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(pipe->screen, PIPE_BIND_SAMPLER_VIEW,
495 format, type, unpack->SwapBytes);
497 if (pipeFormat != PIPE_FORMAT_NONE) {
498 mformat = st_pipe_format_to_mesa_format(pipeFormat);
499 baseInternalFormat = _mesa_get_format_base_format(mformat);
502 /* Use the generic approach. */
503 GLenum intFormat = internal_format(ctx, format, type);
505 baseInternalFormat = _mesa_base_tex_format(ctx, intFormat);
506 pipeFormat = st_choose_format(st, intFormat, format, type,
507 PIPE_TEXTURE_2D, 0, PIPE_BIND_SAMPLER_VIEW,
509 assert(pipeFormat != PIPE_FORMAT_NONE);
510 mformat = st_pipe_format_to_mesa_format(pipeFormat);
513 pixels = _mesa_map_pbo_source(ctx, unpack, pixels);
517 /* alloc temporary texture */
518 pt = alloc_texture(st, width, height, pipeFormat, PIPE_BIND_SAMPLER_VIEW);
520 _mesa_unmap_pbo_source(ctx, unpack);
525 struct pipe_transfer *transfer;
528 const GLbitfield imageTransferStateSave = ctx->_ImageTransferState;
530 /* we'll do pixel transfer in a fragment shader */
531 ctx->_ImageTransferState = 0x0;
533 /* map texture transfer */
534 dest = pipe_transfer_map(pipe, pt, 0, 0,
535 PIPE_TRANSFER_WRITE, 0, 0,
536 width, height, &transfer);
539 /* Put image into texture transfer.
540 * Note that the image is actually going to be upside down in
541 * the texture. We deal with that with texcoords.
543 success = _mesa_texstore(ctx, 2, /* dims */
544 baseInternalFormat, /* baseInternalFormat */
545 mformat, /* mesa_format */
546 transfer->stride, /* dstRowStride, bytes */
547 &dest, /* destSlices */
548 width, height, 1, /* size */
549 format, type, /* src format/type */
550 pixels, /* data source */
554 pipe_transfer_unmap(pipe, transfer);
559 ctx->_ImageTransferState = imageTransferStateSave;
562 _mesa_unmap_pbo_source(ctx, unpack);
569 * Draw quad with texcoords and optional color.
570 * Coords are gallium window coords with y=0=top.
571 * \param color may be null
572 * \param invertTex if true, flip texcoords vertically
575 draw_quad(struct gl_context *ctx, GLfloat x0, GLfloat y0, GLfloat z,
576 GLfloat x1, GLfloat y1, const GLfloat *color,
577 GLboolean invertTex, GLfloat maxXcoord, GLfloat maxYcoord)
579 struct st_context *st = st_context(ctx);
580 struct pipe_context *pipe = st->pipe;
581 GLfloat (*verts)[3][4]; /* four verts, three attribs, XYZW */
582 struct pipe_resource *buf = NULL;
585 if (u_upload_alloc(st->uploader, 0, 4 * sizeof(verts[0]), &offset,
586 &buf, (void **) &verts) != PIPE_OK) {
590 /* setup vertex data */
592 const struct gl_framebuffer *fb = st->ctx->DrawBuffer;
593 const GLfloat fb_width = (GLfloat) fb->Width;
594 const GLfloat fb_height = (GLfloat) fb->Height;
595 const GLfloat clip_x0 = x0 / fb_width * 2.0f - 1.0f;
596 const GLfloat clip_y0 = y0 / fb_height * 2.0f - 1.0f;
597 const GLfloat clip_x1 = x1 / fb_width * 2.0f - 1.0f;
598 const GLfloat clip_y1 = y1 / fb_height * 2.0f - 1.0f;
599 const GLfloat sLeft = 0.0f, sRight = maxXcoord;
600 const GLfloat tTop = invertTex ? maxYcoord : 0.0f;
601 const GLfloat tBot = invertTex ? 0.0f : maxYcoord;
605 verts[0][0][0] = clip_x0; /* v[0].attr[0].x */
606 verts[0][0][1] = clip_y0; /* v[0].attr[0].y */
609 verts[1][0][0] = clip_x1;
610 verts[1][0][1] = clip_y0;
613 verts[2][0][0] = clip_x1;
614 verts[2][0][1] = clip_y1;
617 verts[3][0][0] = clip_x0;
618 verts[3][0][1] = clip_y1;
620 verts[0][1][0] = sLeft; /* v[0].attr[1].S */
621 verts[0][1][1] = tTop; /* v[0].attr[1].T */
622 verts[1][1][0] = sRight;
623 verts[1][1][1] = tTop;
624 verts[2][1][0] = sRight;
625 verts[2][1][1] = tBot;
626 verts[3][1][0] = sLeft;
627 verts[3][1][1] = tBot;
629 /* same for all verts: */
631 for (i = 0; i < 4; i++) {
632 verts[i][0][2] = z; /* v[i].attr[0].z */
633 verts[i][0][3] = 1.0f; /* v[i].attr[0].w */
634 verts[i][2][0] = color[0]; /* v[i].attr[2].r */
635 verts[i][2][1] = color[1]; /* v[i].attr[2].g */
636 verts[i][2][2] = color[2]; /* v[i].attr[2].b */
637 verts[i][2][3] = color[3]; /* v[i].attr[2].a */
638 verts[i][1][2] = 0.0f; /* v[i].attr[1].R */
639 verts[i][1][3] = 1.0f; /* v[i].attr[1].Q */
643 for (i = 0; i < 4; i++) {
644 verts[i][0][2] = z; /*Z*/
645 verts[i][0][3] = 1.0f; /*W*/
646 verts[i][1][2] = 0.0f; /*R*/
647 verts[i][1][3] = 1.0f; /*Q*/
652 u_upload_unmap(st->uploader);
653 util_draw_vertex_buffer(pipe, st->cso_context, buf,
654 cso_get_aux_vertex_buffer_slot(st->cso_context),
658 3); /* attribs/vert */
659 pipe_resource_reference(&buf, NULL);
665 draw_textured_quad(struct gl_context *ctx, GLint x, GLint y, GLfloat z,
666 GLsizei width, GLsizei height,
667 GLfloat zoomX, GLfloat zoomY,
668 struct pipe_sampler_view **sv,
669 int num_sampler_view,
672 const GLfloat *color,
674 GLboolean write_depth, GLboolean write_stencil)
676 struct st_context *st = st_context(ctx);
677 struct pipe_context *pipe = st->pipe;
678 struct cso_context *cso = st->cso_context;
679 GLfloat x0, y0, x1, y1;
681 boolean normalized = sv[0]->texture->target != PIPE_TEXTURE_RECT;
684 /* XXX if DrawPixels image is larger than max texture size, break
687 maxSize = 1 << (pipe->screen->get_param(pipe->screen,
688 PIPE_CAP_MAX_TEXTURE_2D_LEVELS) - 1);
689 assert(width <= maxSize);
690 assert(height <= maxSize);
692 cso_save_rasterizer(cso);
693 cso_save_viewport(cso);
694 cso_save_samplers(cso, PIPE_SHADER_FRAGMENT);
695 cso_save_sampler_views(cso, PIPE_SHADER_FRAGMENT);
696 cso_save_fragment_shader(cso);
697 cso_save_stream_outputs(cso);
698 cso_save_vertex_shader(cso);
699 cso_save_geometry_shader(cso);
700 cso_save_vertex_elements(cso);
701 cso_save_aux_vertex_buffer_slot(cso);
703 cso_save_depth_stencil_alpha(cso);
707 /* rasterizer state: just scissor */
709 struct pipe_rasterizer_state rasterizer;
710 memset(&rasterizer, 0, sizeof(rasterizer));
711 rasterizer.clamp_fragment_color = !st->clamp_frag_color_in_shader &&
712 ctx->Color._ClampFragmentColor;
713 rasterizer.half_pixel_center = 1;
714 rasterizer.bottom_edge_rule = 1;
715 rasterizer.depth_clip = !ctx->Transform.DepthClamp;
716 rasterizer.scissor = ctx->Scissor.EnableFlags;
717 cso_set_rasterizer(cso, &rasterizer);
721 /* Stencil writing bypasses the normal fragment pipeline to
722 * disable color writing and set stencil test to always pass.
724 struct pipe_depth_stencil_alpha_state dsa;
725 struct pipe_blend_state blend;
728 memset(&dsa, 0, sizeof(dsa));
729 dsa.stencil[0].enabled = 1;
730 dsa.stencil[0].func = PIPE_FUNC_ALWAYS;
731 dsa.stencil[0].writemask = ctx->Stencil.WriteMask[0] & 0xff;
732 dsa.stencil[0].zpass_op = PIPE_STENCIL_OP_REPLACE;
734 /* writing depth+stencil: depth test always passes */
735 dsa.depth.enabled = 1;
736 dsa.depth.writemask = ctx->Depth.Mask;
737 dsa.depth.func = PIPE_FUNC_ALWAYS;
739 cso_set_depth_stencil_alpha(cso, &dsa);
741 /* blend (colormask) */
742 memset(&blend, 0, sizeof(blend));
743 cso_set_blend(cso, &blend);
746 /* fragment shader state: TEX lookup program */
747 cso_set_fragment_shader_handle(cso, driver_fp);
749 /* vertex shader state: position + texcoord pass-through */
750 cso_set_vertex_shader_handle(cso, driver_vp);
752 /* geometry shader state: disabled */
753 cso_set_geometry_shader_handle(cso, NULL);
755 /* texture sampling state: */
757 struct pipe_sampler_state sampler;
758 memset(&sampler, 0, sizeof(sampler));
759 sampler.wrap_s = PIPE_TEX_WRAP_CLAMP;
760 sampler.wrap_t = PIPE_TEX_WRAP_CLAMP;
761 sampler.wrap_r = PIPE_TEX_WRAP_CLAMP;
762 sampler.min_img_filter = PIPE_TEX_FILTER_NEAREST;
763 sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NONE;
764 sampler.mag_img_filter = PIPE_TEX_FILTER_NEAREST;
765 sampler.normalized_coords = normalized;
767 cso_single_sampler(cso, PIPE_SHADER_FRAGMENT, 0, &sampler);
768 if (num_sampler_view > 1) {
769 cso_single_sampler(cso, PIPE_SHADER_FRAGMENT, 1, &sampler);
771 cso_single_sampler_done(cso, PIPE_SHADER_FRAGMENT);
774 /* viewport state: viewport matching window dims */
776 const float w = (float) ctx->DrawBuffer->Width;
777 const float h = (float) ctx->DrawBuffer->Height;
778 struct pipe_viewport_state vp;
779 vp.scale[0] = 0.5f * w;
780 vp.scale[1] = -0.5f * h;
783 vp.translate[0] = 0.5f * w;
784 vp.translate[1] = 0.5f * h;
785 vp.translate[2] = 0.5f;
786 vp.translate[3] = 0.0f;
787 cso_set_viewport(cso, &vp);
790 cso_set_vertex_elements(cso, 3, st->velems_util_draw);
791 cso_set_stream_outputs(st->cso_context, 0, NULL, 0);
794 cso_set_sampler_views(cso, PIPE_SHADER_FRAGMENT, num_sampler_view, sv);
796 /* Compute Gallium window coords (y=0=top) with pixel zoom.
797 * Recall that these coords are transformed by the current
798 * vertex shader and viewport transformation.
800 if (st_fb_orientation(ctx->DrawBuffer) == Y_0_BOTTOM) {
801 y = ctx->DrawBuffer->Height - (int) (y + height * ctx->Pixel.ZoomY);
802 invertTex = !invertTex;
806 x1 = x + width * ctx->Pixel.ZoomX;
808 y1 = y + height * ctx->Pixel.ZoomY;
810 /* convert Z from [0,1] to [-1,-1] to match viewport Z scale/bias */
813 draw_quad(ctx, x0, y0, z, x1, y1, color, invertTex,
814 normalized ? ((GLfloat) width / sv[0]->texture->width0) : (GLfloat)width,
815 normalized ? ((GLfloat) height / sv[0]->texture->height0) : (GLfloat)height);
818 cso_restore_rasterizer(cso);
819 cso_restore_viewport(cso);
820 cso_restore_samplers(cso, PIPE_SHADER_FRAGMENT);
821 cso_restore_sampler_views(cso, PIPE_SHADER_FRAGMENT);
822 cso_restore_fragment_shader(cso);
823 cso_restore_vertex_shader(cso);
824 cso_restore_geometry_shader(cso);
825 cso_restore_vertex_elements(cso);
826 cso_restore_aux_vertex_buffer_slot(cso);
827 cso_restore_stream_outputs(cso);
829 cso_restore_depth_stencil_alpha(cso);
830 cso_restore_blend(cso);
836 * Software fallback to do glDrawPixels(GL_STENCIL_INDEX) when we
837 * can't use a fragment shader to write stencil values.
840 draw_stencil_pixels(struct gl_context *ctx, GLint x, GLint y,
841 GLsizei width, GLsizei height, GLenum format, GLenum type,
842 const struct gl_pixelstore_attrib *unpack,
843 const GLvoid *pixels)
845 struct st_context *st = st_context(ctx);
846 struct pipe_context *pipe = st->pipe;
847 struct st_renderbuffer *strb;
848 enum pipe_transfer_usage usage;
849 struct pipe_transfer *pt;
850 const GLboolean zoom = ctx->Pixel.ZoomX != 1.0 || ctx->Pixel.ZoomY != 1.0;
852 struct gl_pixelstore_attrib clippedUnpack = *unpack;
857 if (!_mesa_clip_drawpixels(ctx, &x, &y, &width, &height,
859 /* totally clipped */
864 strb = st_renderbuffer(ctx->DrawBuffer->
865 Attachment[BUFFER_STENCIL].Renderbuffer);
867 if (st_fb_orientation(ctx->DrawBuffer) == Y_0_TOP) {
868 y = ctx->DrawBuffer->Height - y - height;
871 if (format == GL_STENCIL_INDEX &&
872 _mesa_is_format_packed_depth_stencil(strb->Base.Format)) {
873 /* writing stencil to a combined depth+stencil buffer */
874 usage = PIPE_TRANSFER_READ_WRITE;
877 usage = PIPE_TRANSFER_WRITE;
880 stmap = pipe_transfer_map(pipe, strb->texture,
881 strb->surface->u.tex.level,
882 strb->surface->u.tex.first_layer,
886 pixels = _mesa_map_pbo_source(ctx, &clippedUnpack, pixels);
889 sValues = malloc(width * sizeof(GLubyte));
890 zValues = malloc(width * sizeof(GLuint));
892 if (sValues && zValues) {
894 for (row = 0; row < height; row++) {
895 GLfloat *zValuesFloat = (GLfloat*)zValues;
896 GLenum destType = GL_UNSIGNED_BYTE;
897 const GLvoid *source = _mesa_image_address2d(&clippedUnpack, pixels,
901 _mesa_unpack_stencil_span(ctx, width, destType, sValues,
902 type, source, &clippedUnpack,
903 ctx->_ImageTransferState);
905 if (format == GL_DEPTH_STENCIL) {
907 pt->resource->format == PIPE_FORMAT_Z32_FLOAT_S8X24_UINT ?
908 GL_FLOAT : GL_UNSIGNED_INT;
910 _mesa_unpack_depth_span(ctx, width, ztype, zValues,
911 (1 << 24) - 1, type, source,
916 _mesa_problem(ctx, "Gallium glDrawPixels(GL_STENCIL) with "
917 "zoom not complete");
923 if (st_fb_orientation(ctx->DrawBuffer) == Y_0_TOP) {
924 spanY = height - row - 1;
930 /* now pack the stencil (and Z) values in the dest format */
931 switch (pt->resource->format) {
932 case PIPE_FORMAT_S8_UINT:
934 ubyte *dest = stmap + spanY * pt->stride;
935 assert(usage == PIPE_TRANSFER_WRITE);
936 memcpy(dest, sValues, width);
939 case PIPE_FORMAT_Z24_UNORM_S8_UINT:
940 if (format == GL_DEPTH_STENCIL) {
941 uint *dest = (uint *) (stmap + spanY * pt->stride);
943 assert(usage == PIPE_TRANSFER_WRITE);
944 for (k = 0; k < width; k++) {
945 dest[k] = zValues[k] | (sValues[k] << 24);
949 uint *dest = (uint *) (stmap + spanY * pt->stride);
951 assert(usage == PIPE_TRANSFER_READ_WRITE);
952 for (k = 0; k < width; k++) {
953 dest[k] = (dest[k] & 0xffffff) | (sValues[k] << 24);
957 case PIPE_FORMAT_S8_UINT_Z24_UNORM:
958 if (format == GL_DEPTH_STENCIL) {
959 uint *dest = (uint *) (stmap + spanY * pt->stride);
961 assert(usage == PIPE_TRANSFER_WRITE);
962 for (k = 0; k < width; k++) {
963 dest[k] = (zValues[k] << 8) | (sValues[k] & 0xff);
967 uint *dest = (uint *) (stmap + spanY * pt->stride);
969 assert(usage == PIPE_TRANSFER_READ_WRITE);
970 for (k = 0; k < width; k++) {
971 dest[k] = (dest[k] & 0xffffff00) | (sValues[k] & 0xff);
975 case PIPE_FORMAT_Z32_FLOAT_S8X24_UINT:
976 if (format == GL_DEPTH_STENCIL) {
977 uint *dest = (uint *) (stmap + spanY * pt->stride);
978 GLfloat *destf = (GLfloat*)dest;
980 assert(usage == PIPE_TRANSFER_WRITE);
981 for (k = 0; k < width; k++) {
982 destf[k*2] = zValuesFloat[k];
983 dest[k*2+1] = sValues[k] & 0xff;
987 uint *dest = (uint *) (stmap + spanY * pt->stride);
989 assert(usage == PIPE_TRANSFER_READ_WRITE);
990 for (k = 0; k < width; k++) {
991 dest[k*2+1] = sValues[k] & 0xff;
1002 _mesa_error(ctx, GL_OUT_OF_MEMORY, "glDrawPixels()");
1008 _mesa_unmap_pbo_source(ctx, &clippedUnpack);
1010 /* unmap the stencil buffer */
1011 pipe_transfer_unmap(pipe, pt);
1016 * Get fragment program variant for a glDrawPixels or glCopyPixels
1017 * command for RGBA data.
1019 static struct st_fp_variant *
1020 get_color_fp_variant(struct st_context *st)
1022 struct gl_context *ctx = st->ctx;
1023 struct st_fp_variant_key key;
1024 struct st_fp_variant *fpv;
1026 memset(&key, 0, sizeof(key));
1030 key.scaleAndBias = (ctx->Pixel.RedBias != 0.0 ||
1031 ctx->Pixel.RedScale != 1.0 ||
1032 ctx->Pixel.GreenBias != 0.0 ||
1033 ctx->Pixel.GreenScale != 1.0 ||
1034 ctx->Pixel.BlueBias != 0.0 ||
1035 ctx->Pixel.BlueScale != 1.0 ||
1036 ctx->Pixel.AlphaBias != 0.0 ||
1037 ctx->Pixel.AlphaScale != 1.0);
1038 key.pixelMaps = ctx->Pixel.MapColorFlag;
1039 key.clamp_color = st->clamp_frag_color_in_shader &&
1040 st->ctx->Color._ClampFragmentColor;
1042 fpv = st_get_fp_variant(st, st->fp, &key);
1049 * Get fragment program variant for a glDrawPixels or glCopyPixels
1050 * command for depth/stencil data.
1052 static struct st_fp_variant *
1053 get_depth_stencil_fp_variant(struct st_context *st, GLboolean write_depth,
1054 GLboolean write_stencil)
1056 struct st_fp_variant_key key;
1057 struct st_fp_variant *fpv;
1059 memset(&key, 0, sizeof(key));
1063 key.drawpixels_z = write_depth;
1064 key.drawpixels_stencil = write_stencil;
1066 fpv = st_get_fp_variant(st, st->fp, &key);
1073 * Clamp glDrawPixels width and height to the maximum texture size.
1076 clamp_size(struct pipe_context *pipe, GLsizei *width, GLsizei *height,
1077 struct gl_pixelstore_attrib *unpack)
1080 1 << (pipe->screen->get_param(pipe->screen,
1081 PIPE_CAP_MAX_TEXTURE_2D_LEVELS) - 1);
1083 if (*width > maxSize) {
1084 if (unpack->RowLength == 0)
1085 unpack->RowLength = *width;
1088 if (*height > maxSize) {
1095 * Called via ctx->Driver.DrawPixels()
1098 st_DrawPixels(struct gl_context *ctx, GLint x, GLint y,
1099 GLsizei width, GLsizei height,
1100 GLenum format, GLenum type,
1101 const struct gl_pixelstore_attrib *unpack, const GLvoid *pixels)
1103 void *driver_vp, *driver_fp;
1104 struct st_context *st = st_context(ctx);
1105 const GLfloat *color;
1106 struct pipe_context *pipe = st->pipe;
1107 GLboolean write_stencil = GL_FALSE, write_depth = GL_FALSE;
1108 struct pipe_sampler_view *sv[2];
1109 int num_sampler_view = 1;
1110 struct st_fp_variant *fpv;
1111 struct gl_pixelstore_attrib clippedUnpack;
1113 /* Mesa state should be up to date by now */
1114 assert(ctx->NewState == 0x0);
1116 st_validate_state(st);
1118 /* Limit the size of the glDrawPixels to the max texture size.
1119 * Strictly speaking, that's not correct but since we don't handle
1120 * larger images yet, this is better than crashing.
1122 clippedUnpack = *unpack;
1123 unpack = &clippedUnpack;
1124 clamp_size(st->pipe, &width, &height, &clippedUnpack);
1126 if (format == GL_DEPTH_STENCIL)
1127 write_stencil = write_depth = GL_TRUE;
1128 else if (format == GL_STENCIL_INDEX)
1129 write_stencil = GL_TRUE;
1130 else if (format == GL_DEPTH_COMPONENT)
1131 write_depth = GL_TRUE;
1133 if (write_stencil &&
1134 !pipe->screen->get_param(pipe->screen, PIPE_CAP_SHADER_STENCIL_EXPORT)) {
1135 /* software fallback */
1136 draw_stencil_pixels(ctx, x, y, width, height, format, type,
1142 * Get vertex/fragment shaders
1144 if (write_depth || write_stencil) {
1145 fpv = get_depth_stencil_fp_variant(st, write_depth, write_stencil);
1147 driver_fp = fpv->driver_shader;
1149 driver_vp = make_passthrough_vertex_shader(st, GL_TRUE);
1151 color = ctx->Current.RasterColor;
1154 fpv = get_color_fp_variant(st);
1156 driver_fp = fpv->driver_shader;
1158 driver_vp = make_passthrough_vertex_shader(st, GL_FALSE);
1161 if (st->pixel_xfer.pixelmap_enabled) {
1162 sv[1] = st->pixel_xfer.pixelmap_sampler_view;
1167 /* update fragment program constants */
1168 st_upload_constants(st, fpv->parameters, PIPE_SHADER_FRAGMENT);
1170 /* draw with textured quad */
1172 struct pipe_resource *pt
1173 = make_texture(st, width, height, format, type, unpack, pixels);
1175 sv[0] = st_create_texture_sampler_view(st->pipe, pt);
1178 /* Create a second sampler view to read stencil.
1179 * The stencil is written using the shader stencil export
1181 if (write_stencil) {
1182 enum pipe_format stencil_format =
1183 util_format_stencil_only(pt->format);
1185 sv[1] = st_create_texture_sampler_view_format(st->pipe, pt,
1190 draw_textured_quad(ctx, x, y, ctx->Current.RasterPos[2],
1192 ctx->Pixel.ZoomX, ctx->Pixel.ZoomY,
1197 color, GL_FALSE, write_depth, write_stencil);
1198 pipe_sampler_view_reference(&sv[0], NULL);
1199 if (num_sampler_view > 1)
1200 pipe_sampler_view_reference(&sv[1], NULL);
1202 pipe_resource_reference(&pt, NULL);
1210 * Software fallback for glCopyPixels(GL_STENCIL).
1213 copy_stencil_pixels(struct gl_context *ctx, GLint srcx, GLint srcy,
1214 GLsizei width, GLsizei height,
1215 GLint dstx, GLint dsty)
1217 struct st_renderbuffer *rbDraw;
1218 struct pipe_context *pipe = st_context(ctx)->pipe;
1219 enum pipe_transfer_usage usage;
1220 struct pipe_transfer *ptDraw;
1225 buffer = malloc(width * height * sizeof(ubyte));
1227 _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyPixels(stencil)");
1231 /* Get the dest renderbuffer */
1232 rbDraw = st_renderbuffer(ctx->DrawBuffer->
1233 Attachment[BUFFER_STENCIL].Renderbuffer);
1235 /* this will do stencil pixel transfer ops */
1236 _mesa_readpixels(ctx, srcx, srcy, width, height,
1237 GL_STENCIL_INDEX, GL_UNSIGNED_BYTE,
1238 &ctx->DefaultPacking, buffer);
1241 /* debug code: dump stencil values */
1243 for (row = 0; row < height; row++) {
1244 printf("%3d: ", row);
1245 for (col = 0; col < width; col++) {
1246 printf("%02x ", buffer[col + row * width]);
1252 if (_mesa_is_format_packed_depth_stencil(rbDraw->Base.Format))
1253 usage = PIPE_TRANSFER_READ_WRITE;
1255 usage = PIPE_TRANSFER_WRITE;
1257 if (st_fb_orientation(ctx->DrawBuffer) == Y_0_TOP) {
1258 dsty = rbDraw->Base.Height - dsty - height;
1261 assert(util_format_get_blockwidth(rbDraw->texture->format) == 1);
1262 assert(util_format_get_blockheight(rbDraw->texture->format) == 1);
1264 /* map the stencil buffer */
1265 drawMap = pipe_transfer_map(pipe,
1267 rbDraw->surface->u.tex.level,
1268 rbDraw->surface->u.tex.first_layer,
1270 width, height, &ptDraw);
1273 /* XXX PixelZoom not handled yet */
1274 for (i = 0; i < height; i++) {
1281 if (st_fb_orientation(ctx->DrawBuffer) == Y_0_TOP) {
1285 dst = drawMap + y * ptDraw->stride;
1286 src = buffer + i * width;
1288 _mesa_pack_ubyte_stencil_row(rbDraw->Base.Format, width, src, dst);
1293 /* unmap the stencil buffer */
1294 pipe_transfer_unmap(pipe, ptDraw);
1299 * Return renderbuffer to use for reading color pixels for glCopyPixels
1301 static struct st_renderbuffer *
1302 st_get_color_read_renderbuffer(struct gl_context *ctx)
1304 struct gl_framebuffer *fb = ctx->ReadBuffer;
1305 struct st_renderbuffer *strb =
1306 st_renderbuffer(fb->_ColorReadBuffer);
1313 * \return TRUE if two regions overlap, FALSE otherwise
1316 regions_overlap(int srcX0, int srcY0,
1317 int srcX1, int srcY1,
1318 int dstX0, int dstY0,
1319 int dstX1, int dstY1)
1321 if (MAX2(srcX0, srcX1) < MIN2(dstX0, dstX1))
1322 return FALSE; /* src completely left of dst */
1324 if (MAX2(dstX0, dstX1) < MIN2(srcX0, srcX1))
1325 return FALSE; /* dst completely left of src */
1327 if (MAX2(srcY0, srcY1) < MIN2(dstY0, dstY1))
1328 return FALSE; /* src completely above dst */
1330 if (MAX2(dstY0, dstY1) < MIN2(srcY0, srcY1))
1331 return FALSE; /* dst completely above src */
1333 return TRUE; /* some overlap */
1338 * Try to do a glCopyPixels for simple cases with a blit by calling
1341 * We can do this when we're copying color pixels (depth/stencil
1342 * eventually) with no pixel zoom, no pixel transfer ops, no
1343 * per-fragment ops, and the src/dest regions don't overlap.
1346 blit_copy_pixels(struct gl_context *ctx, GLint srcx, GLint srcy,
1347 GLsizei width, GLsizei height,
1348 GLint dstx, GLint dsty, GLenum type)
1350 struct st_context *st = st_context(ctx);
1351 struct pipe_context *pipe = st->pipe;
1352 struct pipe_screen *screen = pipe->screen;
1353 struct gl_pixelstore_attrib pack, unpack;
1354 GLint readX, readY, readW, readH, drawX, drawY, drawW, drawH;
1356 if (type == GL_COLOR &&
1357 ctx->Pixel.ZoomX == 1.0 &&
1358 ctx->Pixel.ZoomY == 1.0 &&
1359 ctx->_ImageTransferState == 0x0 &&
1360 !ctx->Color.BlendEnabled &&
1361 !ctx->Color.AlphaEnabled &&
1363 !ctx->Fog.Enabled &&
1364 !ctx->Stencil.Enabled &&
1365 !ctx->FragmentProgram.Enabled &&
1366 !ctx->VertexProgram.Enabled &&
1367 !ctx->Shader.CurrentProgram[MESA_SHADER_FRAGMENT] &&
1368 ctx->DrawBuffer->_NumColorDrawBuffers == 1 &&
1369 !ctx->Query.CondRenderQuery &&
1370 !ctx->Query.CurrentOcclusionObject) {
1371 struct st_renderbuffer *rbRead, *rbDraw;
1374 * Clip the read region against the src buffer bounds.
1375 * We'll still allocate a temporary buffer/texture for the original
1376 * src region size but we'll only read the region which is on-screen.
1377 * This may mean that we draw garbage pixels into the dest region, but
1384 pack = ctx->DefaultPacking;
1385 if (!_mesa_clip_readpixels(ctx, &readX, &readY, &readW, &readH, &pack))
1386 return GL_TRUE; /* all done */
1388 /* clip against dest buffer bounds and scissor box */
1389 drawX = dstx + pack.SkipPixels;
1390 drawY = dsty + pack.SkipRows;
1392 if (!_mesa_clip_drawpixels(ctx, &drawX, &drawY, &readW, &readH, &unpack))
1393 return GL_TRUE; /* all done */
1395 readX = readX - pack.SkipPixels + unpack.SkipPixels;
1396 readY = readY - pack.SkipRows + unpack.SkipRows;
1401 rbRead = st_get_color_read_renderbuffer(ctx);
1402 rbDraw = st_renderbuffer(ctx->DrawBuffer->_ColorDrawBuffers[0]);
1404 /* Flip src/dst position depending on the orientation of buffers. */
1405 if (st_fb_orientation(ctx->ReadBuffer) == Y_0_TOP) {
1406 readY = rbRead->Base.Height - readY;
1410 if (st_fb_orientation(ctx->DrawBuffer) == Y_0_TOP) {
1411 /* We can't flip the destination for pipe->blit, so we only adjust
1412 * its position and flip the source.
1414 drawY = rbDraw->Base.Height - drawY - drawH;
1419 if (rbRead != rbDraw ||
1420 !regions_overlap(readX, readY, readX + readW, readY + readH,
1421 drawX, drawY, drawX + drawW, drawY + drawH)) {
1422 struct pipe_blit_info blit;
1424 memset(&blit, 0, sizeof(blit));
1425 blit.src.resource = rbRead->texture;
1426 blit.src.level = rbRead->surface->u.tex.level;
1427 blit.src.format = rbRead->texture->format;
1428 blit.src.box.x = readX;
1429 blit.src.box.y = readY;
1430 blit.src.box.z = rbRead->surface->u.tex.first_layer;
1431 blit.src.box.width = readW;
1432 blit.src.box.height = readH;
1433 blit.src.box.depth = 1;
1434 blit.dst.resource = rbDraw->texture;
1435 blit.dst.level = rbDraw->surface->u.tex.level;
1436 blit.dst.format = rbDraw->texture->format;
1437 blit.dst.box.x = drawX;
1438 blit.dst.box.y = drawY;
1439 blit.dst.box.z = rbDraw->surface->u.tex.first_layer;
1440 blit.dst.box.width = drawW;
1441 blit.dst.box.height = drawH;
1442 blit.dst.box.depth = 1;
1443 blit.mask = PIPE_MASK_RGBA;
1444 blit.filter = PIPE_TEX_FILTER_NEAREST;
1446 if (screen->is_format_supported(screen, blit.src.format,
1447 blit.src.resource->target,
1448 blit.src.resource->nr_samples,
1449 PIPE_BIND_SAMPLER_VIEW) &&
1450 screen->is_format_supported(screen, blit.dst.format,
1451 blit.dst.resource->target,
1452 blit.dst.resource->nr_samples,
1453 PIPE_BIND_RENDER_TARGET)) {
1454 pipe->blit(pipe, &blit);
1465 st_CopyPixels(struct gl_context *ctx, GLint srcx, GLint srcy,
1466 GLsizei width, GLsizei height,
1467 GLint dstx, GLint dsty, GLenum type)
1469 struct st_context *st = st_context(ctx);
1470 struct pipe_context *pipe = st->pipe;
1471 struct pipe_screen *screen = pipe->screen;
1472 struct st_renderbuffer *rbRead;
1473 void *driver_vp, *driver_fp;
1474 struct pipe_resource *pt;
1475 struct pipe_sampler_view *sv[2];
1476 int num_sampler_view = 1;
1478 enum pipe_format srcFormat;
1480 GLboolean invertTex = GL_FALSE;
1481 GLint readX, readY, readW, readH;
1482 struct gl_pixelstore_attrib pack = ctx->DefaultPacking;
1483 struct st_fp_variant *fpv;
1485 st_validate_state(st);
1487 if (type == GL_DEPTH_STENCIL) {
1488 /* XXX make this more efficient */
1489 st_CopyPixels(ctx, srcx, srcy, width, height, dstx, dsty, GL_STENCIL);
1490 st_CopyPixels(ctx, srcx, srcy, width, height, dstx, dsty, GL_DEPTH);
1494 if (type == GL_STENCIL) {
1495 /* can't use texturing to do stencil */
1496 copy_stencil_pixels(ctx, srcx, srcy, width, height, dstx, dsty);
1500 if (blit_copy_pixels(ctx, srcx, srcy, width, height, dstx, dsty, type))
1504 * The subsequent code implements glCopyPixels by copying the source
1505 * pixels into a temporary texture that's then applied to a textured quad.
1506 * When we draw the textured quad, all the usual per-fragment operations
1512 * Get vertex/fragment shaders
1514 if (type == GL_COLOR) {
1515 rbRead = st_get_color_read_renderbuffer(ctx);
1518 fpv = get_color_fp_variant(st);
1519 driver_fp = fpv->driver_shader;
1521 driver_vp = make_passthrough_vertex_shader(st, GL_FALSE);
1523 if (st->pixel_xfer.pixelmap_enabled) {
1524 sv[1] = st->pixel_xfer.pixelmap_sampler_view;
1529 assert(type == GL_DEPTH);
1530 rbRead = st_renderbuffer(ctx->ReadBuffer->
1531 Attachment[BUFFER_DEPTH].Renderbuffer);
1532 color = ctx->Current.Attrib[VERT_ATTRIB_COLOR0];
1534 fpv = get_depth_stencil_fp_variant(st, GL_TRUE, GL_FALSE);
1535 driver_fp = fpv->driver_shader;
1537 driver_vp = make_passthrough_vertex_shader(st, GL_TRUE);
1540 /* update fragment program constants */
1541 st_upload_constants(st, fpv->parameters, PIPE_SHADER_FRAGMENT);
1543 /* Choose the format for the temporary texture. */
1544 srcFormat = rbRead->texture->format;
1545 srcBind = PIPE_BIND_SAMPLER_VIEW |
1546 (type == GL_COLOR ? PIPE_BIND_RENDER_TARGET : PIPE_BIND_DEPTH_STENCIL);
1548 if (!screen->is_format_supported(screen, srcFormat, st->internal_target, 0,
1550 /* srcFormat is non-renderable. Find a compatible renderable format. */
1551 if (type == GL_DEPTH) {
1552 srcFormat = st_choose_format(st, GL_DEPTH_COMPONENT, GL_NONE,
1553 GL_NONE, st->internal_target, 0,
1557 assert(type == GL_COLOR);
1559 if (util_format_is_float(srcFormat)) {
1560 srcFormat = st_choose_format(st, GL_RGBA32F, GL_NONE,
1561 GL_NONE, st->internal_target, 0,
1564 else if (util_format_is_pure_sint(srcFormat)) {
1565 srcFormat = st_choose_format(st, GL_RGBA32I, GL_NONE,
1566 GL_NONE, st->internal_target, 0,
1569 else if (util_format_is_pure_uint(srcFormat)) {
1570 srcFormat = st_choose_format(st, GL_RGBA32UI, GL_NONE,
1571 GL_NONE, st->internal_target, 0,
1574 else if (util_format_is_snorm(srcFormat)) {
1575 srcFormat = st_choose_format(st, GL_RGBA16_SNORM, GL_NONE,
1576 GL_NONE, st->internal_target, 0,
1580 srcFormat = st_choose_format(st, GL_RGBA, GL_NONE,
1581 GL_NONE, st->internal_target, 0,
1586 if (srcFormat == PIPE_FORMAT_NONE) {
1587 assert(0 && "cannot choose a format for src of CopyPixels");
1592 /* Invert src region if needed */
1593 if (st_fb_orientation(ctx->ReadBuffer) == Y_0_TOP) {
1594 srcy = ctx->ReadBuffer->Height - srcy - height;
1595 invertTex = !invertTex;
1598 /* Clip the read region against the src buffer bounds.
1599 * We'll still allocate a temporary buffer/texture for the original
1600 * src region size but we'll only read the region which is on-screen.
1601 * This may mean that we draw garbage pixels into the dest region, but
1608 if (!_mesa_clip_readpixels(ctx, &readX, &readY, &readW, &readH, &pack)) {
1609 /* The source region is completely out of bounds. Do nothing.
1610 * The GL spec says "Results of copies from outside the window,
1611 * or from regions of the window that are not exposed, are
1612 * hardware dependent and undefined."
1617 readW = MAX2(0, readW);
1618 readH = MAX2(0, readH);
1620 /* Allocate the temporary texture. */
1621 pt = alloc_texture(st, width, height, srcFormat, srcBind);
1625 sv[0] = st_create_texture_sampler_view(st->pipe, pt);
1627 pipe_resource_reference(&pt, NULL);
1631 /* Copy the src region to the temporary texture. */
1633 struct pipe_blit_info blit;
1635 memset(&blit, 0, sizeof(blit));
1636 blit.src.resource = rbRead->texture;
1637 blit.src.level = rbRead->surface->u.tex.level;
1638 blit.src.format = rbRead->texture->format;
1639 blit.src.box.x = readX;
1640 blit.src.box.y = readY;
1641 blit.src.box.z = rbRead->surface->u.tex.first_layer;
1642 blit.src.box.width = readW;
1643 blit.src.box.height = readH;
1644 blit.src.box.depth = 1;
1645 blit.dst.resource = pt;
1647 blit.dst.format = pt->format;
1648 blit.dst.box.x = pack.SkipPixels;
1649 blit.dst.box.y = pack.SkipRows;
1651 blit.dst.box.width = readW;
1652 blit.dst.box.height = readH;
1653 blit.dst.box.depth = 1;
1654 blit.mask = util_format_get_mask(pt->format) & ~PIPE_MASK_S;
1655 blit.filter = PIPE_TEX_FILTER_NEAREST;
1657 pipe->blit(pipe, &blit);
1660 /* OK, the texture 'pt' contains the src image/pixels. Now draw a
1661 * textured quad with that texture.
1663 draw_textured_quad(ctx, dstx, dsty, ctx->Current.RasterPos[2],
1664 width, height, ctx->Pixel.ZoomX, ctx->Pixel.ZoomY,
1669 color, invertTex, GL_FALSE, GL_FALSE);
1671 pipe_resource_reference(&pt, NULL);
1672 pipe_sampler_view_reference(&sv[0], NULL);
1677 void st_init_drawpixels_functions(struct dd_function_table *functions)
1679 functions->DrawPixels = st_DrawPixels;
1680 functions->CopyPixels = st_CopyPixels;
1685 st_destroy_drawpix(struct st_context *st)
1689 for (i = 0; i < Elements(st->drawpix.shaders); i++) {
1690 if (st->drawpix.shaders[i])
1691 _mesa_reference_fragprog(st->ctx, &st->drawpix.shaders[i], NULL);
1694 st_reference_fragprog(st, &st->pixel_xfer.combined_prog, NULL);
1695 if (st->drawpix.vert_shaders[0])
1696 cso_delete_vertex_shader(st->cso_context, st->drawpix.vert_shaders[0]);
1697 if (st->drawpix.vert_shaders[1])
1698 cso_delete_vertex_shader(st->cso_context, st->drawpix.vert_shaders[1]);