1/*
2 * Copyright 2015 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8#include "src/gpu/glsl/GrGLSLBlend.h"
9#include "src/gpu/glsl/GrGLSLFragmentShaderBuilder.h"
10#include "src/gpu/glsl/GrGLSLProgramBuilder.h"
11
12namespace GrGLSLBlend {
13
14const char* BlendFuncName(SkBlendMode mode) {
15 switch (mode) {
16 case SkBlendMode::kClear: return "blend_clear";
17 case SkBlendMode::kSrc: return "blend_src";
18 case SkBlendMode::kDst: return "blend_dst";
19 case SkBlendMode::kSrcOver: return "blend_src_over";
20 case SkBlendMode::kDstOver: return "blend_dst_over";
21 case SkBlendMode::kSrcIn: return "blend_src_in";
22 case SkBlendMode::kDstIn: return "blend_dst_in";
23 case SkBlendMode::kSrcOut: return "blend_src_out";
24 case SkBlendMode::kDstOut: return "blend_dst_out";
25 case SkBlendMode::kSrcATop: return "blend_src_atop";
26 case SkBlendMode::kDstATop: return "blend_dst_atop";
27 case SkBlendMode::kXor: return "blend_xor";
28 case SkBlendMode::kPlus: return "blend_plus";
29 case SkBlendMode::kModulate: return "blend_modulate";
30 case SkBlendMode::kScreen: return "blend_screen";
31 case SkBlendMode::kOverlay: return "blend_overlay";
32 case SkBlendMode::kDarken: return "blend_darken";
33 case SkBlendMode::kLighten: return "blend_lighten";
34 case SkBlendMode::kColorDodge: return "blend_color_dodge";
35 case SkBlendMode::kColorBurn: return "blend_color_burn";
36 case SkBlendMode::kHardLight: return "blend_hard_light";
37 case SkBlendMode::kSoftLight: return "blend_soft_light";
38 case SkBlendMode::kDifference: return "blend_difference";
39 case SkBlendMode::kExclusion: return "blend_exclusion";
40 case SkBlendMode::kMultiply: return "blend_multiply";
41 case SkBlendMode::kHue: return "blend_hue";
42 case SkBlendMode::kSaturation: return "blend_saturation";
43 case SkBlendMode::kColor: return "blend_color";
44 case SkBlendMode::kLuminosity: return "blend_luminosity";
45 }
46 SkUNREACHABLE;
47}
48
49void AppendMode(GrGLSLFragmentBuilder* fsBuilder,
50 const char* srcColor,
51 const char* dstColor,
52 const char* outColor,
53 SkBlendMode mode) {
54 fsBuilder->codeAppendf("%s = %s(%s, %s);", outColor, BlendFuncName(mode), srcColor, dstColor);
55}
56
57} // namespace GrGLSLBlend
58