param fpOut returns the combined fragment program
147 st_make_drawpix_fragment_program(struct st_context
*st
,
148 struct gl_fragment_program
*fpIn
,
149 struct gl_fragment_program
**fpOut
)
151 struct gl_program
*newProg
;
152 struct st_fragment_program
*stfp
= (struct st_fragment_program
*) fpIn
;
154 if (is_passthrough_program(fpIn
)) {
155 newProg
= (struct gl_program
*) _mesa_clone_fragment_program(st
->ctx
,
156 &st
->pixel_xfer
.program
->Base
);
158 else if (stfp
->glsl_to_tgsi
!= NULL
) {
159 newProg
= (struct gl_program
*) get_glsl_pixel_transfer_program(st
, stfp
);
164 printf("Base program:\n");
165 _mesa_print_program(&fpIn
->Base
);
166 printf("DrawPix program:\n");
167 _mesa_print_program(&st
->pixel_xfer
.program
->Base
.Base
);
169 newProg
= _mesa_combine_programs(st
->ctx
,
170 &st
->pixel_xfer
.program
->Base
.Base
,
176 printf("Combined DrawPixels program:\n");
177 _mesa_print_program(newProg
);
178 printf("InputsRead: 0x%x\n", newProg
->InputsRead
);
179 printf("OutputsWritten: 0x%x\n", newProg
->OutputsWritten
);
180 _mesa_print_parameter_list(newProg
->Parameters
);
183 *fpOut
= (struct gl_fragment_program
*) newProg
;
188 * Create fragment program that does a TEX() instruction to get a Z and/or
189 * stencil value value, then writes to FRAG_RESULT_DEPTH/FRAG_RESULT_STENCIL.
190 * Used for glDrawPixels(GL_DEPTH_COMPONENT / GL_STENCIL_INDEX).
191 * Pass fragment color through as-is.
192 * \return pointer to the gl_fragment program
194 struct gl_fragment_program
*
195 st_make_drawpix_z_stencil_program(struct st_context
*st
,
196 GLboolean write_depth
,
197 GLboolean write_stencil
)
199 struct gl_context
*ctx
= st
->ctx
;
200 struct gl_program
*p
;
201 struct gl_fragment_program
*fp
;
203 const GLuint shaderIndex
= write_depth
* 2 + write_stencil
;
205 assert(shaderIndex
< ARRAY_SIZE(st
->drawpix
.shaders
));
207 if (st
->drawpix
.shaders
[shaderIndex
]) {
208 /* already have the proper shader */
209 return st
->drawpix
.shaders
[shaderIndex
];
215 p
= ctx
->Driver
.NewProgram(ctx
, GL_FRAGMENT_PROGRAM_ARB
, 0);
219 p
->NumInstructions
= write_depth
? 3 : 1;
220 p
->NumInstructions
+= write_stencil
? 1 : 0;
222 p
->Instructions
= _mesa_alloc_instructions(p
->NumInstructions
);
223 if (!p
->Instructions
) {
224 ctx
->Driver
.DeleteProgram(ctx
, p
);
227 _mesa_init_instructions(p
->Instructions
, p
->NumInstructions
);
230 /* TEX result.depth, fragment.texcoord[0], texture[0], 2D; */
231 p
->Instructions
[ic
].Opcode
= OPCODE_TEX
;
232 p
->Instructions
[ic
].DstReg
.File
= PROGRAM_OUTPUT
;
233 p
->Instructions
[ic
].DstReg
.Index
= FRAG_RESULT_DEPTH
;
234 p
->Instructions
[ic
].DstReg
.WriteMask
= WRITEMASK_Z
;
235 p
->Instructions
[ic
].SrcReg
[0].File
= PROGRAM_INPUT
;
236 p
->Instructions
[ic
].SrcReg
[0].Index
= VARYING_SLOT_TEX0
;
237 p
->Instructions
[ic
].TexSrcUnit
= 0;
238 p
->Instructions
[ic
].TexSrcTarget
= TEXTURE_2D_INDEX
;
240 /* MOV result.color, fragment.color; */
241 p
->Instructions
[ic
].Opcode
= OPCODE_MOV
;
242 p
->Instructions
[ic
].DstReg
.File
= PROGRAM_OUTPUT
;
243 p
->Instructions
[ic
].DstReg
.Index
= FRAG_RESULT_COLOR
;
244 p
->Instructions
[ic
].SrcReg
[0].File
= PROGRAM_INPUT
;
245 p
->Instructions
[ic
].SrcReg
[0].Index
= VARYING_SLOT_COL0
;
250 /* TEX result.stencil, fragment.texcoord[0], texture[0], 2D; */
251 p
->Instructions
[ic
].Opcode
= OPCODE_TEX
;
252 p
->Instructions
[ic
].DstReg
.File
= PROGRAM_OUTPUT
;
253 p
->Instructions
[ic
].DstReg
.Index
= FRAG_RESULT_STENCIL
;
254 p
->Instructions
[ic
].DstReg
.WriteMask
= WRITEMASK_Y
;
255 p
->Instructions
[ic
].SrcReg
[0].File
= PROGRAM_INPUT
;
256 p
->Instructions
[ic
].SrcReg
[0].Index
= VARYING_SLOT_TEX0
;
257 p
->Instructions
[ic
].TexSrcUnit
= 1;
258 p
->Instructions
[ic
].TexSrcTarget
= TEXTURE_2D_INDEX
;
263 p
->Instructions
[ic
++].Opcode
= OPCODE_END
;
265 assert(ic
== p
->NumInstructions
);
267 p
->InputsRead
= VARYING_BIT_TEX0
| VARYING_BIT_COL0
;
268 p
->OutputsWritten
= 0;
270 p
->OutputsWritten
|= BITFIELD64_BIT(FRAG_RESULT_DEPTH
);
271 p
->OutputsWritten
|= BITFIELD64_BIT(FRAG_RESULT_COLOR
);
274 p
->OutputsWritten
|= BITFIELD64_BIT(FRAG_RESULT_STENCIL
);
276 p
->SamplersUsed
= 0x1; /* sampler 0 (bit 0) is used */
278 p
->SamplersUsed
|= 1 << 1;
280 fp
= (struct gl_fragment_program
*) p
;
282 /* save the new shader */
283 st
->drawpix
.shaders
[shaderIndex
] = fp
;
290 * Create a simple vertex shader that just passes through the
291 * vertex position and texcoord (and optionally, color).
294 make_passthrough_vertex_shader(struct st_context
*st
,
297 const unsigned texcoord_semantic
= st
->needs_texcoord_semantic
?
298 TGSI_SEMANTIC_TEXCOORD
: TGSI_SEMANTIC_GENERIC
;
300 if (!st
->drawpix
.vert_shaders
[passColor
]) {
301 struct ureg_program
*ureg
= ureg_create( TGSI_PROCESSOR_VERTEX
);
306 /* MOV result.pos, vertex.pos; */
308 ureg_DECL_output( ureg
, TGSI_SEMANTIC_POSITION
, 0 ),
309 ureg_DECL_vs_input( ureg
, 0 ));
311 /* MOV result.texcoord0, vertex.attr[1]; */
313 ureg_DECL_output( ureg
, texcoord_semantic
, 0 ),
314 ureg_DECL_vs_input( ureg
, 1 ));
317 /* MOV result.color0, vertex.attr[2]; */
319 ureg_DECL_output( ureg
, TGSI_SEMANTIC_COLOR
, 0 ),
320 ureg_DECL_vs_input( ureg
, 2 ));
325 st
->drawpix
.vert_shaders
[passColor
] =
326 ureg_create_shader_and_destroy( ureg
, st
->pipe
);
329 return st
->drawpix
.vert_shaders
[passColor
];
334 * Return a texture internalFormat for drawing/copying an image
335 * of the given format and type.
338 internal_format(struct gl_context
*ctx
, GLenum format
, GLenum type
)
341 case GL_DEPTH_COMPONENT
:
343 case GL_UNSIGNED_SHORT
:
344 return GL_DEPTH_COMPONENT16
;
346 case GL_UNSIGNED_INT
:
347 return GL_DEPTH_COMPONENT32
;
350 if (ctx
->Extensions
.ARB_depth_buffer_float
)
351 return GL_DEPTH_COMPONENT32F
;
353 return GL_DEPTH_COMPONENT
;
356 return GL_DEPTH_COMPONENT
;
359 case GL_DEPTH_STENCIL
:
361 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV
:
362 return GL_DEPTH32F_STENCIL8
;
364 case GL_UNSIGNED_INT_24_8
:
366 return GL_DEPTH24_STENCIL8
;
369 case GL_STENCIL_INDEX
:
370 return GL_STENCIL_INDEX
;
373 if (_mesa_is_enum_format_integer(format
)) {
377 case GL_UNSIGNED_BYTE
:
381 case GL_UNSIGNED_SHORT
:
385 case GL_UNSIGNED_INT
:
388 assert(0 && "Unexpected type in internal_format()");
389 return GL_RGBA_INTEGER
;
394 case GL_UNSIGNED_BYTE
:
395 case GL_UNSIGNED_INT_8_8_8_8
:
396 case GL_UNSIGNED_INT_8_8_8_8_REV
:
400 case GL_UNSIGNED_BYTE_3_3_2
:
401 case GL_UNSIGNED_BYTE_2_3_3_REV
:
404 case GL_UNSIGNED_SHORT_4_4_4_4
:
405 case GL_UNSIGNED_SHORT_4_4_4_4_REV
:
408 case GL_UNSIGNED_SHORT_5_6_5
:
409 case GL_UNSIGNED_SHORT_5_6_5_REV
:
412 case GL_UNSIGNED_SHORT_5_5_5_1
:
413 case GL_UNSIGNED_SHORT_1_5_5_5_REV
:
416 case GL_UNSIGNED_INT_10_10_10_2
:
417 case GL_UNSIGNED_INT_2_10_10_10_REV
:
420 case GL_UNSIGNED_SHORT
:
421 case GL_UNSIGNED_INT
:
426 ctx
->Extensions
.EXT_texture_snorm
? GL_RGBA8_SNORM
: GL_RGBA8
;
431 ctx
->Extensions
.EXT_texture_snorm
? GL_RGBA16_SNORM
: GL_RGBA16
;
433 case GL_HALF_FLOAT_ARB
:
435 ctx
->Extensions
.ARB_texture_float
? GL_RGBA16F
:
436 ctx
->Extensions
.EXT_texture_snorm
? GL_RGBA16_SNORM
: GL_RGBA16
;
441 ctx
->Extensions
.ARB_texture_float
? GL_RGBA32F
:
442 ctx
->Extensions
.EXT_texture_snorm
? GL_RGBA16_SNORM
: GL_RGBA16
;
444 case GL_UNSIGNED_INT_5_9_9_9_REV
:
445 assert(ctx
->Extensions
.EXT_texture_shared_exponent
);
448 case GL_UNSIGNED_INT_10F_11F_11F_REV
:
449 assert(ctx
->Extensions
.EXT_packed_float
);
450 return GL_R11F_G11F_B10F
;
458 * Create a temporary texture to hold an image of the given size.
459 * If width, height are not POT and the driver only handles POT textures,
460 * allocate the next larger size of texture that is POT.
462 static struct pipe_resource
*
463 alloc_texture(struct st_context
*st
, GLsizei width
, GLsizei height
,
464 enum pipe_format texFormat
, unsigned bind
)
466 struct pipe_resource
*pt
;
468 pt
= st_texture_create(st
, st
->internal_target
, texFormat
, 0,
469 width
, height
, 1, 1, 0, bind
);
476 * Make texture containing an image for glDrawPixels image.
477 * If 'pixels' is NULL, leave the texture image data undefined.
479 static struct pipe_resource
*
480 make_texture(struct st_context
*st
,
481 GLsizei width
, GLsizei height
, GLenum format
, GLenum type
,
482 const struct gl_pixelstore_attrib
*unpack
,
483 const GLvoid
*pixels
)
485 struct gl_context
*ctx
= st
->ctx
;
486 struct pipe_context
*pipe
= st
->pipe
;
488 struct pipe_resource
*pt
;
489 enum pipe_format pipeFormat
;
490 GLenum baseInternalFormat
;
492 /* Choose a pixel format for the temp texture which will hold the
495 pipeFormat
= st_choose_matching_format(st
, PIPE_BIND_SAMPLER_VIEW
,
496 format
, type
, unpack
->SwapBytes
);
498 if (pipeFormat
== PIPE_FORMAT_NONE
) {
499 /* Use the generic approach. */
500 GLenum intFormat
= internal_format(ctx
, format
, type
);
502 pipeFormat
= st_choose_format(st
, intFormat
, format
, type
,
503 PIPE_TEXTURE_2D
, 0, PIPE_BIND_SAMPLER_VIEW
,
505 assert(pipeFormat
!= PIPE_FORMAT_NONE
);
508 mformat
= st_pipe_format_to_mesa_format(pipeFormat
);
509 baseInternalFormat
= _mesa_get_format_base_format(mformat
);
511 pixels
= _mesa_map_pbo_source(ctx
, unpack
, pixels
);
515 /* alloc temporary texture */
516 pt
= alloc_texture(st
, width
, height
, pipeFormat
, PIPE_BIND_SAMPLER_VIEW
);
518 _mesa_unmap_pbo_source(ctx
, unpack
);
523 struct pipe_transfer
*transfer
;
526 const GLbitfield imageTransferStateSave
= ctx
->_ImageTransferState
;
528 /* we'll do pixel transfer in a fragment shader */
529 ctx
->_ImageTransferState
= 0x0;
531 /* map texture transfer */
532 dest
= pipe_transfer_map(pipe
, pt
, 0, 0,
533 PIPE_TRANSFER_WRITE
, 0, 0,
534 width
, height
, &transfer
);
537 /* Put image into texture transfer.
538 * Note that the image is actually going to be upside down in
539 * the texture. We deal with that with texcoords.
541 success
= _mesa_texstore(ctx
, 2, /* dims */
542 baseInternalFormat
, /* baseInternalFormat */
543 mformat
, /* mesa_format */
544 transfer
->stride
, /* dstRowStride, bytes */
545 &dest
, /* destSlices */
546 width
, height
, 1, /* size */
547 format
, type
, /* src format/type */
548 pixels
, /* data source */
552 pipe_transfer_unmap(pipe
, transfer
);
557 ctx
->_ImageTransferState
= imageTransferStateSave
;
560 _mesa_unmap_pbo_source(ctx
, unpack
);
567 * Draw quad with texcoords and optional color.
568 * Coords are gallium window coords with y=0=top.
569 * \param color may be null
570 * \param invertTex if true, flip texcoords vertically
573 draw_quad(struct gl_context
*ctx
, GLfloat x0
, GLfloat y0
, GLfloat z
,
574 GLfloat x1
, GLfloat y1
, const GLfloat
*color
,
575 GLboolean invertTex
, GLfloat maxXcoord
, GLfloat maxYcoord
)
577 struct st_context
*st
= st_context(ctx
);
578 struct pipe_context
*pipe
= st
->pipe
;
579 GLfloat (*verts
)[3][4]; /* four verts, three attribs, XYZW */
580 struct pipe_resource
*buf
= NULL
;
583 if (u_upload_alloc(st
->uploader
, 0, 4 * sizeof(verts
[0]), &offset
,
584 &buf
, (void **) &verts
) != PIPE_OK
) {
588 /* setup vertex data */
590 const struct gl_framebuffer
*fb
= st
->ctx
->DrawBuffer
;
591 const GLfloat fb_width
= (GLfloat
) fb
->Width
;
592 const GLfloat fb_height
= (GLfloat
) fb
->Height
;
593 const GLfloat clip_x0
= x0
/ fb_width
* 2.0f
- 1.0f
;
594 const GLfloat clip_y0
= y0
/ fb_height
* 2.0f
- 1.0f
;
595 const GLfloat clip_x1
= x1
/ fb_width
* 2.0f
- 1.0f
;
596 const GLfloat clip_y1
= y1
/ fb_height
* 2.0f
- 1.0f
;
597 const GLfloat sLeft
= 0.0f
, sRight
= maxXcoord
;
598 const GLfloat tTop
= invertTex
? maxYcoord
: 0.0f
;
599 const GLfloat tBot
= invertTex
? 0.0f
: maxYcoord
;
603 verts
[0][0][0] = clip_x0
; /* v[0].attr[0].x */
604 verts
[0][0][1] = clip_y0
; /* v[0].attr[0].y */
607 verts
[1][0][0] = clip_x1
;
608 verts
[1][0][1] = clip_y0
;
611 verts
[2][0][0] = clip_x1
;
612 verts
[2][0][1] = clip_y1
;
615 verts
[3][0][0] = clip_x0
;
616 verts
[3][0][1] = clip_y1
;
618 verts
[0][1][0] = sLeft
; /* v[0].attr[1].S */
619 verts
[0][1][1] = tTop
; /* v[0].attr[1].T */
620 verts
[1][1][0] = sRight
;
621 verts
[1][1][1] = tTop
;
622 verts
[2][1][0] = sRight
;
623 verts
[2][1][1] = tBot
;
624 verts
[3][1][0] = sLeft
;
625 verts
[3][1][1] = tBot
;
627 /* same for all verts: */
629 for (i
= 0; i
< 4; i
++) {
630 verts
[i
][0][2] = z
; /* v[i].attr[0].z */
631 verts
[i
][0][3] = 1.0f
; /* v[i].attr[0].w */
632 verts
[i
][2][0] = color
[0]; /* v[i].attr[2].r */
633 verts
[i
][2][1] = color
[1]; /* v[i].attr[2].g */
634 verts
[i
][2][2] = color
[2]; /* v[i].attr[2].b */
635 verts
[i
][2][3] = color
[3]; /* v[i].attr[2].a */
636 verts
[i
][1][2] = 0.0f
; /* v[i].attr[1].R */
637 verts
[i
][1][3] = 1.0f
; /* v[i].attr[1].Q */
641 for (i
= 0; i
< 4; i
++) {
642 verts
[i
][0][2] = z
; /*Z*/
643 verts
[i
][0][3] = 1.0f
; /*W*/
644 verts
[i
][1][2] = 0.0f
; /*R*/
645 verts
[i
][1][3] = 1.0f
; /*Q*/
650 u_upload_unmap(st
->uploader
);
651 util_draw_vertex_buffer(pipe
, st
->cso_context
, buf
,
652 cso_get_aux_vertex_buffer_slot(st
->cso_context
),
656 3); /* attribs/vert */
657 pipe_resource_reference(&buf
, NULL
);
663 draw_textured_quad(struct gl_context
*ctx
, GLint x
, GLint y
, GLfloat z
,
664 GLsizei width
, GLsizei height
,
665 GLfloat zoomX
, GLfloat zoomY
,
666 struct pipe_sampler_view
**sv
,
667 int num_sampler_view
,
670 const GLfloat
*color
,
672 GLboolean write_depth
, GLboolean write_stencil
)
674 struct st_context
*st
= st_context(ctx
);
675 struct pipe_context
*pipe
= st
->pipe
;
676 struct cso_context
*cso
= st
->cso_context
;
677 GLfloat x0
, y0
, x1
, y1
;
679 boolean normalized
= sv
[0]->texture
->target
!= PIPE_TEXTURE_RECT
;
682 /* XXX if DrawPixels image is larger than max texture size, break
685 maxSize
= 1 << (pipe
->screen
->get_param(pipe
->screen
,
686 PIPE_CAP_MAX_TEXTURE_2D_LEVELS
) - 1);
687 assert(width
<= maxSize
);
688 assert(height
<= maxSize
);
690 cso_save_rasterizer(cso
);
691 cso_save_viewport(cso
);
692 cso_save_samplers(cso
, PIPE_SHADER_FRAGMENT
);
693 cso_save_sampler_views(cso
, PIPE_SHADER_FRAGMENT
);
694 cso_save_fragment_shader(cso
);
695 cso_save_stream_outputs(cso
);
696 cso_save_vertex_shader(cso
);
697 cso_save_tessctrl_shader(cso
);
698 cso_save_tesseval_shader(cso
);
699 cso_save_geometry_shader(cso
);
700 cso_save_vertex_elements(cso
);
701 cso_save_aux_vertex_buffer_slot(cso
);
703 cso_save_depth_stencil_alpha(cso
);
707 /* rasterizer state: just scissor */
709 struct pipe_rasterizer_state rasterizer
;
710 memset(&rasterizer
, 0, sizeof(rasterizer
));
711 rasterizer
.clamp_fragment_color
= !st
->clamp_frag_color_in_shader
&&
712 ctx
->Color
._ClampFragmentColor
;
713 rasterizer
.half_pixel_center
= 1;
714 rasterizer
.bottom_edge_rule
= 1;
715 rasterizer
.depth_clip
= !ctx
->Transform
.DepthClamp
;
716 rasterizer
.scissor
= ctx
->Scissor
.EnableFlags
;
717 cso_set_rasterizer(cso
, &rasterizer
);
721 /* Stencil writing bypasses the normal fragment pipeline to
722 * disable color writing and set stencil test to always pass.
724 struct pipe_depth_stencil_alpha_state dsa
;
725 struct pipe_blend_state blend
;
728 memset(&dsa
, 0, sizeof(dsa
));
729 dsa
.stencil
[0].enabled
= 1;
730 dsa
.stencil
[0].func
= PIPE_FUNC_ALWAYS
;
731 dsa
.stencil
[0].writemask
= ctx
->Stencil
.WriteMask
[0] & 0xff;
732 dsa
.stencil
[0].zpass_op
= PIPE_STENCIL_OP_REPLACE
;
734 /* writing depth+stencil: depth test always passes */
735 dsa
.depth
.enabled
= 1;
736 dsa
.depth
.writemask
= ctx
->Depth
.Mask
;
737 dsa
.depth
.func
= PIPE_FUNC_ALWAYS
;
739 cso_set_depth_stencil_alpha(cso
, &dsa
);
741 /* blend (colormask) */
742 memset(&blend
, 0, sizeof(blend
));
743 cso_set_blend(cso
, &blend
);
746 /* fragment shader state: TEX lookup program */
747 cso_set_fragment_shader_handle(cso
, driver_fp
);
749 /* vertex shader state: position + texcoord pass-through */
750 cso_set_vertex_shader_handle(cso
, driver_vp
);
752 /* disable other shaders */
753 cso_set_tessctrl_shader_handle(cso
, NULL
);
754 cso_set_tesseval_shader_handle(cso
, NULL
);
755 cso_set_geometry_shader_handle(cso
, NULL
);
757 /* texture sampling state: */
759 struct pipe_sampler_state sampler
;
760 memset(&sampler
, 0, sizeof(sampler
));
761 sampler
.wrap_s
= PIPE_TEX_WRAP_CLAMP
;
762 sampler
.wrap_t
= PIPE_TEX_WRAP_CLAMP
;
763 sampler
.wrap_r
= PIPE_TEX_WRAP_CLAMP
;
764 sampler
.min_img_filter
= PIPE_TEX_FILTER_NEAREST
;
765 sampler
.min_mip_filter
= PIPE_TEX_MIPFILTER_NONE
;
766 sampler
.mag_img_filter
= PIPE_TEX_FILTER_NEAREST
;
767 sampler
.normalized_coords
= normalized
;
769 cso_single_sampler(cso
, PIPE_SHADER_FRAGMENT
, 0, &sampler
);
770 if (num_sampler_view
> 1) {
771 cso_single_sampler(cso
, PIPE_SHADER_FRAGMENT
, 1, &sampler
);
773 cso_single_sampler_done(cso
, PIPE_SHADER_FRAGMENT
);
776 /* viewport state: viewport matching window dims */
778 const float w
= (float) ctx
->DrawBuffer
->Width
;
779 const float h
= (float) ctx
->DrawBuffer
->Height
;
780 struct pipe_viewport_state vp
;
781 vp
.scale
[0] = 0.5f
* w
;
782 vp
.scale
[1] = -0.5f
* h
;
784 vp
.translate
[0] = 0.5f
* w
;
785 vp
.translate
[1] = 0.5f
* h
;
786 vp
.translate
[2] = 0.5f
;
787 cso_set_viewport(cso
, &vp
);
790 cso_set_vertex_elements(cso
, 3, st
->velems_util_draw
);
791 cso_set_stream_outputs(st
->cso_context
, 0, NULL
, NULL
);
794 cso_set_sampler_views(cso
, PIPE_SHADER_FRAGMENT
, num_sampler_view
, sv
);
796 /* Compute Gallium window coords (y=0=top) with pixel zoom.
797 * Recall that these coords are transformed by the current
798 * vertex shader and viewport transformation.
800 if (st_fb_orientation(ctx
->DrawBuffer
) == Y_0_BOTTOM
) {
801 y
= ctx
->DrawBuffer
->Height
- (int) (y
+ height
* ctx
->Pixel
.ZoomY
);
802 invertTex
= !invertTex
;
806 x1
= x
+ width
* ctx
->Pixel
.ZoomX
;
808 y1
= y
+ height
* ctx
->Pixel
.ZoomY
;
810 /* convert Z from [0,1] to [-1,-1] to match viewport Z scale/bias */
813 draw_quad(ctx
, x0
, y0
, z
, x1
, y1
, color
, invertTex
,
814 normalized
? ((GLfloat
) width
/ sv
[0]->texture
->width0
) : (GLfloat
)width
,
815 normalized
? ((GLfloat
) height
/ sv
[0]->texture
->height0
) : (GLfloat
)height
);
818 cso_restore_rasterizer(cso
);
819 cso_restore_viewport(cso
);
820 cso_restore_samplers(cso
, PIPE_SHADER_FRAGMENT
);
821 cso_restore_sampler_views(cso
, PIPE_SHADER_FRAGMENT
);
822 cso_restore_fragment_shader(cso
);
823 cso_restore_vertex_shader(cso
);
824 cso_restore_tessctrl_shader(cso
);
825 cso_restore_tesseval_shader(cso
);
826 cso_restore_geometry_shader(cso
);
827 cso_restore_vertex_elements(cso
);
828 cso_restore_aux_vertex_buffer_slot(cso
);
829 cso_restore_stream_outputs(cso
);
831 cso_restore_depth_stencil_alpha(cso
);
832 cso_restore_blend(cso
);
838 * Software fallback to do glDrawPixels(GL_STENCIL_INDEX) when we
839 * can't use a fragment shader to write stencil values.
842 draw_stencil_pixels(struct gl_context
*ctx
, GLint x
, GLint y
,
843 GLsizei width
, GLsizei height
, GLenum format
, GLenum type
,
844 const struct gl_pixelstore_attrib
*unpack
,
845 const GLvoid
*pixels
)
847 struct st_context
*st
= st_context(ctx
);
848 struct pipe_context
*pipe
= st
->pipe
;
849 struct st_renderbuffer
*strb
;
850 enum pipe_transfer_usage usage
;
851 struct pipe_transfer
*pt
;
852 const GLboolean zoom
= ctx
->Pixel
.ZoomX
!= 1.0 || ctx
->Pixel
.ZoomY
!= 1.0;
854 struct gl_pixelstore_attrib clippedUnpack
= *unpack
;
859 if (!_mesa_clip_drawpixels(ctx
, &x
, &y
, &width
, &height
,
861 /* totally clipped */
866 strb
= st_renderbuffer(ctx
->DrawBuffer
->
867 Attachment
[BUFFER_STENCIL
].Renderbuffer
);
869 if (st_fb_orientation(ctx
->DrawBuffer
) == Y_0_TOP
) {
870 y
= ctx
->DrawBuffer
->Height
- y
- height
;
873 if (format
== GL_STENCIL_INDEX
&&
874 _mesa_is_format_packed_depth_stencil(strb
->Base
.Format
)) {
875 /* writing stencil to a combined depth+stencil buffer */
876 usage
= PIPE_TRANSFER_READ_WRITE
;
879 usage
= PIPE_TRANSFER_WRITE
;
882 stmap
= pipe_transfer_map(pipe
, strb
->texture
,
883 strb
->surface
->u
.tex
.level
,
884 strb
->surface
->u
.tex
.first_layer
,
888 pixels
= _mesa_map_pbo_source(ctx
, &clippedUnpack
, pixels
);
891 sValues
= malloc(width
* sizeof(GLubyte
));
892 zValues
= malloc(width
* sizeof(GLuint
));
894 if (sValues
&& zValues
) {
896 for (row
= 0; row
< height
; row
++) {
897 GLfloat
*zValuesFloat
= (GLfloat
*)zValues
;
898 GLenum destType
= GL_UNSIGNED_BYTE
;
899 const GLvoid
*source
= _mesa_image_address2d(&clippedUnpack
, pixels
,
903 _mesa_unpack_stencil_span(ctx
, width
, destType
, sValues
,
904 type
, source
, &clippedUnpack
,
905 ctx
->_ImageTransferState
);
907 if (format
== GL_DEPTH_STENCIL
) {
909 pt
->resource
->format
== PIPE_FORMAT_Z32_FLOAT_S8X24_UINT
?
910 GL_FLOAT
: GL_UNSIGNED_INT
;
912 _mesa_unpack_depth_span(ctx
, width
, ztype
, zValues
,
913 (1 << 24) - 1, type
, source
,
918 _mesa_problem(ctx
, "Gallium glDrawPixels(GL_STENCIL) with "
919 "zoom not complete");
925 if (st_fb_orientation(ctx
->DrawBuffer
) == Y_0_TOP
) {
926 spanY
= height
- row
- 1;
932 /* now pack the stencil (and Z) values in the dest format */
933 switch (pt
->resource
->format
) {
934 case PIPE_FORMAT_S8_UINT
:
936 ubyte
*dest
= stmap
+ spanY
* pt
->stride
;
937 assert(usage
== PIPE_TRANSFER_WRITE
);
938 memcpy(dest
, sValues
, width
);
941 case PIPE_FORMAT_Z24_UNORM_S8_UINT
:
942 if (format
== GL_DEPTH_STENCIL
) {
943 uint
*dest
= (uint
*) (stmap
+ spanY
* pt
->stride
);
945 assert(usage
== PIPE_TRANSFER_WRITE
);
946 for (k
= 0; k
< width
; k
++) {
947 dest
[k
] = zValues
[k
] | (sValues
[k
] << 24);
951 uint
*dest
= (uint
*) (stmap
+ spanY
* pt
->stride
);
953 assert(usage
== PIPE_TRANSFER_READ_WRITE
);
954 for (k
= 0; k
< width
; k
++) {
955 dest
[k
] = (dest
[k
] & 0xffffff) | (sValues
[k
] << 24);
959 case PIPE_FORMAT_S8_UINT_Z24_UNORM
:
960 if (format
== GL_DEPTH_STENCIL
) {
961 uint
*dest
= (uint
*) (stmap
+ spanY
* pt
->stride
);
963 assert(usage
== PIPE_TRANSFER_WRITE
);
964 for (k
= 0; k
< width
; k
++) {
965 dest
[k
] = (zValues
[k
] << 8) | (sValues
[k
] & 0xff);
969 uint
*dest
= (uint
*) (stmap
+ spanY
* pt
->stride
);
971 assert(usage
== PIPE_TRANSFER_READ_WRITE
);
972 for (k
= 0; k
< width
; k
++) {
973 dest
[k
] = (dest
[k
] & 0xffffff00) | (sValues
[k
] & 0xff);
977 case PIPE_FORMAT_Z32_FLOAT_S8X24_UINT
:
978 if (format
== GL_DEPTH_STENCIL
) {
979 uint
*dest
= (uint
*) (stmap
+ spanY
* pt
->stride
);
980 GLfloat
*destf
= (GLfloat
*)dest
;
982 assert(usage
== PIPE_TRANSFER_WRITE
);
983 for (k
= 0; k
< width
; k
++) {
984 destf
[k
*2] = zValuesFloat
[k
];
985 dest
[k
*2+1] = sValues
[k
] & 0xff;
989 uint
*dest
= (uint
*) (stmap
+ spanY
* pt
->stride
);
991 assert(usage
== PIPE_TRANSFER_READ_WRITE
);
992 for (k
= 0; k
< width
; k
++) {
993 dest
[k
*2+1] = sValues
[k
] & 0xff;
1004 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glDrawPixels()");
1010 _mesa_unmap_pbo_source(ctx
, &clippedUnpack
);
1012 /* unmap the stencil buffer */
1013 pipe_transfer_unmap(pipe
, pt
);
1018 * Get fragment program variant for a glDrawPixels or glCopyPixels
1019 * command for RGBA data.
1021 static struct st_fp_variant
*
1022 get_color_fp_variant(struct st_context
*st
)
1024 struct gl_context
*ctx
= st
->ctx
;
1025 struct st_fp_variant_key key
;
1026 struct st_fp_variant
*fpv
;
1028 memset(&key
, 0, sizeof(key
));
1032 key
.scaleAndBias
= (ctx
->Pixel
.RedBias
!= 0.0 ||
1033 ctx
->Pixel
.RedScale
!= 1.0 ||
1034 ctx
->Pixel
.GreenBias
!= 0.0 ||
1035 ctx
->Pixel
.GreenScale
!= 1.0 ||
1036 ctx
->Pixel
.BlueBias
!= 0.0 ||
1037 ctx
->Pixel
.BlueScale
!= 1.0 ||
1038 ctx
->Pixel
.AlphaBias
!= 0.0 ||
1039 ctx
->Pixel
.AlphaScale
!= 1.0);
1040 key
.pixelMaps
= ctx
->Pixel
.MapColorFlag
;
1041 key
.clamp_color
= st
->clamp_frag_color_in_shader
&&
1042 st
->ctx
->Color
._ClampFragmentColor
;
1044 fpv
= st_get_fp_variant(st
, st
->fp
, &key
);
1051 * Get fragment program variant for a glDrawPixels or glCopyPixels
1052 * command for depth/stencil data.
1054 static struct st_fp_variant
*
1055 get_depth_stencil_fp_variant(struct st_context
*st
, GLboolean write_depth
,
1056 GLboolean write_stencil
)
1058 struct st_fp_variant_key key
;
1059 struct st_fp_variant
*fpv
;
1061 memset(&key
, 0, sizeof(key
));
1065 key
.drawpixels_z
= write_depth
;
1066 key
.drawpixels_stencil
= write_stencil
;
1068 fpv
= st_get_fp_variant(st
, st
->fp
, &key
);
1075 * Clamp glDrawPixels width and height to the maximum texture size.
1078 clamp_size(struct pipe_context
*pipe
, GLsizei
*width
, GLsizei
*height
,
1079 struct gl_pixelstore_attrib
*unpack
)
1082 1 << (pipe
->screen
->get_param(pipe
->screen
,
1083 PIPE_CAP_MAX_TEXTURE_2D_LEVELS
) - 1);
1085 if (*width
> maxSize
) {
1086 if (unpack
->RowLength
== 0)
1087 unpack
->RowLength
= *width
;
1090 if (*height
> maxSize
) {
1097 * Called via ctx->Driver.DrawPixels()
1100 st_DrawPixels(struct gl_context
*ctx
, GLint x
, GLint y
,
1101 GLsizei width
, GLsizei height
,
1102 GLenum format
, GLenum type
,
1103 const struct gl_pixelstore_attrib
*unpack
, const GLvoid
*pixels
)
1105 void *driver_vp
, *driver_fp
;
1106 struct st_context
*st
= st_context(ctx
);
1107 const GLfloat
*color
;
1108 struct pipe_context
*pipe
= st
->pipe
;
1109 GLboolean write_stencil
= GL_FALSE
, write_depth
= GL_FALSE
;
1110 struct pipe_sampler_view
*sv
[2] = { NULL
};
1111 int num_sampler_view
= 1;
1112 struct st_fp_variant
*fpv
;
1113 struct gl_pixelstore_attrib clippedUnpack
;
1115 /* Mesa state should be up to date by now */
1116 assert(ctx
->NewState
== 0x0);
1118 st_validate_state(st
);
1120 /* Limit the size of the glDrawPixels to the max texture size.
1121 * Strictly speaking, that's not correct but since we don't handle
1122 * larger images yet, this is better than crashing.
1124 clippedUnpack
= *unpack
;
1125 unpack
= &clippedUnpack
;
1126 clamp_size(st
->pipe
, &width
, &height
, &clippedUnpack
);
1128 if (format
== GL_DEPTH_STENCIL
)
1129 write_stencil
= write_depth
= GL_TRUE
;
1130 else if (format
== GL_STENCIL_INDEX
)
1131 write_stencil
= GL_TRUE
;
1132 else if (format
== GL_DEPTH_COMPONENT
)
1133 write_depth
= GL_TRUE
;
1135 if (write_stencil
&&
1136 !pipe
->screen
->get_param(pipe
->screen
, PIPE_CAP_SHADER_STENCIL_EXPORT
)) {
1137 /* software fallback */
1138 draw_stencil_pixels(ctx
, x
, y
, width
, height
, format
, type
,
1144 * Get vertex/fragment shaders
1146 if (write_depth
|| write_stencil
) {
1147 fpv
= get_depth_stencil_fp_variant(st
, write_depth
, write_stencil
);
1149 driver_fp
= fpv
->driver_shader
;
1151 driver_vp
= make_passthrough_vertex_shader(st
, GL_TRUE
);
1153 color
= ctx
->Current
.RasterColor
;
1156 fpv
= get_color_fp_variant(st
);
1158 driver_fp
= fpv
->driver_shader
;
1160 driver_vp
= make_passthrough_vertex_shader(st
, GL_FALSE
);
1163 if (st
->pixel_xfer
.pixelmap_enabled
) {
1164 pipe_sampler_view_reference(&sv
[1],
1165 st
->pixel_xfer
.pixelmap_sampler_view
);
1170 /* update fragment program constants */
1171 st_upload_constants(st
, fpv
->parameters
, PIPE_SHADER_FRAGMENT
);
1173 /* draw with textured quad */
1175 struct pipe_resource
*pt
1176 = make_texture(st
, width
, height
, format
, type
, unpack
, pixels
);
1178 sv
[0] = st_create_texture_sampler_view(st
->pipe
, pt
);
1181 /* Create a second sampler view to read stencil.
1182 * The stencil is written using the shader stencil export
1184 if (write_stencil
) {
1185 enum pipe_format stencil_format
=
1186 util_format_stencil_only(pt
->format
);
1187 /* we should not be doing pixel map/transfer (see above) */
1188 assert(num_sampler_view
== 1);
1189 sv
[1] = st_create_texture_sampler_view_format(st
->pipe
, pt
,
1194 draw_textured_quad(ctx
, x
, y
, ctx
->Current
.RasterPos
[2],
1196 ctx
->Pixel
.ZoomX
, ctx
->Pixel
.ZoomY
,
1201 color
, GL_FALSE
, write_depth
, write_stencil
);
1202 pipe_sampler_view_reference(&sv
[0], NULL
);
1203 if (num_sampler_view
> 1)
1204 pipe_sampler_view_reference(&sv
[1], NULL
);
1206 pipe_resource_reference(&pt
, NULL
);
1214 * Software fallback for glCopyPixels(GL_STENCIL).
1217 copy_stencil_pixels(struct gl_context
*ctx
, GLint srcx
, GLint srcy
,
1218 GLsizei width
, GLsizei height
,
1219 GLint dstx
, GLint dsty
)
1221 struct st_renderbuffer
*rbDraw
;
1222 struct pipe_context
*pipe
= st_context(ctx
)->pipe
;
1223 enum pipe_transfer_usage usage
;
1224 struct pipe_transfer
*ptDraw
;
1229 buffer
= malloc(width
* height
* sizeof(ubyte
));
1231 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glCopyPixels(stencil)");
1235 /* Get the dest renderbuffer */
1236 rbDraw
= st_renderbuffer(ctx
->DrawBuffer
->
1237 Attachment
[BUFFER_STENCIL
].Renderbuffer
);
1239 /* this will do stencil pixel transfer ops */
1240 _mesa_readpixels(ctx
, srcx
, srcy
, width
, height
,
1241 GL_STENCIL_INDEX
, GL_UNSIGNED_BYTE
,
1242 &ctx
->DefaultPacking
, buffer
);
1245 /* debug code: dump stencil values */
1247 for (row
= 0; row
< height
; row
++) {
1248 printf("%3d: ", row
);
1249 for (col
= 0; col
< width
; col
++) {
1250 printf("%02x ", buffer
[col
+ row
* width
]);
1256 if (_mesa_is_format_packed_depth_stencil(rbDraw
->Base
.Format
))
1257 usage
= PIPE_TRANSFER_READ_WRITE
;
1259 usage
= PIPE_TRANSFER_WRITE
;
1261 if (st_fb_orientation(ctx
->DrawBuffer
) == Y_0_TOP
) {
1262 dsty
= rbDraw
->Base
.Height
- dsty
- height
;
1265 assert(util_format_get_blockwidth(rbDraw
->texture
->format
) == 1);
1266 assert(util_format_get_blockheight(rbDraw
->texture
->format
) == 1);
1268 /* map the stencil buffer */
1269 drawMap
= pipe_transfer_map(pipe
,
1271 rbDraw
->surface
->u
.tex
.level
,
1272 rbDraw
->surface
->u
.tex
.first_layer
,
1274 width
, height
, &ptDraw
);
1277 /* XXX PixelZoom not handled yet */
1278 for (i
= 0; i
< height
; i
++) {
1285 if (st_fb_orientation(ctx
->DrawBuffer
) == Y_0_TOP
) {
1289 dst
= drawMap
+ y
* ptDraw
->stride
;
1290 src
= buffer
+ i
* width
;
1292 _mesa_pack_ubyte_stencil_row(rbDraw
->Base
.Format
, width
, src
, dst
);
1297 /* unmap the stencil buffer */
1298 pipe_transfer_unmap(pipe
, ptDraw
);
1303 * Return renderbuffer to use for reading color pixels for glCopyPixels
1305 static struct st_renderbuffer
*
1306 st_get_color_read_renderbuffer(struct gl_context
*ctx
)
1308 struct gl_framebuffer
*fb
= ctx
->ReadBuffer
;
1309 struct st_renderbuffer
*strb
=
1310 st_renderbuffer(fb
->_ColorReadBuffer
);
1317 * Try to do a glCopyPixels for simple cases with a blit by calling
1320 * We can do this when we're copying color pixels (depth/stencil
1321 * eventually) with no pixel zoom, no pixel transfer ops, no
1322 * per-fragment ops, and the src/dest regions don't overlap.
1325 blit_copy_pixels(struct gl_context
*ctx
, GLint srcx
, GLint srcy
,
1326 GLsizei width
, GLsizei height
,
1327 GLint dstx
, GLint dsty
, GLenum type
)
1329 struct st_context
*st
= st_context(ctx
);
1330 struct pipe_context
*pipe
= st
->pipe
;
1331 struct pipe_screen
*screen
= pipe
->screen
;
1332 struct gl_pixelstore_attrib pack
, unpack
;
1333 GLint readX
, readY
, readW
, readH
, drawX
, drawY
, drawW
, drawH
;
1335 if (type
== GL_COLOR
&&
1336 ctx
->Pixel
.ZoomX
== 1.0 &&
1337 ctx
->Pixel
.ZoomY
== 1.0 &&
1338 ctx
->_ImageTransferState
== 0x0 &&
1339 !ctx
->Color
.BlendEnabled
&&
1340 !ctx
->Color
.AlphaEnabled
&&
1342 !ctx
->Fog
.Enabled
&&
1343 !ctx
->Stencil
.Enabled
&&
1344 !ctx
->FragmentProgram
.Enabled
&&
1345 !ctx
->VertexProgram
.Enabled
&&
1346 !ctx
->_Shader
->CurrentProgram
[MESA_SHADER_FRAGMENT
] &&
1347 ctx
->DrawBuffer
->_NumColorDrawBuffers
== 1 &&
1348 !ctx
->Query
.CondRenderQuery
&&
1349 !ctx
->Query
.CurrentOcclusionObject
) {
1350 struct st_renderbuffer
*rbRead
, *rbDraw
;
1353 * Clip the read region against the src buffer bounds.
1354 * We'll still allocate a temporary buffer/texture for the original
1355 * src region size but we'll only read the region which is on-screen.
1356 * This may mean that we draw garbage pixels into the dest region, but
1363 pack
= ctx
->DefaultPacking
;
1364 if (!_mesa_clip_readpixels(ctx
, &readX
, &readY
, &readW
, &readH
, &pack
))
1365 return GL_TRUE
; /* all done */
1367 /* clip against dest buffer bounds and scissor box */
1368 drawX
= dstx
+ pack
.SkipPixels
;
1369 drawY
= dsty
+ pack
.SkipRows
;
1371 if (!_mesa_clip_drawpixels(ctx
, &drawX
, &drawY
, &readW
, &readH
, &unpack
))
1372 return GL_TRUE
; /* all done */
1374 readX
= readX
- pack
.SkipPixels
+ unpack
.SkipPixels
;
1375 readY
= readY
- pack
.SkipRows
+ unpack
.SkipRows
;
1380 rbRead
= st_get_color_read_renderbuffer(ctx
);
1381 rbDraw
= st_renderbuffer(ctx
->DrawBuffer
->_ColorDrawBuffers
[0]);
1383 /* Flip src/dst position depending on the orientation of buffers. */
1384 if (st_fb_orientation(ctx
->ReadBuffer
) == Y_0_TOP
) {
1385 readY
= rbRead
->Base
.Height
- readY
;
1389 if (st_fb_orientation(ctx
->DrawBuffer
) == Y_0_TOP
) {
1390 /* We can't flip the destination for pipe->blit, so we only adjust
1391 * its position and flip the source.
1393 drawY
= rbDraw
->Base
.Height
- drawY
- drawH
;
1398 if (rbRead
!= rbDraw
||
1399 !_mesa_regions_overlap(readX
, readY
, readX
+ readW
, readY
+ readH
,
1400 drawX
, drawY
, drawX
+ drawW
, drawY
+ drawH
)) {
1401 struct pipe_blit_info blit
;
1403 memset(&blit
, 0, sizeof(blit
));
1404 blit
.src
.resource
= rbRead
->texture
;
1405 blit
.src
.level
= rbRead
->surface
->u
.tex
.level
;
1406 blit
.src
.format
= rbRead
->texture
->format
;
1407 blit
.src
.box
.x
= readX
;
1408 blit
.src
.box
.y
= readY
;
1409 blit
.src
.box
.z
= rbRead
->surface
->u
.tex
.first_layer
;
1410 blit
.src
.box
.width
= readW
;
1411 blit
.src
.box
.height
= readH
;
1412 blit
.src
.box
.depth
= 1;
1413 blit
.dst
.resource
= rbDraw
->texture
;
1414 blit
.dst
.level
= rbDraw
->surface
->u
.tex
.level
;
1415 blit
.dst
.format
= rbDraw
->texture
->format
;
1416 blit
.dst
.box
.x
= drawX
;
1417 blit
.dst
.box
.y
= drawY
;
1418 blit
.dst
.box
.z
= rbDraw
->surface
->u
.tex
.first_layer
;
1419 blit
.dst
.box
.width
= drawW
;
1420 blit
.dst
.box
.height
= drawH
;
1421 blit
.dst
.box
.depth
= 1;
1422 blit
.mask
= PIPE_MASK_RGBA
;
1423 blit
.filter
= PIPE_TEX_FILTER_NEAREST
;
1425 if (screen
->is_format_supported(screen
, blit
.src
.format
,
1426 blit
.src
.resource
->target
,
1427 blit
.src
.resource
->nr_samples
,
1428 PIPE_BIND_SAMPLER_VIEW
) &&
1429 screen
->is_format_supported(screen
, blit
.dst
.format
,
1430 blit
.dst
.resource
->target
,
1431 blit
.dst
.resource
->nr_samples
,
1432 PIPE_BIND_RENDER_TARGET
)) {
1433 pipe
->blit(pipe
, &blit
);
1444 st_CopyPixels(struct gl_context
*ctx
, GLint srcx
, GLint srcy
,
1445 GLsizei width
, GLsizei height
,
1446 GLint dstx
, GLint dsty
, GLenum type
)
1448 struct st_context
*st
= st_context(ctx
);
1449 struct pipe_context
*pipe
= st
->pipe
;
1450 struct pipe_screen
*screen
= pipe
->screen
;
1451 struct st_renderbuffer
*rbRead
;
1452 void *driver_vp
, *driver_fp
;
1453 struct pipe_resource
*pt
;
1454 struct pipe_sampler_view
*sv
[2] = { NULL
};
1455 int num_sampler_view
= 1;
1457 enum pipe_format srcFormat
;
1459 GLboolean invertTex
= GL_FALSE
;
1460 GLint readX
, readY
, readW
, readH
;
1461 struct gl_pixelstore_attrib pack
= ctx
->DefaultPacking
;
1462 struct st_fp_variant
*fpv
;
1464 st_validate_state(st
);
1466 if (type
== GL_DEPTH_STENCIL
) {
1467 /* XXX make this more efficient */
1468 st_CopyPixels(ctx
, srcx
, srcy
, width
, height
, dstx
, dsty
, GL_STENCIL
);
1469 st_CopyPixels(ctx
, srcx
, srcy
, width
, height
, dstx
, dsty
, GL_DEPTH
);
1473 if (type
== GL_STENCIL
) {
1474 /* can't use texturing to do stencil */
1475 copy_stencil_pixels(ctx
, srcx
, srcy
, width
, height
, dstx
, dsty
);
1479 if (blit_copy_pixels(ctx
, srcx
, srcy
, width
, height
, dstx
, dsty
, type
))
1483 * The subsequent code implements glCopyPixels by copying the source
1484 * pixels into a temporary texture that's then applied to a textured quad.
1485 * When we draw the textured quad, all the usual per-fragment operations
1491 * Get vertex/fragment shaders
1493 if (type
== GL_COLOR
) {
1494 rbRead
= st_get_color_read_renderbuffer(ctx
);
1497 fpv
= get_color_fp_variant(st
);
1498 driver_fp
= fpv
->driver_shader
;
1500 driver_vp
= make_passthrough_vertex_shader(st
, GL_FALSE
);
1502 if (st
->pixel_xfer
.pixelmap_enabled
) {
1503 pipe_sampler_view_reference(&sv
[1],
1504 st
->pixel_xfer
.pixelmap_sampler_view
);
1509 assert(type
== GL_DEPTH
);
1510 rbRead
= st_renderbuffer(ctx
->ReadBuffer
->
1511 Attachment
[BUFFER_DEPTH
].Renderbuffer
);
1512 color
= ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR0
];
1514 fpv
= get_depth_stencil_fp_variant(st
, GL_TRUE
, GL_FALSE
);
1515 driver_fp
= fpv
->driver_shader
;
1517 driver_vp
= make_passthrough_vertex_shader(st
, GL_TRUE
);
1520 /* update fragment program constants */
1521 st_upload_constants(st
, fpv
->parameters
, PIPE_SHADER_FRAGMENT
);
1523 /* Choose the format for the temporary texture. */
1524 srcFormat
= rbRead
->texture
->format
;
1525 srcBind
= PIPE_BIND_SAMPLER_VIEW
|
1526 (type
== GL_COLOR
? PIPE_BIND_RENDER_TARGET
: PIPE_BIND_DEPTH_STENCIL
);
1528 if (!screen
->is_format_supported(screen
, srcFormat
, st
->internal_target
, 0,
1530 /* srcFormat is non-renderable. Find a compatible renderable format. */
1531 if (type
== GL_DEPTH
) {
1532 srcFormat
= st_choose_format(st
, GL_DEPTH_COMPONENT
, GL_NONE
,
1533 GL_NONE
, st
->internal_target
, 0,
1537 assert(type
== GL_COLOR
);
1539 if (util_format_is_float(srcFormat
)) {
1540 srcFormat
= st_choose_format(st
, GL_RGBA32F
, GL_NONE
,
1541 GL_NONE
, st
->internal_target
, 0,
1544 else if (util_format_is_pure_sint(srcFormat
)) {
1545 srcFormat
= st_choose_format(st
, GL_RGBA32I
, GL_NONE
,
1546 GL_NONE
, st
->internal_target
, 0,
1549 else if (util_format_is_pure_uint(srcFormat
)) {
1550 srcFormat
= st_choose_format(st
, GL_RGBA32UI
, GL_NONE
,
1551 GL_NONE
, st
->internal_target
, 0,
1554 else if (util_format_is_snorm(srcFormat
)) {
1555 srcFormat
= st_choose_format(st
, GL_RGBA16_SNORM
, GL_NONE
,
1556 GL_NONE
, st
->internal_target
, 0,
1560 srcFormat
= st_choose_format(st
, GL_RGBA
, GL_NONE
,
1561 GL_NONE
, st
->internal_target
, 0,
1566 if (srcFormat
== PIPE_FORMAT_NONE
) {
1567 assert(0 && "cannot choose a format for src of CopyPixels");
1572 /* Invert src region if needed */
1573 if (st_fb_orientation(ctx
->ReadBuffer
) == Y_0_TOP
) {
1574 srcy
= ctx
->ReadBuffer
->Height
- srcy
- height
;
1575 invertTex
= !invertTex
;
1578 /* Clip the read region against the src buffer bounds.
1579 * We'll still allocate a temporary buffer/texture for the original
1580 * src region size but we'll only read the region which is on-screen.
1581 * This may mean that we draw garbage pixels into the dest region, but
1588 if (!_mesa_clip_readpixels(ctx
, &readX
, &readY
, &readW
, &readH
, &pack
)) {
1589 /* The source region is completely out of bounds. Do nothing.
1590 * The GL spec says "Results of copies from outside the window,
1591 * or from regions of the window that are not exposed, are
1592 * hardware dependent and undefined."
1597 readW
= MAX2(0, readW
);
1598 readH
= MAX2(0, readH
);
1600 /* Allocate the temporary texture. */
1601 pt
= alloc_texture(st
, width
, height
, srcFormat
, srcBind
);
1605 sv
[0] = st_create_texture_sampler_view(st
->pipe
, pt
);
1607 pipe_resource_reference(&pt
, NULL
);
1611 /* Copy the src region to the temporary texture. */
1613 struct pipe_blit_info blit
;
1615 memset(&blit
, 0, sizeof(blit
));
1616 blit
.src
.resource
= rbRead
->texture
;
1617 blit
.src
.level
= rbRead
->surface
->u
.tex
.level
;
1618 blit
.src
.format
= rbRead
->texture
->format
;
1619 blit
.src
.box
.x
= readX
;
1620 blit
.src
.box
.y
= readY
;
1621 blit
.src
.box
.z
= rbRead
->surface
->u
.tex
.first_layer
;
1622 blit
.src
.box
.width
= readW
;
1623 blit
.src
.box
.height
= readH
;
1624 blit
.src
.box
.depth
= 1;
1625 blit
.dst
.resource
= pt
;
1627 blit
.dst
.format
= pt
->format
;
1628 blit
.dst
.box
.x
= pack
.SkipPixels
;
1629 blit
.dst
.box
.y
= pack
.SkipRows
;
1631 blit
.dst
.box
.width
= readW
;
1632 blit
.dst
.box
.height
= readH
;
1633 blit
.dst
.box
.depth
= 1;
1634 blit
.mask
= util_format_get_mask(pt
->format
) & ~PIPE_MASK_S
;
1635 blit
.filter
= PIPE_TEX_FILTER_NEAREST
;
1637 pipe
->blit(pipe
, &blit
);
1640 /* OK, the texture 'pt' contains the src image/pixels. Now draw a
1641 * textured quad with that texture.
1643 draw_textured_quad(ctx
, dstx
, dsty
, ctx
->Current
.RasterPos
[2],
1644 width
, height
, ctx
->Pixel
.ZoomX
, ctx
->Pixel
.ZoomY
,
1649 color
, invertTex
, GL_FALSE
, GL_FALSE
);
1651 pipe_resource_reference(&pt
, NULL
);
1652 pipe_sampler_view_reference(&sv
[0], NULL
);
1657 void st_init_drawpixels_functions(struct dd_function_table
*functions
)
1659 functions
->DrawPixels
= st_DrawPixels
;
1660 functions
->CopyPixels
= st_CopyPixels
;
1665 st_destroy_drawpix(struct st_context
*st
)
1669 for (i
= 0; i
< ARRAY_SIZE(st
->drawpix
.shaders
); i
++) {
1670 if (st
->drawpix
.shaders
[i
])
1671 _mesa_reference_fragprog(st
->ctx
, &st
->drawpix
.shaders
[i
], NULL
);
1674 st_reference_fragprog(st
, &st
->pixel_xfer
.combined_prog
, NULL
);
1675 if (st
->drawpix
.vert_shaders
[0])
1676 cso_delete_vertex_shader(st
->cso_context
, st
->drawpix
.vert_shaders
[0]);
1677 if (st
->drawpix
.vert_shaders
[1])
1678 cso_delete_vertex_shader(st
->cso_context
, st
->drawpix
.vert_shaders
[1]);