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/texstore.h"
43 #include "program/program.h"
44 #include "program/prog_print.h"
45 #include "program/prog_instruction.h"
48 #include "st_atom_constbuf.h"
49 #include "st_cb_drawpixels.h"
50 #include "st_cb_readpixels.h"
51 #include "st_cb_fbo.h"
52 #include "st_context.h"
54 #include "st_format.h"
55 #include "st_program.h"
56 #include "st_texture.h"
58 #include "pipe/p_context.h"
59 #include "pipe/p_defines.h"
60 #include "tgsi/tgsi_ureg.h"
61 #include "util/u_draw_quad.h"
62 #include "util/u_format.h"
63 #include "util/u_inlines.h"
64 #include "util/u_math.h"
65 #include "util/u_tile.h"
66 #include "cso_cache/cso_context.h"
72 * Check if the given program is:
73 * 0: MOVE result.color, fragment.color;
77 is_passthrough_program(const struct gl_fragment_program
*prog
)
79 if (prog
->Base
.NumInstructions
== 2) {
80 const struct prog_instruction
*inst
= prog
->Base
.Instructions
;
81 if (inst
[0].Opcode
== OPCODE_MOV
&&
82 inst
[1].Opcode
== OPCODE_END
&&
83 inst
[0].DstReg
.File
== PROGRAM_OUTPUT
&&
84 inst
[0].DstReg
.Index
== FRAG_RESULT_COLOR
&&
85 inst
[0].DstReg
.WriteMask
== WRITEMASK_XYZW
&&
86 inst
[0].SrcReg
[0].File
== PROGRAM_INPUT
&&
87 inst
[0].SrcReg
[0].Index
== FRAG_ATTRIB_COL0
&&
88 inst
[0].SrcReg
[0].Swizzle
== SWIZZLE_XYZW
) {
98 * Make fragment shader for glDraw/CopyPixels. This shader is made
99 * by combining the pixel transfer shader with the user-defined shader.
100 * \param fpIn the current/incoming fragment program
101 * \param fpOut returns the combined fragment program
104 st_make_drawpix_fragment_program(struct st_context
*st
,
105 struct gl_fragment_program
*fpIn
,
106 struct gl_fragment_program
**fpOut
)
108 struct gl_program
*newProg
;
110 if (is_passthrough_program(fpIn
)) {
111 newProg
= (struct gl_program
*) _mesa_clone_fragment_program(st
->ctx
,
112 &st
->pixel_xfer
.program
->Base
);
117 printf("Base program:\n");
118 _mesa_print_program(&fpIn
->Base
);
119 printf("DrawPix program:\n");
120 _mesa_print_program(&st
->pixel_xfer
.program
->Base
.Base
);
122 newProg
= _mesa_combine_programs(st
->ctx
,
123 &st
->pixel_xfer
.program
->Base
.Base
,
129 printf("Combined DrawPixels program:\n");
130 _mesa_print_program(newProg
);
131 printf("InputsRead: 0x%x\n", newProg
->InputsRead
);
132 printf("OutputsWritten: 0x%x\n", newProg
->OutputsWritten
);
133 _mesa_print_parameter_list(newProg
->Parameters
);
136 *fpOut
= (struct gl_fragment_program
*) newProg
;
141 * Create fragment program that does a TEX() instruction to get a Z and/or
142 * stencil value value, then writes to FRAG_RESULT_DEPTH/FRAG_RESULT_STENCIL.
143 * Used for glDrawPixels(GL_DEPTH_COMPONENT / GL_STENCIL_INDEX).
144 * Pass fragment color through as-is.
145 * \return pointer to the gl_fragment program
147 struct gl_fragment_program
*
148 st_make_drawpix_z_stencil_program(struct st_context
*st
,
149 GLboolean write_depth
,
150 GLboolean write_stencil
)
152 struct gl_context
*ctx
= st
->ctx
;
153 struct gl_program
*p
;
154 struct gl_fragment_program
*fp
;
156 const GLuint shaderIndex
= write_depth
* 2 + write_stencil
;
158 assert(shaderIndex
< Elements(st
->drawpix
.shaders
));
160 if (st
->drawpix
.shaders
[shaderIndex
]) {
161 /* already have the proper shader */
162 return st
->drawpix
.shaders
[shaderIndex
];
168 p
= ctx
->Driver
.NewProgram(ctx
, GL_FRAGMENT_PROGRAM_ARB
, 0);
172 p
->NumInstructions
= write_depth
? 2 : 1;
173 p
->NumInstructions
+= write_stencil
? 1 : 0;
175 p
->Instructions
= _mesa_alloc_instructions(p
->NumInstructions
);
176 if (!p
->Instructions
) {
177 ctx
->Driver
.DeleteProgram(ctx
, p
);
180 _mesa_init_instructions(p
->Instructions
, p
->NumInstructions
);
183 /* TEX result.depth, fragment.texcoord[0], texture[0], 2D; */
184 p
->Instructions
[ic
].Opcode
= OPCODE_TEX
;
185 p
->Instructions
[ic
].DstReg
.File
= PROGRAM_OUTPUT
;
186 p
->Instructions
[ic
].DstReg
.Index
= FRAG_RESULT_DEPTH
;
187 p
->Instructions
[ic
].DstReg
.WriteMask
= WRITEMASK_Z
;
188 p
->Instructions
[ic
].SrcReg
[0].File
= PROGRAM_INPUT
;
189 p
->Instructions
[ic
].SrcReg
[0].Index
= FRAG_ATTRIB_TEX0
;
190 p
->Instructions
[ic
].TexSrcUnit
= 0;
191 p
->Instructions
[ic
].TexSrcTarget
= TEXTURE_2D_INDEX
;
196 /* TEX result.stencil, fragment.texcoord[0], texture[0], 2D; */
197 p
->Instructions
[ic
].Opcode
= OPCODE_TEX
;
198 p
->Instructions
[ic
].DstReg
.File
= PROGRAM_OUTPUT
;
199 p
->Instructions
[ic
].DstReg
.Index
= FRAG_RESULT_STENCIL
;
200 p
->Instructions
[ic
].DstReg
.WriteMask
= WRITEMASK_Y
;
201 p
->Instructions
[ic
].SrcReg
[0].File
= PROGRAM_INPUT
;
202 p
->Instructions
[ic
].SrcReg
[0].Index
= FRAG_ATTRIB_TEX0
;
203 p
->Instructions
[ic
].TexSrcUnit
= 1;
204 p
->Instructions
[ic
].TexSrcTarget
= TEXTURE_2D_INDEX
;
209 p
->Instructions
[ic
++].Opcode
= OPCODE_END
;
211 assert(ic
== p
->NumInstructions
);
213 p
->InputsRead
= FRAG_BIT_TEX0
| FRAG_BIT_COL0
;
214 p
->OutputsWritten
= 0;
216 p
->OutputsWritten
|= BITFIELD64_BIT(FRAG_RESULT_DEPTH
);
218 p
->OutputsWritten
|= BITFIELD64_BIT(FRAG_RESULT_STENCIL
);
220 p
->SamplersUsed
= 0x1; /* sampler 0 (bit 0) is used */
222 p
->SamplersUsed
|= 1 << 1;
224 fp
= (struct gl_fragment_program
*) p
;
226 /* save the new shader */
227 st
->drawpix
.shaders
[shaderIndex
] = fp
;
234 * Create a simple vertex shader that just passes through the
235 * vertex position and texcoord (and optionally, color).
238 make_passthrough_vertex_shader(struct st_context
*st
,
241 if (!st
->drawpix
.vert_shaders
[passColor
]) {
242 struct ureg_program
*ureg
= ureg_create( TGSI_PROCESSOR_VERTEX
);
247 /* MOV result.pos, vertex.pos; */
249 ureg_DECL_output( ureg
, TGSI_SEMANTIC_POSITION
, 0 ),
250 ureg_DECL_vs_input( ureg
, 0 ));
252 /* MOV result.texcoord0, vertex.attr[1]; */
254 ureg_DECL_output( ureg
, TGSI_SEMANTIC_GENERIC
, 0 ),
255 ureg_DECL_vs_input( ureg
, 1 ));
258 /* MOV result.color0, vertex.attr[2]; */
260 ureg_DECL_output( ureg
, TGSI_SEMANTIC_COLOR
, 0 ),
261 ureg_DECL_vs_input( ureg
, 2 ));
266 st
->drawpix
.vert_shaders
[passColor
] =
267 ureg_create_shader_and_destroy( ureg
, st
->pipe
);
270 return st
->drawpix
.vert_shaders
[passColor
];
275 * Return a texture base format for drawing/copying an image
276 * of the given format.
279 base_format(GLenum format
)
282 case GL_DEPTH_COMPONENT
:
283 return GL_DEPTH_COMPONENT
;
284 case GL_DEPTH_STENCIL
:
285 return GL_DEPTH_STENCIL
;
286 case GL_STENCIL_INDEX
:
287 return GL_STENCIL_INDEX
;
295 * Return a texture internalFormat for drawing/copying an image
296 * of the given format and type.
299 internal_format(struct gl_context
*ctx
, GLenum format
, GLenum type
)
302 case GL_DEPTH_COMPONENT
:
303 return GL_DEPTH_COMPONENT
;
304 case GL_DEPTH_STENCIL
:
305 return GL_DEPTH_STENCIL
;
306 case GL_STENCIL_INDEX
:
307 return GL_STENCIL_INDEX
;
309 if (_mesa_is_integer_format(format
)) {
313 case GL_UNSIGNED_BYTE
:
317 case GL_UNSIGNED_SHORT
:
321 case GL_UNSIGNED_INT
:
324 assert(0 && "Unexpected type in internal_format()");
325 return GL_RGBA_INTEGER
;
330 case GL_UNSIGNED_BYTE
:
331 case GL_UNSIGNED_INT_8_8_8_8
:
332 case GL_UNSIGNED_INT_8_8_8_8_REV
:
336 case GL_UNSIGNED_BYTE_3_3_2
:
337 case GL_UNSIGNED_BYTE_2_3_3_REV
:
338 case GL_UNSIGNED_SHORT_4_4_4_4
:
339 case GL_UNSIGNED_SHORT_4_4_4_4_REV
:
342 case GL_UNSIGNED_SHORT_5_6_5
:
343 case GL_UNSIGNED_SHORT_5_6_5_REV
:
344 case GL_UNSIGNED_SHORT_5_5_5_1
:
345 case GL_UNSIGNED_SHORT_1_5_5_5_REV
:
348 case GL_UNSIGNED_INT_10_10_10_2
:
349 case GL_UNSIGNED_INT_2_10_10_10_REV
:
352 case GL_UNSIGNED_SHORT
:
353 case GL_UNSIGNED_INT
:
358 ctx
->Extensions
.EXT_texture_snorm
? GL_RGBA8_SNORM
: GL_RGBA8
;
363 ctx
->Extensions
.EXT_texture_snorm
? GL_RGBA16_SNORM
: GL_RGBA16
;
365 case GL_HALF_FLOAT_ARB
:
367 ctx
->Extensions
.ARB_texture_float
? GL_RGBA16F
:
368 ctx
->Extensions
.EXT_texture_snorm
? GL_RGBA16_SNORM
: GL_RGBA16
;
373 ctx
->Extensions
.ARB_texture_float
? GL_RGBA32F
:
374 ctx
->Extensions
.EXT_texture_snorm
? GL_RGBA16_SNORM
: GL_RGBA16
;
376 case GL_UNSIGNED_INT_5_9_9_9_REV
:
377 assert(ctx
->Extensions
.EXT_texture_shared_exponent
);
380 case GL_UNSIGNED_INT_10F_11F_11F_REV
:
381 assert(ctx
->Extensions
.EXT_packed_float
);
382 return GL_R11F_G11F_B10F
;
390 * Create a temporary texture to hold an image of the given size.
391 * If width, height are not POT and the driver only handles POT textures,
392 * allocate the next larger size of texture that is POT.
394 static struct pipe_resource
*
395 alloc_texture(struct st_context
*st
, GLsizei width
, GLsizei height
,
396 enum pipe_format texFormat
)
398 struct pipe_resource
*pt
;
400 pt
= st_texture_create(st
, st
->internal_target
, texFormat
, 0,
401 width
, height
, 1, 1, PIPE_BIND_SAMPLER_VIEW
);
408 * Make texture containing an image for glDrawPixels image.
409 * If 'pixels' is NULL, leave the texture image data undefined.
411 static struct pipe_resource
*
412 make_texture(struct st_context
*st
,
413 GLsizei width
, GLsizei height
, GLenum format
, GLenum type
,
414 const struct gl_pixelstore_attrib
*unpack
,
415 const GLvoid
*pixels
)
417 struct gl_context
*ctx
= st
->ctx
;
418 struct pipe_context
*pipe
= st
->pipe
;
420 struct pipe_resource
*pt
;
421 enum pipe_format pipeFormat
;
423 GLenum baseFormat
, intFormat
;
425 baseFormat
= base_format(format
);
426 intFormat
= internal_format(ctx
, format
, type
);
428 mformat
= st_ChooseTextureFormat_renderable(ctx
, intFormat
,
429 format
, type
, GL_FALSE
);
432 pipeFormat
= st_mesa_format_to_pipe_format(mformat
);
434 cpp
= util_format_get_blocksize(pipeFormat
);
436 pixels
= _mesa_map_pbo_source(ctx
, unpack
, pixels
);
440 /* alloc temporary texture */
441 pt
= alloc_texture(st
, width
, height
, pipeFormat
);
443 _mesa_unmap_pbo_source(ctx
, unpack
);
448 struct pipe_transfer
*transfer
;
449 static const GLuint dstImageOffsets
= 0;
452 const GLbitfield imageTransferStateSave
= ctx
->_ImageTransferState
;
454 /* we'll do pixel transfer in a fragment shader */
455 ctx
->_ImageTransferState
= 0x0;
457 transfer
= pipe_get_transfer(st
->pipe
, pt
, 0, 0,
458 PIPE_TRANSFER_WRITE
, 0, 0,
461 /* map texture transfer */
462 dest
= pipe_transfer_map(pipe
, transfer
);
465 /* Put image into texture transfer.
466 * Note that the image is actually going to be upside down in
467 * the texture. We deal with that with texcoords.
469 success
= _mesa_texstore(ctx
, 2, /* dims */
470 baseFormat
, /* baseInternalFormat */
471 mformat
, /* gl_format */
473 0, 0, 0, /* dstX/Y/Zoffset */
474 transfer
->stride
, /* dstRowStride, bytes */
475 &dstImageOffsets
, /* dstImageOffsets */
476 width
, height
, 1, /* size */
477 format
, type
, /* src format/type */
478 pixels
, /* data source */
482 pipe_transfer_unmap(pipe
, transfer
);
483 pipe
->transfer_destroy(pipe
, transfer
);
488 ctx
->_ImageTransferState
= imageTransferStateSave
;
491 _mesa_unmap_pbo_source(ctx
, unpack
);
498 * Draw quad with texcoords and optional color.
499 * Coords are gallium window coords with y=0=top.
500 * \param color may be null
501 * \param invertTex if true, flip texcoords vertically
504 draw_quad(struct gl_context
*ctx
, GLfloat x0
, GLfloat y0
, GLfloat z
,
505 GLfloat x1
, GLfloat y1
, const GLfloat
*color
,
506 GLboolean invertTex
, GLfloat maxXcoord
, GLfloat maxYcoord
)
508 struct st_context
*st
= st_context(ctx
);
509 struct pipe_context
*pipe
= st
->pipe
;
510 GLfloat verts
[4][3][4]; /* four verts, three attribs, XYZW */
512 /* setup vertex data */
514 const struct gl_framebuffer
*fb
= st
->ctx
->DrawBuffer
;
515 const GLfloat fb_width
= (GLfloat
) fb
->Width
;
516 const GLfloat fb_height
= (GLfloat
) fb
->Height
;
517 const GLfloat clip_x0
= x0
/ fb_width
* 2.0f
- 1.0f
;
518 const GLfloat clip_y0
= y0
/ fb_height
* 2.0f
- 1.0f
;
519 const GLfloat clip_x1
= x1
/ fb_width
* 2.0f
- 1.0f
;
520 const GLfloat clip_y1
= y1
/ fb_height
* 2.0f
- 1.0f
;
521 const GLfloat sLeft
= 0.0f
, sRight
= maxXcoord
;
522 const GLfloat tTop
= invertTex
? maxYcoord
: 0.0f
;
523 const GLfloat tBot
= invertTex
? 0.0f
: maxYcoord
;
527 verts
[0][0][0] = clip_x0
; /* v[0].attr[0].x */
528 verts
[0][0][1] = clip_y0
; /* v[0].attr[0].y */
531 verts
[1][0][0] = clip_x1
;
532 verts
[1][0][1] = clip_y0
;
535 verts
[2][0][0] = clip_x1
;
536 verts
[2][0][1] = clip_y1
;
539 verts
[3][0][0] = clip_x0
;
540 verts
[3][0][1] = clip_y1
;
542 verts
[0][1][0] = sLeft
; /* v[0].attr[1].S */
543 verts
[0][1][1] = tTop
; /* v[0].attr[1].T */
544 verts
[1][1][0] = sRight
;
545 verts
[1][1][1] = tTop
;
546 verts
[2][1][0] = sRight
;
547 verts
[2][1][1] = tBot
;
548 verts
[3][1][0] = sLeft
;
549 verts
[3][1][1] = tBot
;
551 /* same for all verts: */
553 for (i
= 0; i
< 4; i
++) {
554 verts
[i
][0][2] = z
; /* v[i].attr[0].z */
555 verts
[i
][0][3] = 1.0f
; /* v[i].attr[0].w */
556 verts
[i
][2][0] = color
[0]; /* v[i].attr[2].r */
557 verts
[i
][2][1] = color
[1]; /* v[i].attr[2].g */
558 verts
[i
][2][2] = color
[2]; /* v[i].attr[2].b */
559 verts
[i
][2][3] = color
[3]; /* v[i].attr[2].a */
560 verts
[i
][1][2] = 0.0f
; /* v[i].attr[1].R */
561 verts
[i
][1][3] = 1.0f
; /* v[i].attr[1].Q */
565 for (i
= 0; i
< 4; i
++) {
566 verts
[i
][0][2] = z
; /*Z*/
567 verts
[i
][0][3] = 1.0f
; /*W*/
568 verts
[i
][1][2] = 0.0f
; /*R*/
569 verts
[i
][1][3] = 1.0f
; /*Q*/
575 struct pipe_resource
*buf
;
577 /* allocate/load buffer object with vertex data */
578 buf
= pipe_buffer_create(pipe
->screen
,
579 PIPE_BIND_VERTEX_BUFFER
,
582 pipe_buffer_write(st
->pipe
, buf
, 0, sizeof(verts
), verts
);
584 util_draw_vertex_buffer(pipe
, st
->cso_context
, buf
, 0,
587 3); /* attribs/vert */
588 pipe_resource_reference(&buf
, NULL
);
595 draw_textured_quad(struct gl_context
*ctx
, GLint x
, GLint y
, GLfloat z
,
596 GLsizei width
, GLsizei height
,
597 GLfloat zoomX
, GLfloat zoomY
,
598 struct pipe_sampler_view
**sv
,
599 int num_sampler_view
,
602 const GLfloat
*color
,
604 GLboolean write_depth
, GLboolean write_stencil
)
606 struct st_context
*st
= st_context(ctx
);
607 struct pipe_context
*pipe
= st
->pipe
;
608 struct cso_context
*cso
= st
->cso_context
;
609 GLfloat x0
, y0
, x1
, y1
;
611 boolean normalized
= sv
[0]->texture
->target
!= PIPE_TEXTURE_RECT
;
614 /* XXX if DrawPixels image is larger than max texture size, break
617 maxSize
= 1 << (pipe
->screen
->get_param(pipe
->screen
,
618 PIPE_CAP_MAX_TEXTURE_2D_LEVELS
) - 1);
619 assert(width
<= maxSize
);
620 assert(height
<= maxSize
);
622 cso_save_rasterizer(cso
);
623 cso_save_viewport(cso
);
624 cso_save_samplers(cso
);
625 cso_save_fragment_sampler_views(cso
);
626 cso_save_fragment_shader(cso
);
627 cso_save_vertex_shader(cso
);
628 cso_save_vertex_elements(cso
);
629 cso_save_vertex_buffers(cso
);
631 cso_save_depth_stencil_alpha(cso
);
635 /* rasterizer state: just scissor */
637 struct pipe_rasterizer_state rasterizer
;
638 memset(&rasterizer
, 0, sizeof(rasterizer
));
639 rasterizer
.clamp_fragment_color
= ctx
->Color
._ClampFragmentColor
;
640 rasterizer
.gl_rasterization_rules
= 1;
641 rasterizer
.scissor
= ctx
->Scissor
.Enabled
;
642 cso_set_rasterizer(cso
, &rasterizer
);
646 /* Stencil writing bypasses the normal fragment pipeline to
647 * disable color writing and set stencil test to always pass.
649 struct pipe_depth_stencil_alpha_state dsa
;
650 struct pipe_blend_state blend
;
653 memset(&dsa
, 0, sizeof(dsa
));
654 dsa
.stencil
[0].enabled
= 1;
655 dsa
.stencil
[0].func
= PIPE_FUNC_ALWAYS
;
656 dsa
.stencil
[0].writemask
= ctx
->Stencil
.WriteMask
[0] & 0xff;
657 dsa
.stencil
[0].zpass_op
= PIPE_STENCIL_OP_REPLACE
;
659 /* writing depth+stencil: depth test always passes */
660 dsa
.depth
.enabled
= 1;
661 dsa
.depth
.writemask
= ctx
->Depth
.Mask
;
662 dsa
.depth
.func
= PIPE_FUNC_ALWAYS
;
664 cso_set_depth_stencil_alpha(cso
, &dsa
);
666 /* blend (colormask) */
667 memset(&blend
, 0, sizeof(blend
));
668 cso_set_blend(cso
, &blend
);
671 /* fragment shader state: TEX lookup program */
672 cso_set_fragment_shader_handle(cso
, driver_fp
);
674 /* vertex shader state: position + texcoord pass-through */
675 cso_set_vertex_shader_handle(cso
, driver_vp
);
678 /* texture sampling state: */
680 struct pipe_sampler_state sampler
;
681 memset(&sampler
, 0, sizeof(sampler
));
682 sampler
.wrap_s
= PIPE_TEX_WRAP_CLAMP
;
683 sampler
.wrap_t
= PIPE_TEX_WRAP_CLAMP
;
684 sampler
.wrap_r
= PIPE_TEX_WRAP_CLAMP
;
685 sampler
.min_img_filter
= PIPE_TEX_FILTER_NEAREST
;
686 sampler
.min_mip_filter
= PIPE_TEX_MIPFILTER_NONE
;
687 sampler
.mag_img_filter
= PIPE_TEX_FILTER_NEAREST
;
688 sampler
.normalized_coords
= normalized
;
690 cso_single_sampler(cso
, 0, &sampler
);
691 if (num_sampler_view
> 1) {
692 cso_single_sampler(cso
, 1, &sampler
);
694 cso_single_sampler_done(cso
);
697 /* viewport state: viewport matching window dims */
699 const float w
= (float) ctx
->DrawBuffer
->Width
;
700 const float h
= (float) ctx
->DrawBuffer
->Height
;
701 struct pipe_viewport_state vp
;
702 vp
.scale
[0] = 0.5f
* w
;
703 vp
.scale
[1] = -0.5f
* h
;
706 vp
.translate
[0] = 0.5f
* w
;
707 vp
.translate
[1] = 0.5f
* h
;
708 vp
.translate
[2] = 0.5f
;
709 vp
.translate
[3] = 0.0f
;
710 cso_set_viewport(cso
, &vp
);
713 cso_set_vertex_elements(cso
, 3, st
->velems_util_draw
);
716 cso_set_fragment_sampler_views(cso
, num_sampler_view
, sv
);
718 /* Compute Gallium window coords (y=0=top) with pixel zoom.
719 * Recall that these coords are transformed by the current
720 * vertex shader and viewport transformation.
722 if (st_fb_orientation(ctx
->DrawBuffer
) == Y_0_BOTTOM
) {
723 y
= ctx
->DrawBuffer
->Height
- (int) (y
+ height
* ctx
->Pixel
.ZoomY
);
724 invertTex
= !invertTex
;
728 x1
= x
+ width
* ctx
->Pixel
.ZoomX
;
730 y1
= y
+ height
* ctx
->Pixel
.ZoomY
;
732 /* convert Z from [0,1] to [-1,-1] to match viewport Z scale/bias */
735 draw_quad(ctx
, x0
, y0
, z
, x1
, y1
, color
, invertTex
,
736 normalized
? ((GLfloat
) width
/ sv
[0]->texture
->width0
) : (GLfloat
)width
,
737 normalized
? ((GLfloat
) height
/ sv
[0]->texture
->height0
) : (GLfloat
)height
);
740 cso_restore_rasterizer(cso
);
741 cso_restore_viewport(cso
);
742 cso_restore_samplers(cso
);
743 cso_restore_fragment_sampler_views(cso
);
744 cso_restore_fragment_shader(cso
);
745 cso_restore_vertex_shader(cso
);
746 cso_restore_vertex_elements(cso
);
747 cso_restore_vertex_buffers(cso
);
749 cso_restore_depth_stencil_alpha(cso
);
750 cso_restore_blend(cso
);
756 * Software fallback to do glDrawPixels(GL_STENCIL_INDEX) when we
757 * can't use a fragment shader to write stencil values.
760 draw_stencil_pixels(struct gl_context
*ctx
, GLint x
, GLint y
,
761 GLsizei width
, GLsizei height
, GLenum format
, GLenum type
,
762 const struct gl_pixelstore_attrib
*unpack
,
763 const GLvoid
*pixels
)
765 struct st_context
*st
= st_context(ctx
);
766 struct pipe_context
*pipe
= st
->pipe
;
767 struct st_renderbuffer
*strb
;
768 enum pipe_transfer_usage usage
;
769 struct pipe_transfer
*pt
;
770 const GLboolean zoom
= ctx
->Pixel
.ZoomX
!= 1.0 || ctx
->Pixel
.ZoomY
!= 1.0;
773 struct gl_pixelstore_attrib clippedUnpack
= *unpack
;
776 if (!_mesa_clip_drawpixels(ctx
, &x
, &y
, &width
, &height
,
778 /* totally clipped */
783 strb
= st_renderbuffer(ctx
->DrawBuffer
->
784 Attachment
[BUFFER_STENCIL
].Renderbuffer
);
786 if (st_fb_orientation(ctx
->DrawBuffer
) == Y_0_TOP
) {
787 y
= ctx
->DrawBuffer
->Height
- y
- height
;
790 if(format
!= GL_DEPTH_STENCIL
&&
791 util_format_get_component_bits(strb
->format
,
792 UTIL_FORMAT_COLORSPACE_ZS
, 0) != 0)
793 usage
= PIPE_TRANSFER_READ_WRITE
;
795 usage
= PIPE_TRANSFER_WRITE
;
797 pt
= pipe_get_transfer(st_context(ctx
)->pipe
, strb
->texture
, 0, 0,
801 stmap
= pipe_transfer_map(pipe
, pt
);
803 pixels
= _mesa_map_pbo_source(ctx
, &clippedUnpack
, pixels
);
806 /* if width > MAX_WIDTH, have to process image in chunks */
808 while (skipPixels
< width
) {
809 const GLint spanX
= skipPixels
;
810 const GLint spanWidth
= MIN2(width
- skipPixels
, MAX_WIDTH
);
812 for (row
= 0; row
< height
; row
++) {
813 GLubyte sValues
[MAX_WIDTH
];
814 GLuint zValues
[MAX_WIDTH
];
815 GLenum destType
= GL_UNSIGNED_BYTE
;
816 const GLvoid
*source
= _mesa_image_address2d(&clippedUnpack
, pixels
,
820 _mesa_unpack_stencil_span(ctx
, spanWidth
, destType
, sValues
,
821 type
, source
, &clippedUnpack
,
822 ctx
->_ImageTransferState
);
824 if (format
== GL_DEPTH_STENCIL
) {
825 _mesa_unpack_depth_span(ctx
, spanWidth
, GL_UNSIGNED_INT
, zValues
,
826 (1 << 24) - 1, type
, source
,
831 _mesa_problem(ctx
, "Gallium glDrawPixels(GL_STENCIL) with "
832 "zoom not complete");
838 if (st_fb_orientation(ctx
->DrawBuffer
) == Y_0_TOP
) {
839 spanY
= height
- row
- 1;
845 /* now pack the stencil (and Z) values in the dest format */
846 switch (pt
->resource
->format
) {
847 case PIPE_FORMAT_S8_USCALED
:
849 ubyte
*dest
= stmap
+ spanY
* pt
->stride
+ spanX
;
850 assert(usage
== PIPE_TRANSFER_WRITE
);
851 memcpy(dest
, sValues
, spanWidth
);
854 case PIPE_FORMAT_Z24_UNORM_S8_USCALED
:
855 if (format
== GL_DEPTH_STENCIL
) {
856 uint
*dest
= (uint
*) (stmap
+ spanY
* pt
->stride
+ spanX
*4);
858 assert(usage
== PIPE_TRANSFER_WRITE
);
859 for (k
= 0; k
< spanWidth
; k
++) {
860 dest
[k
] = zValues
[k
] | (sValues
[k
] << 24);
864 uint
*dest
= (uint
*) (stmap
+ spanY
* pt
->stride
+ spanX
*4);
866 assert(usage
== PIPE_TRANSFER_READ_WRITE
);
867 for (k
= 0; k
< spanWidth
; k
++) {
868 dest
[k
] = (dest
[k
] & 0xffffff) | (sValues
[k
] << 24);
872 case PIPE_FORMAT_S8_USCALED_Z24_UNORM
:
873 if (format
== GL_DEPTH_STENCIL
) {
874 uint
*dest
= (uint
*) (stmap
+ spanY
* pt
->stride
+ spanX
*4);
876 assert(usage
== PIPE_TRANSFER_WRITE
);
877 for (k
= 0; k
< spanWidth
; k
++) {
878 dest
[k
] = (zValues
[k
] << 8) | (sValues
[k
] & 0xff);
882 uint
*dest
= (uint
*) (stmap
+ spanY
* pt
->stride
+ spanX
*4);
884 assert(usage
== PIPE_TRANSFER_READ_WRITE
);
885 for (k
= 0; k
< spanWidth
; k
++) {
886 dest
[k
] = (dest
[k
] & 0xffffff00) | (sValues
[k
] & 0xff);
895 skipPixels
+= spanWidth
;
898 _mesa_unmap_pbo_source(ctx
, &clippedUnpack
);
900 /* unmap the stencil buffer */
901 pipe_transfer_unmap(pipe
, pt
);
902 pipe
->transfer_destroy(pipe
, pt
);
907 * Get fragment program variant for a glDrawPixels or glCopyPixels
908 * command for RGBA data.
910 static struct st_fp_variant
*
911 get_color_fp_variant(struct st_context
*st
)
913 struct gl_context
*ctx
= st
->ctx
;
914 struct st_fp_variant_key key
;
915 struct st_fp_variant
*fpv
;
917 memset(&key
, 0, sizeof(key
));
921 key
.scaleAndBias
= (ctx
->Pixel
.RedBias
!= 0.0 ||
922 ctx
->Pixel
.RedScale
!= 1.0 ||
923 ctx
->Pixel
.GreenBias
!= 0.0 ||
924 ctx
->Pixel
.GreenScale
!= 1.0 ||
925 ctx
->Pixel
.BlueBias
!= 0.0 ||
926 ctx
->Pixel
.BlueScale
!= 1.0 ||
927 ctx
->Pixel
.AlphaBias
!= 0.0 ||
928 ctx
->Pixel
.AlphaScale
!= 1.0);
929 key
.pixelMaps
= ctx
->Pixel
.MapColorFlag
;
931 fpv
= st_get_fp_variant(st
, st
->fp
, &key
);
938 * Get fragment program variant for a glDrawPixels or glCopyPixels
939 * command for depth/stencil data.
941 static struct st_fp_variant
*
942 get_depth_stencil_fp_variant(struct st_context
*st
, GLboolean write_depth
,
943 GLboolean write_stencil
)
945 struct st_fp_variant_key key
;
946 struct st_fp_variant
*fpv
;
948 memset(&key
, 0, sizeof(key
));
952 key
.drawpixels_z
= write_depth
;
953 key
.drawpixels_stencil
= write_stencil
;
955 fpv
= st_get_fp_variant(st
, st
->fp
, &key
);
962 * Called via ctx->Driver.DrawPixels()
965 st_DrawPixels(struct gl_context
*ctx
, GLint x
, GLint y
,
966 GLsizei width
, GLsizei height
,
967 GLenum format
, GLenum type
,
968 const struct gl_pixelstore_attrib
*unpack
, const GLvoid
*pixels
)
970 void *driver_vp
, *driver_fp
;
971 struct st_context
*st
= st_context(ctx
);
972 const GLfloat
*color
;
973 struct pipe_context
*pipe
= st
->pipe
;
974 GLboolean write_stencil
= GL_FALSE
, write_depth
= GL_FALSE
;
975 struct pipe_sampler_view
*sv
[2];
976 int num_sampler_view
= 1;
977 enum pipe_format stencil_format
= PIPE_FORMAT_NONE
;
978 struct st_fp_variant
*fpv
;
980 if (format
== GL_DEPTH_STENCIL
)
981 write_stencil
= write_depth
= GL_TRUE
;
982 else if (format
== GL_STENCIL_INDEX
)
983 write_stencil
= GL_TRUE
;
984 else if (format
== GL_DEPTH_COMPONENT
)
985 write_depth
= GL_TRUE
;
988 enum pipe_format tex_format
;
989 /* can we write to stencil if not fallback */
990 if (!pipe
->screen
->get_param(pipe
->screen
, PIPE_CAP_SHADER_STENCIL_EXPORT
))
991 goto stencil_fallback
;
993 tex_format
= st_choose_format(st
->pipe
->screen
, base_format(format
),
995 0, PIPE_BIND_SAMPLER_VIEW
);
996 if (tex_format
== PIPE_FORMAT_Z24_UNORM_S8_USCALED
)
997 stencil_format
= PIPE_FORMAT_X24S8_USCALED
;
998 else if (tex_format
== PIPE_FORMAT_S8_USCALED_Z24_UNORM
)
999 stencil_format
= PIPE_FORMAT_S8X24_USCALED
;
1001 stencil_format
= PIPE_FORMAT_S8_USCALED
;
1002 if (stencil_format
== PIPE_FORMAT_NONE
)
1003 goto stencil_fallback
;
1006 /* Mesa state should be up to date by now */
1007 assert(ctx
->NewState
== 0x0);
1009 st_validate_state(st
);
1012 * Get vertex/fragment shaders
1014 if (write_depth
|| write_stencil
) {
1015 fpv
= get_depth_stencil_fp_variant(st
, write_depth
, write_stencil
);
1017 driver_fp
= fpv
->driver_shader
;
1019 driver_vp
= make_passthrough_vertex_shader(st
, GL_TRUE
);
1021 color
= ctx
->Current
.RasterColor
;
1024 fpv
= get_color_fp_variant(st
);
1026 driver_fp
= fpv
->driver_shader
;
1028 driver_vp
= make_passthrough_vertex_shader(st
, GL_FALSE
);
1031 if (st
->pixel_xfer
.pixelmap_enabled
) {
1032 sv
[1] = st
->pixel_xfer
.pixelmap_sampler_view
;
1037 /* update fragment program constants */
1038 st_upload_constants(st
, fpv
->parameters
, PIPE_SHADER_FRAGMENT
);
1040 /* draw with textured quad */
1042 struct pipe_resource
*pt
1043 = make_texture(st
, width
, height
, format
, type
, unpack
, pixels
);
1045 sv
[0] = st_create_texture_sampler_view(st
->pipe
, pt
);
1048 if (write_stencil
) {
1049 sv
[1] = st_create_texture_sampler_view_format(st
->pipe
, pt
,
1054 draw_textured_quad(ctx
, x
, y
, ctx
->Current
.RasterPos
[2],
1056 ctx
->Pixel
.ZoomX
, ctx
->Pixel
.ZoomY
,
1061 color
, GL_FALSE
, write_depth
, write_stencil
);
1062 pipe_sampler_view_reference(&sv
[0], NULL
);
1063 if (num_sampler_view
> 1)
1064 pipe_sampler_view_reference(&sv
[1], NULL
);
1066 pipe_resource_reference(&pt
, NULL
);
1072 draw_stencil_pixels(ctx
, x
, y
, width
, height
, format
, type
,
1079 * Software fallback for glCopyPixels(GL_STENCIL).
1082 copy_stencil_pixels(struct gl_context
*ctx
, GLint srcx
, GLint srcy
,
1083 GLsizei width
, GLsizei height
,
1084 GLint dstx
, GLint dsty
)
1086 struct st_renderbuffer
*rbDraw
;
1087 struct pipe_context
*pipe
= st_context(ctx
)->pipe
;
1088 enum pipe_transfer_usage usage
;
1089 struct pipe_transfer
*ptDraw
;
1094 buffer
= malloc(width
* height
* sizeof(ubyte
));
1096 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glCopyPixels(stencil)");
1100 /* Get the dest renderbuffer. If there's a wrapper, use the
1101 * underlying renderbuffer.
1103 rbDraw
= st_renderbuffer(ctx
->DrawBuffer
->_StencilBuffer
);
1104 if (rbDraw
->Base
.Wrapped
)
1105 rbDraw
= st_renderbuffer(rbDraw
->Base
.Wrapped
);
1107 /* this will do stencil pixel transfer ops */
1108 st_read_stencil_pixels(ctx
, srcx
, srcy
, width
, height
,
1109 GL_STENCIL_INDEX
, GL_UNSIGNED_BYTE
,
1110 &ctx
->DefaultPacking
, buffer
);
1113 /* debug code: dump stencil values */
1115 for (row
= 0; row
< height
; row
++) {
1116 printf("%3d: ", row
);
1117 for (col
= 0; col
< width
; col
++) {
1118 printf("%02x ", buffer
[col
+ row
* width
]);
1124 if (util_format_get_component_bits(rbDraw
->format
,
1125 UTIL_FORMAT_COLORSPACE_ZS
, 0) != 0)
1126 usage
= PIPE_TRANSFER_READ_WRITE
;
1128 usage
= PIPE_TRANSFER_WRITE
;
1130 if (st_fb_orientation(ctx
->DrawBuffer
) == Y_0_TOP
) {
1131 dsty
= rbDraw
->Base
.Height
- dsty
- height
;
1134 ptDraw
= pipe_get_transfer(st_context(ctx
)->pipe
,
1135 rbDraw
->texture
, 0, 0,
1139 assert(util_format_get_blockwidth(ptDraw
->resource
->format
) == 1);
1140 assert(util_format_get_blockheight(ptDraw
->resource
->format
) == 1);
1142 /* map the stencil buffer */
1143 drawMap
= pipe_transfer_map(pipe
, ptDraw
);
1146 /* XXX PixelZoom not handled yet */
1147 for (i
= 0; i
< height
; i
++) {
1154 if (st_fb_orientation(ctx
->DrawBuffer
) == Y_0_TOP
) {
1158 dst
= drawMap
+ y
* ptDraw
->stride
;
1159 src
= buffer
+ i
* width
;
1161 switch (ptDraw
->resource
->format
) {
1162 case PIPE_FORMAT_Z24_UNORM_S8_USCALED
:
1164 uint
*dst4
= (uint
*) dst
;
1166 assert(usage
== PIPE_TRANSFER_READ_WRITE
);
1167 for (j
= 0; j
< width
; j
++) {
1168 *dst4
= (*dst4
& 0xffffff) | (src
[j
] << 24);
1173 case PIPE_FORMAT_S8_USCALED_Z24_UNORM
:
1175 uint
*dst4
= (uint
*) dst
;
1177 assert(usage
== PIPE_TRANSFER_READ_WRITE
);
1178 for (j
= 0; j
< width
; j
++) {
1179 *dst4
= (*dst4
& 0xffffff00) | (src
[j
] & 0xff);
1184 case PIPE_FORMAT_S8_USCALED
:
1185 assert(usage
== PIPE_TRANSFER_WRITE
);
1186 memcpy(dst
, src
, width
);
1195 /* unmap the stencil buffer */
1196 pipe_transfer_unmap(pipe
, ptDraw
);
1197 pipe
->transfer_destroy(pipe
, ptDraw
);
1201 /** Do the src/dest regions overlap? */
1203 regions_overlap(GLint srcX
, GLint srcY
, GLint dstX
, GLint dstY
,
1204 GLsizei width
, GLsizei height
)
1206 if (srcX
+ width
<= dstX
||
1207 dstX
+ width
<= srcX
||
1208 srcY
+ height
<= dstY
||
1209 dstY
+ height
<= srcY
)
1217 * Try to do a glCopyPixels for simple cases with a blit by calling
1218 * pipe->resource_copy_region().
1220 * We can do this when we're copying color pixels (depth/stencil
1221 * eventually) with no pixel zoom, no pixel transfer ops, no
1222 * per-fragment ops, the src/dest regions don't overlap and the
1223 * src/dest pixel formats are the same.
1226 blit_copy_pixels(struct gl_context
*ctx
, GLint srcx
, GLint srcy
,
1227 GLsizei width
, GLsizei height
,
1228 GLint dstx
, GLint dsty
, GLenum type
)
1230 struct st_context
*st
= st_context(ctx
);
1231 struct pipe_context
*pipe
= st
->pipe
;
1232 struct gl_pixelstore_attrib pack
, unpack
;
1233 GLint readX
, readY
, readW
, readH
;
1235 if (type
== GL_COLOR
&&
1236 ctx
->Pixel
.ZoomX
== 1.0 &&
1237 ctx
->Pixel
.ZoomY
== 1.0 &&
1238 ctx
->_ImageTransferState
== 0x0 &&
1239 !ctx
->Color
.BlendEnabled
&&
1240 !ctx
->Color
.AlphaEnabled
&&
1242 !ctx
->Fog
.Enabled
&&
1243 !ctx
->Stencil
.Enabled
&&
1244 !ctx
->FragmentProgram
.Enabled
&&
1245 !ctx
->VertexProgram
.Enabled
&&
1246 !ctx
->Shader
.CurrentFragmentProgram
&&
1247 st_fb_orientation(ctx
->ReadBuffer
) == st_fb_orientation(ctx
->DrawBuffer
) &&
1248 ctx
->DrawBuffer
->_NumColorDrawBuffers
== 1) {
1249 struct st_renderbuffer
*rbRead
, *rbDraw
;
1253 * Clip the read region against the src buffer bounds.
1254 * We'll still allocate a temporary buffer/texture for the original
1255 * src region size but we'll only read the region which is on-screen.
1256 * This may mean that we draw garbage pixels into the dest region, but
1263 pack
= ctx
->DefaultPacking
;
1264 if (!_mesa_clip_readpixels(ctx
, &readX
, &readY
, &readW
, &readH
, &pack
))
1265 return GL_TRUE
; /* all done */
1267 /* clip against dest buffer bounds and scissor box */
1268 drawX
= dstx
+ pack
.SkipPixels
;
1269 drawY
= dsty
+ pack
.SkipRows
;
1271 if (!_mesa_clip_drawpixels(ctx
, &drawX
, &drawY
, &readW
, &readH
, &unpack
))
1272 return GL_TRUE
; /* all done */
1274 readX
= readX
- pack
.SkipPixels
+ unpack
.SkipPixels
;
1275 readY
= readY
- pack
.SkipRows
+ unpack
.SkipRows
;
1277 rbRead
= st_get_color_read_renderbuffer(ctx
);
1278 rbDraw
= st_renderbuffer(ctx
->DrawBuffer
->_ColorDrawBuffers
[0]);
1280 if ((rbRead
!= rbDraw
||
1281 !regions_overlap(readX
, readY
, drawX
, drawY
, readW
, readH
)) &&
1282 rbRead
->Base
.Format
== rbDraw
->Base
.Format
) {
1283 struct pipe_box srcBox
;
1285 /* flip src/dst position if needed */
1286 if (st_fb_orientation(ctx
->ReadBuffer
) == Y_0_TOP
) {
1287 /* both buffers will have the same orientation */
1288 readY
= ctx
->ReadBuffer
->Height
- readY
- readH
;
1289 drawY
= ctx
->DrawBuffer
->Height
- drawY
- readH
;
1292 u_box_2d(readX
, readY
, readW
, readH
, &srcBox
);
1294 pipe
->resource_copy_region(pipe
,
1295 rbDraw
->texture
, 0, drawX
, drawY
, 0,
1296 rbRead
->texture
, 0, &srcBox
);
1306 st_CopyPixels(struct gl_context
*ctx
, GLint srcx
, GLint srcy
,
1307 GLsizei width
, GLsizei height
,
1308 GLint dstx
, GLint dsty
, GLenum type
)
1310 struct st_context
*st
= st_context(ctx
);
1311 struct pipe_context
*pipe
= st
->pipe
;
1312 struct pipe_screen
*screen
= pipe
->screen
;
1313 struct st_renderbuffer
*rbRead
;
1314 void *driver_vp
, *driver_fp
;
1315 struct pipe_resource
*pt
;
1316 struct pipe_sampler_view
*sv
[2];
1317 int num_sampler_view
= 1;
1319 enum pipe_format srcFormat
, texFormat
;
1320 GLboolean invertTex
= GL_FALSE
;
1321 GLint readX
, readY
, readW
, readH
;
1322 GLuint sample_count
;
1323 struct gl_pixelstore_attrib pack
= ctx
->DefaultPacking
;
1324 struct st_fp_variant
*fpv
;
1326 st_validate_state(st
);
1328 if (type
== GL_STENCIL
) {
1329 /* can't use texturing to do stencil */
1330 copy_stencil_pixels(ctx
, srcx
, srcy
, width
, height
, dstx
, dsty
);
1334 if (blit_copy_pixels(ctx
, srcx
, srcy
, width
, height
, dstx
, dsty
, type
))
1338 * The subsequent code implements glCopyPixels by copying the source
1339 * pixels into a temporary texture that's then applied to a textured quad.
1340 * When we draw the textured quad, all the usual per-fragment operations
1346 * Get vertex/fragment shaders
1348 if (type
== GL_COLOR
) {
1349 rbRead
= st_get_color_read_renderbuffer(ctx
);
1352 fpv
= get_color_fp_variant(st
);
1353 driver_fp
= fpv
->driver_shader
;
1355 driver_vp
= make_passthrough_vertex_shader(st
, GL_FALSE
);
1357 if (st
->pixel_xfer
.pixelmap_enabled
) {
1358 sv
[1] = st
->pixel_xfer
.pixelmap_sampler_view
;
1363 assert(type
== GL_DEPTH
);
1364 rbRead
= st_renderbuffer(ctx
->ReadBuffer
->_DepthBuffer
);
1365 color
= ctx
->Current
.Attrib
[VERT_ATTRIB_COLOR0
];
1367 fpv
= get_depth_stencil_fp_variant(st
, GL_TRUE
, GL_FALSE
);
1368 driver_fp
= fpv
->driver_shader
;
1370 driver_vp
= make_passthrough_vertex_shader(st
, GL_TRUE
);
1373 /* update fragment program constants */
1374 st_upload_constants(st
, fpv
->parameters
, PIPE_SHADER_FRAGMENT
);
1377 if (rbRead
->Base
.Wrapped
)
1378 rbRead
= st_renderbuffer(rbRead
->Base
.Wrapped
);
1380 sample_count
= rbRead
->texture
->nr_samples
;
1381 /* I believe this would be legal, presumably would need to do a resolve
1382 for color, and for depth/stencil spec says to just use one of the
1383 depth/stencil samples per pixel? Need some transfer clarifications. */
1384 assert(sample_count
< 2);
1386 srcFormat
= rbRead
->texture
->format
;
1388 if (screen
->is_format_supported(screen
, srcFormat
, st
->internal_target
,
1390 PIPE_BIND_SAMPLER_VIEW
)) {
1391 texFormat
= srcFormat
;
1394 /* srcFormat can't be used as a texture format */
1395 if (type
== GL_DEPTH
) {
1396 texFormat
= st_choose_format(screen
, GL_DEPTH_COMPONENT
,
1397 st
->internal_target
, sample_count
,
1398 PIPE_BIND_DEPTH_STENCIL
);
1399 assert(texFormat
!= PIPE_FORMAT_NONE
);
1402 /* default color format */
1403 texFormat
= st_choose_format(screen
, GL_RGBA
, st
->internal_target
,
1404 sample_count
, PIPE_BIND_SAMPLER_VIEW
);
1405 assert(texFormat
!= PIPE_FORMAT_NONE
);
1409 /* Invert src region if needed */
1410 if (st_fb_orientation(ctx
->ReadBuffer
) == Y_0_TOP
) {
1411 srcy
= ctx
->ReadBuffer
->Height
- srcy
- height
;
1412 invertTex
= !invertTex
;
1415 /* Clip the read region against the src buffer bounds.
1416 * We'll still allocate a temporary buffer/texture for the original
1417 * src region size but we'll only read the region which is on-screen.
1418 * This may mean that we draw garbage pixels into the dest region, but
1425 _mesa_clip_readpixels(ctx
, &readX
, &readY
, &readW
, &readH
, &pack
);
1426 readW
= MAX2(0, readW
);
1427 readH
= MAX2(0, readH
);
1429 /* alloc temporary texture */
1430 pt
= alloc_texture(st
, width
, height
, texFormat
);
1434 sv
[0] = st_create_texture_sampler_view(st
->pipe
, pt
);
1436 pipe_resource_reference(&pt
, NULL
);
1440 /* Make temporary texture which is a copy of the src region.
1442 if (srcFormat
== texFormat
) {
1443 struct pipe_box src_box
;
1444 u_box_2d(readX
, readY
, readW
, readH
, &src_box
);
1445 /* copy source framebuffer surface into mipmap/texture */
1446 pipe
->resource_copy_region(pipe
,
1449 pack
.SkipPixels
, pack
.SkipRows
, 0, /* dest pos */
1450 rbRead
->texture
, /* src tex */
1456 /* CPU-based fallback/conversion */
1457 struct pipe_transfer
*ptRead
=
1458 pipe_get_transfer(st
->pipe
, rbRead
->texture
,
1459 0, 0, /* level, layer */
1461 readX
, readY
, readW
, readH
);
1462 struct pipe_transfer
*ptTex
;
1463 enum pipe_transfer_usage transfer_usage
;
1465 if (ST_DEBUG
& DEBUG_FALLBACK
)
1466 debug_printf("%s: fallback processing\n", __FUNCTION__
);
1468 if (type
== GL_DEPTH
&& util_format_is_depth_and_stencil(pt
->format
))
1469 transfer_usage
= PIPE_TRANSFER_READ_WRITE
;
1471 transfer_usage
= PIPE_TRANSFER_WRITE
;
1473 ptTex
= pipe_get_transfer(st
->pipe
, pt
, 0, 0, transfer_usage
,
1474 0, 0, width
, height
);
1476 /* copy image from ptRead surface to ptTex surface */
1477 if (type
== GL_COLOR
) {
1478 /* alternate path using get/put_tile() */
1479 GLfloat
*buf
= (GLfloat
*) malloc(width
* height
* 4 * sizeof(GLfloat
));
1480 enum pipe_format readFormat
, drawFormat
;
1481 readFormat
= util_format_linear(rbRead
->texture
->format
);
1482 drawFormat
= util_format_linear(pt
->format
);
1483 pipe_get_tile_rgba_format(pipe
, ptRead
, 0, 0, readW
, readH
,
1485 pipe_put_tile_rgba_format(pipe
, ptTex
, pack
.SkipPixels
, pack
.SkipRows
,
1486 readW
, readH
, drawFormat
, buf
);
1491 GLuint
*buf
= (GLuint
*) malloc(width
* height
* sizeof(GLuint
));
1492 pipe_get_tile_z(pipe
, ptRead
, 0, 0, readW
, readH
, buf
);
1493 pipe_put_tile_z(pipe
, ptTex
, pack
.SkipPixels
, pack
.SkipRows
,
1498 pipe
->transfer_destroy(pipe
, ptRead
);
1499 pipe
->transfer_destroy(pipe
, ptTex
);
1502 /* OK, the texture 'pt' contains the src image/pixels. Now draw a
1503 * textured quad with that texture.
1505 draw_textured_quad(ctx
, dstx
, dsty
, ctx
->Current
.RasterPos
[2],
1506 width
, height
, ctx
->Pixel
.ZoomX
, ctx
->Pixel
.ZoomY
,
1511 color
, invertTex
, GL_FALSE
, GL_FALSE
);
1513 pipe_resource_reference(&pt
, NULL
);
1514 pipe_sampler_view_reference(&sv
[0], NULL
);
1519 void st_init_drawpixels_functions(struct dd_function_table
*functions
)
1521 functions
->DrawPixels
= st_DrawPixels
;
1522 functions
->CopyPixels
= st_CopyPixels
;
1527 st_destroy_drawpix(struct st_context
*st
)
1531 for (i
= 0; i
< Elements(st
->drawpix
.shaders
); i
++) {
1532 if (st
->drawpix
.shaders
[i
])
1533 _mesa_reference_fragprog(st
->ctx
, &st
->drawpix
.shaders
[i
], NULL
);
1536 st_reference_fragprog(st
, &st
->pixel_xfer
.combined_prog
, NULL
);
1537 if (st
->drawpix
.vert_shaders
[0])
1538 ureg_free_tokens(st
->drawpix
.vert_shaders
[0]);
1539 if (st
->drawpix
.vert_shaders
[1])
1540 ureg_free_tokens(st
->drawpix
.vert_shaders
[1]);
1543 #endif /* FEATURE_drawpix */