1 /**************************************************************************
3 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
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 TUNGSTEN GRAPHICS 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/macros.h"
37 #include "main/mfeatures.h"
38 #include "main/mtypes.h"
39 #include "main/pack.h"
41 #include "main/texformat.h"
42 #include "main/teximage.h"
43 #include "main/texstore.h"
44 #include "program/program.h"
45 #include "program/prog_print.h"
46 #include "program/prog_instruction.h"
49 #include "st_atom_constbuf.h"
50 #include "st_cb_drawpixels.h"
51 #include "st_cb_readpixels.h"
52 #include "st_cb_fbo.h"
53 #include "st_context.h"
55 #include "st_format.h"
56 #include "st_program.h"
57 #include "st_texture.h"
59 #include "pipe/p_context.h"
60 #include "pipe/p_defines.h"
61 #include "tgsi/tgsi_ureg.h"
62 #include "util/u_draw_quad.h"
63 #include "util/u_format.h"
64 #include "util/u_inlines.h"
65 #include "util/u_math.h"
66 #include "util/u_tile.h"
67 #include "cso_cache/cso_context.h"
73 * Check if the given program is:
74 * 0: MOVE result.color, fragment.color;
78 is_passthrough_program(const struct gl_fragment_program
*prog
)
80 if (prog
->Base
.NumInstructions
== 2) {
81 const struct prog_instruction
*inst
= prog
->Base
.Instructions
;
82 if (inst
[0].Opcode
== OPCODE_MOV
&&
83 inst
[1].Opcode
== OPCODE_END
&&
84 inst
[0].DstReg
.File
== PROGRAM_OUTPUT
&&
85 inst
[0].DstReg
.Index
== FRAG_RESULT_COLOR
&&
86 inst
[0].DstReg
.WriteMask
== WRITEMASK_XYZW
&&
87 inst
[0].SrcReg
[0].File
== PROGRAM_INPUT
&&
88 inst
[0].SrcReg
[0].Index
== FRAG_ATTRIB_COL0
&&
89 inst
[0].SrcReg
[0].Swizzle
== SWIZZLE_XYZW
) {
99 * Make fragment shader for glDraw/CopyPixels. This shader is made
100 * by combining the pixel transfer shader with the user-defined shader.
101 * \param fpIn the current/incoming fragment program
102 * \param fpOut returns the combined fragment program
105 st_make_drawpix_fragment_program(struct st_context
*st
,
106 struct gl_fragment_program
*fpIn
,
107 struct gl_fragment_program
**fpOut
)
109 struct gl_program
*newProg
;
111 if (is_passthrough_program(fpIn
)) {
112 newProg
= (struct gl_program
*) _mesa_clone_fragment_program(st
->ctx
,
113 &st
->pixel_xfer
.program
->Base
);
118 printf("Base program:\n");
119 _mesa_print_program(&fpIn
->Base
);
120 printf("DrawPix program:\n");
121 _mesa_print_program(&st
->pixel_xfer
.program
->Base
.Base
);
123 newProg
= _mesa_combine_programs(st
->ctx
,
124 &st
->pixel_xfer
.program
->Base
.Base
,
130 printf("Combined DrawPixels program:\n");
131 _mesa_print_program(newProg
);
132 printf("InputsRead: 0x%x\n", newProg
->InputsRead
);
133 printf("OutputsWritten: 0x%x\n", newProg
->OutputsWritten
);
134 _mesa_print_parameter_list(newProg
->Parameters
);
137 *fpOut
= (struct gl_fragment_program
*) newProg
;
142 * Create fragment program that does a TEX() instruction to get a Z and/or
143 * stencil value value, then writes to FRAG_RESULT_DEPTH/FRAG_RESULT_STENCIL.
144 * Used for glDrawPixels(GL_DEPTH_COMPONENT / GL_STENCIL_INDEX).
145 * Pass fragment color through as-is.
146 * \return pointer to the gl_fragment program
148 struct gl_fragment_program
*
149 st_make_drawpix_z_stencil_program(struct st_context
*st
,
150 GLboolean write_depth
,
151 GLboolean write_stencil
)
153 struct gl_context
*ctx
= st
->ctx
;
154 struct gl_program
*p
;
155 struct gl_fragment_program
*fp
;
157 const GLuint shaderIndex
= write_depth
* 2 + write_stencil
;
159 assert(shaderIndex
< Elements(st
->drawpix
.shaders
));
161 if (st
->drawpix
.shaders
[shaderIndex
]) {
162 /* already have the proper shader */
163 return st
->drawpix
.shaders
[shaderIndex
];
169 p
= ctx
->Driver
.NewProgram(ctx
, GL_FRAGMENT_PROGRAM_ARB
, 0);
173 p
->NumInstructions
= write_depth
? 2 : 1;
174 p
->NumInstructions
+= write_stencil
? 1 : 0;
176 p
->Instructions
= _mesa_alloc_instructions(p
->NumInstructions
);
177 if (!p
->Instructions
) {
178 ctx
->Driver
.DeleteProgram(ctx
, p
);
181 _mesa_init_instructions(p
->Instructions
, p
->NumInstructions
);
184 /* TEX result.depth, fragment.texcoord[0], texture[0], 2D; */
185 p
->Instructions
[ic
].Opcode
= OPCODE_TEX
;
186 p
->Instructions
[ic
].DstReg
.File
= PROGRAM_OUTPUT
;
187 p
->Instructions
[ic
].DstReg
.Index
= FRAG_RESULT_DEPTH
;
188 p
->Instructions
[ic
].DstReg
.WriteMask
= WRITEMASK_Z
;
189 p
->Instructions
[ic
].SrcReg
[0].File
= PROGRAM_INPUT
;
190 p
->Instructions
[ic
].SrcReg
[0].Index
= FRAG_ATTRIB_TEX0
;
191 p
->Instructions
[ic
].TexSrcUnit
= 0;
192 p
->Instructions
[ic
].TexSrcTarget
= TEXTURE_2D_INDEX
;
197 /* TEX result.stencil, fragment.texcoord[0], texture[0], 2D; */
198 p
->Instructions
[ic
].Opcode
= OPCODE_TEX
;
199 p
->Instructions
[ic
].DstReg
.File
= PROGRAM_OUTPUT
;
200 p
->Instructions
[ic
].DstReg
.Index
= FRAG_RESULT_STENCIL
;
201 p
->Instructions
[ic
].DstReg
.WriteMask
= WRITEMASK_Y
;
202 p
->Instructions
[ic
].SrcReg
[0].File
= PROGRAM_INPUT
;
203 p
->Instructions
[ic
].SrcReg
[0].Index
= FRAG_ATTRIB_TEX0
;
204 p
->Instructions
[ic
].TexSrcUnit
= 1;
205 p
->Instructions
[ic
].TexSrcTarget
= TEXTURE_2D_INDEX
;
210 p
->Instructions
[ic
++].Opcode
= OPCODE_END
;
212 assert(ic
== p
->NumInstructions
);
214 p
->InputsRead
= FRAG_BIT_TEX0
| FRAG_BIT_COL0
;
215 p
->OutputsWritten
= 0;
217 p
->OutputsWritten
|= BITFIELD64_BIT(FRAG_RESULT_DEPTH
);
219 p
->OutputsWritten
|= BITFIELD64_BIT(FRAG_RESULT_STENCIL
);
221 p
->SamplersUsed
= 0x1; /* sampler 0 (bit 0) is used */
223 p
->SamplersUsed
|= 1 << 1;
225 fp
= (struct gl_fragment_program
*) p
;
227 /* save the new shader */
228 st
->drawpix
.shaders
[shaderIndex
] = fp
;
235 * Create a simple vertex shader that just passes through the
236 * vertex position and texcoord (and optionally, color).
239 make_passthrough_vertex_shader(struct st_context
*st
,
242 if (!st
->drawpix
.vert_shaders
[passColor
]) {
243 struct ureg_program
*ureg
= ureg_create( TGSI_PROCESSOR_VERTEX
);
248 /* MOV result.pos, vertex.pos; */
250 ureg_DECL_output( ureg
, TGSI_SEMANTIC_POSITION
, 0 ),
251 ureg_DECL_vs_input( ureg
, 0 ));
253 /* MOV result.texcoord0, vertex.attr[1]; */
255 ureg_DECL_output( ureg
, TGSI_SEMANTIC_GENERIC
, 0 ),
256 ureg_DECL_vs_input( ureg
, 1 ));
259 /* MOV result.color0, vertex.attr[2]; */
261 ureg_DECL_output( ureg
, TGSI_SEMANTIC_COLOR
, 0 ),
262 ureg_DECL_vs_input( ureg
, 2 ));
267 st
->drawpix
.vert_shaders
[passColor
] =
268 ureg_create_shader_and_destroy( ureg
, st
->pipe
);
271 return st
->drawpix
.vert_shaders
[passColor
];
276 * Return a texture internalFormat for drawing/copying an image
277 * of the given format and type.
280 internal_format(struct gl_context
*ctx
, GLenum format
, GLenum type
)
283 case GL_DEPTH_COMPONENT
:
285 case GL_UNSIGNED_SHORT
:
286 return GL_DEPTH_COMPONENT16
;
288 case GL_UNSIGNED_INT
:
289 return GL_DEPTH_COMPONENT32
;
292 if (ctx
->Extensions
.ARB_depth_buffer_float
)
293 return GL_DEPTH_COMPONENT32F
;
295 return GL_DEPTH_COMPONENT
;
298 return GL_DEPTH_COMPONENT
;
301 case GL_DEPTH_STENCIL
:
303 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV
:
304 return GL_DEPTH32F_STENCIL8
;
306 case GL_UNSIGNED_INT_24_8
:
308 return GL_DEPTH24_STENCIL8
;
311 case GL_STENCIL_INDEX
:
312 return GL_STENCIL_INDEX
;
315 if (_mesa_is_integer_format(format
)) {
319 case GL_UNSIGNED_BYTE
:
323 case GL_UNSIGNED_SHORT
:
327 case GL_UNSIGNED_INT
:
330 assert(0 && "Unexpected type in internal_format()");
331 return GL_RGBA_INTEGER
;
336 case GL_UNSIGNED_BYTE
:
337 case GL_UNSIGNED_INT_8_8_8_8
:
338 case GL_UNSIGNED_INT_8_8_8_8_REV
:
342 case GL_UNSIGNED_BYTE_3_3_2
:
343 case GL_UNSIGNED_BYTE_2_3_3_REV
:
344 case GL_UNSIGNED_SHORT_4_4_4_4
:
345 case GL_UNSIGNED_SHORT_4_4_4_4_REV
:
348 case GL_UNSIGNED_SHORT_5_6_5
:
349 case GL_UNSIGNED_SHORT_5_6_5_REV
:
350 case GL_UNSIGNED_SHORT_5_5_5_1
:
351 case GL_UNSIGNED_SHORT_1_5_5_5_REV
:
354 case GL_UNSIGNED_INT_10_10_10_2
:
355 case GL_UNSIGNED_INT_2_10_10_10_REV
:
358 case GL_UNSIGNED_SHORT
:
359 case GL_UNSIGNED_INT
:
364 ctx
->Extensions
.EXT_texture_snorm
? GL_RGBA8_SNORM
: GL_RGBA8
;
369 ctx
->Extensions
.EXT_texture_snorm
? GL_RGBA16_SNORM
: GL_RGBA16
;
371 case GL_HALF_FLOAT_ARB
:
373 ctx
->Extensions
.ARB_texture_float
? GL_RGBA16F
:
374 ctx
->Extensions
.EXT_texture_snorm
? GL_RGBA16_SNORM
: GL_RGBA16
;
379 ctx
->Extensions
.ARB_texture_float
? GL_RGBA32F
:
380 ctx
->Extensions
.EXT_texture_snorm
? GL_RGBA16_SNORM
: GL_RGBA16
;
382 case GL_UNSIGNED_INT_5_9_9_9_REV
:
383 assert(ctx
->Extensions
.EXT_texture_shared_exponent
);
386 case GL_UNSIGNED_INT_10F_11F_11F_REV
:
387 assert(ctx
->Extensions
.EXT_packed_float
);
388 return GL_R11F_G11F_B10F
;
396 * Create a temporary texture to hold an image of the given size.
397 * If width, height are not POT and the driver only handles POT textures,
398 * allocate the next larger size of texture that is POT.
400 static struct pipe_resource
*
401 alloc_texture(struct st_context
*st
, GLsizei width
, GLsizei height
,
402 enum pipe_format texFormat
)
404 struct pipe_resource
*pt
;
406 pt
= st_texture_create(st
, st
->internal_target
, texFormat
, 0,
407 width
, height
, 1, 1, PIPE_BIND_SAMPLER_VIEW
);
414 * Make texture containing an image for glDrawPixels image.
415 * If 'pixels' is NULL, leave the texture image data undefined.
417 static struct pipe_resource
*
418 make_texture(struct st_context
*st
,
419 GLsizei width
, GLsizei height
, GLenum format
, GLenum type
,
420 const struct gl_pixelstore_attrib
*unpack
,
421 const GLvoid
*pixels
)
423 struct gl_context
*ctx
= st
->ctx
;
424 struct pipe_context
*pipe
= st
->pipe
;
426 struct pipe_resource
*pt
;
427 enum pipe_format pipeFormat
;
428 GLenum baseInternalFormat
, intFormat
;
430 intFormat
= internal_format(ctx
, format
, type
);
431 baseInternalFormat
= _mesa_base_tex_format(ctx
, intFormat
);
433 mformat
= st_ChooseTextureFormat_renderable(ctx
, intFormat
,
434 format
, type
, GL_FALSE
);
437 pipeFormat
= st_mesa_format_to_pipe_format(mformat
);
440 pixels
= _mesa_map_pbo_source(ctx
, unpack
, pixels
);
444 /* alloc temporary texture */
445 pt
= alloc_texture(st
, width
, height
, pipeFormat
);
447 _mesa_unmap_pbo_source(ctx
, unpack
);
452 struct pipe_transfer
*transfer
;
453 static const GLuint dstImageOffsets
= 0;
456 const GLbitfield imageTransferStateSave
= ctx
->_ImageTransferState
;
458 /* we'll do pixel transfer in a fragment shader */
459 ctx
->_ImageTransferState
= 0x0;
461 transfer
= pipe_get_transfer(st
->pipe
, pt
, 0, 0,
462 PIPE_TRANSFER_WRITE
, 0, 0,
465 /* map texture transfer */
466 dest
= pipe_transfer_map(pipe
, transfer
);
469 /* Put image into texture transfer.
470 * Note that the image is actually going to be upside down in
471 * the texture. We deal with that with texcoords.
473 success
= _mesa_texstore(ctx
, 2, /* dims */
474 baseInternalFormat
, /* baseInternalFormat */
475 mformat
, /* gl_format */
477 0, 0, 0, /* dstX/Y/Zoffset */
478 transfer
->stride
, /* dstRowStride, bytes */
479 &dstImageOffsets
, /* dstImageOffsets */
480 width
, height
, 1, /* size */
481 format
, type
, /* src format/type */
482 pixels
, /* data source */
486 pipe_transfer_unmap(pipe
, transfer
);
487 pipe
->transfer_destroy(pipe
, transfer
);
492 ctx
->_ImageTransferState
= imageTransferStateSave
;
495 _mesa_unmap_pbo_source(ctx
, unpack
);
502 * Draw quad with texcoords and optional color.
503 * Coords are gallium window coords with y=0=top.
504 * \param color may be null
505 * \param invertTex if true, flip texcoords vertically
508 draw_quad(struct gl_context
*ctx
, GLfloat x0
, GLfloat y0
, GLfloat z
,
509 GLfloat x1
, GLfloat y1
, const GLfloat
*color
,
510 GLboolean invertTex
, GLfloat maxXcoord
, GLfloat maxYcoord
)
512 struct st_context
*st
= st_context(ctx
);
513 struct pipe_context
*pipe
= st
->pipe
;
514 GLfloat verts
[4][3][4]; /* four verts, three attribs, XYZW */
516 /* setup vertex data */
518 const struct gl_framebuffer
*fb
= st
->ctx
->DrawBuffer
;
519 const GLfloat fb_width
= (GLfloat
) fb
->Width
;
520 const GLfloat fb_height
= (GLfloat
) fb
->Height
;
521 const GLfloat clip_x0
= x0
/ fb_width
* 2.0f
- 1.0f
;
522 const GLfloat clip_y0
= y0
/ fb_height
* 2.0f
- 1.0f
;
523 const GLfloat clip_x1
= x1
/ fb_width
* 2.0f
- 1.0f
;
524 const GLfloat clip_y1
= y1
/ fb_height
* 2.0f
- 1.0f
;
525 const GLfloat sLeft
= 0.0f
, sRight
= maxXcoord
;
526 const GLfloat tTop
= invertTex
? maxYcoord
: 0.0f
;
527 const GLfloat tBot
= invertTex
? 0.0f
: maxYcoord
;
531 verts
[0][0][0] = clip_x0
; /* v[0].attr[0].x */
532 verts
[0][0][1] = clip_y0
; /* v[0].attr[0].y */
535 verts
[1][0][0] = clip_x1
;
536 verts
[1][0][1] = clip_y0
;
539 verts
[2][0][0] = clip_x1
;
540 verts
[2][0][1] = clip_y1
;
543 verts
[3][0][0] = clip_x0
;
544 verts
[3][0][1] = clip_y1
;
546 verts
[0][1][0] = sLeft
; /* v[0].attr[1].S */
547 verts
[0][1][1] = tTop
; /* v[0].attr[1].T */
548 verts
[1][1][0] = sRight
;
549 verts
[1][1][1] = tTop
;
550 verts
[2][1][0] = sRight
;
551 verts
[2][1][1] = tBot
;
552 verts
[3][1][0] = sLeft
;
553 verts
[3][1][1] = tBot
;
555 /* same for all verts: */
557 for (i
= 0; i
< 4; i
++) {
558 verts
[i
][0][2] = z
; /* v[i].attr[0].z */
559 verts
[i
][0][3] = 1.0f
; /* v[i].attr[0].w */
560 verts
[i
][2][0] = color
[0]; /* v[i].attr[2].r */
561 verts
[i
][2][1] = color
[1]; /* v[i].attr[2].g */
562 verts
[i
][2][2] = color
[2]; /* v[i].attr[2].b */
563 verts
[i
][2][3] = color
[3]; /* v[i].attr[2].a */
564 verts
[i
][1][2] = 0.0f
; /* v[i].attr[1].R */
565 verts
[i
][1][3] = 1.0f
; /* v[i].attr[1].Q */
569 for (i
= 0; i
< 4; i
++) {
570 verts
[i
][0][2] = z
; /*Z*/
571 verts
[i
][0][3] = 1.0f
; /*W*/
572 verts
[i
][1][2] = 0.0f
; /*R*/
573 verts
[i
][1][3] = 1.0f
; /*Q*/
579 struct pipe_resource
*buf
;
581 /* allocate/load buffer object with vertex data */
582 buf
= pipe_buffer_create(pipe
->screen
,
583 PIPE_BIND_VERTEX_BUFFER
,
586 pipe_buffer_write(st
->pipe
, buf
, 0, sizeof(verts
), verts
);
588 util_draw_vertex_buffer(pipe
, st
->cso_context
, buf
, 0,
591 3); /* attribs/vert */
592 pipe_resource_reference(&buf
, NULL
);
599 draw_textured_quad(struct gl_context
*ctx
, GLint x
, GLint y
, GLfloat z
,
600 GLsizei width
, GLsizei height
,
601 GLfloat zoomX
, GLfloat zoomY
,
602 struct pipe_sampler_view
**sv
,
603 int num_sampler_view
,
606 const GLfloat
*color
,
608 GLboolean write_depth
, GLboolean write_stencil
)
610 struct st_context
*st
= st_context(ctx
);
611 struct pipe_context
*pipe
= st
->pipe
;
612 struct cso_context
*cso
= st
->cso_context
;
613 GLfloat x0
, y0
, x1
, y1
;
615 boolean normalized
= sv
[0]->texture
->target
!= PIPE_TEXTURE_RECT
;
618 /* XXX if DrawPixels image is larger than max texture size, break
621 maxSize
= 1 << (pipe
->screen
->get_param(pipe
->screen
,
622 PIPE_CAP_MAX_TEXTURE_2D_LEVELS
) - 1);
623 assert(width
<= maxSize
);
624 assert(height
<= maxSize
);
626 cso_save_rasterizer(cso
);
627 cso_save_viewport(cso
);
628 cso_save_samplers(cso
);
629 cso_save_fragment_sampler_views(cso
);
630 cso_save_fragment_shader(cso
);
631 cso_save_vertex_shader(cso
);
632 cso_save_vertex_elements(cso
);
633 cso_save_vertex_buffers(cso
);
635 cso_save_depth_stencil_alpha(cso
);
639 /* rasterizer state: just scissor */
641 struct pipe_rasterizer_state rasterizer
;
642 memset(&rasterizer
, 0, sizeof(rasterizer
));
643 rasterizer
.clamp_fragment_color
= ctx
->Color
._ClampFragmentColor
;
644 rasterizer
.gl_rasterization_rules
= 1;
645 rasterizer
.scissor
= ctx
->Scissor
.Enabled
;
646 cso_set_rasterizer(cso
, &rasterizer
);
650 /* Stencil writing bypasses the normal fragment pipeline to
651 * disable color writing and set stencil test to always pass.
653 struct pipe_depth_stencil_alpha_state dsa
;
654 struct pipe_blend_state blend
;
657 memset(&dsa
, 0, sizeof(dsa
));
658 dsa
.stencil
[0].enabled
= 1;
659 dsa
.stencil
[0].func
= PIPE_FUNC_ALWAYS
;
660 dsa
.stencil
[0].writemask
= ctx
->Stencil
.WriteMask
[0] & 0xff;
661 dsa
.stencil
[0].zpass_op
= PIPE_STENCIL_OP_REPLACE
;
663 /* writing depth+stencil: depth test always passes */
664 dsa
.depth
.enabled
= 1;
665 dsa
.depth
.writemask
= ctx
->Depth
.Mask
;
666 dsa
.depth
.func
= PIPE_FUNC_ALWAYS
;
668 cso_set_depth_stencil_alpha(cso
, &dsa
);
670 /* blend (colormask) */
671 memset(&blend
, 0, sizeof(blend
));
672 cso_set_blend(cso
, &blend
);
675 /* fragment shader state: TEX lookup program */
676 cso_set_fragment_shader_handle(cso
, driver_fp
);
678 /* vertex shader state: position + texcoord pass-through */
679 cso_set_vertex_shader_handle(cso
, driver_vp
);
682 /* texture sampling state: */
684 struct pipe_sampler_state sampler
;
685 memset(&sampler
, 0, sizeof(sampler
));
686 sampler
.wrap_s
= PIPE_TEX_WRAP_CLAMP
;
687 sampler
.wrap_t
= PIPE_TEX_WRAP_CLAMP
;
688 sampler
.wrap_r
= PIPE_TEX_WRAP_CLAMP
;
689 sampler
.min_img_filter
= PIPE_TEX_FILTER_NEAREST
;
690 sampler
.min_mip_filter
= PIPE_TEX_MIPFILTER_NONE
;
691 sampler
.mag_img_filter
= PIPE_TEX_FILTER_NEAREST
;
692 sampler
.normalized_coords
= normalized
;
694 cso_single_sampler(cso
, 0, &sampler
);
695 if (num_sampler_view
> 1) {
696 cso_single_sampler(cso
, 1, &sampler
);
698 cso_single_sampler_done(cso
);
701 /* viewport state: viewport matching window dims */
703 const float w
= (float) ctx
->DrawBuffer
->Width
;
704 const float h
= (float) ctx
->DrawBuffer
->Height
;
705 struct pipe_viewport_state vp
;
706 vp
.scale
[0] = 0.5f
* w
;
707 vp
.scale
[1] = -0.5f
* h
;
710 vp
.translate
[0] = 0.5f
* w
;
711 vp
.translate
[1] = 0.5f
* h
;
712 vp
.translate
[2] = 0.5f
;
713 vp
.translate
[3] = 0.0f
;
714 cso_set_viewport(cso
, &vp
);
717 cso_set_vertex_elements(cso
, 3, st
->velems_util_draw
);
720 cso_set_fragment_sampler_views(cso
, num_sampler_view
, sv
);
722 /* Compute Gallium window coords (y=0=top) with pixel zoom.
723 * Recall that these coords are transformed by the current
724 * vertex shader and viewport transformation.
726 if (st_fb_orientation(ctx
->DrawBuffer
) == Y_0_BOTTOM
) {
727 y
= ctx
->DrawBuffer
->Height
- (int) (y
+ height
* ctx
->Pixel
.ZoomY
);
728 invertTex
= !invertTex
;
732 x1
= x
+ width
* ctx
->Pixel
.ZoomX
;
734 y1
= y
+ height
* ctx
->Pixel
.ZoomY
;
736 /* convert Z from [0,1] to [-1,-1] to match viewport Z scale/bias */
739 draw_quad(ctx
, x0
, y0
, z
, x1
, y1
, color
, invertTex
,
740 normalized
? ((GLfloat
) width
/ sv
[0]->texture
->width0
) : (GLfloat
)width
,
741 normalized
? ((GLfloat
) height
/ sv
[0]->texture
->height0
) : (GLfloat
)height
);
744 cso_restore_rasterizer(cso
);
745 cso_restore_viewport(cso
);
746 cso_restore_samplers(cso
);
747 cso_restore_fragment_sampler_views(cso
);
748 cso_restore_fragment_shader(cso
);
749 cso_restore_vertex_shader(cso
);
750 cso_restore_vertex_elements(cso
);
751 cso_restore_vertex_buffers(cso
);
753 cso_restore_depth_stencil_alpha(cso
);
754 cso_restore_blend(cso
);
760 * Software fallback to do glDrawPixels(GL_STENCIL_INDEX) when we
761 * can't use a fragment shader to write stencil values.
764 draw_stencil_pixels(struct gl_context
*ctx
, GLint x
, GLint y
,
765 GLsizei width
, GLsizei height
, GLenum format
, GLenum type
,
766 const struct gl_pixelstore_attrib
*unpack
,
767 const GLvoid
*pixels
)
769 struct st_context
*st
= st_context(ctx
);
770 struct pipe_context
*pipe
= st
->pipe
;
771 struct st_renderbuffer
*strb
;
772 enum pipe_transfer_usage usage
;
773 struct pipe_transfer
*pt
;
774 const GLboolean zoom
= ctx
->Pixel
.ZoomX
!= 1.0 || ctx
->Pixel
.ZoomY
!= 1.0;
777 struct gl_pixelstore_attrib clippedUnpack
= *unpack
;
780 if (!_mesa_clip_drawpixels(ctx
, &x
, &y
, &width
, &height
,
782 /* totally clipped */
787 strb
= st_renderbuffer(ctx
->DrawBuffer
->
788 Attachment
[BUFFER_STENCIL
].Renderbuffer
);
790 if (st_fb_orientation(ctx
->DrawBuffer
) == Y_0_TOP
) {
791 y
= ctx
->DrawBuffer
->Height
- y
- height
;
794 if(format
!= GL_DEPTH_STENCIL
&&
795 util_format_get_component_bits(strb
->format
,
796 UTIL_FORMAT_COLORSPACE_ZS
, 0) != 0)
797 usage
= PIPE_TRANSFER_READ_WRITE
;
799 usage
= PIPE_TRANSFER_WRITE
;
801 pt
= pipe_get_transfer(pipe
, strb
->texture
,
802 strb
->rtt_level
, strb
->rtt_face
+ strb
->rtt_slice
,
806 stmap
= pipe_transfer_map(pipe
, pt
);
808 pixels
= _mesa_map_pbo_source(ctx
, &clippedUnpack
, pixels
);
811 /* if width > MAX_WIDTH, have to process image in chunks */
813 while (skipPixels
< width
) {
814 const GLint spanX
= skipPixels
;
815 const GLint spanWidth
= MIN2(width
- skipPixels
, MAX_WIDTH
);
817 for (row
= 0; row
< height
; row
++) {
818 GLubyte sValues
[MAX_WIDTH
];
819 GLuint zValues
[MAX_WIDTH
];
820 GLfloat
*zValuesFloat
= (GLfloat
*)zValues
;
821 GLenum destType
= GL_UNSIGNED_BYTE
;
822 const GLvoid
*source
= _mesa_image_address2d(&clippedUnpack
, pixels
,
826 _mesa_unpack_stencil_span(ctx
, spanWidth
, destType
, sValues
,
827 type
, source
, &clippedUnpack
,
828 ctx
->_ImageTransferState
);
830 if (format
== GL_DEPTH_STENCIL
) {
832 pt
->resource
->format
== PIPE_FORMAT_Z32_FLOAT_S8X24_USCALED
?
833 GL_FLOAT
: GL_UNSIGNED_INT
;
835 _mesa_unpack_depth_span(ctx
, spanWidth
, ztype
, zValues
,
836 (1 << 24) - 1, type
, source
,
841 _mesa_problem(ctx
, "Gallium glDrawPixels(GL_STENCIL) with "
842 "zoom not complete");
848 if (st_fb_orientation(ctx
->DrawBuffer
) == Y_0_TOP
) {
849 spanY
= height
- row
- 1;
855 /* now pack the stencil (and Z) values in the dest format */
856 switch (pt
->resource
->format
) {
857 case PIPE_FORMAT_S8_USCALED
:
859 ubyte
*dest
= stmap
+ spanY
* pt
->stride
+ spanX
;
860 assert(usage
== PIPE_TRANSFER_WRITE
);
861 memcpy(dest
, sValues
, spanWidth
);
864 case PIPE_FORMAT_Z24_UNORM_S8_USCALED
:
865 if (format
== GL_DEPTH_STENCIL
) {
866 uint
*dest
= (uint
*) (stmap
+ spanY
* pt
->stride
+ spanX
*4);
868 assert(usage
== PIPE_TRANSFER_WRITE
);
869 for (k
= 0; k
< spanWidth
; k
++) {
870 dest
[k
] = zValues
[k
] | (sValues
[k
] << 24);
874 uint
*dest
= (uint
*) (stmap
+ spanY
* pt
->stride
+ spanX
*4);
876 assert(usage
== PIPE_TRANSFER_READ_WRITE
);
877 for (k
= 0; k
< spanWidth
; k
++) {
878 dest
[k
] = (dest
[k
] & 0xffffff) | (sValues
[k
] << 24);
882 case PIPE_FORMAT_S8_USCALED_Z24_UNORM
:
883 if (format
== GL_DEPTH_STENCIL
) {
884 uint
*dest
= (uint
*) (stmap
+ spanY
* pt
->stride
+ spanX
*4);
886 assert(usage
== PIPE_TRANSFER_WRITE
);
887 for (k
= 0; k
< spanWidth
; k
++) {
888 dest
[k
] = (zValues
[k
] << 8) | (sValues
[k
] & 0xff);
892 uint
*dest
= (uint
*) (stmap
+ spanY
* pt
->stride
+ spanX
*4);
894 assert(usage
== PIPE_TRANSFER_READ_WRITE
);
895 for (k
= 0; k
< spanWidth
; k
++) {
896 dest
[k
] = (dest
[k
] & 0xffffff00) | (sValues
[k
] & 0xff);
900 case PIPE_FORMAT_Z32_FLOAT_S8X24_USCALED
:
901 if (format
== GL_DEPTH_STENCIL
) {
902 uint
*dest
= (uint
*) (stmap
+ spanY
* pt
->stride
+ spanX
*4);
903 GLfloat
*destf
= (GLfloat
*)dest
;
905 assert(usage
== PIPE_TRANSFER_WRITE
);
906 for (k
= 0; k
< spanWidth
; k
++) {
907 destf
[k
*2] = zValuesFloat
[k
];
908 dest
[k
*2+1] = sValues
[k
] & 0xff;
912 uint
*dest
= (uint
*) (stmap
+ spanY
* pt
->stride
+ spanX
*4);
914 assert(usage
== PIPE_TRANSFER_READ_WRITE
);
915 for (k
= 0; k
< spanWidth
; k
++) {
916 dest
[k
*2+1] = sValues
[k
] & 0xff;
925 skipPixels
+= spanWidth
;
928 _mesa_unmap_pbo_source(ctx
, &clippedUnpack
);
930 /* unmap the stencil buffer */
931 pipe_transfer_unmap(pipe
, pt
);
932 pipe
->transfer_destroy(pipe
, pt
);
937 * Get fragment program variant for a glDrawPixels or glCopyPixels
938 * command for RGBA data.
940 static struct st_fp_variant
*
941 get_color_fp_variant(struct st_context
*st
)
943 struct gl_context
*ctx
= st
->ctx
;
944 struct st_fp_variant_key key
;
945 struct st_fp_variant
*fpv
;
947 memset(&key
, 0, sizeof(key
));
951 key
.scaleAndBias
= (ctx
->Pixel
.RedBias
!= 0.0 ||
952 ctx
->Pixel
.RedScale
!= 1.0 ||
953 ctx
->Pixel
.GreenBias
!= 0.0 ||
954 ctx
->Pixel
.GreenScale
!= 1.0 ||
955 ctx
->Pixel
.BlueBias
!= 0.0 ||
956 ctx
->Pixel
.BlueScale
!= 1.0 ||
957 ctx
->Pixel
.AlphaBias
!= 0.0 ||
958 ctx
->Pixel
.AlphaScale
!= 1.0);
959 key
.pixelMaps
= ctx
->Pixel
.MapColorFlag
;
961 fpv
= st_get_fp_variant(st
, st
->fp
, &key
);
968 * Get fragment program variant for a glDrawPixels or glCopyPixels
969 * command for depth/stencil data.
971 static struct st_fp_variant
*
972 get_depth_stencil_fp_variant(struct st_context
*st
, GLboolean write_depth
,
973 GLboolean write_stencil
)
975 struct st_fp_variant_key key
;
976 struct st_fp_variant
*fpv
;
978 memset(&key
, 0, sizeof(key
));
982 key
.drawpixels_z
= write_depth
;
983 key
.drawpixels_stencil
= write_stencil
;
985 fpv
= st_get_fp_variant(st
, st
->fp
, &key
);
992 * Called via ctx->Driver.DrawPixels()
995 st_DrawPixels(struct gl_context
*ctx
, GLint x
, GLint y
,
996 GLsizei width
, GLsizei height
,
997 GLenum format
, GLenum type
,
998 const struct gl_pixelstore_attrib
*unpack
, const GLvoid
*pixels
)
1000 void *driver_vp
, *driver_fp
;
1001 struct st_context
*st
= st_context(ctx
);
1002 const GLfloat
*color
;
1003 struct pipe_context
*pipe
= st
->pipe
;
1004 GLboolean write_stencil
= GL_FALSE
, write_depth
= GL_FALSE
;
1005 struct pipe_sampler_view
*sv
[2];
1006 int num_sampler_view
= 1;
1007 struct st_fp_variant
*fpv
;
1009 if (format
== GL_DEPTH_STENCIL
)
1010 write_stencil
= write_depth
= GL_TRUE
;
1011 else if (format
== GL_STENCIL_INDEX
)
1012 write_stencil
= GL_TRUE
;
1013 else if (format
== GL_DEPTH_COMPONENT
)
1014 write_depth
= GL_TRUE
;
1016 if (write_stencil
&&
1017 !pipe
->screen
->get_param(pipe
->screen
, PIPE_CAP_SHADER_STENCIL_EXPORT
)) {
1018 /* software fallback */
1019 draw_stencil_pixels(ctx
, x
, y
, width
, height
, format
, type
,
1024 /* Mesa state should be up to date by now */
1025 assert(ctx
->NewState
== 0x0);
1027 st_validate_state(st
);
1030 * Get vertex/fragment shaders
1032 if (write_depth
|| write_stencil
) {
1033 fpv
= get_depth_stencil_fp_variant(st
, write_depth
, write_stencil
);
1035 driver_fp
= fpv
->driver_shader
;
1037 driver_vp
= make_passthrough_vertex_shader(st
, GL_TRUE
);
1039 color
= ctx
->Current
.RasterColor
;
1042 fpv
= get_color_fp_variant(st
);
1044 driver_fp
= fpv
->driver_shader
;
1046 driver_vp
= make_passthrough_vertex_shader(st
, GL_FALSE
);
1049 if (st
->pixel_xfer
.pixelmap_enabled
) {
1050 sv
[1] = st
->pixel_xfer
.pixelmap_sampler_view
;
1055 /* update fragment program constants */
1056 st_upload_constants(st
, fpv
->parameters
, PIPE_SHADER_FRAGMENT
);
1058 /* draw with textured quad */
1060 struct pipe_resource
*pt
1061 = make_texture(st
, width
, height
, format
, type
, unpack
, pixels
);
1063 sv
[0] = st_create_texture_sampler_view(st
->pipe
, pt
);
1066 /* Create a second sampler view to read stencil.
1067 * The stencil is written using the shader stencil export
1069 if (write_stencil
) {
1070 enum pipe_format stencil_format
= PIPE_FORMAT_NONE
;
1072 switch (pt
->format
) {
1073 case PIPE_FORMAT_Z24_UNORM_S8_USCALED
:
1074 case PIPE_FORMAT_X24S8_USCALED
:
1075 stencil_format
= PIPE_FORMAT_X24S8_USCALED
;
1077 case PIPE_FORMAT_S8_USCALED_Z24_UNORM
:
1078 case PIPE_FORMAT_S8X24_USCALED
:
1079 stencil_format
= PIPE_FORMAT_S8X24_USCALED
;
1081 case PIPE_FORMAT_Z32_FLOAT_S8X24_USCALED
:
1082 case PIPE_FORMAT_X32_S8X24_USCALED
:
1083 stencil_format
= PIPE_FORMAT_X32_S8X24_USCALED
;
1085 case PIPE_FORMAT_S8_USCALED
:
1086 stencil_format
= PIPE_FORMAT_S8_USCALED
;
1092 sv
[1] = st_create_texture_sampler_view_format(st
->pipe
, pt
,
1097 draw_textured_quad(ctx
, x
, y
, ctx
->Current
.RasterPos
[2],
1099 ctx
->Pixel
.ZoomX
, ctx
->Pixel
.ZoomY
,
1104 color
, GL_FALSE
, write_depth
, write_stencil
);
1105 pipe_sampler_view_reference(&sv
[0], NULL
);
1106 if (num_sampler_view
> 1)
1107 pipe_sampler_view_reference(&sv
[1], NULL
);
1109 pipe_resource_reference(&pt
, NULL
);
1117 * Software fallback for glCopyPixels(GL_STENCIL).
1120 copy_stencil_pixels(struct gl_context
*ctx
, GLint srcx
, GLint srcy
,
1121 GLsizei width
, GLsizei height
,
1122 GLint dstx
, GLint dsty
)
1124 struct st_renderbuffer
*rbDraw
;
1125 struct pipe_context
*pipe
= st_context(ctx
)->pipe
;
1126 enum pipe_transfer_usage usage
;
1127 struct pipe_transfer
*ptDraw
;
1132 buffer
= malloc(width
* height
* sizeof(ubyte
));
1134 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glCopyPixels(stencil)");
1138 /* Get the dest renderbuffer. If there's a wrapper, use the
1139 * underlying renderbuffer.
1141 rbDraw
= st_renderbuffer(ctx
->DrawBuffer
->_StencilBuffer
);
1142 if (rbDraw
->Base
.Wrapped
)
1143 rbDraw
= st_renderbuffer(rbDraw
->Base
.Wrapped
);
1145 /* this will do stencil pixel transfer ops */
1146 st_read_stencil_pixels(ctx
, srcx
, srcy
, width
, height
,
1147 GL_STENCIL_INDEX
, GL_UNSIGNED_BYTE
,
1148 &ctx
->DefaultPacking
, buffer
);
1151 /* debug code: dump stencil values */
1153 for (row
= 0; row
< height
; row
++) {
1154 printf("%3d: ", row
);
1155 for (col
= 0; col
< width
; col
++) {
1156 printf("%02x ", buffer
[col
+ row
* width
]);
1162 if (util_format_get_component_bits(rbDraw
->format
,
1163 UTIL_FORMAT_COLORSPACE_ZS
, 0) != 0)
1164 usage
= PIPE_TRANSFER_READ_WRITE
;
1166 usage
= PIPE_TRANSFER_WRITE
;
1168 if (st_fb_orientation(ctx
->DrawBuffer
) == Y_0_TOP
) {
1169 dsty
= rbDraw
->Base
.Height
- dsty
- height
;
1172 ptDraw
= pipe_get_transfer(pipe
,
1175 rbDraw
->rtt_face
+ rbDraw
->rtt_slice
,
1179 assert(util_format_get_blockwidth(ptDraw
->resource
->format
) == 1);
1180 assert(util_format_get_blockheight(ptDraw
->resource
->format
) == 1);
1182 /* map the stencil buffer */
1183 drawMap
= pipe_transfer_map(pipe
, ptDraw
);
1186 /* XXX PixelZoom not handled yet */
1187 for (i
= 0; i
< height
; i
++) {
1194 if (st_fb_orientation(ctx
->DrawBuffer
) == Y_0_TOP
) {
1198 dst
= drawMap
+ y
* ptDraw
->stride
;
1199 src
= buffer
+ i
* width
;
1201 switch (ptDraw
->resource
->format
) {
1202 case PIPE_FORMAT_Z24_UNORM_S8_USCALED
:
1204 uint
*dst4
= (uint
*) dst
;
1206 assert(usage
== PIPE_TRANSFER_READ_WRITE
);
1207 for (j
= 0; j
< width
; j
++) {
1208 *dst4
= (*dst4
& 0xffffff) | (src
[j
] << 24);
1213 case PIPE_FORMAT_S8_USCALED_Z24_UNORM
:
1215 uint
*dst4
= (uint
*) dst
;
1217 assert(usage
== PIPE_TRANSFER_READ_WRITE
);
1218 for (j
= 0; j
< width
; j
++) {
1219 *dst4
= (*dst4
& 0xffffff00) | (src
[j
] & 0xff);
1224 case PIPE_FORMAT_S8_USCALED
:
1225 assert(usage
== PIPE_TRANSFER_WRITE
);
1226 memcpy(dst
, src
, width
);
1228 case PIPE_FORMAT_Z32_FLOAT_S8X24_USCALED
:
1230 uint
*dst4
= (uint
*) dst
;
1233 assert(usage
== PIPE_TRANSFER_READ_WRITE
);
1234 for (j
= 0; j
< width
; j
++) {
1235 *dst4
= src
[j
] & 0xff;
1247 /* unmap the stencil buffer */
1248 pipe_transfer_unmap(pipe
, ptDraw
);
1249 pipe
->transfer_destroy(pipe
, ptDraw
);
1253 /** Do the src/dest regions overlap? */
1255 regions_overlap(GLint srcX
, GLint srcY
, GLint dstX
, GLint dstY
,
1256 GLsizei width
, GLsizei height
)
1258 if (srcX
+ width
<= dstX
||
1259 dstX
+ width
<= srcX
||
1260 srcY
+ height
<= dstY
||
1261 dstY
+ height
<= srcY
)
1269 * Try to do a glCopyPixels for simple cases with a blit by calling
1270 * pipe->resource_copy_region().
1272 * We can do this when we're copying color pixels (depth/stencil
1273 * eventually) with no pixel zoom, no pixel transfer ops, no
1274 * per-fragment ops, the src/dest regions don't overlap and the
1275 * src/dest pixel formats are the same.
1278 blit_copy_pixels(struct gl_context
*ctx
, GLint srcx
, GLint srcy
,
1279 GLsizei width
, GLsizei height
,
1280 GLint dstx
, GLint dsty
, GLenum type
)
1282 struct st_context
*st
= st_context(ctx
);
1283 struct pipe_context
*pipe
= st
->pipe
;
1284 struct gl_pixelstore_attrib pack
, unpack
;
1285 GLint readX
, readY
, readW
, readH
;
1287 if (type
== GL_COLOR
&&
1288 ctx
->Pixel
.ZoomX
== 1.0 &&
1289 ctx
->Pixel
.ZoomY
== 1.0 &&
1290 ctx
->_ImageTransferState
== 0x0 &&
1291 !ctx
->Color
.BlendEnabled
&&
1292 !ctx
->Color
.AlphaEnabled
&&
1294 !ctx
->Fog
.Enabled
&&
1295 !ctx
->Stencil
.Enabled
&&
1296 !ctx
->FragmentProgram
.Enabled
&&
1297 !ctx
->VertexProgram
.Enabled
&&
1298 !ctx
->Shader
.CurrentFragmentProgram
&&
1299 st_fb_orientation(ctx
->ReadBuffer
) == st_fb_orientation(ctx
->DrawBuffer
) &&
1300 ctx
->DrawBuffer
->_NumColorDrawBuffers
== 1 &&
1301 !ctx
->Query
.CondRenderQuery
) {
1302 struct st_renderbuffer
*rbRead
, *rbDraw
;
1306 * Clip the read region against the src buffer bounds.
1307 * We'll still allocate a temporary buffer/texture for the original
1308 * src region size but we'll only read the region which is on-screen.
1309 * This may mean that we draw garbage pixels into the dest region, but
1316 pack
= ctx
->DefaultPacking
;
1317 if (!_mesa_clip_readpixels(ctx
, &readX
, &readY
, &readW
, &readH
, &pack
))
1318 return GL_TRUE
; /* all done */
1320 /* clip against dest buffer bounds and scissor box */
1321 drawX
= dstx
+ pack
.SkipPixels
;
1322 drawY
= dsty
+ pack
.SkipRows
;
1324 if (!_mesa_clip_drawpixels(ctx
, &drawX
, &drawY
, &readW
, &readH
, &unpack
))
1325 return GL_TRUE
; /* all done */
1327 readX
= readX
- pack
.SkipPixels
+ unpack
.SkipPixels
;
1328 readY
= readY
- pack
.SkipRows
+ unpack
.SkipRows
;
1330 rbRead
= st_get_color_read_renderbuffer(ctx
);
1331 rbDraw
= st_renderbuffer(ctx
->DrawBuffer
->_ColorDrawBuffers
[0]);
1333 if ((rbRead
!= rbDraw
||
1334 !regions_overlap(readX
, readY
, drawX
, drawY
, readW
, readH
)) &&
1335 rbRead
->Base
.Format
== rbDraw
->Base
.Format
) {
1336 struct pipe_box srcBox
;
1338 /* flip src/dst position if needed */
1339 if (st_fb_orientation(ctx
->ReadBuffer
) == Y_0_TOP
) {
1340 /* both buffers will have the same orientation */
1341 readY
= ctx
->ReadBuffer
->Height
- readY
- readH
;
1342 drawY
= ctx
->DrawBuffer
->Height
- drawY
- readH
;
1345 u_box_2d(readX
, readY
, readW
, readH
, &srcBox
);
1347 pipe
->resource_copy_region(pipe
,
1349 rbDraw
->rtt_level
, drawX
, drawY
, 0,
1351 rbRead
->rtt_level
, &srcBox
);
1361 st_CopyPixels(struct gl_context
*ctx
, GLint srcx
, GLint srcy
,
1362 GLsizei width
, GLsizei height
,
1363 GLint dstx
, GLint dsty
, GLenum type
)
1365 struct st_context
*st
= st_context(ctx
);
1366 struct pipe_context
*pipe
= st
->pipe
;
1367 struct pipe_screen
*screen
= pipe
->screen
;
1368 struct st_renderbuffer
*rbRead
;
1369 void *driver_vp
, *driver_fp
;
1370 struct pipe_resource
*pt
;
1371 struct pipe_sampler_view
*sv
[2];
1372 int num_sampler_view
= 1;
1374 enum pipe_format srcFormat
, texFormat
;
1375 GLboolean invertTex
= GL_FALSE
;
1376 GLint readX
, readY
, readW
, readH
;
1377 GLuint sample_count
;
1378 struct gl_pixelstore_attrib pack
= ctx
->DefaultPacking
;
1379 struct st_fp_variant
*fpv
;
1381 st_validate_state(st
);
1383 if (type
== GL_STENCIL
) {
1384 /* can't use texturing to do stencil */
1385 copy_stencil_pixels(ctx
, srcx
, srcy
, width
, height
, dstx
, dsty
);
1389 if (blit_copy_pixels(ctx
, srcx
, srcy
, width
, height
, dstx
, dsty
, type
))
1393 * The subsequent code implements glCopyPixels by copying the source
1394 * pixels into a temporary texture that's then applied to a textured quad.
1395 * When we draw the textured quad, all the usual per-fragment operations
1401 * Get vertex/fragment shaders
1403 if (type
== GL_COLOR
) {
1404 rbRead
= st_get_color_read_renderbuffer(ctx
);
1407 fpv
= get_color_fp_variant(st
);
1408 driver_fp
= fpv
->driver_shader
;
1410 driver_vp
= make_passthrough_vertex_shader(st
, GL_FALSE
);
1412 if (st
->pixel_xfer
.pixelmap_enabled
) {
1413 sv
[1] = st
->pixel_xfer
.pixelmap_sampler_view
;
1418 assert(type
== GL_DEPTH
);
1419 rbRead
= st_renderbuffer(ctx
->ReadBuffer
->_DepthBuffer
);
1420 color
= ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR0
];
1422 fpv
= get_depth_stencil_fp_variant(st
, GL_TRUE
, GL_FALSE
);
1423 driver_fp
= fpv
->driver_shader
;
1425 driver_vp
= make_passthrough_vertex_shader(st
, GL_TRUE
);
1428 /* update fragment program constants */
1429 st_upload_constants(st
, fpv
->parameters
, PIPE_SHADER_FRAGMENT
);
1432 if (rbRead
->Base
.Wrapped
)
1433 rbRead
= st_renderbuffer(rbRead
->Base
.Wrapped
);
1435 sample_count
= rbRead
->texture
->nr_samples
;
1436 /* I believe this would be legal, presumably would need to do a resolve
1437 for color, and for depth/stencil spec says to just use one of the
1438 depth/stencil samples per pixel? Need some transfer clarifications. */
1439 assert(sample_count
< 2);
1441 srcFormat
= rbRead
->texture
->format
;
1443 if (screen
->is_format_supported(screen
, srcFormat
, st
->internal_target
,
1445 PIPE_BIND_SAMPLER_VIEW
)) {
1446 texFormat
= srcFormat
;
1449 /* srcFormat can't be used as a texture format */
1450 if (type
== GL_DEPTH
) {
1451 texFormat
= st_choose_format(screen
, GL_DEPTH_COMPONENT
,
1452 GL_NONE
, GL_NONE
, st
->internal_target
,
1453 sample_count
, PIPE_BIND_DEPTH_STENCIL
);
1454 assert(texFormat
!= PIPE_FORMAT_NONE
);
1457 /* default color format */
1458 texFormat
= st_choose_format(screen
, GL_RGBA
,
1459 GL_NONE
, GL_NONE
, st
->internal_target
,
1460 sample_count
, PIPE_BIND_SAMPLER_VIEW
);
1461 assert(texFormat
!= PIPE_FORMAT_NONE
);
1465 /* Invert src region if needed */
1466 if (st_fb_orientation(ctx
->ReadBuffer
) == Y_0_TOP
) {
1467 srcy
= ctx
->ReadBuffer
->Height
- srcy
- height
;
1468 invertTex
= !invertTex
;
1471 /* Clip the read region against the src buffer bounds.
1472 * We'll still allocate a temporary buffer/texture for the original
1473 * src region size but we'll only read the region which is on-screen.
1474 * This may mean that we draw garbage pixels into the dest region, but
1481 _mesa_clip_readpixels(ctx
, &readX
, &readY
, &readW
, &readH
, &pack
);
1482 readW
= MAX2(0, readW
);
1483 readH
= MAX2(0, readH
);
1485 /* alloc temporary texture */
1486 pt
= alloc_texture(st
, width
, height
, texFormat
);
1490 sv
[0] = st_create_texture_sampler_view(st
->pipe
, pt
);
1492 pipe_resource_reference(&pt
, NULL
);
1496 /* Make temporary texture which is a copy of the src region.
1498 if (srcFormat
== texFormat
) {
1499 struct pipe_box src_box
;
1500 u_box_2d(readX
, readY
, readW
, readH
, &src_box
);
1501 /* copy source framebuffer surface into mipmap/texture */
1502 pipe
->resource_copy_region(pipe
,
1505 pack
.SkipPixels
, pack
.SkipRows
, 0, /* dest pos */
1506 rbRead
->texture
, /* src tex */
1507 rbRead
->rtt_level
, /* src lvl */
1512 /* CPU-based fallback/conversion */
1513 struct pipe_transfer
*ptRead
=
1514 pipe_get_transfer(st
->pipe
, rbRead
->texture
,
1516 rbRead
->rtt_face
+ rbRead
->rtt_slice
,
1518 readX
, readY
, readW
, readH
);
1519 struct pipe_transfer
*ptTex
;
1520 enum pipe_transfer_usage transfer_usage
;
1522 if (ST_DEBUG
& DEBUG_FALLBACK
)
1523 debug_printf("%s: fallback processing\n", __FUNCTION__
);
1525 if (type
== GL_DEPTH
&& util_format_is_depth_and_stencil(pt
->format
))
1526 transfer_usage
= PIPE_TRANSFER_READ_WRITE
;
1528 transfer_usage
= PIPE_TRANSFER_WRITE
;
1530 ptTex
= pipe_get_transfer(st
->pipe
, pt
, 0, 0, transfer_usage
,
1531 0, 0, width
, height
);
1533 /* copy image from ptRead surface to ptTex surface */
1534 if (type
== GL_COLOR
) {
1535 /* alternate path using get/put_tile() */
1536 GLfloat
*buf
= (GLfloat
*) malloc(width
* height
* 4 * sizeof(GLfloat
));
1537 enum pipe_format readFormat
, drawFormat
;
1538 readFormat
= util_format_linear(rbRead
->texture
->format
);
1539 drawFormat
= util_format_linear(pt
->format
);
1540 pipe_get_tile_rgba_format(pipe
, ptRead
, 0, 0, readW
, readH
,
1542 pipe_put_tile_rgba_format(pipe
, ptTex
, pack
.SkipPixels
, pack
.SkipRows
,
1543 readW
, readH
, drawFormat
, buf
);
1548 GLuint
*buf
= (GLuint
*) malloc(width
* height
* sizeof(GLuint
));
1549 pipe_get_tile_z(pipe
, ptRead
, 0, 0, readW
, readH
, buf
);
1550 pipe_put_tile_z(pipe
, ptTex
, pack
.SkipPixels
, pack
.SkipRows
,
1555 pipe
->transfer_destroy(pipe
, ptRead
);
1556 pipe
->transfer_destroy(pipe
, ptTex
);
1559 /* OK, the texture 'pt' contains the src image/pixels. Now draw a
1560 * textured quad with that texture.
1562 draw_textured_quad(ctx
, dstx
, dsty
, ctx
->Current
.RasterPos
[2],
1563 width
, height
, ctx
->Pixel
.ZoomX
, ctx
->Pixel
.ZoomY
,
1568 color
, invertTex
, GL_FALSE
, GL_FALSE
);
1570 pipe_resource_reference(&pt
, NULL
);
1571 pipe_sampler_view_reference(&sv
[0], NULL
);
1576 void st_init_drawpixels_functions(struct dd_function_table
*functions
)
1578 functions
->DrawPixels
= st_DrawPixels
;
1579 functions
->CopyPixels
= st_CopyPixels
;
1584 st_destroy_drawpix(struct st_context
*st
)
1588 for (i
= 0; i
< Elements(st
->drawpix
.shaders
); i
++) {
1589 if (st
->drawpix
.shaders
[i
])
1590 _mesa_reference_fragprog(st
->ctx
, &st
->drawpix
.shaders
[i
], NULL
);
1593 st_reference_fragprog(st
, &st
->pixel_xfer
.combined_prog
, NULL
);
1594 if (st
->drawpix
.vert_shaders
[0])
1595 ureg_free_tokens(st
->drawpix
.vert_shaders
[0]);
1596 if (st
->drawpix
.vert_shaders
[1])
1597 ureg_free_tokens(st
->drawpix
.vert_shaders
[1]);
1600 #endif /* FEATURE_drawpix */