--- /dev/null
+/**************************************************************************
+ *
+ * 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 "softpipe/sp_context.h"
+#include "softpipe/sp_defines.h"
+
+
+/**
+ * Convert GLenum blend tokens to softpipe tokens.
+ * Both blend factors and blend funcs are accepted.
+ */
+static GLuint
+gl_blend_to_sp(GLenum blend)
+{
+ switch (blend) {
+ /* blend functions */
+ case GL_FUNC_ADD:
+ return SP_BLEND_ADD;
+ case GL_FUNC_SUBTRACT:
+ return SP_BLEND_SUBTRACT;
+ case GL_FUNC_REVERSE_SUBTRACT:
+ return SP_BLEND_REVERSE_SUBTRACT;
+ case GL_MIN:
+ return SP_BLEND_MIN;
+ case GL_MAX:
+ return SP_BLEND_MAX;
+
+ /* blend factors */
+ case GL_ONE:
+ return SP_BLENDFACTOR_ONE;
+ case GL_SRC_COLOR:
+ return SP_BLENDFACTOR_SRC_COLOR;
+ case GL_SRC_ALPHA:
+ return SP_BLENDFACTOR_SRC_ALPHA;
+ case GL_DST_ALPHA:
+ return SP_BLENDFACTOR_DST_ALPHA;
+ case GL_DST_COLOR:
+ return SP_BLENDFACTOR_DST_COLOR;
+ case GL_SRC_ALPHA_SATURATE:
+ return SP_BLENDFACTOR_SRC_ALPHA_SATURATE;
+ case GL_CONSTANT_COLOR:
+ return SP_BLENDFACTOR_CONST_COLOR;
+ case GL_CONSTANT_ALPHA:
+ return SP_BLENDFACTOR_CONST_ALPHA;
+ /*
+ return SP_BLENDFACTOR_SRC1_COLOR;
+ return SP_BLENDFACTOR_SRC1_ALPHA;
+ */
+ case GL_ZERO:
+ return SP_BLENDFACTOR_ZERO;
+ case GL_ONE_MINUS_SRC_COLOR:
+ return SP_BLENDFACTOR_INV_SRC_COLOR;
+ case GL_ONE_MINUS_SRC_ALPHA:
+ return SP_BLENDFACTOR_INV_SRC_ALPHA;
+ case GL_ONE_MINUS_DST_COLOR:
+ return SP_BLENDFACTOR_INV_DST_ALPHA;
+ case GL_ONE_MINUS_DST_ALPHA:
+ return SP_BLENDFACTOR_INV_DST_COLOR;
+ case GL_ONE_MINUS_CONSTANT_COLOR:
+ return SP_BLENDFACTOR_INV_CONST_COLOR;
+ case GL_ONE_MINUS_CONSTANT_ALPHA:
+ return SP_BLENDFACTOR_INV_CONST_ALPHA;
+ /*
+ return SP_BLENDFACTOR_INV_SRC1_COLOR;
+ return SP_BLENDFACTOR_INV_SRC1_ALPHA;
+ */
+ default:
+ assert("invalid GL token in gl_blend_to_sp()" == NULL);
+ return 0;
+ }
+}
+
+
+/**
+ * Convert GLenum logicop tokens to softpipe tokens.
+ */
+static GLuint
+gl_logicop_to_sp(GLenum logicop)
+{
+ switch (logicop) {
+ case GL_CLEAR:
+ return SP_LOGICOP_CLEAR;
+ case GL_NOR:
+ return SP_LOGICOP_NOR;
+ case GL_AND_INVERTED:
+ return SP_LOGICOP_AND_INVERTED;
+ case GL_COPY_INVERTED:
+ return SP_LOGICOP_COPY_INVERTED;
+ case GL_AND_REVERSE:
+ return SP_LOGICOP_AND_REVERSE;
+ case GL_INVERT:
+ return SP_LOGICOP_INVERT;
+ case GL_XOR:
+ return SP_LOGICOP_XOR;
+ case GL_NAND:
+ return SP_LOGICOP_NAND;
+ case GL_AND:
+ return SP_LOGICOP_AND;
+ case GL_EQUIV:
+ return SP_LOGICOP_EQUIV;
+ case GL_NOOP:
+ return SP_LOGICOP_NOOP;
+ case GL_OR_INVERTED:
+ return SP_LOGICOP_OR_INVERTED;
+ case GL_COPY:
+ return SP_LOGICOP_COPY;
+ case GL_OR_REVERSE:
+ return SP_LOGICOP_OR_REVERSE;
+ case GL_OR:
+ return SP_LOGICOP_OR;
+ case GL_SET:
+ return SP_LOGICOP_SET;
+ default:
+ assert("invalid GL token in gl_logicop_to_sp()" == NULL);
+ return 0;
+ }
+}
+
+
+static void
+update_blend( struct st_context *st )
+{
+ struct softpipe_blend_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 = gl_logicop_to_sp(st->ctx->Color.LogicOp);
+ }
+ else if (st->ctx->Color.BlendEnabled) {
+ /* blending enabled */
+ blend.blend_enable = 1;
+
+ blend.rgb_func = gl_blend_to_sp(st->ctx->Color.BlendEquationRGB);
+ blend.rgb_src_factor = gl_blend_to_sp(st->ctx->Color.BlendSrcRGB);
+ blend.rgb_dst_factor = gl_blend_to_sp(st->ctx->Color.BlendDstRGB);
+
+ blend.alpha_func = gl_blend_to_sp(st->ctx->Color.BlendEquationA);
+ blend.alpha_src_factor = gl_blend_to_sp(st->ctx->Color.BlendSrcA);
+ blend.alpha_dst_factor = gl_blend_to_sp(st->ctx->Color.BlendDstA);
+ }
+ else {
+ /* no blending / logicop */
+ }
+
+ if (memcmp(&blend, &st->state.blend, sizeof(blend)) != 0) {
+ /* state has changed */
+ st->state.blend = blend; /* struct copy */
+ st->softpipe->set_blend_state(st->softpipe, &blend); /* set new state */
+ }
+}
+
+
+const struct st_tracked_state st_update_blend = {
+ .dirty = {
+ .mesa = (_NEW_COLOR), /* XXX _NEW_BLEND someday? */
+ .st = 0,
+ },
+ .update = update_blend
+};
+
+
+
+
+
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