diff options
Diffstat (limited to 'src/mesa/state_tracker/st_atom_blend.c')
| -rw-r--r-- | src/mesa/state_tracker/st_atom_blend.c | 232 |
1 files changed, 232 insertions, 0 deletions
diff --git a/src/mesa/state_tracker/st_atom_blend.c b/src/mesa/state_tracker/st_atom_blend.c new file mode 100644 index 0000000000..35c09c3e08 --- /dev/null +++ b/src/mesa/state_tracker/st_atom_blend.c @@ -0,0 +1,232 @@ +/************************************************************************** + * + * 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 + */ + + +#include "st_context.h" +#include "st_atom.h" + +#include "pipe/p_context.h" +#include "pipe/p_defines.h" +#include "cso_cache/cso_context.h" + +#include "main/macros.h" + +/** + * Convert GLenum blend tokens to pipe tokens. + * Both blend factors and blend funcs are accepted. + */ +static GLuint +translate_blend(GLenum blend) +{ + switch (blend) { + /* blend functions */ + case GL_FUNC_ADD: + return PIPE_BLEND_ADD; + case GL_FUNC_SUBTRACT: + return PIPE_BLEND_SUBTRACT; + case GL_FUNC_REVERSE_SUBTRACT: + return PIPE_BLEND_REVERSE_SUBTRACT; + case GL_MIN: + return PIPE_BLEND_MIN; + case GL_MAX: + return PIPE_BLEND_MAX; + + /* blend factors */ + case GL_ONE: + return PIPE_BLENDFACTOR_ONE; + case GL_SRC_COLOR: + return PIPE_BLENDFACTOR_SRC_COLOR; + case GL_SRC_ALPHA: + return PIPE_BLENDFACTOR_SRC_ALPHA; + case GL_DST_ALPHA: + return PIPE_BLENDFACTOR_DST_ALPHA; + case GL_DST_COLOR: + return PIPE_BLENDFACTOR_DST_COLOR; + case GL_SRC_ALPHA_SATURATE: + return PIPE_BLENDFACTOR_SRC_ALPHA_SATURATE; + case GL_CONSTANT_COLOR: + return PIPE_BLENDFACTOR_CONST_COLOR; + case GL_CONSTANT_ALPHA: + return PIPE_BLENDFACTOR_CONST_ALPHA; + /* + return PIPE_BLENDFACTOR_SRC1_COLOR; + return PIPE_BLENDFACTOR_SRC1_ALPHA; + */ + case GL_ZERO: + return PIPE_BLENDFACTOR_ZERO; + case GL_ONE_MINUS_SRC_COLOR: + return PIPE_BLENDFACTOR_INV_SRC_COLOR; + case GL_ONE_MINUS_SRC_ALPHA: + return PIPE_BLENDFACTOR_INV_SRC_ALPHA; + case GL_ONE_MINUS_DST_COLOR: + return PIPE_BLENDFACTOR_INV_DST_COLOR; + case GL_ONE_MINUS_DST_ALPHA: + return PIPE_BLENDFACTOR_INV_DST_ALPHA; + case GL_ONE_MINUS_CONSTANT_COLOR: + return PIPE_BLENDFACTOR_INV_CONST_COLOR; + case GL_ONE_MINUS_CONSTANT_ALPHA: + return PIPE_BLENDFACTOR_INV_CONST_ALPHA; + /* + return PIPE_BLENDFACTOR_INV_SRC1_COLOR; + return PIPE_BLENDFACTOR_INV_SRC1_ALPHA; + */ + default: + assert("invalid GL token in translate_blend()" == NULL); + return 0; + } +} + + +/** + * Convert GLenum logicop tokens to pipe tokens. + */ +static GLuint +translate_logicop(GLenum logicop) +{ + switch (logicop) { + case GL_CLEAR: + return PIPE_LOGICOP_CLEAR; + case GL_NOR: + return PIPE_LOGICOP_NOR; + case GL_AND_INVERTED: + return PIPE_LOGICOP_AND_INVERTED; + case GL_COPY_INVERTED: + return PIPE_LOGICOP_COPY_INVERTED; + case GL_AND_REVERSE: + return PIPE_LOGICOP_AND_REVERSE; + case GL_INVERT: + return PIPE_LOGICOP_INVERT; + case GL_XOR: + return PIPE_LOGICOP_XOR; + case GL_NAND: + return PIPE_LOGICOP_NAND; + case GL_AND: + return PIPE_LOGICOP_AND; + case GL_EQUIV: + return PIPE_LOGICOP_EQUIV; + case GL_NOOP: + return PIPE_LOGICOP_NOOP; + case GL_OR_INVERTED: + return PIPE_LOGICOP_OR_INVERTED; + case GL_COPY: + return PIPE_LOGICOP_COPY; + case GL_OR_REVERSE: + return PIPE_LOGICOP_OR_REVERSE; + case GL_OR: + return PIPE_LOGICOP_OR; + case GL_SET: + return PIPE_LOGICOP_SET; + default: + assert("invalid GL token in translate_logicop()" == NULL); + return 0; + } +} + + +static void +update_blend( struct st_context *st ) +{ + struct pipe_blend_state *blend = &st->state.blend; + + memset(blend, 0, sizeof(*blend)); + + if (st->ctx->Color.ColorLogicOpEnabled || + (st->ctx->Color.BlendEnabled && + st->ctx->Color.BlendEquationRGB == GL_LOGIC_OP)) { + /* logicop enabled */ + blend->logicop_enable = 1; + blend->logicop_func = translate_logicop(st->ctx->Color.LogicOp); + } + else if (st->ctx->Color.BlendEnabled) { + /* blending enabled */ + blend->blend_enable = 1; + + blend->rgb_func = translate_blend(st->ctx->Color.BlendEquationRGB); + if (st->ctx->Color.BlendEquationRGB == GL_MIN || + st->ctx->Color.BlendEquationRGB == GL_MAX) { + /* Min/max are special */ + blend->rgb_src_factor = PIPE_BLENDFACTOR_ONE; + blend->rgb_dst_factor = PIPE_BLENDFACTOR_ONE; + } + else { + blend->rgb_src_factor = translate_blend(st->ctx->Color.BlendSrcRGB); + blend->rgb_dst_factor = translate_blend(st->ctx->Color.BlendDstRGB); + } + + blend->alpha_func = translate_blend(st->ctx->Color.BlendEquationA); + if (st->ctx->Color.BlendEquationA == GL_MIN || + st->ctx->Color.BlendEquationA == GL_MAX) { + /* Min/max are special */ + blend->alpha_src_factor = PIPE_BLENDFACTOR_ONE; + blend->alpha_dst_factor = PIPE_BLENDFACTOR_ONE; + } + else { + blend->alpha_src_factor = translate_blend(st->ctx->Color.BlendSrcA); + blend->alpha_dst_factor = translate_blend(st->ctx->Color.BlendDstA); + } + } + else { + /* no blending / logicop */ + } + + /* Colormask - maybe reverse these bits? */ + if (st->ctx->Color.ColorMask[0]) + blend->colormask |= PIPE_MASK_R; + if (st->ctx->Color.ColorMask[1]) + blend->colormask |= PIPE_MASK_G; + if (st->ctx->Color.ColorMask[2]) + blend->colormask |= PIPE_MASK_B; + if (st->ctx->Color.ColorMask[3]) + blend->colormask |= PIPE_MASK_A; + + if (st->ctx->Color.DitherFlag) + blend->dither = 1; + + cso_set_blend(st->cso_context, blend); + + { + struct pipe_blend_color bc; + COPY_4FV(bc.color, st->ctx->Color.BlendColor); + cso_set_blend_color(st->cso_context, &bc); + } +} + + +const struct st_tracked_state st_update_blend = { + "st_update_blend", /* name */ + { /* dirty */ + (_NEW_COLOR), /* XXX _NEW_BLEND someday? */ /* mesa */ + 0, /* st */ + }, + update_blend, /* update */ +}; |