diff options
Diffstat (limited to 'src/mesa/state_tracker/st_cb_drawpixels.c')
| -rw-r--r-- | src/mesa/state_tracker/st_cb_drawpixels.c | 1104 |
1 files changed, 1104 insertions, 0 deletions
diff --git a/src/mesa/state_tracker/st_cb_drawpixels.c b/src/mesa/state_tracker/st_cb_drawpixels.c new file mode 100644 index 0000000000..32bf21411d --- /dev/null +++ b/src/mesa/state_tracker/st_cb_drawpixels.c @@ -0,0 +1,1104 @@ +/************************************************************************** + * + * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas. + * All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the + * "Software"), to deal in the Software without restriction, including + * without limitation the rights to use, copy, modify, merge, publish, + * distribute, sub license, and/or sell copies of the Software, and to + * permit persons to whom the Software is furnished to do so, subject to + * the following conditions: + * + * The above copyright notice and this permission notice (including the + * next paragraph) shall be included in all copies or substantial portions + * of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS + * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. + * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR + * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, + * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE + * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + * + **************************************************************************/ + + /* + * Authors: + * Brian Paul + */ + +#include "main/imports.h" +#include "main/image.h" +#include "main/bufferobj.h" +#include "main/macros.h" +#include "main/texformat.h" +#include "main/state.h" +#include "shader/program.h" +#include "shader/prog_parameter.h" +#include "shader/prog_print.h" + +#include "st_context.h" +#include "st_atom.h" +#include "st_atom_constbuf.h" +#include "st_draw.h" +#include "st_program.h" +#include "st_cb_drawpixels.h" +#include "st_cb_readpixels.h" +#include "st_cb_fbo.h" +#include "st_cb_texture.h" +#include "st_draw.h" +#include "st_format.h" +#include "st_mesa_to_tgsi.h" +#include "st_texture.h" +#include "pipe/p_context.h" +#include "pipe/p_defines.h" +#include "pipe/p_inlines.h" +#include "util/u_tile.h" +#include "util/u_draw_quad.h" +#include "shader/prog_instruction.h" +#include "cso_cache/cso_context.h" + + +/** + * Check if the given program is: + * 0: MOVE result.color, fragment.color; + * 1: END; + */ +static GLboolean +is_passthrough_program(const struct gl_fragment_program *prog) +{ + if (prog->Base.NumInstructions == 2) { + const struct prog_instruction *inst = prog->Base.Instructions; + if (inst[0].Opcode == OPCODE_MOV && + inst[1].Opcode == OPCODE_END && + inst[0].DstReg.File == PROGRAM_OUTPUT && + inst[0].DstReg.Index == FRAG_RESULT_COLR && + inst[0].DstReg.WriteMask == WRITEMASK_XYZW && + inst[0].SrcReg[0].File == PROGRAM_INPUT && + inst[0].SrcReg[0].Index == FRAG_ATTRIB_COL0 && + inst[0].SrcReg[0].Swizzle == SWIZZLE_XYZW) { + return GL_TRUE; + } + } + return GL_FALSE; +} + + + +/** + * Make fragment shader for glDraw/CopyPixels. This shader is made + * by combining the pixel transfer shader with the user-defined shader. + */ +static struct st_fragment_program * +combined_drawpix_fragment_program(GLcontext *ctx) +{ + struct st_context *st = ctx->st; + struct st_fragment_program *stfp; + + if (st->pixel_xfer.program->serialNo == st->pixel_xfer.xfer_prog_sn + && st->fp->serialNo == st->pixel_xfer.user_prog_sn) { + /* the pixel tranfer program has not changed and the user-defined + * program has not changed, so re-use the combined program. + */ + stfp = st->pixel_xfer.combined_prog; + } + else { + /* Concatenate the pixel transfer program with the current user- + * defined program. + */ + if (is_passthrough_program(&st->fp->Base)) { + stfp = (struct st_fragment_program *) + _mesa_clone_program(ctx, &st->pixel_xfer.program->Base.Base); + } + else { +#if 0 + printf("Base program:\n"); + _mesa_print_program(&st->fp->Base.Base); + printf("DrawPix program:\n"); + _mesa_print_program(&st->pixel_xfer.program->Base.Base); +#endif + stfp = (struct st_fragment_program *) + _mesa_combine_programs(ctx, + &st->pixel_xfer.program->Base.Base, + &st->fp->Base.Base); + } + +#if 0 + { + struct gl_program *p = &stfp->Base.Base; + printf("Combined DrawPixels program:\n"); + _mesa_print_program(p); + printf("InputsRead: 0x%x\n", p->InputsRead); + printf("OutputsWritten: 0x%x\n", p->OutputsWritten); + _mesa_print_parameter_list(p->Parameters); + } +#endif + + /* translate to TGSI tokens */ + st_translate_fragment_program(st, stfp, NULL); + + /* save new program, update serial numbers */ + st->pixel_xfer.xfer_prog_sn = st->pixel_xfer.program->serialNo; + st->pixel_xfer.user_prog_sn = st->fp->serialNo; + st->pixel_xfer.combined_prog_sn = stfp->serialNo; + st->pixel_xfer.combined_prog = stfp; + } + + /* Ideally we'd have updated the pipe constants during the normal + * st/atom mechanism. But we can't since this is specific to glDrawPixels. + */ + st_upload_constants(st, stfp->Base.Base.Parameters, PIPE_SHADER_FRAGMENT); + + return stfp; +} + + +/** + * Create fragment shader that does a TEX() instruction to get a Z + * value, then writes to FRAG_RESULT_DEPR. + * Pass fragment color through as-is. + */ +static struct st_fragment_program * +make_fragment_shader_z(struct st_context *st) +{ + GLcontext *ctx = st->ctx; + struct gl_program *p; + GLuint ic = 0; + + if (st->drawpix.z_shader) { + return st->drawpix.z_shader; + } + + /* + * Create shader now + */ + p = ctx->Driver.NewProgram(ctx, GL_FRAGMENT_PROGRAM_ARB, 0); + if (!p) + return NULL; + + p->NumInstructions = 3; + + p->Instructions = _mesa_alloc_instructions(p->NumInstructions); + if (!p->Instructions) { + ctx->Driver.DeleteProgram(ctx, p); + return NULL; + } + _mesa_init_instructions(p->Instructions, p->NumInstructions); + + /* TEX result.depth, fragment.texcoord[0], texture[0], 2D; */ + p->Instructions[ic].Opcode = OPCODE_TEX; + p->Instructions[ic].DstReg.File = PROGRAM_OUTPUT; + p->Instructions[ic].DstReg.Index = FRAG_RESULT_DEPR; + p->Instructions[ic].DstReg.WriteMask = WRITEMASK_Z; + p->Instructions[ic].SrcReg[0].File = PROGRAM_INPUT; + p->Instructions[ic].SrcReg[0].Index = FRAG_ATTRIB_TEX0; + p->Instructions[ic].TexSrcUnit = 0; + p->Instructions[ic].TexSrcTarget = TEXTURE_2D_INDEX; + ic++; + + /* MOV result.color, fragment.color */ + p->Instructions[ic].Opcode = OPCODE_MOV; + p->Instructions[ic].DstReg.File = PROGRAM_OUTPUT; + p->Instructions[ic].DstReg.Index = FRAG_RESULT_COLR; + p->Instructions[ic].SrcReg[0].File = PROGRAM_INPUT; + p->Instructions[ic].SrcReg[0].Index = FRAG_ATTRIB_COL0; + ic++; + + /* END; */ + p->Instructions[ic++].Opcode = OPCODE_END; + + assert(ic == p->NumInstructions); + + p->InputsRead = FRAG_BIT_TEX0 | FRAG_BIT_COL0; + p->OutputsWritten = (1 << FRAG_RESULT_COLR) | (1 << FRAG_RESULT_DEPR); + p->SamplersUsed = 0x1; /* sampler 0 (bit 0) is used */ + + st->drawpix.z_shader = (struct st_fragment_program *) p; + st_translate_fragment_program(st, st->drawpix.z_shader, NULL); + + return st->drawpix.z_shader; +} + + + +/** + * Create a simple vertex shader that just passes through the + * vertex position and texcoord (and optionally, color). + */ +static struct st_vertex_program * +st_make_passthrough_vertex_shader(struct st_context *st, GLboolean passColor) +{ + GLcontext *ctx = st->ctx; + struct st_vertex_program *stvp; + struct gl_program *p; + GLuint ic = 0; + + if (st->drawpix.vert_shaders[passColor]) + return st->drawpix.vert_shaders[passColor]; + + /* + * Create shader now + */ + p = ctx->Driver.NewProgram(ctx, GL_VERTEX_PROGRAM_ARB, 0); + if (!p) + return NULL; + + if (passColor) + p->NumInstructions = 4; + else + p->NumInstructions = 3; + + p->Instructions = _mesa_alloc_instructions(p->NumInstructions); + if (!p->Instructions) { + ctx->Driver.DeleteProgram(ctx, p); + return NULL; + } + _mesa_init_instructions(p->Instructions, p->NumInstructions); + /* MOV result.pos, vertex.pos; */ + p->Instructions[0].Opcode = OPCODE_MOV; + p->Instructions[0].DstReg.File = PROGRAM_OUTPUT; + p->Instructions[0].DstReg.Index = VERT_RESULT_HPOS; + p->Instructions[0].SrcReg[0].File = PROGRAM_INPUT; + p->Instructions[0].SrcReg[0].Index = VERT_ATTRIB_POS; + /* MOV result.texcoord0, vertex.texcoord0; */ + p->Instructions[1].Opcode = OPCODE_MOV; + p->Instructions[1].DstReg.File = PROGRAM_OUTPUT; + p->Instructions[1].DstReg.Index = VERT_RESULT_TEX0; + p->Instructions[1].SrcReg[0].File = PROGRAM_INPUT; + p->Instructions[1].SrcReg[0].Index = VERT_ATTRIB_TEX0; + ic = 2; + if (passColor) { + /* MOV result.color0, vertex.color0; */ + p->Instructions[ic].Opcode = OPCODE_MOV; + p->Instructions[ic].DstReg.File = PROGRAM_OUTPUT; + p->Instructions[ic].DstReg.Index = VERT_RESULT_COL0; + p->Instructions[ic].SrcReg[0].File = PROGRAM_INPUT; + p->Instructions[ic].SrcReg[0].Index = VERT_ATTRIB_COLOR0; + ic++; + } + + /* END; */ + p->Instructions[ic].Opcode = OPCODE_END; + ic++; + + assert(ic == p->NumInstructions); + + p->InputsRead = VERT_BIT_POS | VERT_BIT_TEX0; + p->OutputsWritten = ((1 << VERT_RESULT_TEX0) | + (1 << VERT_RESULT_HPOS)); + if (passColor) { + p->InputsRead |= VERT_BIT_COLOR0; + p->OutputsWritten |= (1 << VERT_RESULT_COL0); + } + + stvp = (struct st_vertex_program *) p; + st_translate_vertex_program(st, stvp, NULL, NULL, NULL); + + st->drawpix.vert_shaders[passColor] = stvp; + + return stvp; +} + + +static GLenum +_mesa_base_format(GLenum format) +{ + switch (format) { + case GL_DEPTH_COMPONENT: + return GL_DEPTH_COMPONENT; + case GL_STENCIL_INDEX: + return GL_STENCIL_INDEX; + default: + return GL_RGBA; + } +} + + +/** + * Make texture containing an image for glDrawPixels image. + * If 'pixels' is NULL, leave the texture image data undefined. + */ +static struct pipe_texture * +make_texture(struct st_context *st, + GLsizei width, GLsizei height, GLenum format, GLenum type, + const struct gl_pixelstore_attrib *unpack, + const GLvoid *pixels) +{ + GLcontext *ctx = st->ctx; + struct pipe_context *pipe = st->pipe; + struct pipe_screen *screen = pipe->screen; + const struct gl_texture_format *mformat; + struct pipe_texture *pt; + enum pipe_format pipeFormat; + GLuint cpp; + GLenum baseFormat; + + baseFormat = _mesa_base_format(format); + + mformat = st_ChooseTextureFormat(ctx, baseFormat, format, type); + assert(mformat); + + pipeFormat = st_mesa_format_to_pipe_format(mformat->MesaFormat); + assert(pipeFormat); + cpp = st_sizeof_format(pipeFormat); + + pixels = _mesa_map_drawpix_pbo(ctx, unpack, pixels); + if (!pixels) + return NULL; + + pt = st_texture_create(st, PIPE_TEXTURE_2D, pipeFormat, 0, width, height, + 1, 0, + PIPE_TEXTURE_USAGE_SAMPLER); + if (!pt) { + _mesa_unmap_drawpix_pbo(ctx, unpack); + return NULL; + } + + { + struct pipe_surface *surface; + static const GLuint dstImageOffsets = 0; + GLboolean success; + GLubyte *dest; + const GLbitfield imageTransferStateSave = ctx->_ImageTransferState; + + /* we'll do pixel transfer in a fragment shader */ + ctx->_ImageTransferState = 0x0; + + surface = screen->get_tex_surface(screen, pt, 0, 0, 0, + PIPE_BUFFER_USAGE_CPU_WRITE); + + /* map texture surface */ + dest = screen->surface_map(screen, surface, + PIPE_BUFFER_USAGE_CPU_WRITE); + + /* Put image into texture surface. + * Note that the image is actually going to be upside down in + * the texture. We deal with that with texcoords. + */ + success = mformat->StoreImage(ctx, 2, /* dims */ + baseFormat, /* baseInternalFormat */ + mformat, /* gl_texture_format */ + dest, /* dest */ + 0, 0, 0, /* dstX/Y/Zoffset */ + surface->stride, /* dstRowStride, bytes */ + &dstImageOffsets, /* dstImageOffsets */ + width, height, 1, /* size */ + format, type, /* src format/type */ + pixels, /* data source */ + unpack); + + /* unmap */ + screen->surface_unmap(screen, surface); + pipe_surface_reference(&surface, NULL); + + assert(success); + + /* restore */ + ctx->_ImageTransferState = imageTransferStateSave; + } + + _mesa_unmap_drawpix_pbo(ctx, unpack); + + return pt; +} + + +/** + * Draw quad with texcoords and optional color. + * Coords are window coords with y=0=bottom. + * \param color may be null + * \param invertTex if true, flip texcoords vertically + */ +static void +draw_quad(GLcontext *ctx, GLfloat x0, GLfloat y0, GLfloat z, + GLfloat x1, GLfloat y1, const GLfloat *color, + GLboolean invertTex) +{ + struct st_context *st = ctx->st; + struct pipe_context *pipe = ctx->st->pipe; + GLfloat verts[4][3][4]; /* four verts, three attribs, XYZW */ + + /* setup vertex data */ + { + const struct gl_framebuffer *fb = st->ctx->DrawBuffer; + const GLfloat fb_width = (GLfloat) fb->Width; + const GLfloat fb_height = (GLfloat) fb->Height; + const GLfloat clip_x0 = x0 / fb_width * 2.0f - 1.0f; + const GLfloat clip_y0 = y0 / fb_height * 2.0f - 1.0f; + const GLfloat clip_x1 = x1 / fb_width * 2.0f - 1.0f; + const GLfloat clip_y1 = y1 / fb_height * 2.0f - 1.0f; + const GLfloat sLeft = 0.0f, sRight = 1.0f; + const GLfloat tTop = invertTex, tBot = 1.0f - tTop; + GLuint tex, i; + + /* upper-left */ + verts[0][0][0] = clip_x0; /* v[0].attr[0].x */ + verts[0][0][1] = clip_y0; /* v[0].attr[0].y */ + + /* upper-right */ + verts[1][0][0] = clip_x1; + verts[1][0][1] = clip_y0; + + /* lower-right */ + verts[2][0][0] = clip_x1; + verts[2][0][1] = clip_y1; + + /* lower-left */ + verts[3][0][0] = clip_x0; + verts[3][0][1] = clip_y1; + + tex = color ? 2 : 1; + verts[0][tex][0] = sLeft; /* v[0].attr[tex].s */ + verts[0][tex][1] = tTop; /* v[0].attr[tex].t */ + verts[1][tex][0] = sRight; + verts[1][tex][1] = tTop; + verts[2][tex][0] = sRight; + verts[2][tex][1] = tBot; + verts[3][tex][0] = sLeft; + verts[3][tex][1] = tBot; + + /* same for all verts: */ + if (color) { + for (i = 0; i < 4; i++) { + verts[i][0][2] = z; /*Z*/ + verts[i][0][3] = 1.0f; /*W*/ + verts[i][1][0] = color[0]; + verts[i][1][1] = color[1]; + verts[i][1][2] = color[2]; + verts[i][1][3] = color[3]; + verts[i][2][2] = 0.0f; /*R*/ + verts[i][2][3] = 1.0f; /*Q*/ + } + } + else { + for (i = 0; i < 4; i++) { + verts[i][0][2] = z; /*Z*/ + verts[i][0][3] = 1.0f; /*W*/ + verts[i][1][2] = 0.0f; /*R*/ + verts[i][1][3] = 1.0f; /*Q*/ + } + } + } + + { + struct pipe_buffer *buf; + ubyte *map; + + /* allocate/load buffer object with vertex data */ + buf = pipe_buffer_create(pipe->screen, 32, PIPE_BUFFER_USAGE_VERTEX, + sizeof(verts)); + map = pipe_buffer_map(pipe->screen, buf, PIPE_BUFFER_USAGE_CPU_WRITE); + memcpy(map, verts, sizeof(verts)); + pipe_buffer_unmap(pipe->screen, buf); + + util_draw_vertex_buffer(pipe, buf, 0, + PIPE_PRIM_QUADS, + 4, /* verts */ + 3); /* attribs/vert */ + pipe_buffer_reference(pipe->screen, &buf, NULL); + } +} + + + +static void +draw_textured_quad(GLcontext *ctx, GLint x, GLint y, GLfloat z, + GLsizei width, GLsizei height, + GLfloat zoomX, GLfloat zoomY, + struct pipe_texture *pt, + struct st_vertex_program *stvp, + struct st_fragment_program *stfp, + const GLfloat *color, + GLboolean invertTex) +{ + struct st_context *st = ctx->st; + struct pipe_context *pipe = ctx->st->pipe; + struct cso_context *cso = ctx->st->cso_context; + GLfloat x0, y0, x1, y1; + GLsizei maxSize; + + /* limit checks */ + /* XXX if DrawPixels image is larger than max texture size, break + * it up into chunks. + */ + maxSize = 1 << (pipe->screen->get_param(pipe->screen, PIPE_CAP_MAX_TEXTURE_2D_LEVELS) - 1); + assert(width <= maxSize); + assert(height <= maxSize); + + cso_save_rasterizer(cso); + cso_save_viewport(cso); + cso_save_samplers(cso); + cso_save_sampler_textures(cso); + cso_save_fragment_shader(cso); + cso_save_vertex_shader(cso); + + /* rasterizer state: just scissor */ + { + struct pipe_rasterizer_state rasterizer; + memset(&rasterizer, 0, sizeof(rasterizer)); + rasterizer.gl_rasterization_rules = 1; + rasterizer.scissor = ctx->Scissor.Enabled; + cso_set_rasterizer(cso, &rasterizer); + } + + /* fragment shader state: TEX lookup program */ + cso_set_fragment_shader_handle(cso, stfp->driver_shader); + + /* vertex shader state: position + texcoord pass-through */ + cso_set_vertex_shader_handle(cso, stvp->driver_shader); + + + /* texture sampling state: */ + { + struct pipe_sampler_state sampler; + memset(&sampler, 0, sizeof(sampler)); + sampler.wrap_s = PIPE_TEX_WRAP_CLAMP; + sampler.wrap_t = PIPE_TEX_WRAP_CLAMP; + sampler.wrap_r = PIPE_TEX_WRAP_CLAMP; + sampler.min_img_filter = PIPE_TEX_FILTER_NEAREST; + sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NONE; + sampler.mag_img_filter = PIPE_TEX_FILTER_NEAREST; + sampler.normalized_coords = 1; + + cso_single_sampler(cso, 0, &sampler); + if (st->pixel_xfer.pixelmap_enabled) { + cso_single_sampler(cso, 1, &sampler); + } + cso_single_sampler_done(cso); + } + + /* viewport state: viewport matching window dims */ + { + const float width = (float) ctx->DrawBuffer->Width; + const float height = (float) ctx->DrawBuffer->Height; + struct pipe_viewport_state vp; + vp.scale[0] = 0.5f * width; + vp.scale[1] = -0.5f * height; + vp.scale[2] = 1.0f; + vp.scale[3] = 1.0f; + vp.translate[0] = 0.5f * width; + vp.translate[1] = 0.5f * height; + vp.translate[2] = 0.0f; + vp.translate[3] = 0.0f; + cso_set_viewport(cso, &vp); + } + + /* texture state: */ + if (st->pixel_xfer.pixelmap_enabled) { + struct pipe_texture *textures[2]; + textures[0] = pt; + textures[1] = st->pixel_xfer.pixelmap_texture; + pipe->set_sampler_textures(pipe, 2, textures); + } + else { + pipe->set_sampler_textures(pipe, 1, &pt); + } + + /* Compute window coords (y=0=bottom) with pixel zoom. + * Recall that these coords are transformed by the current + * vertex shader and viewport transformation. + */ + x0 = (GLfloat) x; + x1 = x + width * ctx->Pixel.ZoomX; + y0 = (GLfloat) y; + y1 = y + height * ctx->Pixel.ZoomY; + //if(!color) + draw_quad(ctx, x0, y0, z, x1, y1, color, invertTex); + //else + //printf("skip draw quad\n"); + /* restore state */ + cso_restore_rasterizer(cso); + cso_restore_viewport(cso); + cso_restore_samplers(cso); + cso_restore_sampler_textures(cso); + cso_restore_fragment_shader(cso); + cso_restore_vertex_shader(cso); +} + + +/** + * Check if a GL format/type combination is a match to the given pipe format. + * XXX probably move this to a re-usable place. + */ +static GLboolean +compatible_formats(GLenum format, GLenum type, enum pipe_format pipeFormat) +{ + static const GLuint one = 1; + GLubyte littleEndian = *((GLubyte *) &one); + + if (pipeFormat == PIPE_FORMAT_R8G8B8A8_UNORM && + format == GL_RGBA && + type == GL_UNSIGNED_BYTE && + !littleEndian) { + return GL_TRUE; + } + else if (pipeFormat == PIPE_FORMAT_R8G8B8A8_UNORM && + format == GL_ABGR_EXT && + type == GL_UNSIGNED_BYTE && + littleEndian) { + return GL_TRUE; + } + else if (pipeFormat == PIPE_FORMAT_A8R8G8B8_UNORM && + format == GL_BGRA && + type == GL_UNSIGNED_BYTE && + littleEndian) { + return GL_TRUE; + } + else if (pipeFormat == PIPE_FORMAT_R5G6B5_UNORM && + format == GL_RGB && + type == GL_UNSIGNED_SHORT_5_6_5) { + /* endian don't care */ + return GL_TRUE; + } + else if (pipeFormat == PIPE_FORMAT_R5G6B5_UNORM && + format == GL_BGR && + type == GL_UNSIGNED_SHORT_5_6_5_REV) { + /* endian don't care */ + return GL_TRUE; + } + else if (pipeFormat == PIPE_FORMAT_S8_UNORM && + format == GL_STENCIL_INDEX && + type == GL_UNSIGNED_BYTE) { + return GL_TRUE; + } + else if (pipeFormat == PIPE_FORMAT_Z32_UNORM && + format == GL_DEPTH_COMPONENT && + type == GL_UNSIGNED_INT) { + return GL_TRUE; + } + /* XXX add more cases */ + else { + return GL_FALSE; + } +} + + +/** + * Check if any per-fragment ops are enabled. + * XXX probably move this to a re-usable place. + */ +static GLboolean +any_fragment_ops(const struct st_context *st) +{ + if (st->state.depth_stencil.alpha.enabled || + st->state.depth_stencil.depth.enabled || + st->state.blend.blend_enable || + st->state.blend.logicop_enable) + /* XXX more checks */ + return GL_TRUE; + else + return GL_FALSE; +} + + +/** + * Check if any pixel transfer ops are enabled. + * XXX probably move this to a re-usable place. + */ +static GLboolean +any_pixel_transfer_ops(const struct st_context *st) +{ + if (st->ctx->Pixel.RedScale != 1.0 || + st->ctx->Pixel.RedBias != 0.0 || + st->ctx->Pixel.GreenScale != 1.0 || + st->ctx->Pixel.GreenBias != 0.0 || + st->ctx->Pixel.BlueScale != 1.0 || + st->ctx->Pixel.BlueBias != 0.0 || + st->ctx->Pixel.AlphaScale != 1.0 || + st->ctx->Pixel.AlphaBias != 0.0 || + st->ctx->Pixel.MapColorFlag) + /* XXX more checks */ + return GL_TRUE; + else + return GL_FALSE; +} + + +/** + * Draw image with a blit, or other non-textured quad method. + */ +static void +draw_blit(struct st_context *st, + GLsizei width, GLsizei height, + GLenum format, GLenum type, const GLvoid *pixels) +{ + + +} + + +static void +draw_stencil_pixels(GLcontext *ctx, GLint x, GLint y, + GLsizei width, GLsizei height, GLenum type, + const struct gl_pixelstore_attrib *unpack, + const GLvoid *pixels) +{ + struct st_context *st = ctx->st; + struct pipe_context *pipe = st->pipe; + struct pipe_screen *screen = pipe->screen; + struct st_renderbuffer *strb; + struct pipe_surface *ps; + const GLboolean zoom = ctx->Pixel.ZoomX != 1.0 || ctx->Pixel.ZoomY != 1.0; + GLint skipPixels; + ubyte *stmap; + + pipe->flush(pipe, PIPE_FLUSH_RENDER_CACHE, NULL); + + strb = st_renderbuffer(ctx->DrawBuffer-> + Attachment[BUFFER_STENCIL].Renderbuffer); + ps = screen->get_tex_surface(screen, strb->texture, 0, 0, 0, + PIPE_BUFFER_USAGE_CPU_WRITE); + + /* map the stencil buffer */ + stmap = screen->surface_map(screen, ps, + PIPE_BUFFER_USAGE_CPU_WRITE); + + /* if width > MAX_WIDTH, have to process image in chunks */ + skipPixels = 0; + while (skipPixels < width) { + const GLint spanX = x + skipPixels; + const GLint spanWidth = MIN2(width - skipPixels, MAX_WIDTH); + GLint row; + for (row = 0; row < height; row++) { + GLint spanY = y + row; + GLubyte values[MAX_WIDTH]; + GLenum destType = GL_UNSIGNED_BYTE; + const GLvoid *source = _mesa_image_address2d(unpack, pixels, + width, height, + GL_COLOR_INDEX, type, + row, skipPixels); + _mesa_unpack_stencil_span(ctx, spanWidth, destType, values, + type, source, unpack, + ctx->_ImageTransferState); + if (zoom) { + /* + _swrast_write_zoomed_stencil_span(ctx, x, y, spanWidth, + spanX, spanY, values); + */ + } + else { + if (st_fb_orientation(ctx->DrawBuffer) == Y_0_TOP) { + spanY = ctx->DrawBuffer->Height - spanY - 1; + } + + switch (ps->format) { + case PIPE_FORMAT_S8_UNORM: + { + ubyte *dest = stmap + spanY * ps->stride + spanX; + memcpy(dest, values, spanWidth); + } + break; + case PIPE_FORMAT_S8Z24_UNORM: + { + uint *dest = (uint *) (stmap + spanY * ps->stride + spanX*4); + GLint k; + for (k = 0; k < spanWidth; k++) { + uint p = dest[k]; + p = (p & 0xffffff) | (values[k] << 24); + dest[k] = p; + } + } + break; + default: + assert(0); + } + } + } + skipPixels += spanWidth; + } + + /* unmap the stencil buffer */ + screen->surface_unmap(screen, ps); + pipe_surface_reference(&ps, NULL); +} + + +/** + * Called via ctx->Driver.DrawPixels() + */ +static void +st_DrawPixels(GLcontext *ctx, GLint x, GLint y, GLsizei width, GLsizei height, + GLenum format, GLenum type, + const struct gl_pixelstore_attrib *unpack, const GLvoid *pixels) +{ + struct st_fragment_program *stfp; + struct st_vertex_program *stvp; + struct st_context *st = ctx->st; + struct pipe_surface *ps; + GLuint bufferFormat; + const GLfloat *color; + + if (format == GL_STENCIL_INDEX) { + draw_stencil_pixels(ctx, x, y, width, height, type, unpack, pixels); + return; + } + + _mesa_set_vp_override( ctx, TRUE ); + _mesa_update_state( ctx ); + + st_validate_state(st); + + if (format == GL_DEPTH_COMPONENT) { + ps = st->state.framebuffer.zsbuf; + stfp = make_fragment_shader_z(ctx->st); + stvp = st_make_passthrough_vertex_shader(ctx->st, GL_TRUE); + color = ctx->Current.RasterColor; + } + else if (format == GL_STENCIL_INDEX) { + ps = st->state.framebuffer.zsbuf; + /* XXX special case - can't use texture map */ + color = NULL; + } + else { + ps = st->state.framebuffer.cbufs[0]; + stfp = combined_drawpix_fragment_program(ctx); + stvp = st_make_passthrough_vertex_shader(ctx->st, GL_FALSE); + color = NULL; + } + + bufferFormat = ps->format; + + if (1/*any_fragment_ops(st) || + any_pixel_transfer_ops(st) || + !compatible_formats(format, type, ps->format)*/) { + /* textured quad */ + struct pipe_texture *pt + = make_texture(ctx->st, width, height, format, type, unpack, pixels); + if (pt) { + draw_textured_quad(ctx, x, y, ctx->Current.RasterPos[2], + width, height, ctx->Pixel.ZoomX, ctx->Pixel.ZoomY, + pt, stvp, stfp, color, GL_FALSE); + pipe_texture_reference(&pt, NULL); + } + } + else { + /* blit */ + draw_blit(st, width, height, format, type, pixels); + } + + _mesa_set_vp_override( ctx, FALSE ); +} + + + +static void +copy_stencil_pixels(GLcontext *ctx, GLint srcx, GLint srcy, + GLsizei width, GLsizei height, + GLint dstx, GLint dsty) +{ + struct st_renderbuffer *rbDraw = st_renderbuffer(ctx->DrawBuffer->_StencilBuffer); + struct pipe_screen *screen = ctx->st->pipe->screen; + struct pipe_surface *psDraw; + ubyte *drawMap; + ubyte *buffer; + int i; + + buffer = malloc(width * height * sizeof(ubyte)); + if (!buffer) { + _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyPixels(stencil)"); + return; + } + + /* this will do stencil pixel transfer ops */ + st_read_stencil_pixels(ctx, srcx, srcy, width, height, GL_UNSIGNED_BYTE, + &ctx->DefaultPacking, buffer); + + psDraw = screen->get_tex_surface(screen, rbDraw->texture, 0, 0, 0, + PIPE_BUFFER_USAGE_CPU_WRITE); + + assert(psDraw->block.width == 1); + assert(psDraw->block.height == 1); + + /* map the stencil buffer */ + drawMap = screen->surface_map(screen, psDraw, PIPE_BUFFER_USAGE_CPU_WRITE); + + /* draw */ + /* XXX PixelZoom not handled yet */ + for (i = 0; i < height; i++) { + ubyte *dst; + const ubyte *src; + int y; + + y = dsty + i; + + if (st_fb_orientation(ctx->DrawBuffer) == Y_0_TOP) { + y = ctx->DrawBuffer->Height - y - 1; + } + + dst = drawMap + y * psDraw->stride + dstx * psDraw->block.size; + src = buffer + i * width; + + switch (psDraw->format) { + case PIPE_FORMAT_S8Z24_UNORM: + { + uint *dst4 = (uint *) dst; + int j; + for (j = 0; j < width; j++) { + *dst4 = (*dst4 & 0xffffff) | (src[j] << 24); + dst4++; + } + } + break; + case PIPE_FORMAT_S8_UNORM: + memcpy(dst, src, width); + break; + default: + assert(0); + } + } + + free(buffer); + + /* unmap the stencil buffer */ + screen->surface_unmap(screen, psDraw); + pipe_surface_reference(&psDraw, NULL); +} + + +static void +st_CopyPixels(GLcontext *ctx, GLint srcx, GLint srcy, + GLsizei width, GLsizei height, + GLint dstx, GLint dsty, GLenum type) +{ + struct st_context *st = ctx->st; + struct pipe_context *pipe = st->pipe; + struct pipe_screen *screen = pipe->screen; + struct st_renderbuffer *rbRead; + struct st_vertex_program *stvp; + struct st_fragment_program *stfp; + struct pipe_surface *psTex; + struct pipe_texture *pt; + GLfloat *color; + enum pipe_format srcFormat, texFormat; + + /* make sure rendering has completed */ + pipe->flush(pipe, PIPE_FLUSH_RENDER_CACHE, NULL); + + st_validate_state(st); + + if (type == GL_STENCIL) { + /* can't use texturing to do stencil */ + copy_stencil_pixels(ctx, srcx, srcy, width, height, dstx, dsty); + return; + } + + if (type == GL_COLOR) { + rbRead = st_get_color_read_renderbuffer(ctx); + color = NULL; + stfp = combined_drawpix_fragment_program(ctx); + stvp = st_make_passthrough_vertex_shader(ctx->st, GL_FALSE); + } + else { + assert(type == GL_DEPTH); + rbRead = st_renderbuffer(ctx->ReadBuffer->_DepthBuffer); + color = ctx->Current.Attrib[VERT_ATTRIB_COLOR0]; + stfp = make_fragment_shader_z(ctx->st); + stvp = st_make_passthrough_vertex_shader(ctx->st, GL_TRUE); + } + + srcFormat = rbRead->texture->format; + + if (screen->is_format_supported(screen, srcFormat, PIPE_TEXTURE_2D, + PIPE_TEXTURE_USAGE_SAMPLER, 0)) { + texFormat = srcFormat; + } + else { + /* srcFormat can't be used as a texture format */ + if (type == GL_DEPTH) { + texFormat = st_choose_format(pipe, GL_DEPTH_COMPONENT, PIPE_TEXTURE_2D, + PIPE_TEXTURE_USAGE_DEPTH_STENCIL); + assert(texFormat != PIPE_FORMAT_NONE); /* XXX no depth texture formats??? */ + } + else { + /* default color format */ + texFormat = st_choose_format(pipe, GL_RGBA, PIPE_TEXTURE_2D, + PIPE_TEXTURE_USAGE_SAMPLER); + assert(texFormat != PIPE_FORMAT_NONE); + } + } + + pt = st_texture_create(ctx->st, PIPE_TEXTURE_2D, texFormat, 0, + width, height, 1, 0, + PIPE_TEXTURE_USAGE_SAMPLER); + if (!pt) + return; + + if (st_fb_orientation(ctx->DrawBuffer) == Y_0_TOP) { + srcy = ctx->DrawBuffer->Height - srcy - height; + } + + if (srcFormat == texFormat) { + /* copy source framebuffer surface into mipmap/texture */ + struct pipe_surface *psRead = screen->get_tex_surface(screen, + rbRead->texture, 0, 0, 0, + PIPE_BUFFER_USAGE_GPU_READ); + psTex = screen->get_tex_surface(screen, pt, 0, 0, 0, + PIPE_BUFFER_USAGE_GPU_WRITE ); + pipe->surface_copy(pipe, + FALSE, + psTex, /* dest */ + 0, 0, /* destx/y */ + psRead, + srcx, srcy, width, height); + pipe_surface_reference(&psRead, NULL); + } + else { + /* CPU-based fallback/conversion */ + struct pipe_surface *psRead = screen->get_tex_surface(screen, + rbRead->texture, 0, 0, 0, + PIPE_BUFFER_USAGE_CPU_READ); + + psTex = screen->get_tex_surface(screen, pt, 0, 0, 0, + PIPE_BUFFER_USAGE_CPU_WRITE ); + + if (type == GL_COLOR) { + /* alternate path using get/put_tile() */ + GLfloat *buf = (GLfloat *) malloc(width * height * 4 * sizeof(GLfloat)); + + pipe_get_tile_rgba(psRead, srcx, srcy, width, height, buf); + pipe_put_tile_rgba(psTex, 0, 0, width, height, buf); + + free(buf); + } + else { + /* GL_DEPTH */ + GLuint *buf = (GLuint *) malloc(width * height * sizeof(GLuint)); + pipe_get_tile_z(psRead, srcx, srcy, width, height, buf); + pipe_put_tile_z(psTex, 0, 0, width, height, buf); + free(buf); + } + pipe_surface_reference(&psRead, NULL); + } + + pipe_surface_reference(&psTex, NULL); + + /* draw textured quad */ + draw_textured_quad(ctx, dstx, dsty, ctx->Current.RasterPos[2], + width, height, ctx->Pixel.ZoomX, ctx->Pixel.ZoomY, + pt, stvp, stfp, color, GL_TRUE); + + pipe_texture_reference(&pt, NULL); +} + + + +void st_init_drawpixels_functions(struct dd_function_table *functions) +{ + functions->DrawPixels = st_DrawPixels; + functions->CopyPixels = st_CopyPixels; +} + + +void +st_destroy_drawpix(struct st_context *st) +{ + st_reference_fragprog(st, &st->drawpix.z_shader, NULL); + st_reference_fragprog(st, &st->pixel_xfer.combined_prog, NULL); + st_reference_vertprog(st, &st->drawpix.vert_shaders[0], NULL); + st_reference_vertprog(st, &st->drawpix.vert_shaders[1], NULL); +} + + |