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/format_pack.h"
37 #include "main/macros.h"
38 #include "main/mtypes.h"
39 #include "main/pack.h"
41 #include "main/readpix.h"
42 #include "main/texformat.h"
43 #include "main/teximage.h"
44 #include "main/texstore.h"
45 #include "main/glformats.h"
46 #include "program/program.h"
47 #include "program/prog_print.h"
48 #include "program/prog_instruction.h"
51 #include "st_atom_constbuf.h"
52 #include "st_cb_drawpixels.h"
53 #include "st_cb_readpixels.h"
54 #include "st_cb_fbo.h"
55 #include "st_context.h"
57 #include "st_format.h"
58 #include "st_program.h"
59 #include "st_texture.h"
61 #include "pipe/p_context.h"
62 #include "pipe/p_defines.h"
63 #include "tgsi/tgsi_ureg.h"
64 #include "util/u_draw_quad.h"
65 #include "util/u_format.h"
66 #include "util/u_inlines.h"
67 #include "util/u_math.h"
68 #include "util/u_tile.h"
69 #include "util/u_upload_mgr.h"
70 #include "cso_cache/cso_context.h"
74 * Check if the given program is:
75 * 0: MOVE result.color, fragment.color;
79 is_passthrough_program(const struct gl_fragment_program
*prog
)
81 if (prog
->Base
.NumInstructions
== 2) {
82 const struct prog_instruction
*inst
= prog
->Base
.Instructions
;
83 if (inst
[0].Opcode
== OPCODE_MOV
&&
84 inst
[1].Opcode
== OPCODE_END
&&
85 inst
[0].DstReg
.File
== PROGRAM_OUTPUT
&&
86 inst
[0].DstReg
.Index
== FRAG_RESULT_COLOR
&&
87 inst
[0].DstReg
.WriteMask
== WRITEMASK_XYZW
&&
88 inst
[0].SrcReg
[0].File
== PROGRAM_INPUT
&&
89 inst
[0].SrcReg
[0].Index
== VARYING_SLOT_COL0
&&
90 inst
[0].SrcReg
[0].Swizzle
== SWIZZLE_XYZW
) {
99 * Returns a fragment program which implements the current pixel transfer ops.
101 static struct gl_fragment_program
*
102 get_glsl_pixel_transfer_program(struct st_context
*st
,
103 struct st_fragment_program
*orig
)
105 int pixelMaps
= 0, scaleAndBias
= 0;
106 struct gl_context
*ctx
= st
->ctx
;
107 struct st_fragment_program
*fp
= (struct st_fragment_program
*)
108 ctx
->Driver
.NewProgram(ctx
, GL_FRAGMENT_PROGRAM_ARB
, 0);
113 if (ctx
->Pixel
.RedBias
!= 0.0 || ctx
->Pixel
.RedScale
!= 1.0 ||
114 ctx
->Pixel
.GreenBias
!= 0.0 || ctx
->Pixel
.GreenScale
!= 1.0 ||
115 ctx
->Pixel
.BlueBias
!= 0.0 || ctx
->Pixel
.BlueScale
!= 1.0 ||
116 ctx
->Pixel
.AlphaBias
!= 0.0 || ctx
->Pixel
.AlphaScale
!= 1.0) {
120 pixelMaps
= ctx
->Pixel
.MapColorFlag
;
123 /* create the colormap/texture now if not already done */
124 if (!st
->pixel_xfer
.pixelmap_texture
) {
125 st
->pixel_xfer
.pixelmap_texture
= st_create_color_map_texture(ctx
);
126 st
->pixel_xfer
.pixelmap_sampler_view
=
127 st_create_texture_sampler_view(st
->pipe
,
128 st
->pixel_xfer
.pixelmap_texture
);
132 get_pixel_transfer_visitor(fp
, orig
->glsl_to_tgsi
,
133 scaleAndBias
, pixelMaps
);
140 * Make fragment shader for glDraw/CopyPixels. This shader is made
141 * by combining the pixel transfer shader with the user-defined shader.
142 * \param fpIn the current/incoming fragment program
143 * \param fpOut returns the combined fragment program
146 st_make_drawpix_fragment_program(struct st_context
*st
,
147 struct gl_fragment_program
*fpIn
,
148 struct gl_fragment_program
**fpOut
)
150 struct gl_program
*newProg
;
151 struct st_fragment_program
*stfp
= (struct st_fragment_program
*) fpIn
;
153 if (is_passthrough_program(fpIn
)) {
154 newProg
= (struct gl_program
*) _mesa_clone_fragment_program(st
->ctx
,
155 &st
->pixel_xfer
.program
->Base
);
157 else if (stfp
->glsl_to_tgsi
!= NULL
) {
158 newProg
= (struct gl_program
*) get_glsl_pixel_transfer_program(st
, stfp
);
163 printf("Base program:\n");
164 _mesa_print_program(&fpIn
->Base
);
165 printf("DrawPix program:\n");
166 _mesa_print_program(&st
->pixel_xfer
.program
->Base
.Base
);
168 newProg
= _mesa_combine_programs(st
->ctx
,
169 &st
->pixel_xfer
.program
->Base
.Base
,
175 printf("Combined DrawPixels program:\n");
176 _mesa_print_program(newProg
);
177 printf("InputsRead: 0x%x\n", newProg
->InputsRead
);
178 printf("OutputsWritten: 0x%x\n", newProg
->OutputsWritten
);
179 _mesa_print_parameter_list(newProg
->Parameters
);
182 *fpOut
= (struct gl_fragment_program
*) newProg
;
187 * Create fragment program that does a TEX() instruction to get a Z and/or
188 * stencil value value, then writes to FRAG_RESULT_DEPTH/FRAG_RESULT_STENCIL.
189 * Used for glDrawPixels(GL_DEPTH_COMPONENT / GL_STENCIL_INDEX).
190 * Pass fragment color through as-is.
191 * \return pointer to the gl_fragment program
193 struct gl_fragment_program
*
194 st_make_drawpix_z_stencil_program(struct st_context
*st
,
195 GLboolean write_depth
,
196 GLboolean write_stencil
)
198 struct gl_context
*ctx
= st
->ctx
;
199 struct gl_program
*p
;
200 struct gl_fragment_program
*fp
;
202 const GLuint shaderIndex
= write_depth
* 2 + write_stencil
;
204 assert(shaderIndex
< Elements(st
->drawpix
.shaders
));
206 if (st
->drawpix
.shaders
[shaderIndex
]) {
207 /* already have the proper shader */
208 return st
->drawpix
.shaders
[shaderIndex
];
214 p
= ctx
->Driver
.NewProgram(ctx
, GL_FRAGMENT_PROGRAM_ARB
, 0);
218 p
->NumInstructions
= write_depth
? 3 : 1;
219 p
->NumInstructions
+= write_stencil
? 1 : 0;
221 p
->Instructions
= _mesa_alloc_instructions(p
->NumInstructions
);
222 if (!p
->Instructions
) {
223 ctx
->Driver
.DeleteProgram(ctx
, p
);
226 _mesa_init_instructions(p
->Instructions
, p
->NumInstructions
);
229 /* TEX result.depth, fragment.texcoord[0], texture[0], 2D; */
230 p
->Instructions
[ic
].Opcode
= OPCODE_TEX
;
231 p
->Instructions
[ic
].DstReg
.File
= PROGRAM_OUTPUT
;
232 p
->Instructions
[ic
].DstReg
.Index
= FRAG_RESULT_DEPTH
;
233 p
->Instructions
[ic
].DstReg
.WriteMask
= WRITEMASK_Z
;
234 p
->Instructions
[ic
].SrcReg
[0].File
= PROGRAM_INPUT
;
235 p
->Instructions
[ic
].SrcReg
[0].Index
= VARYING_SLOT_TEX0
;
236 p
->Instructions
[ic
].TexSrcUnit
= 0;
237 p
->Instructions
[ic
].TexSrcTarget
= TEXTURE_2D_INDEX
;
239 /* MOV result.color, fragment.color; */
240 p
->Instructions
[ic
].Opcode
= OPCODE_MOV
;
241 p
->Instructions
[ic
].DstReg
.File
= PROGRAM_OUTPUT
;
242 p
->Instructions
[ic
].DstReg
.Index
= FRAG_RESULT_COLOR
;
243 p
->Instructions
[ic
].SrcReg
[0].File
= PROGRAM_INPUT
;
244 p
->Instructions
[ic
].SrcReg
[0].Index
= VARYING_SLOT_COL0
;
249 /* TEX result.stencil, fragment.texcoord[0], texture[0], 2D; */
250 p
->Instructions
[ic
].Opcode
= OPCODE_TEX
;
251 p
->Instructions
[ic
].DstReg
.File
= PROGRAM_OUTPUT
;
252 p
->Instructions
[ic
].DstReg
.Index
= FRAG_RESULT_STENCIL
;
253 p
->Instructions
[ic
].DstReg
.WriteMask
= WRITEMASK_Y
;
254 p
->Instructions
[ic
].SrcReg
[0].File
= PROGRAM_INPUT
;
255 p
->Instructions
[ic
].SrcReg
[0].Index
= VARYING_SLOT_TEX0
;
256 p
->Instructions
[ic
].TexSrcUnit
= 1;
257 p
->Instructions
[ic
].TexSrcTarget
= TEXTURE_2D_INDEX
;
262 p
->Instructions
[ic
++].Opcode
= OPCODE_END
;
264 assert(ic
== p
->NumInstructions
);
266 p
->InputsRead
= VARYING_BIT_TEX0
| VARYING_BIT_COL0
;
267 p
->OutputsWritten
= 0;
269 p
->OutputsWritten
|= BITFIELD64_BIT(FRAG_RESULT_DEPTH
);
270 p
->OutputsWritten
|= BITFIELD64_BIT(FRAG_RESULT_COLOR
);
273 p
->OutputsWritten
|= BITFIELD64_BIT(FRAG_RESULT_STENCIL
);
275 p
->SamplersUsed
= 0x1; /* sampler 0 (bit 0) is used */
277 p
->SamplersUsed
|= 1 << 1;
279 fp
= (struct gl_fragment_program
*) p
;
281 /* save the new shader */
282 st
->drawpix
.shaders
[shaderIndex
] = fp
;
289 * Create a simple vertex shader that just passes through the
290 * vertex position and texcoord (and optionally, color).
293 make_passthrough_vertex_shader(struct st_context
*st
,
296 const unsigned texcoord_semantic
= st
->needs_texcoord_semantic
?
297 TGSI_SEMANTIC_TEXCOORD
: TGSI_SEMANTIC_GENERIC
;
299 if (!st
->drawpix
.vert_shaders
[passColor
]) {
300 struct ureg_program
*ureg
= ureg_create( TGSI_PROCESSOR_VERTEX
);
305 /* MOV result.pos, vertex.pos; */
307 ureg_DECL_output( ureg
, TGSI_SEMANTIC_POSITION
, 0 ),
308 ureg_DECL_vs_input( ureg
, 0 ));
310 /* MOV result.texcoord0, vertex.attr[1]; */
312 ureg_DECL_output( ureg
, texcoord_semantic
, 0 ),
313 ureg_DECL_vs_input( ureg
, 1 ));
316 /* MOV result.color0, vertex.attr[2]; */
318 ureg_DECL_output( ureg
, TGSI_SEMANTIC_COLOR
, 0 ),
319 ureg_DECL_vs_input( ureg
, 2 ));
324 st
->drawpix
.vert_shaders
[passColor
] =
325 ureg_create_shader_and_destroy( ureg
, st
->pipe
);
328 return st
->drawpix
.vert_shaders
[passColor
];
333 * Return a texture internalFormat for drawing/copying an image
334 * of the given format and type.
337 internal_format(struct gl_context
*ctx
, GLenum format
, GLenum type
)
340 case GL_DEPTH_COMPONENT
:
342 case GL_UNSIGNED_SHORT
:
343 return GL_DEPTH_COMPONENT16
;
345 case GL_UNSIGNED_INT
:
346 return GL_DEPTH_COMPONENT32
;
349 if (ctx
->Extensions
.ARB_depth_buffer_float
)
350 return GL_DEPTH_COMPONENT32F
;
352 return GL_DEPTH_COMPONENT
;
355 return GL_DEPTH_COMPONENT
;
358 case GL_DEPTH_STENCIL
:
360 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV
:
361 return GL_DEPTH32F_STENCIL8
;
363 case GL_UNSIGNED_INT_24_8
:
365 return GL_DEPTH24_STENCIL8
;
368 case GL_STENCIL_INDEX
:
369 return GL_STENCIL_INDEX
;
372 if (_mesa_is_enum_format_integer(format
)) {
376 case GL_UNSIGNED_BYTE
:
380 case GL_UNSIGNED_SHORT
:
384 case GL_UNSIGNED_INT
:
387 assert(0 && "Unexpected type in internal_format()");
388 return GL_RGBA_INTEGER
;
393 case GL_UNSIGNED_BYTE
:
394 case GL_UNSIGNED_INT_8_8_8_8
:
395 case GL_UNSIGNED_INT_8_8_8_8_REV
:
399 case GL_UNSIGNED_BYTE_3_3_2
:
400 case GL_UNSIGNED_BYTE_2_3_3_REV
:
403 case GL_UNSIGNED_SHORT_4_4_4_4
:
404 case GL_UNSIGNED_SHORT_4_4_4_4_REV
:
407 case GL_UNSIGNED_SHORT_5_6_5
:
408 case GL_UNSIGNED_SHORT_5_6_5_REV
:
411 case GL_UNSIGNED_SHORT_5_5_5_1
:
412 case GL_UNSIGNED_SHORT_1_5_5_5_REV
:
415 case GL_UNSIGNED_INT_10_10_10_2
:
416 case GL_UNSIGNED_INT_2_10_10_10_REV
:
419 case GL_UNSIGNED_SHORT
:
420 case GL_UNSIGNED_INT
:
425 ctx
->Extensions
.EXT_texture_snorm
? GL_RGBA8_SNORM
: GL_RGBA8
;
430 ctx
->Extensions
.EXT_texture_snorm
? GL_RGBA16_SNORM
: GL_RGBA16
;
432 case GL_HALF_FLOAT_ARB
:
434 ctx
->Extensions
.ARB_texture_float
? GL_RGBA16F
:
435 ctx
->Extensions
.EXT_texture_snorm
? GL_RGBA16_SNORM
: GL_RGBA16
;
440 ctx
->Extensions
.ARB_texture_float
? GL_RGBA32F
:
441 ctx
->Extensions
.EXT_texture_snorm
? GL_RGBA16_SNORM
: GL_RGBA16
;
443 case GL_UNSIGNED_INT_5_9_9_9_REV
:
444 assert(ctx
->Extensions
.EXT_texture_shared_exponent
);
447 case GL_UNSIGNED_INT_10F_11F_11F_REV
:
448 assert(ctx
->Extensions
.EXT_packed_float
);
449 return GL_R11F_G11F_B10F
;
457 * Create a temporary texture to hold an image of the given size.
458 * If width, height are not POT and the driver only handles POT textures,
459 * allocate the next larger size of texture that is POT.
461 static struct pipe_resource
*
462 alloc_texture(struct st_context
*st
, GLsizei width
, GLsizei height
,
463 enum pipe_format texFormat
, unsigned bind
)
465 struct pipe_resource
*pt
;
467 pt
= st_texture_create(st
, st
->internal_target
, texFormat
, 0,
468 width
, height
, 1, 1, 0, bind
);
475 * Make texture containing an image for glDrawPixels image.
476 * If 'pixels' is NULL, leave the texture image data undefined.
478 static struct pipe_resource
*
479 make_texture(struct st_context
*st
,
480 GLsizei width
, GLsizei height
, GLenum format
, GLenum type
,
481 const struct gl_pixelstore_attrib
*unpack
,
482 const GLvoid
*pixels
)
484 struct gl_context
*ctx
= st
->ctx
;
485 struct pipe_context
*pipe
= st
->pipe
;
487 struct pipe_resource
*pt
;
488 enum pipe_format pipeFormat
;
489 GLenum baseInternalFormat
;
491 /* Choose a pixel format for the temp texture which will hold the
494 pipeFormat
= st_choose_matching_format(st
, PIPE_BIND_SAMPLER_VIEW
,
495 format
, type
, unpack
->SwapBytes
);
497 if (pipeFormat
== PIPE_FORMAT_NONE
) {
498 /* Use the generic approach. */
499 GLenum intFormat
= internal_format(ctx
, format
, type
);
501 pipeFormat
= st_choose_format(st
, intFormat
, format
, type
,
502 PIPE_TEXTURE_2D
, 0, PIPE_BIND_SAMPLER_VIEW
,
504 assert(pipeFormat
!= PIPE_FORMAT_NONE
);
507 mformat
= st_pipe_format_to_mesa_format(pipeFormat
);
508 baseInternalFormat
= _mesa_get_format_base_format(mformat
);
510 pixels
= _mesa_map_pbo_source(ctx
, unpack
, pixels
);
514 /* alloc temporary texture */
515 pt
= alloc_texture(st
, width
, height
, pipeFormat
, PIPE_BIND_SAMPLER_VIEW
);
517 _mesa_unmap_pbo_source(ctx
, unpack
);
522 struct pipe_transfer
*transfer
;
525 const GLbitfield imageTransferStateSave
= ctx
->_ImageTransferState
;
527 /* we'll do pixel transfer in a fragment shader */
528 ctx
->_ImageTransferState
= 0x0;
530 /* map texture transfer */
531 dest
= pipe_transfer_map(pipe
, pt
, 0, 0,
532 PIPE_TRANSFER_WRITE
, 0, 0,
533 width
, height
, &transfer
);
536 /* Put image into texture transfer.
537 * Note that the image is actually going to be upside down in
538 * the texture. We deal with that with texcoords.
540 success
= _mesa_texstore(ctx
, 2, /* dims */
541 baseInternalFormat
, /* baseInternalFormat */
542 mformat
, /* mesa_format */
543 transfer
->stride
, /* dstRowStride, bytes */
544 &dest
, /* destSlices */
545 width
, height
, 1, /* size */
546 format
, type
, /* src format/type */
547 pixels
, /* data source */
551 pipe_transfer_unmap(pipe
, transfer
);
556 ctx
->_ImageTransferState
= imageTransferStateSave
;
559 _mesa_unmap_pbo_source(ctx
, unpack
);
566 * Draw quad with texcoords and optional color.
567 * Coords are gallium window coords with y=0=top.
568 * \param color may be null
569 * \param invertTex if true, flip texcoords vertically
572 draw_quad(struct gl_context
*ctx
, GLfloat x0
, GLfloat y0
, GLfloat z
,
573 GLfloat x1
, GLfloat y1
, const GLfloat
*color
,
574 GLboolean invertTex
, GLfloat maxXcoord
, GLfloat maxYcoord
)
576 struct st_context
*st
= st_context(ctx
);
577 struct pipe_context
*pipe
= st
->pipe
;
578 GLfloat (*verts
)[3][4]; /* four verts, three attribs, XYZW */
579 struct pipe_resource
*buf
= NULL
;
582 if (u_upload_alloc(st
->uploader
, 0, 4 * sizeof(verts
[0]), &offset
,
583 &buf
, (void **) &verts
) != PIPE_OK
) {
587 /* setup vertex data */
589 const struct gl_framebuffer
*fb
= st
->ctx
->DrawBuffer
;
590 const GLfloat fb_width
= (GLfloat
) fb
->Width
;
591 const GLfloat fb_height
= (GLfloat
) fb
->Height
;
592 const GLfloat clip_x0
= x0
/ fb_width
* 2.0f
- 1.0f
;
593 const GLfloat clip_y0
= y0
/ fb_height
* 2.0f
- 1.0f
;
594 const GLfloat clip_x1
= x1
/ fb_width
* 2.0f
- 1.0f
;
595 const GLfloat clip_y1
= y1
/ fb_height
* 2.0f
- 1.0f
;
596 const GLfloat sLeft
= 0.0f
, sRight
= maxXcoord
;
597 const GLfloat tTop
= invertTex
? maxYcoord
: 0.0f
;
598 const GLfloat tBot
= invertTex
? 0.0f
: maxYcoord
;
602 verts
[0][0][0] = clip_x0
; /* v[0].attr[0].x */
603 verts
[0][0][1] = clip_y0
; /* v[0].attr[0].y */
606 verts
[1][0][0] = clip_x1
;
607 verts
[1][0][1] = clip_y0
;
610 verts
[2][0][0] = clip_x1
;
611 verts
[2][0][1] = clip_y1
;
614 verts
[3][0][0] = clip_x0
;
615 verts
[3][0][1] = clip_y1
;
617 verts
[0][1][0] = sLeft
; /* v[0].attr[1].S */
618 verts
[0][1][1] = tTop
; /* v[0].attr[1].T */
619 verts
[1][1][0] = sRight
;
620 verts
[1][1][1] = tTop
;
621 verts
[2][1][0] = sRight
;
622 verts
[2][1][1] = tBot
;
623 verts
[3][1][0] = sLeft
;
624 verts
[3][1][1] = tBot
;
626 /* same for all verts: */
628 for (i
= 0; i
< 4; i
++) {
629 verts
[i
][0][2] = z
; /* v[i].attr[0].z */
630 verts
[i
][0][3] = 1.0f
; /* v[i].attr[0].w */
631 verts
[i
][2][0] = color
[0]; /* v[i].attr[2].r */
632 verts
[i
][2][1] = color
[1]; /* v[i].attr[2].g */
633 verts
[i
][2][2] = color
[2]; /* v[i].attr[2].b */
634 verts
[i
][2][3] = color
[3]; /* v[i].attr[2].a */
635 verts
[i
][1][2] = 0.0f
; /* v[i].attr[1].R */
636 verts
[i
][1][3] = 1.0f
; /* v[i].attr[1].Q */
640 for (i
= 0; i
< 4; i
++) {
641 verts
[i
][0][2] = z
; /*Z*/
642 verts
[i
][0][3] = 1.0f
; /*W*/
643 verts
[i
][1][2] = 0.0f
; /*R*/
644 verts
[i
][1][3] = 1.0f
; /*Q*/
649 u_upload_unmap(st
->uploader
);
650 util_draw_vertex_buffer(pipe
, st
->cso_context
, buf
,
651 cso_get_aux_vertex_buffer_slot(st
->cso_context
),
655 3); /* attribs/vert */
656 pipe_resource_reference(&buf
, NULL
);
662 draw_textured_quad(struct gl_context
*ctx
, GLint x
, GLint y
, GLfloat z
,
663 GLsizei width
, GLsizei height
,
664 GLfloat zoomX
, GLfloat zoomY
,
665 struct pipe_sampler_view
**sv
,
666 int num_sampler_view
,
669 const GLfloat
*color
,
671 GLboolean write_depth
, GLboolean write_stencil
)
673 struct st_context
*st
= st_context(ctx
);
674 struct pipe_context
*pipe
= st
->pipe
;
675 struct cso_context
*cso
= st
->cso_context
;
676 GLfloat x0
, y0
, x1
, y1
;
678 boolean normalized
= sv
[0]->texture
->target
!= PIPE_TEXTURE_RECT
;
681 /* XXX if DrawPixels image is larger than max texture size, break
684 maxSize
= 1 << (pipe
->screen
->get_param(pipe
->screen
,
685 PIPE_CAP_MAX_TEXTURE_2D_LEVELS
) - 1);
686 assert(width
<= maxSize
);
687 assert(height
<= maxSize
);
689 cso_save_rasterizer(cso
);
690 cso_save_viewport(cso
);
691 cso_save_samplers(cso
, PIPE_SHADER_FRAGMENT
);
692 cso_save_sampler_views(cso
, PIPE_SHADER_FRAGMENT
);
693 cso_save_fragment_shader(cso
);
694 cso_save_stream_outputs(cso
);
695 cso_save_vertex_shader(cso
);
696 cso_save_geometry_shader(cso
);
697 cso_save_vertex_elements(cso
);
698 cso_save_aux_vertex_buffer_slot(cso
);
700 cso_save_depth_stencil_alpha(cso
);
704 /* rasterizer state: just scissor */
706 struct pipe_rasterizer_state rasterizer
;
707 memset(&rasterizer
, 0, sizeof(rasterizer
));
708 rasterizer
.clamp_fragment_color
= !st
->clamp_frag_color_in_shader
&&
709 ctx
->Color
._ClampFragmentColor
;
710 rasterizer
.half_pixel_center
= 1;
711 rasterizer
.bottom_edge_rule
= 1;
712 rasterizer
.depth_clip
= !ctx
->Transform
.DepthClamp
;
713 rasterizer
.scissor
= ctx
->Scissor
.EnableFlags
;
714 cso_set_rasterizer(cso
, &rasterizer
);
718 /* Stencil writing bypasses the normal fragment pipeline to
719 * disable color writing and set stencil test to always pass.
721 struct pipe_depth_stencil_alpha_state dsa
;
722 struct pipe_blend_state blend
;
725 memset(&dsa
, 0, sizeof(dsa
));
726 dsa
.stencil
[0].enabled
= 1;
727 dsa
.stencil
[0].func
= PIPE_FUNC_ALWAYS
;
728 dsa
.stencil
[0].writemask
= ctx
->Stencil
.WriteMask
[0] & 0xff;
729 dsa
.stencil
[0].zpass_op
= PIPE_STENCIL_OP_REPLACE
;
731 /* writing depth+stencil: depth test always passes */
732 dsa
.depth
.enabled
= 1;
733 dsa
.depth
.writemask
= ctx
->Depth
.Mask
;
734 dsa
.depth
.func
= PIPE_FUNC_ALWAYS
;
736 cso_set_depth_stencil_alpha(cso
, &dsa
);
738 /* blend (colormask) */
739 memset(&blend
, 0, sizeof(blend
));
740 cso_set_blend(cso
, &blend
);
743 /* fragment shader state: TEX lookup program */
744 cso_set_fragment_shader_handle(cso
, driver_fp
);
746 /* vertex shader state: position + texcoord pass-through */
747 cso_set_vertex_shader_handle(cso
, driver_vp
);
749 /* geometry shader state: disabled */
750 cso_set_geometry_shader_handle(cso
, NULL
);
752 /* texture sampling state: */
754 struct pipe_sampler_state sampler
;
755 memset(&sampler
, 0, sizeof(sampler
));
756 sampler
.wrap_s
= PIPE_TEX_WRAP_CLAMP
;
757 sampler
.wrap_t
= PIPE_TEX_WRAP_CLAMP
;
758 sampler
.wrap_r
= PIPE_TEX_WRAP_CLAMP
;
759 sampler
.min_img_filter
= PIPE_TEX_FILTER_NEAREST
;
760 sampler
.min_mip_filter
= PIPE_TEX_MIPFILTER_NONE
;
761 sampler
.mag_img_filter
= PIPE_TEX_FILTER_NEAREST
;
762 sampler
.normalized_coords
= normalized
;
764 cso_single_sampler(cso
, PIPE_SHADER_FRAGMENT
, 0, &sampler
);
765 if (num_sampler_view
> 1) {
766 cso_single_sampler(cso
, PIPE_SHADER_FRAGMENT
, 1, &sampler
);
768 cso_single_sampler_done(cso
, PIPE_SHADER_FRAGMENT
);
771 /* viewport state: viewport matching window dims */
773 const float w
= (float) ctx
->DrawBuffer
->Width
;
774 const float h
= (float) ctx
->DrawBuffer
->Height
;
775 struct pipe_viewport_state vp
;
776 vp
.scale
[0] = 0.5f
* w
;
777 vp
.scale
[1] = -0.5f
* h
;
780 vp
.translate
[0] = 0.5f
* w
;
781 vp
.translate
[1] = 0.5f
* h
;
782 vp
.translate
[2] = 0.5f
;
783 vp
.translate
[3] = 0.0f
;
784 cso_set_viewport(cso
, &vp
);
787 cso_set_vertex_elements(cso
, 3, st
->velems_util_draw
);
788 cso_set_stream_outputs(st
->cso_context
, 0, NULL
, NULL
);
791 cso_set_sampler_views(cso
, PIPE_SHADER_FRAGMENT
, num_sampler_view
, sv
);
793 /* Compute Gallium window coords (y=0=top) with pixel zoom.
794 * Recall that these coords are transformed by the current
795 * vertex shader and viewport transformation.
797 if (st_fb_orientation(ctx
->DrawBuffer
) == Y_0_BOTTOM
) {
798 y
= ctx
->DrawBuffer
->Height
- (int) (y
+ height
* ctx
->Pixel
.ZoomY
);
799 invertTex
= !invertTex
;
803 x1
= x
+ width
* ctx
->Pixel
.ZoomX
;
805 y1
= y
+ height
* ctx
->Pixel
.ZoomY
;
807 /* convert Z from [0,1] to [-1,-1] to match viewport Z scale/bias */
810 draw_quad(ctx
, x0
, y0
, z
, x1
, y1
, color
, invertTex
,
811 normalized
? ((GLfloat
) width
/ sv
[0]->texture
->width0
) : (GLfloat
)width
,
812 normalized
? ((GLfloat
) height
/ sv
[0]->texture
->height0
) : (GLfloat
)height
);
815 cso_restore_rasterizer(cso
);
816 cso_restore_viewport(cso
);
817 cso_restore_samplers(cso
, PIPE_SHADER_FRAGMENT
);
818 cso_restore_sampler_views(cso
, PIPE_SHADER_FRAGMENT
);
819 cso_restore_fragment_shader(cso
);
820 cso_restore_vertex_shader(cso
);
821 cso_restore_geometry_shader(cso
);
822 cso_restore_vertex_elements(cso
);
823 cso_restore_aux_vertex_buffer_slot(cso
);
824 cso_restore_stream_outputs(cso
);
826 cso_restore_depth_stencil_alpha(cso
);
827 cso_restore_blend(cso
);
833 * Software fallback to do glDrawPixels(GL_STENCIL_INDEX) when we
834 * can't use a fragment shader to write stencil values.
837 draw_stencil_pixels(struct gl_context
*ctx
, GLint x
, GLint y
,
838 GLsizei width
, GLsizei height
, GLenum format
, GLenum type
,
839 const struct gl_pixelstore_attrib
*unpack
,
840 const GLvoid
*pixels
)
842 struct st_context
*st
= st_context(ctx
);
843 struct pipe_context
*pipe
= st
->pipe
;
844 struct st_renderbuffer
*strb
;
845 enum pipe_transfer_usage usage
;
846 struct pipe_transfer
*pt
;
847 const GLboolean zoom
= ctx
->Pixel
.ZoomX
!= 1.0 || ctx
->Pixel
.ZoomY
!= 1.0;
849 struct gl_pixelstore_attrib clippedUnpack
= *unpack
;
854 if (!_mesa_clip_drawpixels(ctx
, &x
, &y
, &width
, &height
,
856 /* totally clipped */
861 strb
= st_renderbuffer(ctx
->DrawBuffer
->
862 Attachment
[BUFFER_STENCIL
].Renderbuffer
);
864 if (st_fb_orientation(ctx
->DrawBuffer
) == Y_0_TOP
) {
865 y
= ctx
->DrawBuffer
->Height
- y
- height
;
868 if (format
== GL_STENCIL_INDEX
&&
869 _mesa_is_format_packed_depth_stencil(strb
->Base
.Format
)) {
870 /* writing stencil to a combined depth+stencil buffer */
871 usage
= PIPE_TRANSFER_READ_WRITE
;
874 usage
= PIPE_TRANSFER_WRITE
;
877 stmap
= pipe_transfer_map(pipe
, strb
->texture
,
878 strb
->surface
->u
.tex
.level
,
879 strb
->surface
->u
.tex
.first_layer
,
883 pixels
= _mesa_map_pbo_source(ctx
, &clippedUnpack
, pixels
);
886 sValues
= malloc(width
* sizeof(GLubyte
));
887 zValues
= malloc(width
* sizeof(GLuint
));
889 if (sValues
&& zValues
) {
891 for (row
= 0; row
< height
; row
++) {
892 GLfloat
*zValuesFloat
= (GLfloat
*)zValues
;
893 GLenum destType
= GL_UNSIGNED_BYTE
;
894 const GLvoid
*source
= _mesa_image_address2d(&clippedUnpack
, pixels
,
898 _mesa_unpack_stencil_span(ctx
, width
, destType
, sValues
,
899 type
, source
, &clippedUnpack
,
900 ctx
->_ImageTransferState
);
902 if (format
== GL_DEPTH_STENCIL
) {
904 pt
->resource
->format
== PIPE_FORMAT_Z32_FLOAT_S8X24_UINT
?
905 GL_FLOAT
: GL_UNSIGNED_INT
;
907 _mesa_unpack_depth_span(ctx
, width
, ztype
, zValues
,
908 (1 << 24) - 1, type
, source
,
913 _mesa_problem(ctx
, "Gallium glDrawPixels(GL_STENCIL) with "
914 "zoom not complete");
920 if (st_fb_orientation(ctx
->DrawBuffer
) == Y_0_TOP
) {
921 spanY
= height
- row
- 1;
927 /* now pack the stencil (and Z) values in the dest format */
928 switch (pt
->resource
->format
) {
929 case PIPE_FORMAT_S8_UINT
:
931 ubyte
*dest
= stmap
+ spanY
* pt
->stride
;
932 assert(usage
== PIPE_TRANSFER_WRITE
);
933 memcpy(dest
, sValues
, width
);
936 case PIPE_FORMAT_Z24_UNORM_S8_UINT
:
937 if (format
== GL_DEPTH_STENCIL
) {
938 uint
*dest
= (uint
*) (stmap
+ spanY
* pt
->stride
);
940 assert(usage
== PIPE_TRANSFER_WRITE
);
941 for (k
= 0; k
< width
; k
++) {
942 dest
[k
] = zValues
[k
] | (sValues
[k
] << 24);
946 uint
*dest
= (uint
*) (stmap
+ spanY
* pt
->stride
);
948 assert(usage
== PIPE_TRANSFER_READ_WRITE
);
949 for (k
= 0; k
< width
; k
++) {
950 dest
[k
] = (dest
[k
] & 0xffffff) | (sValues
[k
] << 24);
954 case PIPE_FORMAT_S8_UINT_Z24_UNORM
:
955 if (format
== GL_DEPTH_STENCIL
) {
956 uint
*dest
= (uint
*) (stmap
+ spanY
* pt
->stride
);
958 assert(usage
== PIPE_TRANSFER_WRITE
);
959 for (k
= 0; k
< width
; k
++) {
960 dest
[k
] = (zValues
[k
] << 8) | (sValues
[k
] & 0xff);
964 uint
*dest
= (uint
*) (stmap
+ spanY
* pt
->stride
);
966 assert(usage
== PIPE_TRANSFER_READ_WRITE
);
967 for (k
= 0; k
< width
; k
++) {
968 dest
[k
] = (dest
[k
] & 0xffffff00) | (sValues
[k
] & 0xff);
972 case PIPE_FORMAT_Z32_FLOAT_S8X24_UINT
:
973 if (format
== GL_DEPTH_STENCIL
) {
974 uint
*dest
= (uint
*) (stmap
+ spanY
* pt
->stride
);
975 GLfloat
*destf
= (GLfloat
*)dest
;
977 assert(usage
== PIPE_TRANSFER_WRITE
);
978 for (k
= 0; k
< width
; k
++) {
979 destf
[k
*2] = zValuesFloat
[k
];
980 dest
[k
*2+1] = sValues
[k
] & 0xff;
984 uint
*dest
= (uint
*) (stmap
+ spanY
* pt
->stride
);
986 assert(usage
== PIPE_TRANSFER_READ_WRITE
);
987 for (k
= 0; k
< width
; k
++) {
988 dest
[k
*2+1] = sValues
[k
] & 0xff;
999 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glDrawPixels()");
1005 _mesa_unmap_pbo_source(ctx
, &clippedUnpack
);
1007 /* unmap the stencil buffer */
1008 pipe_transfer_unmap(pipe
, pt
);
1013 * Get fragment program variant for a glDrawPixels or glCopyPixels
1014 * command for RGBA data.
1016 static struct st_fp_variant
*
1017 get_color_fp_variant(struct st_context
*st
)
1019 struct gl_context
*ctx
= st
->ctx
;
1020 struct st_fp_variant_key key
;
1021 struct st_fp_variant
*fpv
;
1023 memset(&key
, 0, sizeof(key
));
1027 key
.scaleAndBias
= (ctx
->Pixel
.RedBias
!= 0.0 ||
1028 ctx
->Pixel
.RedScale
!= 1.0 ||
1029 ctx
->Pixel
.GreenBias
!= 0.0 ||
1030 ctx
->Pixel
.GreenScale
!= 1.0 ||
1031 ctx
->Pixel
.BlueBias
!= 0.0 ||
1032 ctx
->Pixel
.BlueScale
!= 1.0 ||
1033 ctx
->Pixel
.AlphaBias
!= 0.0 ||
1034 ctx
->Pixel
.AlphaScale
!= 1.0);
1035 key
.pixelMaps
= ctx
->Pixel
.MapColorFlag
;
1036 key
.clamp_color
= st
->clamp_frag_color_in_shader
&&
1037 st
->ctx
->Color
._ClampFragmentColor
;
1039 fpv
= st_get_fp_variant(st
, st
->fp
, &key
);
1046 * Get fragment program variant for a glDrawPixels or glCopyPixels
1047 * command for depth/stencil data.
1049 static struct st_fp_variant
*
1050 get_depth_stencil_fp_variant(struct st_context
*st
, GLboolean write_depth
,
1051 GLboolean write_stencil
)
1053 struct st_fp_variant_key key
;
1054 struct st_fp_variant
*fpv
;
1056 memset(&key
, 0, sizeof(key
));
1060 key
.drawpixels_z
= write_depth
;
1061 key
.drawpixels_stencil
= write_stencil
;
1063 fpv
= st_get_fp_variant(st
, st
->fp
, &key
);
1070 * Clamp glDrawPixels width and height to the maximum texture size.
1073 clamp_size(struct pipe_context
*pipe
, GLsizei
*width
, GLsizei
*height
,
1074 struct gl_pixelstore_attrib
*unpack
)
1077 1 << (pipe
->screen
->get_param(pipe
->screen
,
1078 PIPE_CAP_MAX_TEXTURE_2D_LEVELS
) - 1);
1080 if (*width
> maxSize
) {
1081 if (unpack
->RowLength
== 0)
1082 unpack
->RowLength
= *width
;
1085 if (*height
> maxSize
) {
1092 * Called via ctx->Driver.DrawPixels()
1095 st_DrawPixels(struct gl_context
*ctx
, GLint x
, GLint y
,
1096 GLsizei width
, GLsizei height
,
1097 GLenum format
, GLenum type
,
1098 const struct gl_pixelstore_attrib
*unpack
, const GLvoid
*pixels
)
1100 void *driver_vp
, *driver_fp
;
1101 struct st_context
*st
= st_context(ctx
);
1102 const GLfloat
*color
;
1103 struct pipe_context
*pipe
= st
->pipe
;
1104 GLboolean write_stencil
= GL_FALSE
, write_depth
= GL_FALSE
;
1105 struct pipe_sampler_view
*sv
[2];
1106 int num_sampler_view
= 1;
1107 struct st_fp_variant
*fpv
;
1108 struct gl_pixelstore_attrib clippedUnpack
;
1110 /* Mesa state should be up to date by now */
1111 assert(ctx
->NewState
== 0x0);
1113 st_validate_state(st
);
1115 /* Limit the size of the glDrawPixels to the max texture size.
1116 * Strictly speaking, that's not correct but since we don't handle
1117 * larger images yet, this is better than crashing.
1119 clippedUnpack
= *unpack
;
1120 unpack
= &clippedUnpack
;
1121 clamp_size(st
->pipe
, &width
, &height
, &clippedUnpack
);
1123 if (format
== GL_DEPTH_STENCIL
)
1124 write_stencil
= write_depth
= GL_TRUE
;
1125 else if (format
== GL_STENCIL_INDEX
)
1126 write_stencil
= GL_TRUE
;
1127 else if (format
== GL_DEPTH_COMPONENT
)
1128 write_depth
= GL_TRUE
;
1130 if (write_stencil
&&
1131 !pipe
->screen
->get_param(pipe
->screen
, PIPE_CAP_SHADER_STENCIL_EXPORT
)) {
1132 /* software fallback */
1133 draw_stencil_pixels(ctx
, x
, y
, width
, height
, format
, type
,
1139 * Get vertex/fragment shaders
1141 if (write_depth
|| write_stencil
) {
1142 fpv
= get_depth_stencil_fp_variant(st
, write_depth
, write_stencil
);
1144 driver_fp
= fpv
->driver_shader
;
1146 driver_vp
= make_passthrough_vertex_shader(st
, GL_TRUE
);
1148 color
= ctx
->Current
.RasterColor
;
1151 fpv
= get_color_fp_variant(st
);
1153 driver_fp
= fpv
->driver_shader
;
1155 driver_vp
= make_passthrough_vertex_shader(st
, GL_FALSE
);
1158 if (st
->pixel_xfer
.pixelmap_enabled
) {
1159 sv
[1] = st
->pixel_xfer
.pixelmap_sampler_view
;
1164 /* update fragment program constants */
1165 st_upload_constants(st
, fpv
->parameters
, PIPE_SHADER_FRAGMENT
);
1167 /* draw with textured quad */
1169 struct pipe_resource
*pt
1170 = make_texture(st
, width
, height
, format
, type
, unpack
, pixels
);
1172 sv
[0] = st_create_texture_sampler_view(st
->pipe
, pt
);
1175 /* Create a second sampler view to read stencil.
1176 * The stencil is written using the shader stencil export
1178 if (write_stencil
) {
1179 enum pipe_format stencil_format
=
1180 util_format_stencil_only(pt
->format
);
1182 sv
[1] = st_create_texture_sampler_view_format(st
->pipe
, pt
,
1187 draw_textured_quad(ctx
, x
, y
, ctx
->Current
.RasterPos
[2],
1189 ctx
->Pixel
.ZoomX
, ctx
->Pixel
.ZoomY
,
1194 color
, GL_FALSE
, write_depth
, write_stencil
);
1195 pipe_sampler_view_reference(&sv
[0], NULL
);
1196 if (num_sampler_view
> 1)
1197 pipe_sampler_view_reference(&sv
[1], NULL
);
1199 pipe_resource_reference(&pt
, NULL
);
1207 * Software fallback for glCopyPixels(GL_STENCIL).
1210 copy_stencil_pixels(struct gl_context
*ctx
, GLint srcx
, GLint srcy
,
1211 GLsizei width
, GLsizei height
,
1212 GLint dstx
, GLint dsty
)
1214 struct st_renderbuffer
*rbDraw
;
1215 struct pipe_context
*pipe
= st_context(ctx
)->pipe
;
1216 enum pipe_transfer_usage usage
;
1217 struct pipe_transfer
*ptDraw
;
1222 buffer
= malloc(width
* height
* sizeof(ubyte
));
1224 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glCopyPixels(stencil)");
1228 /* Get the dest renderbuffer */
1229 rbDraw
= st_renderbuffer(ctx
->DrawBuffer
->
1230 Attachment
[BUFFER_STENCIL
].Renderbuffer
);
1232 /* this will do stencil pixel transfer ops */
1233 _mesa_readpixels(ctx
, srcx
, srcy
, width
, height
,
1234 GL_STENCIL_INDEX
, GL_UNSIGNED_BYTE
,
1235 &ctx
->DefaultPacking
, buffer
);
1238 /* debug code: dump stencil values */
1240 for (row
= 0; row
< height
; row
++) {
1241 printf("%3d: ", row
);
1242 for (col
= 0; col
< width
; col
++) {
1243 printf("%02x ", buffer
[col
+ row
* width
]);
1249 if (_mesa_is_format_packed_depth_stencil(rbDraw
->Base
.Format
))
1250 usage
= PIPE_TRANSFER_READ_WRITE
;
1252 usage
= PIPE_TRANSFER_WRITE
;
1254 if (st_fb_orientation(ctx
->DrawBuffer
) == Y_0_TOP
) {
1255 dsty
= rbDraw
->Base
.Height
- dsty
- height
;
1258 assert(util_format_get_blockwidth(rbDraw
->texture
->format
) == 1);
1259 assert(util_format_get_blockheight(rbDraw
->texture
->format
) == 1);
1261 /* map the stencil buffer */
1262 drawMap
= pipe_transfer_map(pipe
,
1264 rbDraw
->surface
->u
.tex
.level
,
1265 rbDraw
->surface
->u
.tex
.first_layer
,
1267 width
, height
, &ptDraw
);
1270 /* XXX PixelZoom not handled yet */
1271 for (i
= 0; i
< height
; i
++) {
1278 if (st_fb_orientation(ctx
->DrawBuffer
) == Y_0_TOP
) {
1282 dst
= drawMap
+ y
* ptDraw
->stride
;
1283 src
= buffer
+ i
* width
;
1285 _mesa_pack_ubyte_stencil_row(rbDraw
->Base
.Format
, width
, src
, dst
);
1290 /* unmap the stencil buffer */
1291 pipe_transfer_unmap(pipe
, ptDraw
);
1296 * Return renderbuffer to use for reading color pixels for glCopyPixels
1298 static struct st_renderbuffer
*
1299 st_get_color_read_renderbuffer(struct gl_context
*ctx
)
1301 struct gl_framebuffer
*fb
= ctx
->ReadBuffer
;
1302 struct st_renderbuffer
*strb
=
1303 st_renderbuffer(fb
->_ColorReadBuffer
);
1310 * \return TRUE if two regions overlap, FALSE otherwise
1313 regions_overlap(int srcX0
, int srcY0
,
1314 int srcX1
, int srcY1
,
1315 int dstX0
, int dstY0
,
1316 int dstX1
, int dstY1
)
1318 if (MAX2(srcX0
, srcX1
) < MIN2(dstX0
, dstX1
))
1319 return FALSE
; /* src completely left of dst */
1321 if (MAX2(dstX0
, dstX1
) < MIN2(srcX0
, srcX1
))
1322 return FALSE
; /* dst completely left of src */
1324 if (MAX2(srcY0
, srcY1
) < MIN2(dstY0
, dstY1
))
1325 return FALSE
; /* src completely above dst */
1327 if (MAX2(dstY0
, dstY1
) < MIN2(srcY0
, srcY1
))
1328 return FALSE
; /* dst completely above src */
1330 return TRUE
; /* some overlap */
1335 * Try to do a glCopyPixels for simple cases with a blit by calling
1338 * We can do this when we're copying color pixels (depth/stencil
1339 * eventually) with no pixel zoom, no pixel transfer ops, no
1340 * per-fragment ops, and the src/dest regions don't overlap.
1343 blit_copy_pixels(struct gl_context
*ctx
, GLint srcx
, GLint srcy
,
1344 GLsizei width
, GLsizei height
,
1345 GLint dstx
, GLint dsty
, GLenum type
)
1347 struct st_context
*st
= st_context(ctx
);
1348 struct pipe_context
*pipe
= st
->pipe
;
1349 struct pipe_screen
*screen
= pipe
->screen
;
1350 struct gl_pixelstore_attrib pack
, unpack
;
1351 GLint readX
, readY
, readW
, readH
, drawX
, drawY
, drawW
, drawH
;
1353 if (type
== GL_COLOR
&&
1354 ctx
->Pixel
.ZoomX
== 1.0 &&
1355 ctx
->Pixel
.ZoomY
== 1.0 &&
1356 ctx
->_ImageTransferState
== 0x0 &&
1357 !ctx
->Color
.BlendEnabled
&&
1358 !ctx
->Color
.AlphaEnabled
&&
1360 !ctx
->Fog
.Enabled
&&
1361 !ctx
->Stencil
.Enabled
&&
1362 !ctx
->FragmentProgram
.Enabled
&&
1363 !ctx
->VertexProgram
.Enabled
&&
1364 !ctx
->_Shader
->CurrentProgram
[MESA_SHADER_FRAGMENT
] &&
1365 ctx
->DrawBuffer
->_NumColorDrawBuffers
== 1 &&
1366 !ctx
->Query
.CondRenderQuery
&&
1367 !ctx
->Query
.CurrentOcclusionObject
) {
1368 struct st_renderbuffer
*rbRead
, *rbDraw
;
1371 * Clip the read region against the src buffer bounds.
1372 * We'll still allocate a temporary buffer/texture for the original
1373 * src region size but we'll only read the region which is on-screen.
1374 * This may mean that we draw garbage pixels into the dest region, but
1381 pack
= ctx
->DefaultPacking
;
1382 if (!_mesa_clip_readpixels(ctx
, &readX
, &readY
, &readW
, &readH
, &pack
))
1383 return GL_TRUE
; /* all done */
1385 /* clip against dest buffer bounds and scissor box */
1386 drawX
= dstx
+ pack
.SkipPixels
;
1387 drawY
= dsty
+ pack
.SkipRows
;
1389 if (!_mesa_clip_drawpixels(ctx
, &drawX
, &drawY
, &readW
, &readH
, &unpack
))
1390 return GL_TRUE
; /* all done */
1392 readX
= readX
- pack
.SkipPixels
+ unpack
.SkipPixels
;
1393 readY
= readY
- pack
.SkipRows
+ unpack
.SkipRows
;
1398 rbRead
= st_get_color_read_renderbuffer(ctx
);
1399 rbDraw
= st_renderbuffer(ctx
->DrawBuffer
->_ColorDrawBuffers
[0]);
1401 /* Flip src/dst position depending on the orientation of buffers. */
1402 if (st_fb_orientation(ctx
->ReadBuffer
) == Y_0_TOP
) {
1403 readY
= rbRead
->Base
.Height
- readY
;
1407 if (st_fb_orientation(ctx
->DrawBuffer
) == Y_0_TOP
) {
1408 /* We can't flip the destination for pipe->blit, so we only adjust
1409 * its position and flip the source.
1411 drawY
= rbDraw
->Base
.Height
- drawY
- drawH
;
1416 if (rbRead
!= rbDraw
||
1417 !regions_overlap(readX
, readY
, readX
+ readW
, readY
+ readH
,
1418 drawX
, drawY
, drawX
+ drawW
, drawY
+ drawH
)) {
1419 struct pipe_blit_info blit
;
1421 memset(&blit
, 0, sizeof(blit
));
1422 blit
.src
.resource
= rbRead
->texture
;
1423 blit
.src
.level
= rbRead
->surface
->u
.tex
.level
;
1424 blit
.src
.format
= rbRead
->texture
->format
;
1425 blit
.src
.box
.x
= readX
;
1426 blit
.src
.box
.y
= readY
;
1427 blit
.src
.box
.z
= rbRead
->surface
->u
.tex
.first_layer
;
1428 blit
.src
.box
.width
= readW
;
1429 blit
.src
.box
.height
= readH
;
1430 blit
.src
.box
.depth
= 1;
1431 blit
.dst
.resource
= rbDraw
->texture
;
1432 blit
.dst
.level
= rbDraw
->surface
->u
.tex
.level
;
1433 blit
.dst
.format
= rbDraw
->texture
->format
;
1434 blit
.dst
.box
.x
= drawX
;
1435 blit
.dst
.box
.y
= drawY
;
1436 blit
.dst
.box
.z
= rbDraw
->surface
->u
.tex
.first_layer
;
1437 blit
.dst
.box
.width
= drawW
;
1438 blit
.dst
.box
.height
= drawH
;
1439 blit
.dst
.box
.depth
= 1;
1440 blit
.mask
= PIPE_MASK_RGBA
;
1441 blit
.filter
= PIPE_TEX_FILTER_NEAREST
;
1443 if (screen
->is_format_supported(screen
, blit
.src
.format
,
1444 blit
.src
.resource
->target
,
1445 blit
.src
.resource
->nr_samples
,
1446 PIPE_BIND_SAMPLER_VIEW
) &&
1447 screen
->is_format_supported(screen
, blit
.dst
.format
,
1448 blit
.dst
.resource
->target
,
1449 blit
.dst
.resource
->nr_samples
,
1450 PIPE_BIND_RENDER_TARGET
)) {
1451 pipe
->blit(pipe
, &blit
);
1462 st_CopyPixels(struct gl_context
*ctx
, GLint srcx
, GLint srcy
,
1463 GLsizei width
, GLsizei height
,
1464 GLint dstx
, GLint dsty
, GLenum type
)
1466 struct st_context
*st
= st_context(ctx
);
1467 struct pipe_context
*pipe
= st
->pipe
;
1468 struct pipe_screen
*screen
= pipe
->screen
;
1469 struct st_renderbuffer
*rbRead
;
1470 void *driver_vp
, *driver_fp
;
1471 struct pipe_resource
*pt
;
1472 struct pipe_sampler_view
*sv
[2];
1473 int num_sampler_view
= 1;
1475 enum pipe_format srcFormat
;
1477 GLboolean invertTex
= GL_FALSE
;
1478 GLint readX
, readY
, readW
, readH
;
1479 struct gl_pixelstore_attrib pack
= ctx
->DefaultPacking
;
1480 struct st_fp_variant
*fpv
;
1482 st_validate_state(st
);
1484 if (type
== GL_DEPTH_STENCIL
) {
1485 /* XXX make this more efficient */
1486 st_CopyPixels(ctx
, srcx
, srcy
, width
, height
, dstx
, dsty
, GL_STENCIL
);
1487 st_CopyPixels(ctx
, srcx
, srcy
, width
, height
, dstx
, dsty
, GL_DEPTH
);
1491 if (type
== GL_STENCIL
) {
1492 /* can't use texturing to do stencil */
1493 copy_stencil_pixels(ctx
, srcx
, srcy
, width
, height
, dstx
, dsty
);
1497 if (blit_copy_pixels(ctx
, srcx
, srcy
, width
, height
, dstx
, dsty
, type
))
1501 * The subsequent code implements glCopyPixels by copying the source
1502 * pixels into a temporary texture that's then applied to a textured quad.
1503 * When we draw the textured quad, all the usual per-fragment operations
1509 * Get vertex/fragment shaders
1511 if (type
== GL_COLOR
) {
1512 rbRead
= st_get_color_read_renderbuffer(ctx
);
1515 fpv
= get_color_fp_variant(st
);
1516 driver_fp
= fpv
->driver_shader
;
1518 driver_vp
= make_passthrough_vertex_shader(st
, GL_FALSE
);
1520 if (st
->pixel_xfer
.pixelmap_enabled
) {
1521 sv
[1] = st
->pixel_xfer
.pixelmap_sampler_view
;
1526 assert(type
== GL_DEPTH
);
1527 rbRead
= st_renderbuffer(ctx
->ReadBuffer
->
1528 Attachment
[BUFFER_DEPTH
].Renderbuffer
);
1529 color
= ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR0
];
1531 fpv
= get_depth_stencil_fp_variant(st
, GL_TRUE
, GL_FALSE
);
1532 driver_fp
= fpv
->driver_shader
;
1534 driver_vp
= make_passthrough_vertex_shader(st
, GL_TRUE
);
1537 /* update fragment program constants */
1538 st_upload_constants(st
, fpv
->parameters
, PIPE_SHADER_FRAGMENT
);
1540 /* Choose the format for the temporary texture. */
1541 srcFormat
= rbRead
->texture
->format
;
1542 srcBind
= PIPE_BIND_SAMPLER_VIEW
|
1543 (type
== GL_COLOR
? PIPE_BIND_RENDER_TARGET
: PIPE_BIND_DEPTH_STENCIL
);
1545 if (!screen
->is_format_supported(screen
, srcFormat
, st
->internal_target
, 0,
1547 /* srcFormat is non-renderable. Find a compatible renderable format. */
1548 if (type
== GL_DEPTH
) {
1549 srcFormat
= st_choose_format(st
, GL_DEPTH_COMPONENT
, GL_NONE
,
1550 GL_NONE
, st
->internal_target
, 0,
1554 assert(type
== GL_COLOR
);
1556 if (util_format_is_float(srcFormat
)) {
1557 srcFormat
= st_choose_format(st
, GL_RGBA32F
, GL_NONE
,
1558 GL_NONE
, st
->internal_target
, 0,
1561 else if (util_format_is_pure_sint(srcFormat
)) {
1562 srcFormat
= st_choose_format(st
, GL_RGBA32I
, GL_NONE
,
1563 GL_NONE
, st
->internal_target
, 0,
1566 else if (util_format_is_pure_uint(srcFormat
)) {
1567 srcFormat
= st_choose_format(st
, GL_RGBA32UI
, GL_NONE
,
1568 GL_NONE
, st
->internal_target
, 0,
1571 else if (util_format_is_snorm(srcFormat
)) {
1572 srcFormat
= st_choose_format(st
, GL_RGBA16_SNORM
, GL_NONE
,
1573 GL_NONE
, st
->internal_target
, 0,
1577 srcFormat
= st_choose_format(st
, GL_RGBA
, GL_NONE
,
1578 GL_NONE
, st
->internal_target
, 0,
1583 if (srcFormat
== PIPE_FORMAT_NONE
) {
1584 assert(0 && "cannot choose a format for src of CopyPixels");
1589 /* Invert src region if needed */
1590 if (st_fb_orientation(ctx
->ReadBuffer
) == Y_0_TOP
) {
1591 srcy
= ctx
->ReadBuffer
->Height
- srcy
- height
;
1592 invertTex
= !invertTex
;
1595 /* Clip the read region against the src buffer bounds.
1596 * We'll still allocate a temporary buffer/texture for the original
1597 * src region size but we'll only read the region which is on-screen.
1598 * This may mean that we draw garbage pixels into the dest region, but
1605 if (!_mesa_clip_readpixels(ctx
, &readX
, &readY
, &readW
, &readH
, &pack
)) {
1606 /* The source region is completely out of bounds. Do nothing.
1607 * The GL spec says "Results of copies from outside the window,
1608 * or from regions of the window that are not exposed, are
1609 * hardware dependent and undefined."
1614 readW
= MAX2(0, readW
);
1615 readH
= MAX2(0, readH
);
1617 /* Allocate the temporary texture. */
1618 pt
= alloc_texture(st
, width
, height
, srcFormat
, srcBind
);
1622 sv
[0] = st_create_texture_sampler_view(st
->pipe
, pt
);
1624 pipe_resource_reference(&pt
, NULL
);
1628 /* Copy the src region to the temporary texture. */
1630 struct pipe_blit_info blit
;
1632 memset(&blit
, 0, sizeof(blit
));
1633 blit
.src
.resource
= rbRead
->texture
;
1634 blit
.src
.level
= rbRead
->surface
->u
.tex
.level
;
1635 blit
.src
.format
= rbRead
->texture
->format
;
1636 blit
.src
.box
.x
= readX
;
1637 blit
.src
.box
.y
= readY
;
1638 blit
.src
.box
.z
= rbRead
->surface
->u
.tex
.first_layer
;
1639 blit
.src
.box
.width
= readW
;
1640 blit
.src
.box
.height
= readH
;
1641 blit
.src
.box
.depth
= 1;
1642 blit
.dst
.resource
= pt
;
1644 blit
.dst
.format
= pt
->format
;
1645 blit
.dst
.box
.x
= pack
.SkipPixels
;
1646 blit
.dst
.box
.y
= pack
.SkipRows
;
1648 blit
.dst
.box
.width
= readW
;
1649 blit
.dst
.box
.height
= readH
;
1650 blit
.dst
.box
.depth
= 1;
1651 blit
.mask
= util_format_get_mask(pt
->format
) & ~PIPE_MASK_S
;
1652 blit
.filter
= PIPE_TEX_FILTER_NEAREST
;
1654 pipe
->blit(pipe
, &blit
);
1657 /* OK, the texture 'pt' contains the src image/pixels. Now draw a
1658 * textured quad with that texture.
1660 draw_textured_quad(ctx
, dstx
, dsty
, ctx
->Current
.RasterPos
[2],
1661 width
, height
, ctx
->Pixel
.ZoomX
, ctx
->Pixel
.ZoomY
,
1666 color
, invertTex
, GL_FALSE
, GL_FALSE
);
1668 pipe_resource_reference(&pt
, NULL
);
1669 pipe_sampler_view_reference(&sv
[0], NULL
);
1674 void st_init_drawpixels_functions(struct dd_function_table
*functions
)
1676 functions
->DrawPixels
= st_DrawPixels
;
1677 functions
->CopyPixels
= st_CopyPixels
;
1682 st_destroy_drawpix(struct st_context
*st
)
1686 for (i
= 0; i
< Elements(st
->drawpix
.shaders
); i
++) {
1687 if (st
->drawpix
.shaders
[i
])
1688 _mesa_reference_fragprog(st
->ctx
, &st
->drawpix
.shaders
[i
], NULL
);
1691 st_reference_fragprog(st
, &st
->pixel_xfer
.combined_prog
, NULL
);
1692 if (st
->drawpix
.vert_shaders
[0])
1693 cso_delete_vertex_shader(st
->cso_context
, st
->drawpix
.vert_shaders
[0]);
1694 if (st
->drawpix
.vert_shaders
[1])
1695 cso_delete_vertex_shader(st
->cso_context
, st
->drawpix
.vert_shaders
[1]);