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Diffstat (limited to 'src/mesa/pipe/softpipe/sp_quad_blend.c')
-rw-r--r--src/mesa/pipe/softpipe/sp_quad_blend.c395
1 files changed, 395 insertions, 0 deletions
diff --git a/src/mesa/pipe/softpipe/sp_quad_blend.c b/src/mesa/pipe/softpipe/sp_quad_blend.c
new file mode 100644
index 0000000000..3d097aea65
--- /dev/null
+++ b/src/mesa/pipe/softpipe/sp_quad_blend.c
@@ -0,0 +1,395 @@
+/**************************************************************************
+ *
+ * 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.
+ *
+ **************************************************************************/
+
+/**
+ * quad blending
+ * \author Brian Paul
+ */
+
+#include "glheader.h"
+#include "imports.h"
+#include "macros.h"
+#include "pipe/p_defines.h"
+#include "sp_context.h"
+#include "sp_headers.h"
+#include "sp_surface.h"
+#include "sp_quad.h"
+
+
+#define VEC4_COPY(DST, SRC) \
+do { \
+ DST[0] = SRC[0]; \
+ DST[1] = SRC[1]; \
+ DST[2] = SRC[2]; \
+ DST[3] = SRC[3]; \
+} while(0)
+
+#define VEC4_SCALAR(DST, SRC) \
+do { \
+ DST[0] = SRC; \
+ DST[1] = SRC; \
+ DST[2] = SRC; \
+ DST[3] = SRC; \
+} while(0)
+
+#define VEC4_ADD(SUM, A, B) \
+do { \
+ SUM[0] = A[0] + B[0]; \
+ SUM[1] = A[1] + B[1]; \
+ SUM[2] = A[2] + B[2]; \
+ SUM[3] = A[3] + B[3]; \
+} while (0)
+
+#define VEC4_SUB(SUM, A, B) \
+do { \
+ SUM[0] = A[0] - B[0]; \
+ SUM[1] = A[1] - B[1]; \
+ SUM[2] = A[2] - B[2]; \
+ SUM[3] = A[3] - B[3]; \
+} while (0)
+
+#define VEC4_MUL(SUM, A, B) \
+do { \
+ SUM[0] = A[0] * B[0]; \
+ SUM[1] = A[1] * B[1]; \
+ SUM[2] = A[2] * B[2]; \
+ SUM[3] = A[3] * B[3]; \
+} while (0)
+
+#define VEC4_MIN(SUM, A, B) \
+do { \
+ SUM[0] = (A[0] < B[0]) ? A[0] : B[0]; \
+ SUM[1] = (A[1] < B[1]) ? A[1] : B[1]; \
+ SUM[2] = (A[2] < B[2]) ? A[2] : B[2]; \
+ SUM[3] = (A[3] < B[3]) ? A[3] : B[3]; \
+} while (0)
+
+#define VEC4_MAX(SUM, A, B) \
+do { \
+ SUM[0] = (A[0] > B[0]) ? A[0] : B[0]; \
+ SUM[1] = (A[1] > B[1]) ? A[1] : B[1]; \
+ SUM[2] = (A[2] > B[2]) ? A[2] : B[2]; \
+ SUM[3] = (A[3] > B[3]) ? A[3] : B[3]; \
+} while (0)
+
+
+
+static void
+blend_quad(struct quad_stage *qs, struct quad_header *quad)
+{
+ static const GLfloat zero[4] = { 0, 0, 0, 0 };
+ static const GLfloat one[4] = { 1, 1, 1, 1 };
+ struct softpipe_context *softpipe = qs->softpipe;
+ struct softpipe_surface *sps = softpipe_surface(softpipe->cbuf);
+ GLfloat source[4][QUAD_SIZE], dest[4][QUAD_SIZE];
+
+ /* get colors from framebuffer */
+ sps->read_quad_f_swz(sps, quad->x0, quad->y0, dest);
+
+ /*
+ * Compute src/first term RGB
+ */
+ switch (softpipe->blend.rgb_src_factor) {
+ case PIPE_BLENDFACTOR_ONE:
+ VEC4_COPY(source[0], quad->outputs.color[0]); /* R */
+ VEC4_COPY(source[1], quad->outputs.color[1]); /* G */
+ VEC4_COPY(source[2], quad->outputs.color[2]); /* B */
+ break;
+ case PIPE_BLENDFACTOR_SRC_COLOR:
+ VEC4_MUL(source[0], quad->outputs.color[0], quad->outputs.color[0]); /* R */
+ VEC4_MUL(source[1], quad->outputs.color[1], quad->outputs.color[1]); /* G */
+ VEC4_MUL(source[2], quad->outputs.color[2], quad->outputs.color[2]); /* B */
+ break;
+ case PIPE_BLENDFACTOR_SRC_ALPHA:
+ {
+ const GLfloat *alpha = quad->outputs.color[3];
+ VEC4_MUL(source[0], quad->outputs.color[0], alpha); /* R */
+ VEC4_MUL(source[1], quad->outputs.color[1], alpha); /* G */
+ VEC4_MUL(source[2], quad->outputs.color[2], alpha); /* B */
+ }
+ break;
+ case PIPE_BLENDFACTOR_DST_COLOR:
+ VEC4_MUL(source[0], quad->outputs.color[0], dest[0]); /* R */
+ VEC4_MUL(source[1], quad->outputs.color[1], dest[1]); /* G */
+ VEC4_MUL(source[2], quad->outputs.color[2], dest[2]); /* B */
+ break;
+ case PIPE_BLENDFACTOR_DST_ALPHA:
+ {
+ const GLfloat *alpha = dest[3];
+ VEC4_MUL(source[0], quad->outputs.color[0], alpha); /* R */
+ VEC4_MUL(source[1], quad->outputs.color[1], alpha); /* G */
+ VEC4_MUL(source[2], quad->outputs.color[2], alpha); /* B */
+ }
+ break;
+ case PIPE_BLENDFACTOR_SRC_ALPHA_SATURATE:
+ assert(0); /* to do */
+ break;
+ case PIPE_BLENDFACTOR_CONST_COLOR:
+ {
+ GLfloat comp[4];
+ VEC4_SCALAR(comp, softpipe->blend_color.color[0]); /* R */
+ VEC4_MUL(source[0], quad->outputs.color[0], comp); /* R */
+ VEC4_SCALAR(comp, softpipe->blend_color.color[1]); /* G */
+ VEC4_MUL(source[1], quad->outputs.color[1], comp); /* G */
+ VEC4_SCALAR(comp, softpipe->blend_color.color[2]); /* B */
+ VEC4_MUL(source[2], quad->outputs.color[2], comp); /* B */
+ }
+ break;
+ case PIPE_BLENDFACTOR_CONST_ALPHA:
+ {
+ GLfloat alpha[4];
+ VEC4_SCALAR(alpha, softpipe->blend_color.color[3]);
+ VEC4_MUL(source[0], quad->outputs.color[0], alpha); /* R */
+ VEC4_MUL(source[1], quad->outputs.color[1], alpha); /* G */
+ VEC4_MUL(source[2], quad->outputs.color[2], alpha); /* B */
+ }
+ break;
+ case PIPE_BLENDFACTOR_SRC1_COLOR:
+ assert(0); /* to do */
+ break;
+ case PIPE_BLENDFACTOR_SRC1_ALPHA:
+ assert(0); /* to do */
+ break;
+ case PIPE_BLENDFACTOR_ZERO:
+ VEC4_COPY(source[0], zero); /* R */
+ VEC4_COPY(source[1], zero); /* G */
+ VEC4_COPY(source[2], zero); /* B */
+ break;
+ case PIPE_BLENDFACTOR_INV_SRC_COLOR:
+ {
+ GLfloat inv_comp[4];
+ VEC4_SUB(inv_comp, one, quad->outputs.color[0]); /* R */
+ VEC4_MUL(source[0], quad->outputs.color[0], inv_comp); /* R */
+ VEC4_SUB(inv_comp, one, quad->outputs.color[1]); /* G */
+ VEC4_MUL(source[1], quad->outputs.color[1], inv_comp); /* G */
+ VEC4_SUB(inv_comp, one, quad->outputs.color[2]); /* B */
+ VEC4_MUL(source[2], quad->outputs.color[2], inv_comp); /* B */
+ }
+ break;
+ case PIPE_BLENDFACTOR_INV_SRC_ALPHA:
+ {
+ GLfloat inv_alpha[4];
+ VEC4_SUB(inv_alpha, one, quad->outputs.color[3]);
+ VEC4_MUL(source[0], quad->outputs.color[0], inv_alpha); /* R */
+ VEC4_MUL(source[1], quad->outputs.color[1], inv_alpha); /* G */
+ VEC4_MUL(source[2], quad->outputs.color[2], inv_alpha); /* B */
+ }
+ break;
+ case PIPE_BLENDFACTOR_INV_DST_ALPHA:
+ {
+ GLfloat inv_alpha[4];
+ VEC4_SUB(inv_alpha, one, dest[3]);
+ VEC4_MUL(source[0], quad->outputs.color[0], inv_alpha); /* R */
+ VEC4_MUL(source[1], quad->outputs.color[1], inv_alpha); /* G */
+ VEC4_MUL(source[2], quad->outputs.color[2], inv_alpha); /* B */
+ }
+ break;
+ case PIPE_BLENDFACTOR_INV_DST_COLOR:
+ {
+ GLfloat inv_comp[4];
+ VEC4_SUB(inv_comp, one, dest[0]); /* R */
+ VEC4_MUL(source[0], quad->outputs.color[0], inv_comp); /* R */
+ VEC4_SUB(inv_comp, one, dest[1]); /* G */
+ VEC4_MUL(source[1], quad->outputs.color[1], inv_comp); /* G */
+ VEC4_SUB(inv_comp, one, dest[2]); /* B */
+ VEC4_MUL(source[2], quad->outputs.color[2], inv_comp); /* B */
+ }
+ break;
+ case PIPE_BLENDFACTOR_INV_CONST_COLOR:
+ {
+ GLfloat inv_comp[4];
+ /* R */
+ VEC4_SCALAR(inv_comp, 1.0 - softpipe->blend_color.color[0]);
+ VEC4_MUL(source[0], quad->outputs.color[0], inv_comp);
+ /* G */
+ VEC4_SCALAR(inv_comp, 1.0 - softpipe->blend_color.color[1]);
+ VEC4_MUL(source[1], quad->outputs.color[1], inv_comp);
+ /* B */
+ VEC4_SCALAR(inv_comp, 1.0 - softpipe->blend_color.color[2]);
+ VEC4_MUL(source[2], quad->outputs.color[2], inv_comp);
+ }
+ break;
+ case PIPE_BLENDFACTOR_INV_CONST_ALPHA:
+ {
+ GLfloat alpha[4], inv_alpha[4];
+ VEC4_SCALAR(alpha, 1.0 - softpipe->blend_color.color[3]);
+ VEC4_MUL(source[0], quad->outputs.color[0], inv_alpha); /* R */
+ VEC4_MUL(source[1], quad->outputs.color[1], inv_alpha); /* G */
+ VEC4_MUL(source[2], quad->outputs.color[2], inv_alpha); /* B */
+ }
+ break;
+ case PIPE_BLENDFACTOR_INV_SRC1_COLOR:
+ assert(0); /* to do */
+ break;
+ case PIPE_BLENDFACTOR_INV_SRC1_ALPHA:
+ assert(0); /* to do */
+ break;
+ default:
+ abort();
+ }
+
+ /*
+ * Compute src/first term A
+ */
+ switch (softpipe->blend.alpha_src_factor) {
+ case PIPE_BLENDFACTOR_ONE:
+ VEC4_COPY(source[3], quad->outputs.color[3]); /* A */
+ break;
+ case PIPE_BLENDFACTOR_SRC_ALPHA:
+ {
+ const GLfloat *alpha = quad->outputs.color[3];
+ VEC4_MUL(source[3], quad->outputs.color[3], alpha); /* A */
+ }
+ break;
+ case PIPE_BLENDFACTOR_ZERO:
+ VEC4_COPY(source[3], zero); /* A */
+ break;
+ /* XXX fill in remaining terms */
+ default:
+ abort();
+ }
+
+
+ /*
+ * Compute dest/second term RGB
+ */
+ switch (softpipe->blend.rgb_dst_factor) {
+ case PIPE_BLENDFACTOR_ONE:
+ /* dest = dest * 1 NO-OP, leave dest as-is */
+ break;
+ case PIPE_BLENDFACTOR_INV_SRC_ALPHA:
+ {
+ GLfloat one_minus_alpha[QUAD_SIZE];
+ VEC4_SUB(one_minus_alpha, one, quad->outputs.color[3]);
+ VEC4_MUL(dest[0], dest[0], one_minus_alpha); /* R */
+ VEC4_MUL(dest[1], dest[1], one_minus_alpha); /* G */
+ VEC4_MUL(dest[2], dest[2], one_minus_alpha); /* B */
+ }
+ break;
+ case PIPE_BLENDFACTOR_ZERO:
+ VEC4_COPY(dest[0], zero); /* R */
+ VEC4_COPY(dest[1], zero); /* G */
+ VEC4_COPY(dest[2], zero); /* B */
+ break;
+ /* XXX fill in remaining terms */
+ default:
+ abort();
+ }
+
+ /*
+ * Compute dest/second term A
+ */
+ switch (softpipe->blend.alpha_dst_factor) {
+ case PIPE_BLENDFACTOR_ONE:
+ /* dest = dest * 1 NO-OP, leave dest as-is */
+ break;
+ case PIPE_BLENDFACTOR_INV_SRC_ALPHA:
+ {
+ GLfloat one_minus_alpha[QUAD_SIZE];
+ VEC4_SUB(one_minus_alpha, one, quad->outputs.color[3]);
+ VEC4_MUL(dest[3], dest[3], one_minus_alpha); /* A */
+ }
+ break;
+ case PIPE_BLENDFACTOR_ZERO:
+ VEC4_COPY(dest[3], zero); /* A */
+ break;
+ /* XXX fill in remaining terms */
+ default:
+ abort();
+ }
+
+ /*
+ * Combine RGB terms
+ */
+ switch (softpipe->blend.rgb_func) {
+ case PIPE_BLEND_ADD:
+ VEC4_ADD(quad->outputs.color[0], source[0], dest[0]); /* R */
+ VEC4_ADD(quad->outputs.color[1], source[1], dest[1]); /* G */
+ VEC4_ADD(quad->outputs.color[2], source[2], dest[2]); /* B */
+ break;
+ case PIPE_BLEND_SUBTRACT:
+ VEC4_SUB(quad->outputs.color[0], source[0], dest[0]); /* R */
+ VEC4_SUB(quad->outputs.color[1], source[1], dest[1]); /* G */
+ VEC4_SUB(quad->outputs.color[2], source[2], dest[2]); /* B */
+ break;
+ case PIPE_BLEND_REVERSE_SUBTRACT:
+ VEC4_SUB(quad->outputs.color[0], dest[0], source[0]); /* R */
+ VEC4_SUB(quad->outputs.color[1], dest[1], source[1]); /* G */
+ VEC4_SUB(quad->outputs.color[2], dest[2], source[2]); /* B */
+ break;
+ case PIPE_BLEND_MIN:
+ VEC4_MIN(quad->outputs.color[0], source[0], dest[0]); /* R */
+ VEC4_MIN(quad->outputs.color[1], source[1], dest[1]); /* G */
+ VEC4_MIN(quad->outputs.color[2], source[2], dest[2]); /* B */
+ break;
+ case PIPE_BLEND_MAX:
+ VEC4_MAX(quad->outputs.color[0], source[0], dest[0]); /* R */
+ VEC4_MAX(quad->outputs.color[1], source[1], dest[1]); /* G */
+ VEC4_MAX(quad->outputs.color[2], source[2], dest[2]); /* B */
+ break;
+ default:
+ abort();
+ }
+
+ /*
+ * Combine A terms
+ */
+ switch (softpipe->blend.alpha_func) {
+ case PIPE_BLEND_ADD:
+ VEC4_ADD(quad->outputs.color[3], source[3], dest[3]); /* A */
+ break;
+ case PIPE_BLEND_SUBTRACT:
+ VEC4_SUB(quad->outputs.color[3], source[3], dest[3]); /* A */
+ break;
+ case PIPE_BLEND_REVERSE_SUBTRACT:
+ VEC4_SUB(quad->outputs.color[3], dest[3], source[3]); /* A */
+ break;
+ case PIPE_BLEND_MIN:
+ VEC4_MIN(quad->outputs.color[3], source[3], dest[3]); /* A */
+ break;
+ case PIPE_BLEND_MAX:
+ VEC4_MAX(quad->outputs.color[3], source[3], dest[3]); /* A */
+ default:
+ abort();
+ }
+
+ /* pass blended quad to next stage */
+ qs->next->run(qs->next, quad);
+}
+
+
+
+
+struct quad_stage *sp_quad_blend_stage( struct softpipe_context *softpipe )
+{
+ struct quad_stage *stage = CALLOC_STRUCT(quad_stage);
+
+ stage->softpipe = softpipe;
+ stage->run = blend_quad;
+
+ return stage;
+}
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