/************************************************************************** * * 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: * Keith Whitwell * Brian Paul */ #include "main/glheader.h" #include "main/macros.h" #include "shader/prog_instruction.h" #include "st_atom.h" #include "st_context.h" #include "st_cb_clear.h" #include "st_cb_fbo.h" #include "st_draw.h" #include "st_program.h" #include "st_public.h" #include "pipe/p_context.h" #include "pipe/p_state.h" #include "pipe/p_defines.h" #include "pipe/p_winsys.h" #include "pipe/tgsi/mesa/mesa_to_tgsi.h" #include "vf/vf.h" static GLuint color_value(GLuint pipeFormat, const GLfloat color[4]) { GLubyte r, g, b, a; UNCLAMPED_FLOAT_TO_UBYTE(r, color[0]); UNCLAMPED_FLOAT_TO_UBYTE(g, color[1]); UNCLAMPED_FLOAT_TO_UBYTE(b, color[2]); UNCLAMPED_FLOAT_TO_UBYTE(a, color[3]); switch (pipeFormat) { case PIPE_FORMAT_U_R8_G8_B8_A8: return (r << 24) | (g << 16) | (b << 8) | a; case PIPE_FORMAT_U_A8_R8_G8_B8: return (a << 24) | (r << 16) | (g << 8) | b; case PIPE_FORMAT_U_R5_G6_B5: return ((r & 0xf8) << 8) | ((g & 0xfc) << 3) | (b >> 3); default: return 0; } } static GLuint depth_value(GLuint pipeFormat, GLfloat value) { GLuint val; switch (pipeFormat) { case PIPE_FORMAT_U_Z16: val = (GLuint) (value * 0xffffff); break; case PIPE_FORMAT_U_Z32: val = (GLuint) (value * 0xffffffff); break; case PIPE_FORMAT_S8_Z24: /*case PIPE_FORMAT_Z24_S8:*/ val = (GLuint) (value * 0xffffff); break; default: assert(0); } return val; } static GLboolean is_depth_stencil_format(GLuint pipeFormat) { switch (pipeFormat) { case PIPE_FORMAT_S8_Z24: /*case PIPE_FORMAT_Z24_S8:*/ return GL_TRUE; default: return GL_FALSE; } } /** * Create a simple fragment shader that just passes through the fragment color. */ static struct st_fragment_program * make_color_shader(struct st_context *st) { GLcontext *ctx = st->ctx; struct st_fragment_program *stfp; struct gl_program *p; GLboolean b; p = ctx->Driver.NewProgram(ctx, GL_FRAGMENT_PROGRAM_ARB, 0); if (!p) return NULL; p->NumInstructions = 2; p->Instructions = _mesa_alloc_instructions(2); if (!p->Instructions) { ctx->Driver.DeleteProgram(ctx, p); return NULL; } _mesa_init_instructions(p->Instructions, 2); /* MOV result.color, fragment.color; */ p->Instructions[0].Opcode = OPCODE_MOV; p->Instructions[0].DstReg.File = PROGRAM_OUTPUT; p->Instructions[0].DstReg.Index = FRAG_RESULT_COLR; p->Instructions[0].SrcReg[0].File = PROGRAM_INPUT; p->Instructions[0].SrcReg[0].Index = FRAG_ATTRIB_COL0; /* END; */ p->Instructions[1].Opcode = OPCODE_END; p->InputsRead = FRAG_BIT_COL0; p->OutputsWritten = (1 << FRAG_RESULT_COLR); stfp = (struct st_fragment_program *) p; /* compile into tgsi format */ b = tgsi_mesa_compile_fp_program(&stfp->Base, stfp->tokens, ST_FP_MAX_TOKENS); assert(b); return stfp; } /** * Create a simple vertex shader that just passes through the * vertex position and color. */ static struct st_vertex_program * make_vertex_shader(struct st_context *st) { GLcontext *ctx = st->ctx; struct st_vertex_program *stvp; struct gl_program *p; GLboolean b; p = ctx->Driver.NewProgram(ctx, GL_VERTEX_PROGRAM_ARB, 0); if (!p) return NULL; p->NumInstructions = 3; p->Instructions = _mesa_alloc_instructions(3); if (!p->Instructions) { ctx->Driver.DeleteProgram(ctx, p); return NULL; } _mesa_init_instructions(p->Instructions, 3); /* 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.color, vertex.color; */ p->Instructions[1].Opcode = OPCODE_MOV; p->Instructions[1].DstReg.File = PROGRAM_OUTPUT; p->Instructions[1].DstReg.Index = VERT_RESULT_COL0; p->Instructions[1].SrcReg[0].File = PROGRAM_INPUT; p->Instructions[1].SrcReg[0].Index = VERT_ATTRIB_COLOR0; /* END; */ p->Instructions[2].Opcode = OPCODE_END; p->InputsRead = VERT_BIT_POS | VERT_BIT_COLOR0; p->OutputsWritten = ((1 << VERT_RESULT_COL0) | (1 << VERT_RESULT_HPOS)); stvp = (struct st_vertex_program *) p; /* compile into tgsi format */ b = tgsi_mesa_compile_vp_program(&stvp->Base, stvp->tokens, ST_FP_MAX_TOKENS); assert(b); return stvp; } /** * Draw a screen-aligned quadrilateral. * Coords are window coords with y=0=bottom. These coords will be transformed * by the vertex shader and viewport transform (which will flip Y if needed). */ static void draw_quad(GLcontext *ctx, float x0, float y0, float x1, float y1, GLfloat z, const GLfloat color[4]) { static const GLuint attribs[2] = { 0, /* pos */ 3 /* color */ }; GLfloat verts[4][2][4]; /* four verts, two attribs, XYZW */ GLuint i; /* positions */ verts[0][0][0] = x0; verts[0][0][1] = y0; verts[1][0][0] = x1; verts[1][0][1] = y0; verts[2][0][0] = x1; verts[2][0][1] = y1; verts[3][0][0] = x0; verts[3][0][1] = y1; /* same for all verts: */ for (i = 0; i < 4; i++) { verts[i][0][2] = z; verts[i][0][3] = 1.0; verts[i][1][0] = color[0]; verts[i][1][1] = color[1]; verts[i][1][2] = color[2]; verts[i][1][3] = color[3]; } st_draw_vertices(ctx, PIPE_PRIM_QUADS, 4, (float *) verts, 2, attribs); } /** * Do glClear by drawing a quadrilateral. * The vertices of the quad will be computed from the * ctx->DrawBuffer->_X/Ymin/max fields. */ static void clear_with_quad(GLcontext *ctx, GLboolean color, GLboolean depth, GLboolean stencil) { struct st_context *st = ctx->st; struct pipe_context *pipe = ctx->st->pipe; const GLfloat x0 = ctx->DrawBuffer->_Xmin; const GLfloat y0 = ctx->DrawBuffer->_Ymin; const GLfloat x1 = ctx->DrawBuffer->_Xmax; const GLfloat y1 = ctx->DrawBuffer->_Ymax; /* alpha state: disabled */ { struct pipe_alpha_test_state alpha_test; memset(&alpha_test, 0, sizeof(alpha_test)); pipe->set_alpha_test_state(pipe, &alpha_test); } /* blend state: RGBA masking */ { struct pipe_blend_state blend; memset(&blend, 0, sizeof(blend)); if (color) { if (ctx->Color.ColorMask[0]) blend.colormask |= PIPE_MASK_R; if (ctx->Color.ColorMask[1]) blend.colormask |= PIPE_MASK_G; if (ctx->Color.ColorMask[2]) blend.colormask |= PIPE_MASK_B; if (ctx->Color.ColorMask[3]) blend.colormask |= PIPE_MASK_A; if (st->ctx->Color.DitherFlag) blend.dither = 1; } pipe->set_blend_state(pipe, &blend); } /* depth state: always pass */ { struct pipe_depth_state depth_test; memset(&depth_test, 0, sizeof(depth_test)); if (depth) { depth_test.enabled = 1; depth_test.writemask = 1; depth_test.func = PIPE_FUNC_ALWAYS; } pipe->set_depth_state(pipe, &depth_test); } /* setup state: nothing */ { struct pipe_setup_state setup; memset(&setup, 0, sizeof(setup)); #if 0 /* don't do per-pixel scissor; we'll just draw a PIPE_PRIM_QUAD * that matches the scissor bounds. */ if (ctx->Scissor.Enabled) setup.scissor = 1; #endif pipe->set_setup_state(pipe, &setup); } /* stencil state: always set to ref value */ { struct pipe_stencil_state stencil_test; memset(&stencil_test, 0, sizeof(stencil_test)); if (stencil) { stencil_test.front_enabled = 1; stencil_test.front_func = PIPE_FUNC_ALWAYS; stencil_test.front_fail_op = PIPE_STENCIL_OP_REPLACE; stencil_test.front_zpass_op = PIPE_STENCIL_OP_REPLACE; stencil_test.front_zfail_op = PIPE_STENCIL_OP_REPLACE; stencil_test.ref_value[0] = ctx->Stencil.Clear; stencil_test.value_mask[0] = 0xff; stencil_test.write_mask[0] = ctx->Stencil.WriteMask[0] & 0xff; } pipe->set_stencil_state(pipe, &stencil_test); } /* fragment shader state: color pass-through program */ { static struct st_fragment_program *stfp = NULL; struct pipe_shader_state fs; if (!stfp) { stfp = make_color_shader(st); } memset(&fs, 0, sizeof(fs)); fs.inputs_read = tgsi_mesa_translate_fragment_input_mask(stfp->Base.Base.InputsRead); fs.outputs_written = tgsi_mesa_translate_fragment_output_mask(stfp->Base.Base.OutputsWritten); fs.tokens = &stfp->tokens[0]; pipe->set_fs_state(pipe, &fs); } /* vertex shader state: color/position pass-through */ { static struct st_vertex_program *stvp = NULL; struct pipe_shader_state vs; if (!stvp) { stvp = make_vertex_shader(st); } memset(&vs, 0, sizeof(vs)); vs.inputs_read = stvp->Base.Base.InputsRead; vs.outputs_written = stvp->Base.Base.OutputsWritten; vs.tokens = &stvp->tokens[0]; pipe->set_vs_state(pipe, &vs); } /* viewport state: viewport matching window dims */ { const float width = ctx->DrawBuffer->Width; const float height = ctx->DrawBuffer->Height; struct pipe_viewport_state vp; vp.scale[0] = 0.5 * width; vp.scale[1] = -0.5 * height; vp.scale[2] = 0.5; vp.scale[3] = 1.0; vp.translate[0] = 0.5 * width; vp.translate[1] = 0.5 * height; vp.translate[2] = 0.5; vp.translate[3] = 0.0; pipe->set_viewport_state(pipe, &vp); } /* draw quad matching scissor rect (XXX verify coord round-off) */ draw_quad(ctx, x0, y0, x1, y1, ctx->Depth.Clear, ctx->Color.ClearColor); /* Restore pipe state */ pipe->set_alpha_test_state(pipe, &st->state.alpha_test); pipe->set_blend_state(pipe, &st->state.blend); pipe->set_depth_state(pipe, &st->state.depth); pipe->set_fs_state(pipe, &st->state.fs); pipe->set_vs_state(pipe, &st->state.vs); pipe->set_setup_state(pipe, &st->state.setup); pipe->set_stencil_state(pipe, &st->state.stencil); pipe->set_viewport_state(pipe, &ctx->st->state.viewport); /* OR: st_invalidate_state(ctx, _NEW_COLOR | _NEW_DEPTH | _NEW_STENCIL); */ } static void clear_color_buffer(GLcontext *ctx, struct gl_renderbuffer *rb) { struct st_renderbuffer *strb = st_renderbuffer(rb); if (ctx->Color.ColorMask[0] && ctx->Color.ColorMask[1] && ctx->Color.ColorMask[2] && ctx->Color.ColorMask[3] && !ctx->Scissor.Enabled) { /* clear whole buffer w/out masking */ GLuint clearValue = color_value(strb->surface->format, ctx->Color.ClearColor); ctx->st->pipe->clear(ctx->st->pipe, strb->surface, clearValue); } else { /* masking or scissoring */ clear_with_quad(ctx, GL_TRUE, GL_FALSE, GL_FALSE); } } static void clear_accum_buffer(GLcontext *ctx, struct gl_renderbuffer *rb) { struct st_renderbuffer *strb = st_renderbuffer(rb); if (!ctx->Scissor.Enabled) { /* clear whole buffer w/out masking */ GLuint clearValue = color_value(strb->surface->format, ctx->Accum.ClearColor); /* Note that clearValue is 32 bits but the accum buffer will * typically be 64bpp... */ ctx->st->pipe->clear(ctx->st->pipe, strb->surface, clearValue); } else { /* scissoring */ /* XXX point framebuffer.cbufs[0] at the accum buffer */ clear_with_quad(ctx, GL_TRUE, GL_FALSE, GL_FALSE); } } static void clear_depth_buffer(GLcontext *ctx, struct gl_renderbuffer *rb) { struct st_renderbuffer *strb = st_renderbuffer(rb); const GLboolean isDS = is_depth_stencil_format(strb->surface->format); assert(strb->surface->format); if (ctx->Scissor.Enabled || (isDS && ctx->DrawBuffer->Visual.stencilBits > 0)) { /* scissoring or we have a combined depth/stencil buffer */ clear_with_quad(ctx, GL_FALSE, GL_TRUE, GL_FALSE); } else { /* simple clear of whole buffer */ GLuint clearValue = depth_value(strb->surface->format, ctx->Depth.Clear); ctx->st->pipe->clear(ctx->st->pipe, strb->surface, clearValue); } } static void clear_stencil_buffer(GLcontext *ctx, struct gl_renderbuffer *rb) { struct st_renderbuffer *strb = st_renderbuffer(rb); const GLboolean isDS = is_depth_stencil_format(strb->surface->format); const GLuint stencilMax = (1 << rb->StencilBits) - 1; GLboolean maskStencil = ctx->Stencil.WriteMask[0] != stencilMax; if (maskStencil || ctx->Scissor.Enabled || (isDS && ctx->DrawBuffer->Visual.depthBits > 0)) { /* masking or scissoring or combined depth/stencil buffer */ clear_with_quad(ctx, GL_FALSE, GL_FALSE, GL_TRUE); } else { /* simple clear of whole buffer */ GLuint clearValue = ctx->Stencil.Clear; ctx->st->pipe->clear(ctx->st->pipe, strb->surface, clearValue); } } static void clear_depth_stencil_buffer(GLcontext *ctx, struct gl_renderbuffer *rb) { struct st_renderbuffer *strb = st_renderbuffer(rb); const GLuint stencilMax = 1 << rb->StencilBits; GLboolean maskStencil = ctx->Stencil.WriteMask[0] != stencilMax; assert(is_depth_stencil_format(strb->surface->format)); if (!maskStencil && !ctx->Scissor.Enabled) { /* clear whole buffer w/out masking */ GLuint clearValue = depth_value(strb->surface->format, ctx->Depth.Clear); switch (strb->surface->format) { case PIPE_FORMAT_S8_Z24: clearValue |= ctx->Stencil.Clear << 24; break; #if 0 case PIPE_FORMAT_Z24_S8: clearValue = (clearValue << 8) | clearVal; break; #endif default: assert(0); } ctx->st->pipe->clear(ctx->st->pipe, strb->surface, clearValue); } else { /* masking or scissoring */ clear_with_quad(ctx, GL_FALSE, GL_TRUE, GL_TRUE); } } /** * Called via ctx->Driver.Clear() * XXX: doesn't pick up the differences between front/back/left/right * clears. Need to sort that out... */ static void st_clear(GLcontext *ctx, GLbitfield mask) { static const GLbitfield BUFFER_BITS_DS = (BUFFER_BIT_DEPTH | BUFFER_BIT_STENCIL); struct st_context *st = ctx->st; struct gl_renderbuffer *depthRb = ctx->DrawBuffer->Attachment[BUFFER_DEPTH].Renderbuffer; struct gl_renderbuffer *stencilRb = ctx->DrawBuffer->Attachment[BUFFER_STENCIL].Renderbuffer; /* This makes sure the softpipe has the latest scissor, etc values */ st_validate_state( st ); /* * XXX TO-DO: * If we're going to use clear_with_quad() for any reason, use it to * clear as many other buffers as possible. * As it is now, we sometimes call clear_with_quad() three times to clear * color/depth/stencil individually... */ if (mask & BUFFER_BITS_COLOR) { GLuint b; for (b = 0; b < BUFFER_COUNT; b++) { if (BUFFER_BITS_COLOR & mask & (1 << b)) { struct gl_renderbuffer *rb = ctx->DrawBuffer->Attachment[b].Renderbuffer; assert(rb); clear_color_buffer(ctx, rb); } } } if (mask & BUFFER_BIT_ACCUM) { clear_accum_buffer(ctx, ctx->DrawBuffer->Attachment[BUFFER_ACCUM].Renderbuffer); } if ((mask & BUFFER_BITS_DS) == BUFFER_BITS_DS && depthRb == stencilRb) { /* clearing combined depth + stencil */ clear_depth_stencil_buffer(ctx, depthRb); } else { /* separate depth/stencil clears */ if (mask & BUFFER_BIT_DEPTH) { clear_depth_buffer(ctx, depthRb); } if (mask & BUFFER_BIT_STENCIL) { clear_stencil_buffer(ctx, stencilRb); } } } void st_init_clear_functions(struct dd_function_table *functions) { functions->Clear = st_clear; }