| /************************************************************************** |
| * |
| * 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 <keith@tungstengraphics.com> |
| * Brian Paul |
| * Zack Rusin |
| */ |
| |
| |
| #include <assert.h> |
| |
| #include "st_context.h" |
| #include "st_atom.h" |
| #include "pipe/p_context.h" |
| #include "pipe/p_defines.h" |
| #include "cso_cache/cso_context.h" |
| |
| |
| /** |
| * Convert an OpenGL compare mode to a pipe tokens. |
| */ |
| GLuint |
| st_compare_func_to_pipe(GLenum func) |
| { |
| /* Same values, just biased */ |
| STATIC_ASSERT(PIPE_FUNC_NEVER == GL_NEVER - GL_NEVER); |
| STATIC_ASSERT(PIPE_FUNC_LESS == GL_LESS - GL_NEVER); |
| STATIC_ASSERT(PIPE_FUNC_EQUAL == GL_EQUAL - GL_NEVER); |
| STATIC_ASSERT(PIPE_FUNC_LEQUAL == GL_LEQUAL - GL_NEVER); |
| STATIC_ASSERT(PIPE_FUNC_GREATER == GL_GREATER - GL_NEVER); |
| STATIC_ASSERT(PIPE_FUNC_NOTEQUAL == GL_NOTEQUAL - GL_NEVER); |
| STATIC_ASSERT(PIPE_FUNC_GEQUAL == GL_GEQUAL - GL_NEVER); |
| STATIC_ASSERT(PIPE_FUNC_ALWAYS == GL_ALWAYS - GL_NEVER); |
| assert(func >= GL_NEVER); |
| assert(func <= GL_ALWAYS); |
| return func - GL_NEVER; |
| } |
| |
| |
| /** |
| * Convert GLenum stencil op tokens to pipe tokens. |
| */ |
| static GLuint |
| gl_stencil_op_to_pipe(GLenum func) |
| { |
| switch (func) { |
| case GL_KEEP: |
| return PIPE_STENCIL_OP_KEEP; |
| case GL_ZERO: |
| return PIPE_STENCIL_OP_ZERO; |
| case GL_REPLACE: |
| return PIPE_STENCIL_OP_REPLACE; |
| case GL_INCR: |
| return PIPE_STENCIL_OP_INCR; |
| case GL_DECR: |
| return PIPE_STENCIL_OP_DECR; |
| case GL_INCR_WRAP: |
| return PIPE_STENCIL_OP_INCR_WRAP; |
| case GL_DECR_WRAP: |
| return PIPE_STENCIL_OP_DECR_WRAP; |
| case GL_INVERT: |
| return PIPE_STENCIL_OP_INVERT; |
| default: |
| assert("invalid GL token in gl_stencil_op_to_pipe()" == NULL); |
| return 0; |
| } |
| } |
| |
| static void |
| update_depth_stencil_alpha(struct st_context *st) |
| { |
| struct pipe_depth_stencil_alpha_state *dsa = &st->state.depth_stencil; |
| struct pipe_stencil_ref sr; |
| struct gl_context *ctx = st->ctx; |
| |
| memset(dsa, 0, sizeof(*dsa)); |
| memset(&sr, 0, sizeof(sr)); |
| |
| if (ctx->Depth.Test && ctx->DrawBuffer->Visual.depthBits > 0) { |
| dsa->depth.enabled = 1; |
| dsa->depth.writemask = ctx->Depth.Mask; |
| dsa->depth.func = st_compare_func_to_pipe(ctx->Depth.Func); |
| } |
| |
| if (ctx->Stencil.Enabled && ctx->DrawBuffer->Visual.stencilBits > 0) { |
| dsa->stencil[0].enabled = 1; |
| dsa->stencil[0].func = st_compare_func_to_pipe(ctx->Stencil.Function[0]); |
| dsa->stencil[0].fail_op = gl_stencil_op_to_pipe(ctx->Stencil.FailFunc[0]); |
| dsa->stencil[0].zfail_op = gl_stencil_op_to_pipe(ctx->Stencil.ZFailFunc[0]); |
| dsa->stencil[0].zpass_op = gl_stencil_op_to_pipe(ctx->Stencil.ZPassFunc[0]); |
| dsa->stencil[0].valuemask = ctx->Stencil.ValueMask[0] & 0xff; |
| dsa->stencil[0].writemask = ctx->Stencil.WriteMask[0] & 0xff; |
| sr.ref_value[0] = ctx->Stencil.Ref[0] & 0xff; |
| |
| if (ctx->Stencil._TestTwoSide) { |
| const GLuint back = ctx->Stencil._BackFace; |
| dsa->stencil[1].enabled = 1; |
| dsa->stencil[1].func = st_compare_func_to_pipe(ctx->Stencil.Function[back]); |
| dsa->stencil[1].fail_op = gl_stencil_op_to_pipe(ctx->Stencil.FailFunc[back]); |
| dsa->stencil[1].zfail_op = gl_stencil_op_to_pipe(ctx->Stencil.ZFailFunc[back]); |
| dsa->stencil[1].zpass_op = gl_stencil_op_to_pipe(ctx->Stencil.ZPassFunc[back]); |
| dsa->stencil[1].valuemask = ctx->Stencil.ValueMask[back] & 0xff; |
| dsa->stencil[1].writemask = ctx->Stencil.WriteMask[back] & 0xff; |
| sr.ref_value[1] = ctx->Stencil.Ref[back] & 0xff; |
| } |
| else { |
| /* This should be unnecessary. Drivers must not expect this to |
| * contain valid data, except the enabled bit |
| */ |
| dsa->stencil[1] = dsa->stencil[0]; |
| dsa->stencil[1].enabled = 0; |
| sr.ref_value[1] = sr.ref_value[0]; |
| } |
| } |
| |
| if (ctx->Color.AlphaEnabled) { |
| dsa->alpha.enabled = 1; |
| dsa->alpha.func = st_compare_func_to_pipe(ctx->Color.AlphaFunc); |
| dsa->alpha.ref_value = ctx->Color.AlphaRefUnclamped; |
| } |
| |
| cso_set_depth_stencil_alpha(st->cso_context, dsa); |
| cso_set_stencil_ref(st->cso_context, &sr); |
| } |
| |
| |
| const struct st_tracked_state st_update_depth_stencil_alpha = { |
| "st_update_depth_stencil", /* name */ |
| { /* dirty */ |
| (_NEW_DEPTH|_NEW_STENCIL|_NEW_COLOR), /* mesa */ |
| 0, /* st */ |
| }, |
| update_depth_stencil_alpha /* update */ |
| }; |