Blend functions as SkSL built ins.
GPU-only for right now. Use in GrGLSLBlend::AppendMode. Remove unused GrGLSLBlend::AppendRegionOp. Change-Id: I23affe255a1adafa55f3a07ca6291dc84e18e213 Reviewed-on: https://skia-review.googlesource.com/c/skia/+/254678 Reviewed-by: Ethan Nicholas <ethannicholas@google.com> Reviewed-by: Brian Osman <brianosman@google.com> Commit-Queue: Brian Salomon <bsalomon@google.com>
This commit is contained in:
Brian Salomon
Skia Commit-Bot
parent
1a372c3038
commit
3794db84e1
@ -9,501 +9,42 @@
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#include "src/gpu/glsl/GrGLSLFragmentShaderBuilder.h"
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#include "src/gpu/glsl/GrGLSLFragmentShaderBuilder.h"
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#include "src/gpu/glsl/GrGLSLProgramBuilder.h"
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#include "src/gpu/glsl/GrGLSLProgramBuilder.h"
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//////////////////////////////////////////////////////////////////////////////
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// Advanced (non-coeff) blend helpers
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//////////////////////////////////////////////////////////////////////////////
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static void hard_light(GrGLSLFragmentBuilder* fsBuilder,
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const char* final,
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const char* src,
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const char* dst) {
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static const char kComponents[] = { 'r', 'g', 'b' };
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for (size_t i = 0; i < SK_ARRAY_COUNT(kComponents); ++i) {
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char component = kComponents[i];
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fsBuilder->codeAppendf("if (2.0 * %s.%c <= %s.a) {", src, component, src);
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fsBuilder->codeAppendf("%s.%c = 2.0 * %s.%c * %s.%c;",
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final, component, src, component, dst, component);
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fsBuilder->codeAppend("} else {");
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fsBuilder->codeAppendf("%s.%c = %s.a * %s.a - 2.0 * (%s.a - %s.%c) * (%s.a - %s.%c);",
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final, component, src, dst, dst, dst, component, src, src,
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component);
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fsBuilder->codeAppend("}");
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}
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fsBuilder->codeAppendf("%s.rgb += %s.rgb * (1.0 - %s.a) + %s.rgb * (1.0 - %s.a);",
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final, src, dst, dst, src);
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}
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// Does one component of color-dodge
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static void color_dodge_component(GrGLSLFragmentBuilder* fsBuilder,
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const char* final,
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const char* src,
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const char* dst,
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const char component) {
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const char* divisorGuard = "";
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const GrShaderCaps* shaderCaps = fsBuilder->getProgramBuilder()->shaderCaps();
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if (shaderCaps->mustGuardDivisionEvenAfterExplicitZeroCheck()) {
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divisorGuard = "+ 0.00000001";
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}
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fsBuilder->codeAppendf("if (0.0 == %s.%c) {", dst, component);
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fsBuilder->codeAppendf("%s.%c = %s.%c * (1.0 - %s.a);",
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final, component, src, component, dst);
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fsBuilder->codeAppend("} else {");
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fsBuilder->codeAppendf("half d = %s.a - %s.%c;", src, src, component);
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fsBuilder->codeAppend("if (0.0 == d) {");
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fsBuilder->codeAppendf("%s.%c = %s.a * %s.a + %s.%c * (1.0 - %s.a) + %s.%c * (1.0 - %s.a);",
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final, component, src, dst, src, component, dst, dst, component,
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src);
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fsBuilder->codeAppend("} else {");
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fsBuilder->codeAppendf("d = min(%s.a, %s.%c * %s.a / (d %s));",
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dst, dst, component, src, divisorGuard);
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fsBuilder->codeAppendf("%s.%c = d * %s.a + %s.%c * (1.0 - %s.a) + %s.%c * (1.0 - %s.a);",
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final, component, src, src, component, dst, dst, component, src);
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fsBuilder->codeAppend("}");
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fsBuilder->codeAppend("}");
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}
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// Does one component of color-burn
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static void color_burn_component(GrGLSLFragmentBuilder* fsBuilder,
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const char* final,
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const char* src,
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const char* dst,
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const char component) {
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const char* divisorGuard = "";
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const GrShaderCaps* shaderCaps = fsBuilder->getProgramBuilder()->shaderCaps();
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if (shaderCaps->mustGuardDivisionEvenAfterExplicitZeroCheck()) {
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divisorGuard = "+ 0.00000001";
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}
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fsBuilder->codeAppendf("if (%s.a == %s.%c) {", dst, dst, component);
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fsBuilder->codeAppendf("%s.%c = %s.a * %s.a + %s.%c * (1.0 - %s.a) + %s.%c * (1.0 - %s.a);",
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final, component, src, dst, src, component, dst, dst, component,
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src);
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fsBuilder->codeAppendf("} else if (0.0 == %s.%c) {", src, component);
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fsBuilder->codeAppendf("%s.%c = %s.%c * (1.0 - %s.a);",
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final, component, dst, component, src);
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fsBuilder->codeAppend("} else {");
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fsBuilder->codeAppendf("half d = max(0.0, %s.a - (%s.a - %s.%c) * %s.a / (%s.%c %s));",
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dst, dst, dst, component, src, src, component, divisorGuard);
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fsBuilder->codeAppendf("%s.%c = %s.a * d + %s.%c * (1.0 - %s.a) + %s.%c * (1.0 - %s.a);",
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final, component, src, src, component, dst, dst, component, src);
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fsBuilder->codeAppend("}");
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}
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// Does one component of soft-light. Caller should have already checked that dst alpha > 0.
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static void soft_light_component_pos_dst_alpha(GrGLSLFragmentBuilder* fsBuilder,
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const char* final,
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const char* src,
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const char* dst,
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const char component) {
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const char* divisorGuard = "";
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const GrShaderCaps* shaderCaps = fsBuilder->getProgramBuilder()->shaderCaps();
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if (shaderCaps->mustGuardDivisionEvenAfterExplicitZeroCheck()) {
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divisorGuard = "+ 0.00000001";
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}
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// if (2S < Sa)
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fsBuilder->codeAppendf("if (2.0 * %s.%c <= %s.a) {", src, component, src);
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// (D^2 (Sa-2 S))/Da+(1-Da) S+D (-Sa+2 S+1)
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fsBuilder->codeAppendf("%s.%c = (%s.%c*%s.%c*(%s.a - 2.0*%s.%c)) / (%s.a %s) +"
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"(1.0 - %s.a) * %s.%c + %s.%c*(-%s.a + 2.0*%s.%c + 1.0);",
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final, component, dst, component, dst, component, src, src,
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component, dst, divisorGuard, dst, src, component, dst, component, src,
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src, component);
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// else if (4D < Da)
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fsBuilder->codeAppendf("} else if (4.0 * %s.%c <= %s.a) {",
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dst, component, dst);
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fsBuilder->codeAppendf("half DSqd = %s.%c * %s.%c;",
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dst, component, dst, component);
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fsBuilder->codeAppendf("half DCub = DSqd * %s.%c;", dst, component);
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fsBuilder->codeAppendf("half DaSqd = %s.a * %s.a;", dst, dst);
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fsBuilder->codeAppendf("half DaCub = DaSqd * %s.a;", dst);
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// (Da^3 (-S)+Da^2 (S-D (3 Sa-6 S-1))+12 Da D^2 (Sa-2 S)-16 D^3 (Sa-2 S))/Da^2
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fsBuilder->codeAppendf("%s.%c ="
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"(DaSqd*(%s.%c - %s.%c * (3.0*%s.a - 6.0*%s.%c - 1.0)) +"
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" 12.0*%s.a*DSqd*(%s.a - 2.0*%s.%c) - 16.0*DCub * (%s.a - 2.0*%s.%c) -"
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" DaCub*%s.%c) / (DaSqd %s);",
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final, component, src, component, dst, component,
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src, src, component, dst, src, src, component, src, src,
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component, src, component, divisorGuard);
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fsBuilder->codeAppendf("} else {");
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// -sqrt(Da * D) (Sa-2 S)-Da S+D (Sa-2 S+1)+S
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fsBuilder->codeAppendf("%s.%c = %s.%c*(%s.a - 2.0*%s.%c + 1.0) + %s.%c -"
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" sqrt(%s.a*%s.%c)*(%s.a - 2.0*%s.%c) - %s.a*%s.%c;",
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final, component, dst, component, src, src, component, src, component,
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dst, dst, component, src, src, component, dst, src, component);
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fsBuilder->codeAppendf("}");
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}
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// Adds a function that takes two colors and an alpha as input. It produces a color with the
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// hue and saturation of the first color, the luminosity of the second color, and the input
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// alpha. It has this signature:
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// float3 set_luminance(float3 hueSatColor, float alpha, float3 lumColor).
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static void add_lum_function(GrGLSLFragmentBuilder* fsBuilder, SkString* setLumFunction) {
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// Emit a helper that gets the luminance of a color.
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SkString getFunction;
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GrShaderVar getLumArgs[] = {
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GrShaderVar("color", kHalf3_GrSLType),
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};
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SkString getLumBody("return dot(half3(0.3, 0.59, 0.11), color);");
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fsBuilder->emitFunction(kHalf_GrSLType,
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"luminance",
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SK_ARRAY_COUNT(getLumArgs), getLumArgs,
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getLumBody.c_str(),
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&getFunction);
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// Emit the set luminance function.
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GrShaderVar setLumArgs[] = {
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GrShaderVar("hueSat", kHalf3_GrSLType),
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GrShaderVar("alpha", kHalf_GrSLType),
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GrShaderVar("lumColor", kHalf3_GrSLType),
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};
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SkString setLumBody;
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setLumBody.printf("half outLum = %s(lumColor);", getFunction.c_str());
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setLumBody.appendf("half3 outColor = outLum - %s(hueSat) + hueSat;", getFunction.c_str());
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setLumBody.append("half minComp = min(min(outColor.r, outColor.g), outColor.b);"
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"half maxComp = max(max(outColor.r, outColor.g), outColor.b);"
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"if (minComp < 0.0 && outLum != minComp) {"
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"outColor = outLum + ((outColor - half3(outLum, outLum, outLum)) * outLum) /"
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"(outLum - minComp);"
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"}"
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"if (maxComp > alpha && maxComp != outLum) {"
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"outColor = outLum +"
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"((outColor - half3(outLum, outLum, outLum)) * (alpha - outLum)) /"
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"(maxComp - outLum);"
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"}"
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"return outColor;");
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fsBuilder->emitFunction(kHalf3_GrSLType,
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"set_luminance",
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SK_ARRAY_COUNT(setLumArgs), setLumArgs,
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setLumBody.c_str(),
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setLumFunction);
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}
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// Adds a function that creates a color with the hue and luminosity of one input color and
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// the saturation of another color. It will have this signature:
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// float set_saturation(float3 hueLumColor, float3 satColor)
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static void add_sat_function(GrGLSLFragmentBuilder* fsBuilder, SkString* setSatFunction) {
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// Emit a helper that gets the saturation of a color
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SkString getFunction;
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GrShaderVar getSatArgs[] = { GrShaderVar("color", kHalf3_GrSLType) };
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SkString getSatBody;
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getSatBody.printf("return max(max(color.r, color.g), color.b) - "
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"min(min(color.r, color.g), color.b);");
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fsBuilder->emitFunction(kHalf_GrSLType,
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"saturation",
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SK_ARRAY_COUNT(getSatArgs), getSatArgs,
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getSatBody.c_str(),
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&getFunction);
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// Emit a helper that sets the saturation given sorted input channels. This used
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// to use inout params for min, mid, and max components but that seems to cause
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// problems on PowerVR drivers. So instead it returns a float3 where r, g ,b are the
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// adjusted min, mid, and max inputs, respectively.
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SkString helperFunction;
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GrShaderVar helperArgs[] = {
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GrShaderVar("minComp", kHalf_GrSLType),
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GrShaderVar("midComp", kHalf_GrSLType),
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GrShaderVar("maxComp", kHalf_GrSLType),
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GrShaderVar("sat", kHalf_GrSLType),
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};
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static const char kHelperBody[] = "if (minComp < maxComp) {"
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"half3 result;"
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"result.r = 0.0;"
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"result.g = sat * (midComp - minComp) / (maxComp - minComp);"
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"result.b = sat;"
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"return result;"
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"} else {"
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"return half3(0, 0, 0);"
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"}";
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fsBuilder->emitFunction(kHalf3_GrSLType,
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"set_saturation_helper",
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SK_ARRAY_COUNT(helperArgs), helperArgs,
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kHelperBody,
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&helperFunction);
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GrShaderVar setSatArgs[] = {
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GrShaderVar("hueLumColor", kHalf3_GrSLType),
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GrShaderVar("satColor", kHalf3_GrSLType),
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};
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const char* helpFunc = helperFunction.c_str();
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SkString setSatBody;
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setSatBody.appendf("half sat = %s(satColor);"
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"if (hueLumColor.r <= hueLumColor.g) {"
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"if (hueLumColor.g <= hueLumColor.b) {"
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"hueLumColor.rgb = %s(hueLumColor.r, hueLumColor.g, hueLumColor.b, sat);"
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"} else if (hueLumColor.r <= hueLumColor.b) {"
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"hueLumColor.rbg = %s(hueLumColor.r, hueLumColor.b, hueLumColor.g, sat);"
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"} else {"
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"hueLumColor.brg = %s(hueLumColor.b, hueLumColor.r, hueLumColor.g, sat);"
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"}"
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"} else if (hueLumColor.r <= hueLumColor.b) {"
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"hueLumColor.grb = %s(hueLumColor.g, hueLumColor.r, hueLumColor.b, sat);"
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"} else if (hueLumColor.g <= hueLumColor.b) {"
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"hueLumColor.gbr = %s(hueLumColor.g, hueLumColor.b, hueLumColor.r, sat);"
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"} else {"
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"hueLumColor.bgr = %s(hueLumColor.b, hueLumColor.g, hueLumColor.r, sat);"
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"}"
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"return hueLumColor;",
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getFunction.c_str(), helpFunc, helpFunc, helpFunc, helpFunc,
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helpFunc, helpFunc);
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fsBuilder->emitFunction(kHalf3_GrSLType,
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"set_saturation",
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SK_ARRAY_COUNT(setSatArgs), setSatArgs,
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setSatBody.c_str(),
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setSatFunction);
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}
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static void emit_advanced_xfermode_code(GrGLSLFragmentBuilder* fsBuilder, const char* srcColor,
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const char* dstColor, const char* outputColor,
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SkBlendMode mode) {
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SkASSERT(srcColor);
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SkASSERT(dstColor);
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SkASSERT(outputColor);
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// These all perform src-over on the alpha channel.
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fsBuilder->codeAppendf("%s.a = %s.a + (1.0 - %s.a) * %s.a;",
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outputColor, srcColor, srcColor, dstColor);
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switch (mode) {
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case SkBlendMode::kOverlay:
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// Overlay is Hard-Light with the src and dst reversed
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hard_light(fsBuilder, outputColor, dstColor, srcColor);
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break;
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case SkBlendMode::kDarken:
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fsBuilder->codeAppendf("%s.rgb = min((1.0 - %s.a) * %s.rgb + %s.rgb, "
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"(1.0 - %s.a) * %s.rgb + %s.rgb);",
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outputColor,
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srcColor, dstColor, srcColor,
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dstColor, srcColor, dstColor);
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break;
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case SkBlendMode::kLighten:
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fsBuilder->codeAppendf("%s.rgb = max((1.0 - %s.a) * %s.rgb + %s.rgb, "
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"(1.0 - %s.a) * %s.rgb + %s.rgb);",
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outputColor,
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srcColor, dstColor, srcColor,
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dstColor, srcColor, dstColor);
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break;
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case SkBlendMode::kColorDodge:
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color_dodge_component(fsBuilder, outputColor, srcColor, dstColor, 'r');
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color_dodge_component(fsBuilder, outputColor, srcColor, dstColor, 'g');
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color_dodge_component(fsBuilder, outputColor, srcColor, dstColor, 'b');
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break;
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case SkBlendMode::kColorBurn:
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color_burn_component(fsBuilder, outputColor, srcColor, dstColor, 'r');
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color_burn_component(fsBuilder, outputColor, srcColor, dstColor, 'g');
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color_burn_component(fsBuilder, outputColor, srcColor, dstColor, 'b');
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break;
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case SkBlendMode::kHardLight:
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hard_light(fsBuilder, outputColor, srcColor, dstColor);
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break;
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case SkBlendMode::kSoftLight:
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fsBuilder->codeAppendf("if (0.0 == %s.a) {", dstColor);
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||||||
fsBuilder->codeAppendf("%s.rgba = %s;", outputColor, srcColor);
|
|
||||||
fsBuilder->codeAppendf("} else {");
|
|
||||||
soft_light_component_pos_dst_alpha(fsBuilder, outputColor, srcColor, dstColor, 'r');
|
|
||||||
soft_light_component_pos_dst_alpha(fsBuilder, outputColor, srcColor, dstColor, 'g');
|
|
||||||
soft_light_component_pos_dst_alpha(fsBuilder, outputColor, srcColor, dstColor, 'b');
|
|
||||||
fsBuilder->codeAppendf("}");
|
|
||||||
break;
|
|
||||||
case SkBlendMode::kDifference:
|
|
||||||
fsBuilder->codeAppendf("%s.rgb = %s.rgb + %s.rgb -"
|
|
||||||
"2.0 * min(%s.rgb * %s.a, %s.rgb * %s.a);",
|
|
||||||
outputColor, srcColor, dstColor, srcColor, dstColor,
|
|
||||||
dstColor, srcColor);
|
|
||||||
break;
|
|
||||||
case SkBlendMode::kExclusion:
|
|
||||||
fsBuilder->codeAppendf("%s.rgb = %s.rgb + %s.rgb - "
|
|
||||||
"2.0 * %s.rgb * %s.rgb;",
|
|
||||||
outputColor, dstColor, srcColor, dstColor, srcColor);
|
|
||||||
break;
|
|
||||||
case SkBlendMode::kMultiply:
|
|
||||||
fsBuilder->codeAppendf("%s.rgb = (1.0 - %s.a) * %s.rgb + "
|
|
||||||
"(1.0 - %s.a) * %s.rgb + "
|
|
||||||
"%s.rgb * %s.rgb;",
|
|
||||||
outputColor, srcColor, dstColor, dstColor, srcColor,
|
|
||||||
srcColor, dstColor);
|
|
||||||
break;
|
|
||||||
case SkBlendMode::kHue: {
|
|
||||||
// SetLum(SetSat(S * Da, Sat(D * Sa)), Sa*Da, D*Sa) + (1 - Sa) * D + (1 - Da) * S
|
|
||||||
SkString setSat, setLum;
|
|
||||||
add_sat_function(fsBuilder, &setSat);
|
|
||||||
add_lum_function(fsBuilder, &setLum);
|
|
||||||
fsBuilder->codeAppendf("half4 dstSrcAlpha = %s * %s.a;",
|
|
||||||
dstColor, srcColor);
|
|
||||||
fsBuilder->codeAppendf("%s.rgb = %s(%s(%s.rgb * %s.a, dstSrcAlpha.rgb),"
|
|
||||||
"dstSrcAlpha.a, dstSrcAlpha.rgb);",
|
|
||||||
outputColor, setLum.c_str(), setSat.c_str(), srcColor,
|
|
||||||
dstColor);
|
|
||||||
fsBuilder->codeAppendf("%s.rgb += (1.0 - %s.a) * %s.rgb + (1.0 - %s.a) * %s.rgb;",
|
|
||||||
outputColor, srcColor, dstColor, dstColor, srcColor);
|
|
||||||
break;
|
|
||||||
}
|
|
||||||
case SkBlendMode::kSaturation: {
|
|
||||||
// SetLum(SetSat(D * Sa, Sat(S * Da)), Sa*Da, D*Sa)) + (1 - Sa) * D + (1 - Da) * S
|
|
||||||
SkString setSat, setLum;
|
|
||||||
add_sat_function(fsBuilder, &setSat);
|
|
||||||
add_lum_function(fsBuilder, &setLum);
|
|
||||||
fsBuilder->codeAppendf("half4 dstSrcAlpha = %s * %s.a;",
|
|
||||||
dstColor, srcColor);
|
|
||||||
fsBuilder->codeAppendf("%s.rgb = %s(%s(dstSrcAlpha.rgb, %s.rgb * %s.a),"
|
|
||||||
"dstSrcAlpha.a, dstSrcAlpha.rgb);",
|
|
||||||
outputColor, setLum.c_str(), setSat.c_str(), srcColor,
|
|
||||||
dstColor);
|
|
||||||
fsBuilder->codeAppendf("%s.rgb += (1.0 - %s.a) * %s.rgb + (1.0 - %s.a) * %s.rgb;",
|
|
||||||
outputColor, srcColor, dstColor, dstColor, srcColor);
|
|
||||||
break;
|
|
||||||
}
|
|
||||||
case SkBlendMode::kColor: {
|
|
||||||
// SetLum(S * Da, Sa* Da, D * Sa) + (1 - Sa) * D + (1 - Da) * S
|
|
||||||
SkString setLum;
|
|
||||||
add_lum_function(fsBuilder, &setLum);
|
|
||||||
fsBuilder->codeAppendf("half4 srcDstAlpha = %s * %s.a;",
|
|
||||||
srcColor, dstColor);
|
|
||||||
fsBuilder->codeAppendf("%s.rgb = %s(srcDstAlpha.rgb, srcDstAlpha.a, %s.rgb * %s.a);",
|
|
||||||
outputColor, setLum.c_str(), dstColor, srcColor);
|
|
||||||
fsBuilder->codeAppendf("%s.rgb += (1.0 - %s.a) * %s.rgb + (1.0 - %s.a) * %s.rgb;",
|
|
||||||
outputColor, srcColor, dstColor, dstColor, srcColor);
|
|
||||||
break;
|
|
||||||
}
|
|
||||||
case SkBlendMode::kLuminosity: {
|
|
||||||
// SetLum(D * Sa, Sa* Da, S * Da) + (1 - Sa) * D + (1 - Da) * S
|
|
||||||
SkString setLum;
|
|
||||||
add_lum_function(fsBuilder, &setLum);
|
|
||||||
fsBuilder->codeAppendf("half4 srcDstAlpha = %s * %s.a;",
|
|
||||||
srcColor, dstColor);
|
|
||||||
fsBuilder->codeAppendf("%s.rgb = %s(%s.rgb * %s.a, srcDstAlpha.a, srcDstAlpha.rgb);",
|
|
||||||
outputColor, setLum.c_str(), dstColor, srcColor);
|
|
||||||
fsBuilder->codeAppendf("%s.rgb += (1.0 - %s.a) * %s.rgb + (1.0 - %s.a) * %s.rgb;",
|
|
||||||
outputColor, srcColor, dstColor, dstColor, srcColor);
|
|
||||||
break;
|
|
||||||
}
|
|
||||||
default:
|
|
||||||
SK_ABORT("Unknown Custom Xfer mode.");
|
|
||||||
break;
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
//////////////////////////////////////////////////////////////////////////////
|
|
||||||
// Porter-Duff blend helper
|
|
||||||
//////////////////////////////////////////////////////////////////////////////
|
|
||||||
|
|
||||||
static bool append_porterduff_term(GrGLSLFragmentBuilder* fsBuilder, SkBlendModeCoeff coeff,
|
|
||||||
const char* colorName, const char* srcColorName,
|
|
||||||
const char* dstColorName, bool hasPrevious) {
|
|
||||||
if (SkBlendModeCoeff::kZero == coeff) {
|
|
||||||
return hasPrevious;
|
|
||||||
} else {
|
|
||||||
if (hasPrevious) {
|
|
||||||
fsBuilder->codeAppend(" + ");
|
|
||||||
}
|
|
||||||
fsBuilder->codeAppendf("%s", colorName);
|
|
||||||
switch (coeff) {
|
|
||||||
case SkBlendModeCoeff::kOne:
|
|
||||||
break;
|
|
||||||
case SkBlendModeCoeff::kSC:
|
|
||||||
fsBuilder->codeAppendf(" * %s", srcColorName);
|
|
||||||
break;
|
|
||||||
case SkBlendModeCoeff::kISC:
|
|
||||||
fsBuilder->codeAppendf(" * (half4(1.0) - %s)", srcColorName);
|
|
||||||
break;
|
|
||||||
case SkBlendModeCoeff::kDC:
|
|
||||||
fsBuilder->codeAppendf(" * %s", dstColorName);
|
|
||||||
break;
|
|
||||||
case SkBlendModeCoeff::kIDC:
|
|
||||||
fsBuilder->codeAppendf(" * (half4(1.0) - %s)", dstColorName);
|
|
||||||
break;
|
|
||||||
case SkBlendModeCoeff::kSA:
|
|
||||||
fsBuilder->codeAppendf(" * %s.a", srcColorName);
|
|
||||||
break;
|
|
||||||
case SkBlendModeCoeff::kISA:
|
|
||||||
fsBuilder->codeAppendf(" * (1.0 - %s.a)", srcColorName);
|
|
||||||
break;
|
|
||||||
case SkBlendModeCoeff::kDA:
|
|
||||||
fsBuilder->codeAppendf(" * %s.a", dstColorName);
|
|
||||||
break;
|
|
||||||
case SkBlendModeCoeff::kIDA:
|
|
||||||
fsBuilder->codeAppendf(" * (1.0 - %s.a)", dstColorName);
|
|
||||||
break;
|
|
||||||
default:
|
|
||||||
SK_ABORT("Unsupported Blend Coeff");
|
|
||||||
}
|
|
||||||
return true;
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
//////////////////////////////////////////////////////////////////////////////
|
|
||||||
|
|
||||||
void GrGLSLBlend::AppendMode(GrGLSLFragmentBuilder* fsBuilder, const char* srcColor,
|
void GrGLSLBlend::AppendMode(GrGLSLFragmentBuilder* fsBuilder, const char* srcColor,
|
||||||
const char* dstColor, const char* outColor,
|
const char* dstColor, const char* outColor,
|
||||||
SkBlendMode mode) {
|
SkBlendMode mode) {
|
||||||
|
// When and if the SkSL compiler supports inlining we could replace this with
|
||||||
SkBlendModeCoeff srcCoeff, dstCoeff;
|
// out = blend(mode, src, dst) where mode is a literal.
|
||||||
if (SkBlendMode_AsCoeff(mode, &srcCoeff, &dstCoeff)) {
|
const char* name;
|
||||||
// The only coeff mode that can go out of range is plus.
|
switch (mode) {
|
||||||
bool clamp = mode == SkBlendMode::kPlus;
|
case SkBlendMode::kClear: name = "clear"; break;
|
||||||
|
case SkBlendMode::kSrc: name = "src"; break;
|
||||||
fsBuilder->codeAppendf("%s = ", outColor);
|
case SkBlendMode::kDst: name = "dst"; break;
|
||||||
if (clamp) {
|
case SkBlendMode::kSrcOver: name = "src_over"; break;
|
||||||
fsBuilder->codeAppend("clamp(");
|
case SkBlendMode::kDstOver: name = "dst_over"; break;
|
||||||
}
|
case SkBlendMode::kSrcIn: name = "src_in"; break;
|
||||||
// append src blend
|
case SkBlendMode::kDstIn: name = "dst_in"; break;
|
||||||
bool didAppend = append_porterduff_term(fsBuilder, srcCoeff, srcColor, srcColor, dstColor,
|
case SkBlendMode::kSrcOut: name = "src_out"; break;
|
||||||
false);
|
case SkBlendMode::kDstOut: name = "dst_out"; break;
|
||||||
// append dst blend
|
case SkBlendMode::kSrcATop: name = "src_atop"; break;
|
||||||
if(!append_porterduff_term(fsBuilder, dstCoeff, dstColor, srcColor, dstColor, didAppend)) {
|
case SkBlendMode::kDstATop: name = "dst_atop"; break;
|
||||||
fsBuilder->codeAppend("half4(0, 0, 0, 0)");
|
case SkBlendMode::kXor: name = "xor"; break;
|
||||||
}
|
case SkBlendMode::kPlus: name = "plus"; break;
|
||||||
if (clamp) {
|
case SkBlendMode::kModulate: name = "modulate"; break;
|
||||||
fsBuilder->codeAppend(", 0, 1);");
|
case SkBlendMode::kScreen: name = "screen"; break;
|
||||||
}
|
case SkBlendMode::kOverlay: name = "overlay"; break;
|
||||||
fsBuilder->codeAppend(";");
|
case SkBlendMode::kDarken: name = "darken"; break;
|
||||||
} else {
|
case SkBlendMode::kLighten: name = "lighten"; break;
|
||||||
emit_advanced_xfermode_code(fsBuilder, srcColor, dstColor, outColor, mode);
|
case SkBlendMode::kColorDodge: name = "color_dodge"; break;
|
||||||
|
case SkBlendMode::kColorBurn: name = "color_burn"; break;
|
||||||
|
case SkBlendMode::kHardLight: name = "hard_light"; break;
|
||||||
|
case SkBlendMode::kSoftLight: name = "soft_light"; break;
|
||||||
|
case SkBlendMode::kDifference: name = "difference"; break;
|
||||||
|
case SkBlendMode::kExclusion: name = "exclusion"; break;
|
||||||
|
case SkBlendMode::kMultiply: name = "multiply"; break;
|
||||||
|
case SkBlendMode::kHue: name = "hue"; break;
|
||||||
|
case SkBlendMode::kSaturation: name = "saturation"; break;
|
||||||
|
case SkBlendMode::kColor: name = "color"; break;
|
||||||
|
case SkBlendMode::kLuminosity: name = "luminosity"; break;
|
||||||
}
|
}
|
||||||
}
|
fsBuilder->codeAppendf("%s = blend_%s(%s, %s);", outColor, name, srcColor, dstColor);
|
||||||
|
|
||||||
void GrGLSLBlend::AppendRegionOp(GrGLSLFragmentBuilder* fsBuilder, const char* srcColor,
|
|
||||||
const char* dstColor, const char* outColor,
|
|
||||||
SkRegion::Op regionOp) {
|
|
||||||
SkBlendModeCoeff srcCoeff, dstCoeff;
|
|
||||||
switch (regionOp) {
|
|
||||||
case SkRegion::kReplace_Op:
|
|
||||||
srcCoeff = SkBlendModeCoeff::kOne;
|
|
||||||
dstCoeff = SkBlendModeCoeff::kZero;
|
|
||||||
break;
|
|
||||||
case SkRegion::kIntersect_Op:
|
|
||||||
srcCoeff = SkBlendModeCoeff::kDC;
|
|
||||||
dstCoeff = SkBlendModeCoeff::kZero;
|
|
||||||
break;
|
|
||||||
case SkRegion::kUnion_Op:
|
|
||||||
srcCoeff = SkBlendModeCoeff::kOne;
|
|
||||||
dstCoeff = SkBlendModeCoeff::kISC;
|
|
||||||
break;
|
|
||||||
case SkRegion::kXOR_Op:
|
|
||||||
srcCoeff = SkBlendModeCoeff::kIDC;
|
|
||||||
dstCoeff = SkBlendModeCoeff::kISC;
|
|
||||||
break;
|
|
||||||
case SkRegion::kDifference_Op:
|
|
||||||
srcCoeff = SkBlendModeCoeff::kZero;
|
|
||||||
dstCoeff = SkBlendModeCoeff::kISC;
|
|
||||||
break;
|
|
||||||
case SkRegion::kReverseDifference_Op:
|
|
||||||
srcCoeff = SkBlendModeCoeff::kIDC;
|
|
||||||
dstCoeff = SkBlendModeCoeff::kZero;
|
|
||||||
break;
|
|
||||||
default:
|
|
||||||
SK_ABORT("Unsupported Op");
|
|
||||||
// We should never get here but to make compiler happy
|
|
||||||
srcCoeff = SkBlendModeCoeff::kZero;
|
|
||||||
dstCoeff = SkBlendModeCoeff::kZero;
|
|
||||||
}
|
|
||||||
fsBuilder->codeAppendf("%s = ", outColor);
|
|
||||||
// append src blend
|
|
||||||
bool didAppend = append_porterduff_term(fsBuilder, srcCoeff, srcColor, srcColor, dstColor,
|
|
||||||
false);
|
|
||||||
// append dst blend
|
|
||||||
if(!append_porterduff_term(fsBuilder, dstCoeff, dstColor, srcColor, dstColor, didAppend)) {
|
|
||||||
fsBuilder->codeAppend("half4(0, 0, 0, 0)");
|
|
||||||
}
|
|
||||||
fsBuilder->codeAppend(";");
|
|
||||||
}
|
}
|
||||||
|
|||||||
@ -20,9 +20,6 @@ namespace GrGLSLBlend {
|
|||||||
*/
|
*/
|
||||||
void AppendMode(GrGLSLFragmentBuilder* fsBuilder, const char* srcColor,
|
void AppendMode(GrGLSLFragmentBuilder* fsBuilder, const char* srcColor,
|
||||||
const char* dstColor, const char* outColor, SkBlendMode mode);
|
const char* dstColor, const char* outColor, SkBlendMode mode);
|
||||||
|
|
||||||
void AppendRegionOp(GrGLSLFragmentBuilder* fsBuilder, const char* srcColor,
|
|
||||||
const char* dstColor, const char* outColor, SkRegion::Op regionOp);
|
|
||||||
};
|
};
|
||||||
|
|
||||||
#endif
|
#endif
|
||||||
|
|||||||
@ -45,6 +45,10 @@ static const char* SKSL_GPU_INCLUDE =
|
|||||||
#include "sksl_gpu.inc"
|
#include "sksl_gpu.inc"
|
||||||
;
|
;
|
||||||
|
|
||||||
|
static const char* SKSL_BLEND_INCLUDE =
|
||||||
|
#include "sksl_blend.inc"
|
||||||
|
;
|
||||||
|
|
||||||
static const char* SKSL_INTERP_INCLUDE =
|
static const char* SKSL_INTERP_INCLUDE =
|
||||||
#include "sksl_interp.inc"
|
#include "sksl_interp.inc"
|
||||||
;
|
;
|
||||||
@ -258,6 +262,9 @@ Compiler::Compiler(Flags flags)
|
|||||||
std::vector<std::unique_ptr<ProgramElement>> gpuIntrinsics;
|
std::vector<std::unique_ptr<ProgramElement>> gpuIntrinsics;
|
||||||
this->processIncludeFile(Program::kFragment_Kind, SKSL_GPU_INCLUDE, strlen(SKSL_GPU_INCLUDE),
|
this->processIncludeFile(Program::kFragment_Kind, SKSL_GPU_INCLUDE, strlen(SKSL_GPU_INCLUDE),
|
||||||
symbols, &gpuIntrinsics, &fGpuSymbolTable);
|
symbols, &gpuIntrinsics, &fGpuSymbolTable);
|
||||||
|
this->processIncludeFile(Program::kFragment_Kind, SKSL_BLEND_INCLUDE,
|
||||||
|
strlen(SKSL_BLEND_INCLUDE), std::move(fGpuSymbolTable), &gpuIntrinsics,
|
||||||
|
&fGpuSymbolTable);
|
||||||
grab_intrinsics(&gpuIntrinsics, &fGPUIntrinsics);
|
grab_intrinsics(&gpuIntrinsics, &fGPUIntrinsics);
|
||||||
// need to hang on to the source so that FunctionDefinition.fSource pointers in this file
|
// need to hang on to the source so that FunctionDefinition.fSource pointers in this file
|
||||||
// remain valid
|
// remain valid
|
||||||
|
|||||||
@ -132,6 +132,7 @@ static void fill_caps(const SKSL_CAPS_CLASS& caps,
|
|||||||
CAP(mustEnableSpecificAdvBlendEqs);
|
CAP(mustEnableSpecificAdvBlendEqs);
|
||||||
CAP(mustDeclareFragmentShaderOutput);
|
CAP(mustDeclareFragmentShaderOutput);
|
||||||
CAP(mustDoOpBetweenFloorAndAbs);
|
CAP(mustDoOpBetweenFloorAndAbs);
|
||||||
|
CAP(mustGuardDivisionEvenAfterExplicitZeroCheck);
|
||||||
CAP(atan2ImplementedAsAtanYOverX);
|
CAP(atan2ImplementedAsAtanYOverX);
|
||||||
CAP(canUseAnyFunctionInShader);
|
CAP(canUseAnyFunctionInShader);
|
||||||
CAP(floatIs32Bits);
|
CAP(floatIs32Bits);
|
||||||
|
|||||||
@ -108,6 +108,10 @@ public:
|
|||||||
return false;
|
return false;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
bool mustGuardDivisionEvenAfterExplicitZeroCheck() const {
|
||||||
|
return false;
|
||||||
|
}
|
||||||
|
|
||||||
bool mustEnableAdvBlendEqs() const {
|
bool mustEnableAdvBlendEqs() const {
|
||||||
return false;
|
return false;
|
||||||
}
|
}
|
||||||
|
|||||||
294
src/sksl/sksl_blend.inc
Normal file
294
src/sksl/sksl_blend.inc
Normal file
@ -0,0 +1,294 @@
|
|||||||
|
R"SKSL(
|
||||||
|
// Definitions of functions implementing all of the SkBlendMode blends.
|
||||||
|
|
||||||
|
half4 blend_clear(half4 src, half4 dst) { return half4(0); }
|
||||||
|
|
||||||
|
half4 blend_src(half4 src, half4 dst) { return src; }
|
||||||
|
|
||||||
|
half4 blend_dst(half4 src, half4 dst) { return dst; }
|
||||||
|
|
||||||
|
half4 blend_src_over(half4 src, half4 dst) { return src + (1 - src.a)*dst; }
|
||||||
|
|
||||||
|
half4 blend_dst_over(half4 src, half4 dst) { return (1 - dst.a)*src + dst; }
|
||||||
|
|
||||||
|
half4 blend_src_in(half4 src, half4 dst) { return src*dst.a; }
|
||||||
|
|
||||||
|
half4 blend_dst_in(half4 src, half4 dst) { return src.a*dst; }
|
||||||
|
|
||||||
|
half4 blend_src_out(half4 src, half4 dst) { return (1 - dst.a)*src; }
|
||||||
|
|
||||||
|
half4 blend_dst_out(half4 src, half4 dst) { return (1 - src.a)*dst; }
|
||||||
|
|
||||||
|
half4 blend_src_atop(half4 src, half4 dst) { return dst.a*src + (1 - src.a)*dst; }
|
||||||
|
|
||||||
|
half4 blend_dst_atop(half4 src, half4 dst) { return (1 - dst.a) * src + src.a*dst; }
|
||||||
|
|
||||||
|
half4 blend_xor(half4 src, half4 dst) { return (1 - dst.a)*src + (1 - src.a)*dst; }
|
||||||
|
|
||||||
|
half4 blend_plus(half4 src, half4 dst) { return min(src + dst, 1); }
|
||||||
|
|
||||||
|
half4 blend_modulate(half4 src, half4 dst) { return src*dst; }
|
||||||
|
|
||||||
|
half4 blend_screen(half4 src, half4 dst) { return src + (1 - src)*dst; }
|
||||||
|
|
||||||
|
half _blend_overlay_component(half sc, half sa, half dc, half da) {
|
||||||
|
if (2*dc <= da) {
|
||||||
|
return 2*sc*dc;
|
||||||
|
}
|
||||||
|
return sa*da - 2*(da - dc)*(sa - sc);
|
||||||
|
}
|
||||||
|
|
||||||
|
half4 blend_overlay(half4 src, half4 dst) {
|
||||||
|
half4 result = half4(_blend_overlay_component(src.r, src.a, dst.r, dst.a),
|
||||||
|
_blend_overlay_component(src.g, src.a, dst.g, dst.a),
|
||||||
|
_blend_overlay_component(src.b, src.a, dst.b, dst.a),
|
||||||
|
src.a + (1 - src.a)*dst.a);
|
||||||
|
result.rgb += dst.rgb*(1 - src.a) + src.rgb*(1 - dst.a);
|
||||||
|
return result;
|
||||||
|
}
|
||||||
|
|
||||||
|
half4 blend_darken(half4 src, half4 dst) {
|
||||||
|
half4 result = blend_src_over(src, dst);
|
||||||
|
result.rgb = min(result.rgb, (1 - dst.a)*src.rgb + dst.rgb);
|
||||||
|
return result;
|
||||||
|
}
|
||||||
|
|
||||||
|
half4 blend_lighten(half4 src, half4 dst) {
|
||||||
|
half4 result = blend_src_over(src, dst);
|
||||||
|
result.rgb = max(result.rgb, (1 - dst.a)*src.rgb + dst.rgb);
|
||||||
|
return result;
|
||||||
|
}
|
||||||
|
|
||||||
|
half _guarded_divide(half n, half d) {
|
||||||
|
@if (sk_Caps.mustGuardDivisionEvenAfterExplicitZeroCheck) {
|
||||||
|
return n/(d + 0.00000001);
|
||||||
|
}
|
||||||
|
return n/d;
|
||||||
|
}
|
||||||
|
|
||||||
|
half _color_dodge_component(half sc, half sa, half dc, half da) {
|
||||||
|
if (dc == 0) {
|
||||||
|
return sc*(1 - da);
|
||||||
|
} else {
|
||||||
|
half d = sa - sc;
|
||||||
|
if (d == 0) {
|
||||||
|
return sa*da + sc*(1 - da) + dc*(1 - sa);
|
||||||
|
}
|
||||||
|
d = min(da, _guarded_divide(dc*sa, d));
|
||||||
|
return d*sa + sc*(1 - da) + dc*(1 - sa);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
half4 blend_color_dodge(half4 src, half4 dst) {
|
||||||
|
return half4(_color_dodge_component(src.r, src.a, dst.r, dst.a),
|
||||||
|
_color_dodge_component(src.g, src.a, dst.g, dst.a),
|
||||||
|
_color_dodge_component(src.b, src.a, dst.b, dst.a),
|
||||||
|
src.a + (1 - src.a)*dst.a);
|
||||||
|
}
|
||||||
|
|
||||||
|
half _color_burn_component(half sc, half sa, half dc, half da) {
|
||||||
|
if (da == dc) {
|
||||||
|
return sa*da + sc*(1 - da) + dc*(1 - sa);
|
||||||
|
} else if (sc == 0) {
|
||||||
|
return dc*(1 - sa);
|
||||||
|
}
|
||||||
|
half d = max(0, da - _guarded_divide((da - dc)*sa, sc));
|
||||||
|
return d*sa + sc*(1 - da) + dc*(1 - sa);
|
||||||
|
}
|
||||||
|
|
||||||
|
half4 blend_color_burn(half4 src, half4 dst) {
|
||||||
|
return half4(_color_burn_component(src.r, src.a, dst.r, dst.a),
|
||||||
|
_color_burn_component(src.g, src.a, dst.g, dst.a),
|
||||||
|
_color_burn_component(src.b, src.a, dst.b, dst.a),
|
||||||
|
src.a + (1 - src.a)*dst.a);
|
||||||
|
}
|
||||||
|
|
||||||
|
half4 blend_hard_light(half4 src, half4 dst) { return blend_overlay(dst, src); }
|
||||||
|
|
||||||
|
half _soft_light_component(half sc, half sa, half dc, half da) {
|
||||||
|
if (2*sc <= sa) {
|
||||||
|
return _guarded_divide(dc*dc*(sa - 2*sc), da) + (1 - da)*sc + dc*(-sa + 2*sc + 1);
|
||||||
|
} else if (4.0 * dc <= da) {
|
||||||
|
half DSqd = dc*dc;
|
||||||
|
half DCub = DSqd*dc;
|
||||||
|
half DaSqd = da*da;
|
||||||
|
half DaCub = DaSqd*da;
|
||||||
|
return _guarded_divide(DaSqd*(sc - dc*(3*sa - 6*sc - 1)) + 12*da*DSqd*(sa - 2*sc)
|
||||||
|
- 16*DCub * (sa - 2*sc) - DaCub*sc, DaSqd);
|
||||||
|
}
|
||||||
|
return dc*(sa - 2*sc + 1) + sc - sqrt(da*dc)*(sa - 2*sc) - da*sc;
|
||||||
|
}
|
||||||
|
|
||||||
|
half4 blend_soft_light(half4 src, half4 dst) {
|
||||||
|
if (dst.a == 0) {
|
||||||
|
return src;
|
||||||
|
}
|
||||||
|
return half4(_soft_light_component(src.r, src.a, dst.r, dst.a),
|
||||||
|
_soft_light_component(src.g, src.a, dst.g, dst.a),
|
||||||
|
_soft_light_component(src.b, src.a, dst.b, dst.a),
|
||||||
|
src.a + (1 - src.a)*dst.a);
|
||||||
|
}
|
||||||
|
|
||||||
|
half4 blend_difference(half4 src, half4 dst) {
|
||||||
|
return half4(src.rgb + dst.rgb - 2*min(src.rgb*dst.a, dst.rgb*src.a),
|
||||||
|
src.a + (1 - src.a)*dst.a);
|
||||||
|
}
|
||||||
|
|
||||||
|
half4 blend_exclusion(half4 src, half4 dst) {
|
||||||
|
return half4(dst.rgb + src.rgb - 2*dst.rgb*src.rgb, src.a + (1 - src.a)*dst.a);
|
||||||
|
}
|
||||||
|
|
||||||
|
half4 blend_multiply(half4 src, half4 dst) {
|
||||||
|
return half4((1 - src.a)*dst.rgb + (1 - dst.a)*src.rgb + src.rgb*dst.rgb,
|
||||||
|
src.a + (1 - src.a)*dst.a);
|
||||||
|
}
|
||||||
|
|
||||||
|
half _blend_color_luminance(half3 color) { return dot(half3(0.3, 0.59, 0.11), color); }
|
||||||
|
|
||||||
|
half3 _blend_set_color_luminance(half3 hueSatColor, half alpha, half3 lumColor) {
|
||||||
|
half lum = _blend_color_luminance(lumColor);
|
||||||
|
half3 result = lum - _blend_color_luminance(hueSatColor) + hueSatColor;
|
||||||
|
half minComp = min(min(result.r, result.g), result.b);
|
||||||
|
half maxComp = max(max(result.r, result.g), result.b);
|
||||||
|
if (minComp < 0 && lum != minComp) {
|
||||||
|
result = lum + (result - lum) * lum/(lum - minComp);
|
||||||
|
}
|
||||||
|
if (maxComp > alpha && maxComp != lum) {
|
||||||
|
return lum + ((result - lum) * (alpha - lum))/(maxComp - lum);
|
||||||
|
}
|
||||||
|
return result;
|
||||||
|
}
|
||||||
|
|
||||||
|
half _blend_color_saturation(half3 color) {
|
||||||
|
return max(max(color.r, color.g), color.b) - min(min(color.r, color.g), color.b);
|
||||||
|
}
|
||||||
|
|
||||||
|
half3 _blend_set_color_saturation_helper(half3 minMidMax, half sat) {
|
||||||
|
if (minMidMax.r < minMidMax.b) {
|
||||||
|
return half3(0, sat*(minMidMax.g - minMidMax.r)/(minMidMax.b - minMidMax.r), sat);
|
||||||
|
}
|
||||||
|
return half3(0);
|
||||||
|
}
|
||||||
|
|
||||||
|
half3 _blend_set_color_saturation(half3 hueLumColor, half3 satColor) {
|
||||||
|
half sat = _blend_color_saturation(satColor);
|
||||||
|
if (hueLumColor.r <= hueLumColor.g) {
|
||||||
|
if (hueLumColor.g <= hueLumColor.b) {
|
||||||
|
hueLumColor.rgb = _blend_set_color_saturation_helper(hueLumColor.rgb, sat);
|
||||||
|
} else if (hueLumColor.r <= hueLumColor.b) {
|
||||||
|
hueLumColor.rbg = _blend_set_color_saturation_helper(hueLumColor.rbg, sat);
|
||||||
|
} else {
|
||||||
|
hueLumColor.brg = _blend_set_color_saturation_helper(hueLumColor.brg, sat);
|
||||||
|
}
|
||||||
|
} else if (hueLumColor.r <= hueLumColor.b) {
|
||||||
|
hueLumColor.grb = _blend_set_color_saturation_helper(hueLumColor.grb, sat);
|
||||||
|
} else if (hueLumColor.g <= hueLumColor.b) {
|
||||||
|
hueLumColor.gbr = _blend_set_color_saturation_helper(hueLumColor.gbr, sat);
|
||||||
|
} else {
|
||||||
|
hueLumColor.bgr = _blend_set_color_saturation_helper(hueLumColor.bgr, sat);
|
||||||
|
}
|
||||||
|
return hueLumColor;
|
||||||
|
}
|
||||||
|
|
||||||
|
half4 blend_hue(half4 src, half4 dst) {
|
||||||
|
half alpha = dst.a*src.a;
|
||||||
|
half3 sda = src.rgb*dst.a;
|
||||||
|
half3 dsa = dst.rgb*src.a;
|
||||||
|
return half4(_blend_set_color_luminance(_blend_set_color_saturation(sda, dsa), alpha, dsa) +
|
||||||
|
dst.rgb - dsa + src.rgb - sda,
|
||||||
|
src.a + dst.a - alpha);
|
||||||
|
}
|
||||||
|
|
||||||
|
half4 blend_saturation(half4 src, half4 dst) {
|
||||||
|
half alpha = dst.a*src.a;
|
||||||
|
half3 sda = src.rgb*dst.a;
|
||||||
|
half3 dsa = dst.rgb*src.a;
|
||||||
|
return half4(_blend_set_color_luminance(_blend_set_color_saturation(dsa, sda), alpha, dsa) +
|
||||||
|
dst.rgb - dsa + src.rgb - sda,
|
||||||
|
src.a + dst.a - alpha);
|
||||||
|
}
|
||||||
|
|
||||||
|
half4 blend_color(half4 src, half4 dst) {
|
||||||
|
half alpha = dst.a*src.a;
|
||||||
|
half3 sda = src.rgb*dst.a;
|
||||||
|
half3 dsa = dst.rgb*src.a;
|
||||||
|
return half4(_blend_set_color_luminance(sda, alpha, dsa) + dst.rgb - dsa + src.rgb - sda,
|
||||||
|
src.a + dst.a - alpha);
|
||||||
|
}
|
||||||
|
|
||||||
|
half4 blend_luminosity(half4 src, half4 dst) {
|
||||||
|
half alpha = dst.a*src.a;
|
||||||
|
half3 sda = src.rgb*dst.a;
|
||||||
|
half3 dsa = dst.rgb*src.a;
|
||||||
|
return half4(_blend_set_color_luminance(dsa, alpha, sda) + dst.rgb - dsa + src.rgb - sda,
|
||||||
|
src.a + dst.a - alpha);
|
||||||
|
|
||||||
|
}
|
||||||
|
|
||||||
|
enum class SkBlendMode {
|
||||||
|
kClear = 0,
|
||||||
|
kSrc = 1,
|
||||||
|
kDst = 2,
|
||||||
|
kSrcOver = 3,
|
||||||
|
kDstOver = 4,
|
||||||
|
kSrcIn = 5,
|
||||||
|
kDstIn = 6,
|
||||||
|
kSrcOut = 7,
|
||||||
|
kDstOut = 8,
|
||||||
|
kSrcATop = 9,
|
||||||
|
kDstATop = 10,
|
||||||
|
kXor = 11,
|
||||||
|
kPlus = 12,
|
||||||
|
kModulate = 13,
|
||||||
|
kScreen = 14,
|
||||||
|
kOverlay = 15,
|
||||||
|
kDarken = 16,
|
||||||
|
kLighten = 17,
|
||||||
|
kColorDodge = 18,
|
||||||
|
kColorBurn = 19,
|
||||||
|
kHardLight = 20,
|
||||||
|
kSoftLight = 21,
|
||||||
|
kDifference = 22,
|
||||||
|
kExclusion = 23,
|
||||||
|
kMultiply = 24,
|
||||||
|
kHue = 25,
|
||||||
|
kSaturation = 26,
|
||||||
|
kColor = 27,
|
||||||
|
kLuminosity = 28
|
||||||
|
};
|
||||||
|
|
||||||
|
half4 blend(SkBlendMode mode, half4 src, half4 dst) {
|
||||||
|
switch (mode) {
|
||||||
|
case SkBlendMode::kClear: return blend_clear(src, dst);
|
||||||
|
case SkBlendMode::kSrc: return blend_src(src, dst);
|
||||||
|
case SkBlendMode::kDst: return blend_dst(src, dst);
|
||||||
|
case SkBlendMode::kSrcOver: return blend_src_over(src, dst);
|
||||||
|
case SkBlendMode::kDstOver: return blend_dst_over(src, dst);
|
||||||
|
case SkBlendMode::kSrcIn: return blend_src_in(src, dst);
|
||||||
|
case SkBlendMode::kDstIn: return blend_dst_in(src, dst);
|
||||||
|
case SkBlendMode::kSrcOut: return blend_src_out(src, dst);
|
||||||
|
case SkBlendMode::kDstOut: return blend_dst_out(src, dst);
|
||||||
|
case SkBlendMode::kSrcATop: return blend_src_atop(src, dst);
|
||||||
|
case SkBlendMode::kDstATop: return blend_dst_atop(src, dst);
|
||||||
|
case SkBlendMode::kXor: return blend_xor(src, dst);
|
||||||
|
case SkBlendMode::kPlus: return blend_plus(src, dst);
|
||||||
|
case SkBlendMode::kModulate: return blend_modulate(src, dst);
|
||||||
|
case SkBlendMode::kScreen: return blend_screen(src, dst);
|
||||||
|
case SkBlendMode::kOverlay: return blend_overlay(src, dst);
|
||||||
|
case SkBlendMode::kDarken: return blend_darken(src, dst);
|
||||||
|
case SkBlendMode::kLighten: return blend_lighten(src, dst);
|
||||||
|
case SkBlendMode::kColorDodge: return blend_color_dodge(src, dst);
|
||||||
|
case SkBlendMode::kColorBurn: return blend_color_burn(src, dst);
|
||||||
|
case SkBlendMode::kHardLight: return blend_hard_light(src, dst);
|
||||||
|
case SkBlendMode::kSoftLight: return blend_soft_light(src, dst);
|
||||||
|
case SkBlendMode::kDifference: return blend_difference(src, dst);
|
||||||
|
case SkBlendMode::kExclusion: return blend_exclusion(src, dst);
|
||||||
|
case SkBlendMode::kMultiply: return blend_multiply(src, dst);
|
||||||
|
case SkBlendMode::kHue: return blend_hue(src, dst);
|
||||||
|
case SkBlendMode::kSaturation: return blend_saturation(src, dst);
|
||||||
|
case SkBlendMode::kColor: return blend_color(src, dst);
|
||||||
|
case SkBlendMode::kLuminosity: return blend_luminosity(src, dst);
|
||||||
|
}
|
||||||
|
return half4(0); // Avoids "'blend' can exit without returning a value."
|
||||||
|
}
|
||||||
|
)SKSL"
|
||||||
@ -1,4 +1,4 @@
|
|||||||
STRINGIFY(
|
R"SKSL(
|
||||||
|
|
||||||
// defines built-in functions supported by SkSL when running on a GPU
|
// defines built-in functions supported by SkSL when running on a GPU
|
||||||
|
|
||||||
@ -295,5 +295,4 @@ float interpolateAtOffset(float interpolant, float2 offset);
|
|||||||
float2 interpolateAtOffset(float2 interpolant, float2 offset);
|
float2 interpolateAtOffset(float2 interpolant, float2 offset);
|
||||||
float3 interpolateAtOffset(float3 interpolant, float2 offset);
|
float3 interpolateAtOffset(float3 interpolant, float2 offset);
|
||||||
float4 interpolateAtOffset(float4 interpolant, float2 offset);
|
float4 interpolateAtOffset(float4 interpolant, float2 offset);
|
||||||
|
)SKSL"
|
||||||
)
|
|
||||||
|
|||||||
@ -343,10 +343,10 @@ bool log_texture_proxy(GrContext* context, sk_sp<GrTextureProxy> src, SkString*
|
|||||||
|
|
||||||
bool fuzzy_color_equals(const SkPMColor4f& c1, const SkPMColor4f& c2) {
|
bool fuzzy_color_equals(const SkPMColor4f& c1, const SkPMColor4f& c2) {
|
||||||
// With the loss of precision of rendering into 32-bit color, then estimating the FP's output
|
// With the loss of precision of rendering into 32-bit color, then estimating the FP's output
|
||||||
// from that, it is not uncommon for a valid output to differ from estimate by up to 0.01
|
// from that, it is not uncommon for a valid output to differ from estimate by up to 0.03
|
||||||
// (really 1/128 ~ .0078, but frequently floating point issues make that tolerance a little
|
// (really 1/128 ~ .0078, but frequently floating point issues make that tolerance a little
|
||||||
// too unforgiving).
|
// too unforgiving).
|
||||||
static constexpr SkScalar kTolerance = 0.01f;
|
static constexpr SkScalar kTolerance = 0.03f;
|
||||||
for (int i = 0; i < 4; i++) {
|
for (int i = 0; i < 4; i++) {
|
||||||
if (!SkScalarNearlyEqual(c1[i], c2[i], kTolerance)) {
|
if (!SkScalarNearlyEqual(c1[i], c2[i], kTolerance)) {
|
||||||
return false;
|
return false;
|
||||||
|
|||||||
Loading…
Reference in New Issue
Block a user