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Diffstat (limited to 'gfx/layers/opengl/OGLShaderProgram.cpp')
| -rw-r--r-- | gfx/layers/opengl/OGLShaderProgram.cpp | 974 |
1 files changed, 974 insertions, 0 deletions
diff --git a/gfx/layers/opengl/OGLShaderProgram.cpp b/gfx/layers/opengl/OGLShaderProgram.cpp new file mode 100644 index 000000000..c06dc52dd --- /dev/null +++ b/gfx/layers/opengl/OGLShaderProgram.cpp @@ -0,0 +1,974 @@ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this file, + * You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#include "OGLShaderProgram.h" +#include <stdint.h> // for uint32_t +#include <sstream> // for ostringstream +#include "gfxEnv.h" +#include "gfxRect.h" // for gfxRect +#include "gfxUtils.h" +#include "mozilla/DebugOnly.h" // for DebugOnly +#include "mozilla/layers/Compositor.h" // for BlendOpIsMixBlendMode +#include "nsAString.h" +#include "nsString.h" // for nsAutoCString +#include "Layers.h" +#include "GLContext.h" + +namespace mozilla { +namespace layers { + +using namespace std; + +#define GAUSSIAN_KERNEL_HALF_WIDTH 11 +#define GAUSSIAN_KERNEL_STEP 0.2 + +void +AddUniforms(ProgramProfileOGL& aProfile) +{ + // This needs to be kept in sync with the KnownUniformName enum + static const char *sKnownUniformNames[] = { + "uLayerTransform", + "uLayerTransformInverse", + "uMaskTransform", + "uBackdropTransform", + "uLayerRects", + "uMatrixProj", + "uTextureTransform", + "uTextureRects", + "uRenderTargetOffset", + "uLayerOpacity", + "uTexture", + "uYTexture", + "uCbTexture", + "uCrTexture", + "uBlackTexture", + "uWhiteTexture", + "uMaskTexture", + "uBackdropTexture", + "uRenderColor", + "uTexCoordMultiplier", + "uCbCrTexCoordMultiplier", + "uTexturePass2", + "uColorMatrix", + "uColorMatrixVector", + "uBlurRadius", + "uBlurOffset", + "uBlurAlpha", + "uBlurGaussianKernel", + "uSSEdges", + "uViewportSize", + "uVisibleCenter", + "uYuvColorMatrix", + nullptr + }; + + for (int i = 0; sKnownUniformNames[i] != nullptr; ++i) { + aProfile.mUniforms[i].mNameString = sKnownUniformNames[i]; + aProfile.mUniforms[i].mName = (KnownUniform::KnownUniformName) i; + } +} + +void +ShaderConfigOGL::SetRenderColor(bool aEnabled) +{ + SetFeature(ENABLE_RENDER_COLOR, aEnabled); +} + +void +ShaderConfigOGL::SetTextureTarget(GLenum aTarget) +{ + SetFeature(ENABLE_TEXTURE_EXTERNAL | ENABLE_TEXTURE_RECT, false); + switch (aTarget) { + case LOCAL_GL_TEXTURE_EXTERNAL: + SetFeature(ENABLE_TEXTURE_EXTERNAL, true); + break; + case LOCAL_GL_TEXTURE_RECTANGLE_ARB: + SetFeature(ENABLE_TEXTURE_RECT, true); + break; + } +} + +void +ShaderConfigOGL::SetRBSwap(bool aEnabled) +{ + SetFeature(ENABLE_TEXTURE_RB_SWAP, aEnabled); +} + +void +ShaderConfigOGL::SetNoAlpha(bool aEnabled) +{ + SetFeature(ENABLE_TEXTURE_NO_ALPHA, aEnabled); +} + +void +ShaderConfigOGL::SetOpacity(bool aEnabled) +{ + SetFeature(ENABLE_OPACITY, aEnabled); +} + +void +ShaderConfigOGL::SetYCbCr(bool aEnabled) +{ + SetFeature(ENABLE_TEXTURE_YCBCR, aEnabled); + MOZ_ASSERT(!(mFeatures & ENABLE_TEXTURE_NV12)); +} + +void +ShaderConfigOGL::SetNV12(bool aEnabled) +{ + SetFeature(ENABLE_TEXTURE_NV12, aEnabled); + MOZ_ASSERT(!(mFeatures & ENABLE_TEXTURE_YCBCR)); +} + +void +ShaderConfigOGL::SetComponentAlpha(bool aEnabled) +{ + SetFeature(ENABLE_TEXTURE_COMPONENT_ALPHA, aEnabled); +} + +void +ShaderConfigOGL::SetColorMatrix(bool aEnabled) +{ + SetFeature(ENABLE_COLOR_MATRIX, aEnabled); +} + +void +ShaderConfigOGL::SetBlur(bool aEnabled) +{ + SetFeature(ENABLE_BLUR, aEnabled); +} + +void +ShaderConfigOGL::SetMask(bool aEnabled) +{ + SetFeature(ENABLE_MASK, aEnabled); +} + +void +ShaderConfigOGL::SetNoPremultipliedAlpha() +{ + SetFeature(ENABLE_NO_PREMUL_ALPHA, true); +} + +void +ShaderConfigOGL::SetDEAA(bool aEnabled) +{ + SetFeature(ENABLE_DEAA, aEnabled); +} + +void +ShaderConfigOGL::SetCompositionOp(gfx::CompositionOp aOp) +{ + mCompositionOp = aOp; +} + +void +ShaderConfigOGL::SetDynamicGeometry(bool aEnabled) +{ + SetFeature(ENABLE_DYNAMIC_GEOMETRY, aEnabled); +} + +/* static */ ProgramProfileOGL +ProgramProfileOGL::GetProfileFor(ShaderConfigOGL aConfig) +{ + ProgramProfileOGL result; + ostringstream fs, vs; + + AddUniforms(result); + + gfx::CompositionOp blendOp = aConfig.mCompositionOp; + + vs << "#ifdef GL_ES" << endl; + vs << "#define EDGE_PRECISION mediump" << endl; + vs << "#else" << endl; + vs << "#define EDGE_PRECISION" << endl; + vs << "#endif" << endl; + vs << "uniform mat4 uMatrixProj;" << endl; + vs << "uniform vec4 uLayerRects[4];" << endl; + vs << "uniform mat4 uLayerTransform;" << endl; + if (aConfig.mFeatures & ENABLE_DEAA) { + vs << "uniform mat4 uLayerTransformInverse;" << endl; + vs << "uniform EDGE_PRECISION vec3 uSSEdges[4];" << endl; + vs << "uniform vec2 uVisibleCenter;" << endl; + vs << "uniform vec2 uViewportSize;" << endl; + } + vs << "uniform vec2 uRenderTargetOffset;" << endl; + vs << "attribute vec4 aCoord;" << endl; + result.mAttributes.AppendElement(Pair<nsCString, GLuint> {"aCoord", 0}); + + if (!(aConfig.mFeatures & ENABLE_RENDER_COLOR)) { + vs << "uniform mat4 uTextureTransform;" << endl; + vs << "uniform vec4 uTextureRects[4];" << endl; + vs << "varying vec2 vTexCoord;" << endl; + + if (aConfig.mFeatures & ENABLE_DYNAMIC_GEOMETRY) { + vs << "attribute vec2 aTexCoord;" << endl; + result.mAttributes.AppendElement(Pair<nsCString, GLuint> {"aTexCoord", 1}); + } + } + + if (BlendOpIsMixBlendMode(blendOp)) { + vs << "uniform mat4 uBackdropTransform;" << endl; + vs << "varying vec2 vBackdropCoord;" << endl; + } + + if (aConfig.mFeatures & ENABLE_MASK) { + vs << "uniform mat4 uMaskTransform;" << endl; + vs << "varying vec3 vMaskCoord;" << endl; + } + + vs << "void main() {" << endl; + + if (aConfig.mFeatures & ENABLE_DYNAMIC_GEOMETRY) { + vs << " vec4 finalPosition = vec4(aCoord.xy, 0.0, 1.0);" << endl; + } else { + vs << " int vertexID = int(aCoord.w);" << endl; + vs << " vec4 layerRect = uLayerRects[vertexID];" << endl; + vs << " vec4 finalPosition = vec4(aCoord.xy * layerRect.zw + layerRect.xy, 0.0, 1.0);" << endl; + } + + vs << " finalPosition = uLayerTransform * finalPosition;" << endl; + + if (aConfig.mFeatures & ENABLE_DEAA) { + // XXX kip - The DEAA shader could be made simpler if we switch to + // using dynamic vertex buffers instead of sending everything + // in through uniforms. This would enable passing information + // about how to dilate each vertex explicitly and eliminate the + // need to extrapolate this with the sub-pixel coverage + // calculation in the vertex shader. + + // Calculate the screen space position of this vertex, in screen pixels + vs << " vec4 ssPos = finalPosition;" << endl; + vs << " ssPos.xy -= uRenderTargetOffset * finalPosition.w;" << endl; + vs << " ssPos = uMatrixProj * ssPos;" << endl; + vs << " ssPos.xy = ((ssPos.xy/ssPos.w)*0.5+0.5)*uViewportSize;" << endl; + + if (aConfig.mFeatures & ENABLE_MASK || + !(aConfig.mFeatures & ENABLE_RENDER_COLOR)) { + vs << " vec4 coordAdjusted;" << endl; + vs << " coordAdjusted.xy = aCoord.xy;" << endl; + } + + // It is necessary to dilate edges away from uVisibleCenter to ensure that + // fragments with less than 50% sub-pixel coverage will be shaded. + // This offset is applied when the sub-pixel coverage of the vertex is + // less than 100%. Expanding by 0.5 pixels in screen space is sufficient + // to include these pixels. + vs << " if (dot(uSSEdges[0], vec3(ssPos.xy, 1.0)) < 1.5 ||" << endl; + vs << " dot(uSSEdges[1], vec3(ssPos.xy, 1.0)) < 1.5 ||" << endl; + vs << " dot(uSSEdges[2], vec3(ssPos.xy, 1.0)) < 1.5 ||" << endl; + vs << " dot(uSSEdges[3], vec3(ssPos.xy, 1.0)) < 1.5) {" << endl; + // If the shader reaches this branch, then this vertex is on the edge of + // the layer's visible rect and should be dilated away from the center of + // the visible rect. We don't want to hit this for inner facing + // edges between tiles, as the pixels may be covered twice without clipping + // against uSSEdges. If all edges were dilated, it would result in + // artifacts visible within semi-transparent layers with multiple tiles. + vs << " vec4 visibleCenter = uLayerTransform * vec4(uVisibleCenter, 0.0, 1.0);" << endl; + vs << " vec2 dilateDir = finalPosition.xy / finalPosition.w - visibleCenter.xy / visibleCenter.w;" << endl; + vs << " vec2 offset = sign(dilateDir) * 0.5;" << endl; + vs << " finalPosition.xy += offset * finalPosition.w;" << endl; + if (!(aConfig.mFeatures & ENABLE_RENDER_COLOR)) { + // We must adjust the texture coordinates to compensate for the dilation + vs << " coordAdjusted = uLayerTransformInverse * finalPosition;" << endl; + vs << " coordAdjusted /= coordAdjusted.w;" << endl; + + if (!(aConfig.mFeatures & ENABLE_DYNAMIC_GEOMETRY)) { + vs << " coordAdjusted.xy -= layerRect.xy;" << endl; + vs << " coordAdjusted.xy /= layerRect.zw;" << endl; + } + } + vs << " }" << endl; + + if (!(aConfig.mFeatures & ENABLE_RENDER_COLOR)) { + if (aConfig.mFeatures & ENABLE_DYNAMIC_GEOMETRY) { + vs << " vTexCoord = (uTextureTransform * vec4(aTexCoord, 0.0, 1.0)).xy;" << endl; + } else { + vs << " vec4 textureRect = uTextureRects[vertexID];" << endl; + vs << " vec2 texCoord = coordAdjusted.xy * textureRect.zw + textureRect.xy;" << endl; + vs << " vTexCoord = (uTextureTransform * vec4(texCoord, 0.0, 1.0)).xy;" << endl; + } + } + } else if (!(aConfig.mFeatures & ENABLE_RENDER_COLOR)) { + if (aConfig.mFeatures & ENABLE_DYNAMIC_GEOMETRY) { + vs << " vTexCoord = (uTextureTransform * vec4(aTexCoord, 0.0, 1.0)).xy;" << endl; + } else { + vs << " vec4 textureRect = uTextureRects[vertexID];" << endl; + vs << " vec2 texCoord = aCoord.xy * textureRect.zw + textureRect.xy;" << endl; + vs << " vTexCoord = (uTextureTransform * vec4(texCoord, 0.0, 1.0)).xy;" << endl; + } + } + + if (aConfig.mFeatures & ENABLE_MASK) { + vs << " vMaskCoord.xy = (uMaskTransform * (finalPosition / finalPosition.w)).xy;" << endl; + // correct for perspective correct interpolation, see comment in D3D11 shader + vs << " vMaskCoord.z = 1.0;" << endl; + vs << " vMaskCoord *= finalPosition.w;" << endl; + } + vs << " finalPosition.xy -= uRenderTargetOffset * finalPosition.w;" << endl; + vs << " finalPosition = uMatrixProj * finalPosition;" << endl; + if (BlendOpIsMixBlendMode(blendOp)) { + // Translate from clip space (-1, 1) to (0..1), apply the backdrop + // transform, then invert the y-axis. + vs << " vBackdropCoord.x = (finalPosition.x + 1.0) / 2.0;" << endl; + vs << " vBackdropCoord.y = 1.0 - (finalPosition.y + 1.0) / 2.0;" << endl; + vs << " vBackdropCoord = (uBackdropTransform * vec4(vBackdropCoord.xy, 0.0, 1.0)).xy;" << endl; + vs << " vBackdropCoord.y = 1.0 - vBackdropCoord.y;" << endl; + } + vs << " gl_Position = finalPosition;" << endl; + vs << "}" << endl; + + if (aConfig.mFeatures & ENABLE_TEXTURE_RECT) { + fs << "#extension GL_ARB_texture_rectangle : require" << endl; + } + if (aConfig.mFeatures & ENABLE_TEXTURE_EXTERNAL) { + fs << "#extension GL_OES_EGL_image_external : require" << endl; + } + fs << "#ifdef GL_ES" << endl; + fs << "precision mediump float;" << endl; + fs << "#define COLOR_PRECISION lowp" << endl; + fs << "#define EDGE_PRECISION mediump" << endl; + fs << "#else" << endl; + fs << "#define COLOR_PRECISION" << endl; + fs << "#define EDGE_PRECISION" << endl; + fs << "#endif" << endl; + if (aConfig.mFeatures & ENABLE_RENDER_COLOR) { + fs << "uniform COLOR_PRECISION vec4 uRenderColor;" << endl; + } else { + // for tiling, texcoord can be greater than the lowfp range + fs << "varying vec2 vTexCoord;" << endl; + if (aConfig.mFeatures & ENABLE_BLUR) { + fs << "uniform bool uBlurAlpha;" << endl; + fs << "uniform vec2 uBlurRadius;" << endl; + fs << "uniform vec2 uBlurOffset;" << endl; + fs << "uniform float uBlurGaussianKernel[" << GAUSSIAN_KERNEL_HALF_WIDTH << "];" << endl; + } + if (aConfig.mFeatures & ENABLE_COLOR_MATRIX) { + fs << "uniform mat4 uColorMatrix;" << endl; + fs << "uniform vec4 uColorMatrixVector;" << endl; + } + if (aConfig.mFeatures & ENABLE_OPACITY) { + fs << "uniform COLOR_PRECISION float uLayerOpacity;" << endl; + } + } + if (BlendOpIsMixBlendMode(blendOp)) { + fs << "varying vec2 vBackdropCoord;" << endl; + } + + const char *sampler2D = "sampler2D"; + const char *texture2D = "texture2D"; + + if (aConfig.mFeatures & ENABLE_TEXTURE_RECT) { + fs << "uniform vec2 uTexCoordMultiplier;" << endl; + if (aConfig.mFeatures & ENABLE_TEXTURE_YCBCR || + aConfig.mFeatures & ENABLE_TEXTURE_NV12) { + fs << "uniform vec2 uCbCrTexCoordMultiplier;" << endl; + } + sampler2D = "sampler2DRect"; + texture2D = "texture2DRect"; + } + + if (aConfig.mFeatures & ENABLE_TEXTURE_EXTERNAL) { + sampler2D = "samplerExternalOES"; + } + + if (aConfig.mFeatures & ENABLE_TEXTURE_YCBCR) { + fs << "uniform sampler2D uYTexture;" << endl; + fs << "uniform sampler2D uCbTexture;" << endl; + fs << "uniform sampler2D uCrTexture;" << endl; + fs << "uniform mat3 uYuvColorMatrix;" << endl; + } else if (aConfig.mFeatures & ENABLE_TEXTURE_NV12) { + fs << "uniform " << sampler2D << " uYTexture;" << endl; + fs << "uniform " << sampler2D << " uCbTexture;" << endl; + } else if (aConfig.mFeatures & ENABLE_TEXTURE_COMPONENT_ALPHA) { + fs << "uniform " << sampler2D << " uBlackTexture;" << endl; + fs << "uniform " << sampler2D << " uWhiteTexture;" << endl; + fs << "uniform bool uTexturePass2;" << endl; + } else { + fs << "uniform " << sampler2D << " uTexture;" << endl; + } + + if (BlendOpIsMixBlendMode(blendOp)) { + // Component alpha should be flattened away inside blend containers. + MOZ_ASSERT(!(aConfig.mFeatures & ENABLE_TEXTURE_COMPONENT_ALPHA)); + + fs << "uniform sampler2D uBackdropTexture;" << endl; + } + + if (aConfig.mFeatures & ENABLE_MASK) { + fs << "varying vec3 vMaskCoord;" << endl; + fs << "uniform sampler2D uMaskTexture;" << endl; + } + + if (aConfig.mFeatures & ENABLE_DEAA) { + fs << "uniform EDGE_PRECISION vec3 uSSEdges[4];" << endl; + } + + if (BlendOpIsMixBlendMode(blendOp)) { + BuildMixBlender(aConfig, fs); + } + + if (!(aConfig.mFeatures & ENABLE_RENDER_COLOR)) { + fs << "vec4 sample(vec2 coord) {" << endl; + fs << " vec4 color;" << endl; + if (aConfig.mFeatures & ENABLE_TEXTURE_YCBCR || + aConfig.mFeatures & ENABLE_TEXTURE_NV12) { + if (aConfig.mFeatures & ENABLE_TEXTURE_YCBCR) { + if (aConfig.mFeatures & ENABLE_TEXTURE_RECT) { + fs << " COLOR_PRECISION float y = texture2D(uYTexture, coord * uTexCoordMultiplier).r;" << endl; + fs << " COLOR_PRECISION float cb = texture2D(uCbTexture, coord * uCbCrTexCoordMultiplier).r;" << endl; + fs << " COLOR_PRECISION float cr = texture2D(uCrTexture, coord * uCbCrTexCoordMultiplier).r;" << endl; + } else { + fs << " COLOR_PRECISION float y = texture2D(uYTexture, coord).r;" << endl; + fs << " COLOR_PRECISION float cb = texture2D(uCbTexture, coord).r;" << endl; + fs << " COLOR_PRECISION float cr = texture2D(uCrTexture, coord).r;" << endl; + } + } else { + if (aConfig.mFeatures & ENABLE_TEXTURE_RECT) { + fs << " COLOR_PRECISION float y = " << texture2D << "(uYTexture, coord * uTexCoordMultiplier).r;" << endl; + fs << " COLOR_PRECISION float cb = " << texture2D << "(uCbTexture, coord * uCbCrTexCoordMultiplier).r;" << endl; + fs << " COLOR_PRECISION float cr = " << texture2D << "(uCbTexture, coord * uCbCrTexCoordMultiplier).a;" << endl; + } else { + fs << " COLOR_PRECISION float y = " << texture2D << "(uYTexture, coord).r;" << endl; + fs << " COLOR_PRECISION float cb = " << texture2D << "(uCbTexture, coord).r;" << endl; + fs << " COLOR_PRECISION float cr = " << texture2D << "(uCbTexture, coord).a;" << endl; + } + } + + fs << " y = y - 0.06275;" << endl; + fs << " cb = cb - 0.50196;" << endl; + fs << " cr = cr - 0.50196;" << endl; + fs << " vec3 yuv = vec3(y, cb, cr);" << endl; + fs << " color.rgb = uYuvColorMatrix * yuv;" << endl; + fs << " color.a = 1.0;" << endl; + } else if (aConfig.mFeatures & ENABLE_TEXTURE_COMPONENT_ALPHA) { + if (aConfig.mFeatures & ENABLE_TEXTURE_RECT) { + fs << " COLOR_PRECISION vec3 onBlack = " << texture2D << "(uBlackTexture, coord * uTexCoordMultiplier).rgb;" << endl; + fs << " COLOR_PRECISION vec3 onWhite = " << texture2D << "(uWhiteTexture, coord * uTexCoordMultiplier).rgb;" << endl; + } else { + fs << " COLOR_PRECISION vec3 onBlack = " << texture2D << "(uBlackTexture, coord).rgb;" << endl; + fs << " COLOR_PRECISION vec3 onWhite = " << texture2D << "(uWhiteTexture, coord).rgb;" << endl; + } + fs << " COLOR_PRECISION vec4 alphas = (1.0 - onWhite + onBlack).rgbg;" << endl; + fs << " if (uTexturePass2)" << endl; + fs << " color = vec4(onBlack, alphas.a);" << endl; + fs << " else" << endl; + fs << " color = alphas;" << endl; + } else { + if (aConfig.mFeatures & ENABLE_TEXTURE_RECT) { + fs << " color = " << texture2D << "(uTexture, coord * uTexCoordMultiplier);" << endl; + } else { + fs << " color = " << texture2D << "(uTexture, coord);" << endl; + } + } + if (aConfig.mFeatures & ENABLE_TEXTURE_RB_SWAP) { + fs << " color = color.bgra;" << endl; + } + if (aConfig.mFeatures & ENABLE_TEXTURE_NO_ALPHA) { + fs << " color = vec4(color.rgb, 1.0);" << endl; + } + fs << " return color;" << endl; + fs << "}" << endl; + if (aConfig.mFeatures & ENABLE_BLUR) { + fs << "vec4 sampleAtRadius(vec2 coord, float radius) {" << endl; + fs << " coord += uBlurOffset;" << endl; + fs << " coord += radius * uBlurRadius;" << endl; + fs << " if (coord.x < 0. || coord.y < 0. || coord.x > 1. || coord.y > 1.)" << endl; + fs << " return vec4(0, 0, 0, 0);" << endl; + fs << " return sample(coord);" << endl; + fs << "}" << endl; + fs << "vec4 blur(vec4 color, vec2 coord) {" << endl; + fs << " vec4 total = color * uBlurGaussianKernel[0];" << endl; + fs << " for (int i = 1; i < " << GAUSSIAN_KERNEL_HALF_WIDTH << "; ++i) {" << endl; + fs << " float r = float(i) * " << GAUSSIAN_KERNEL_STEP << ";" << endl; + fs << " float k = uBlurGaussianKernel[i];" << endl; + fs << " total += sampleAtRadius(coord, r) * k;" << endl; + fs << " total += sampleAtRadius(coord, -r) * k;" << endl; + fs << " }" << endl; + fs << " if (uBlurAlpha) {" << endl; + fs << " color *= total.a;" << endl; + fs << " } else {" << endl; + fs << " color = total;" << endl; + fs << " }" << endl; + fs << " return color;" << endl; + fs << "}" << endl; + } + } + fs << "void main() {" << endl; + if (aConfig.mFeatures & ENABLE_RENDER_COLOR) { + fs << " vec4 color = uRenderColor;" << endl; + } else { + fs << " vec4 color = sample(vTexCoord);" << endl; + if (aConfig.mFeatures & ENABLE_BLUR) { + fs << " color = blur(color, vTexCoord);" << endl; + } + if (aConfig.mFeatures & ENABLE_COLOR_MATRIX) { + fs << " color = uColorMatrix * vec4(color.rgb / color.a, color.a) + uColorMatrixVector;" << endl; + fs << " color.rgb *= color.a;" << endl; + } + if (aConfig.mFeatures & ENABLE_OPACITY) { + fs << " color *= uLayerOpacity;" << endl; + } + } + if (aConfig.mFeatures & ENABLE_DEAA) { + // Calculate the sub-pixel coverage of the pixel and modulate its opacity + // by that amount to perform DEAA. + fs << " vec3 ssPos = vec3(gl_FragCoord.xy, 1.0);" << endl; + fs << " float deaaCoverage = clamp(dot(uSSEdges[0], ssPos), 0.0, 1.0);" << endl; + fs << " deaaCoverage *= clamp(dot(uSSEdges[1], ssPos), 0.0, 1.0);" << endl; + fs << " deaaCoverage *= clamp(dot(uSSEdges[2], ssPos), 0.0, 1.0);" << endl; + fs << " deaaCoverage *= clamp(dot(uSSEdges[3], ssPos), 0.0, 1.0);" << endl; + fs << " color *= deaaCoverage;" << endl; + } + if (BlendOpIsMixBlendMode(blendOp)) { + fs << " vec4 backdrop = texture2D(uBackdropTexture, vBackdropCoord);" << endl; + fs << " color = mixAndBlend(backdrop, color);" << endl; + } + if (aConfig.mFeatures & ENABLE_MASK) { + fs << " vec2 maskCoords = vMaskCoord.xy / vMaskCoord.z;" << endl; + fs << " COLOR_PRECISION float mask = texture2D(uMaskTexture, maskCoords).r;" << endl; + fs << " color *= mask;" << endl; + } else { + fs << " COLOR_PRECISION float mask = 1.0;" << endl; + fs << " color *= mask;" << endl; + } + fs << " gl_FragColor = color;" << endl; + fs << "}" << endl; + + result.mVertexShaderString = vs.str(); + result.mFragmentShaderString = fs.str(); + + if (aConfig.mFeatures & ENABLE_RENDER_COLOR) { + result.mTextureCount = 0; + } else { + if (aConfig.mFeatures & ENABLE_TEXTURE_YCBCR) { + result.mTextureCount = 3; + } else if (aConfig.mFeatures & ENABLE_TEXTURE_NV12) { + result.mTextureCount = 2; + } else if (aConfig.mFeatures & ENABLE_TEXTURE_COMPONENT_ALPHA) { + result.mTextureCount = 2; + } else { + result.mTextureCount = 1; + } + } + if (aConfig.mFeatures & ENABLE_MASK) { + result.mTextureCount = 1; + } + if (BlendOpIsMixBlendMode(blendOp)) { + result.mTextureCount += 1; + } + + return result; +} + +void +ProgramProfileOGL::BuildMixBlender(const ShaderConfigOGL& aConfig, std::ostringstream& fs) +{ + // From the "Compositing and Blending Level 1" spec. + // Generate helper functions first. + switch (aConfig.mCompositionOp) { + case gfx::CompositionOp::OP_OVERLAY: + case gfx::CompositionOp::OP_HARD_LIGHT: + // Note: we substitute (2*src-1) into the screen formula below. + fs << "float hardlight(float dest, float src) {" << endl; + fs << " if (src <= 0.5) {" << endl; + fs << " return dest * (2.0 * src);" << endl; + fs << " } else {" << endl; + fs << " return 2.0*dest + 2.0*src - 1.0 - 2.0*dest*src;" << endl; + fs << " }" << endl; + fs << "}" << endl; + break; + case gfx::CompositionOp::OP_COLOR_DODGE: + fs << "float dodge(float dest, float src) {" << endl; + fs << " if (dest == 0.0) {" << endl; + fs << " return 0.0;" << endl; + fs << " } else if (src == 1.0) {" << endl; + fs << " return 1.0;" << endl; + fs << " } else {" << endl; + fs << " return min(1.0, dest / (1.0 - src));" << endl; + fs << " }" << endl; + fs << "}" << endl; + break; + case gfx::CompositionOp::OP_COLOR_BURN: + fs << "float burn(float dest, float src) {" << endl; + fs << " if (dest == 1.0) {" << endl; + fs << " return 1.0;" << endl; + fs << " } else if (src == 0.0) {" << endl; + fs << " return 0.0;" << endl; + fs << " } else {" << endl; + fs << " return 1.0 - min(1.0, (1.0 - dest) / src);" << endl; + fs << " }" << endl; + fs << "}" << endl; + break; + case gfx::CompositionOp::OP_SOFT_LIGHT: + fs << "float darken(float dest) {" << endl; + fs << " if (dest <= 0.25) {" << endl; + fs << " return ((16.0 * dest - 12.0) * dest + 4.0) * dest;" << endl; + fs << " } else {" << endl; + fs << " return sqrt(dest);" << endl; + fs << " }" << endl; + fs << "}" << endl; + fs << "float softlight(float dest, float src) {" << endl; + fs << " if (src <= 0.5) {" << endl; + fs << " return dest - (1.0 - 2.0 * src) * dest * (1.0 - dest);" << endl; + fs << " } else {" << endl; + fs << " return dest + (2.0 * src - 1.0) * (darken(dest) - dest);" << endl; + fs << " }" << endl; + fs << "}" << endl; + break; + case gfx::CompositionOp::OP_HUE: + case gfx::CompositionOp::OP_SATURATION: + case gfx::CompositionOp::OP_COLOR: + case gfx::CompositionOp::OP_LUMINOSITY: + fs << "float Lum(vec3 c) {" << endl; + fs << " return dot(vec3(0.3, 0.59, 0.11), c);" << endl; + fs << "}" << endl; + fs << "vec3 ClipColor(vec3 c) {" << endl; + fs << " float L = Lum(c);" << endl; + fs << " float n = min(min(c.r, c.g), c.b);" << endl; + fs << " float x = max(max(c.r, c.g), c.b);" << endl; + fs << " if (n < 0.0) {" << endl; + fs << " c = L + (((c - L) * L) / (L - n));" << endl; + fs << " }" << endl; + fs << " if (x > 1.0) {" << endl; + fs << " c = L + (((c - L) * (1.0 - L)) / (x - L));" << endl; + fs << " }" << endl; + fs << " return c;" << endl; + fs << "}" << endl; + fs << "vec3 SetLum(vec3 c, float L) {" << endl; + fs << " float d = L - Lum(c);" << endl; + fs << " return ClipColor(vec3(" << endl; + fs << " c.r + d," << endl; + fs << " c.g + d," << endl; + fs << " c.b + d));" << endl; + fs << "}" << endl; + fs << "float Sat(vec3 c) {" << endl; + fs << " return max(max(c.r, c.g), c.b) - min(min(c.r, c.g), c.b);" << endl; + fs << "}" << endl; + + // To use this helper, re-arrange rgb such that r=min, g=mid, and b=max. + fs << "vec3 SetSatInner(vec3 c, float s) {" << endl; + fs << " if (c.b > c.r) {" << endl; + fs << " c.g = (((c.g - c.r) * s) / (c.b - c.r));" << endl; + fs << " c.b = s;" << endl; + fs << " } else {" << endl; + fs << " c.gb = vec2(0.0, 0.0);" << endl; + fs << " }" << endl; + fs << " return vec3(0.0, c.gb);" << endl; + fs << "}" << endl; + + fs << "vec3 SetSat(vec3 c, float s) {" << endl; + fs << " if (c.r <= c.g) {" << endl; + fs << " if (c.g <= c.b) {" << endl; + fs << " c.rgb = SetSatInner(c.rgb, s);" << endl; + fs << " } else if (c.r <= c.b) {" << endl; + fs << " c.rbg = SetSatInner(c.rbg, s);" << endl; + fs << " } else {" << endl; + fs << " c.brg = SetSatInner(c.brg, s);" << endl; + fs << " }" << endl; + fs << " } else if (c.r <= c.b) {" << endl; + fs << " c.grb = SetSatInner(c.grb, s);" << endl; + fs << " } else if (c.g <= c.b) {" << endl; + fs << " c.gbr = SetSatInner(c.gbr, s);" << endl; + fs << " } else {" << endl; + fs << " c.bgr = SetSatInner(c.bgr, s);" << endl; + fs << " }" << endl; + fs << " return c;" << endl; + fs << "}" << endl; + break; + default: + break; + } + + // Generate the main blending helper. + fs << "vec3 blend(vec3 dest, vec3 src) {" << endl; + switch (aConfig.mCompositionOp) { + case gfx::CompositionOp::OP_MULTIPLY: + fs << " return dest * src;" << endl; + break; + case gfx::CompositionOp::OP_SCREEN: + fs << " return dest + src - (dest * src);" << endl; + break; + case gfx::CompositionOp::OP_OVERLAY: + fs << " return vec3(" << endl; + fs << " hardlight(src.r, dest.r)," << endl; + fs << " hardlight(src.g, dest.g)," << endl; + fs << " hardlight(src.b, dest.b));" << endl; + break; + case gfx::CompositionOp::OP_DARKEN: + fs << " return min(dest, src);" << endl; + break; + case gfx::CompositionOp::OP_LIGHTEN: + fs << " return max(dest, src);" << endl; + break; + case gfx::CompositionOp::OP_COLOR_DODGE: + fs << " return vec3(" << endl; + fs << " dodge(dest.r, src.r)," << endl; + fs << " dodge(dest.g, src.g)," << endl; + fs << " dodge(dest.b, src.b));" << endl; + break; + case gfx::CompositionOp::OP_COLOR_BURN: + fs << " return vec3(" << endl; + fs << " burn(dest.r, src.r)," << endl; + fs << " burn(dest.g, src.g)," << endl; + fs << " burn(dest.b, src.b));" << endl; + break; + case gfx::CompositionOp::OP_HARD_LIGHT: + fs << " return vec3(" << endl; + fs << " hardlight(dest.r, src.r)," << endl; + fs << " hardlight(dest.g, src.g)," << endl; + fs << " hardlight(dest.b, src.b));" << endl; + break; + case gfx::CompositionOp::OP_SOFT_LIGHT: + fs << " return vec3(" << endl; + fs << " softlight(dest.r, src.r)," << endl; + fs << " softlight(dest.g, src.g)," << endl; + fs << " softlight(dest.b, src.b));" << endl; + break; + case gfx::CompositionOp::OP_DIFFERENCE: + fs << " return abs(dest - src);" << endl; + break; + case gfx::CompositionOp::OP_EXCLUSION: + fs << " return dest + src - 2.0*dest*src;" << endl; + break; + case gfx::CompositionOp::OP_HUE: + fs << " return SetLum(SetSat(src, Sat(dest)), Lum(dest));" << endl; + break; + case gfx::CompositionOp::OP_SATURATION: + fs << " return SetLum(SetSat(dest, Sat(src)), Lum(dest));" << endl; + break; + case gfx::CompositionOp::OP_COLOR: + fs << " return SetLum(src, Lum(dest));" << endl; + break; + case gfx::CompositionOp::OP_LUMINOSITY: + fs << " return SetLum(dest, Lum(src));" << endl; + break; + default: + MOZ_ASSERT_UNREACHABLE("unknown blend mode"); + } + fs << "}" << endl; + + // Generate the mix-blend function the fragment shader will call. + fs << "vec4 mixAndBlend(vec4 backdrop, vec4 color) {" << endl; + + // Shortcut when the backdrop or source alpha is 0, otherwise we may leak + // Infinity into the blend function and return incorrect results. + fs << " if (backdrop.a == 0.0) {" << endl; + fs << " return color;" << endl; + fs << " }" << endl; + fs << " if (color.a == 0.0) {" << endl; + fs << " return vec4(0.0, 0.0, 0.0, 0.0);" << endl; + fs << " }" << endl; + + // The spec assumes there is no premultiplied alpha. The backdrop is always + // premultiplied, so undo the premultiply. If the source is premultiplied we + // must fix that as well. + fs << " backdrop.rgb /= backdrop.a;" << endl; + if (!(aConfig.mFeatures & ENABLE_NO_PREMUL_ALPHA)) { + fs << " color.rgb /= color.a;" << endl; + } + fs << " vec3 blended = blend(backdrop.rgb, color.rgb);" << endl; + fs << " color.rgb = (1.0 - backdrop.a) * color.rgb + backdrop.a * blended.rgb;" << endl; + fs << " color.rgb *= color.a;" << endl; + fs << " return color;" << endl; + fs << "}" << endl; +} + +ShaderProgramOGL::ShaderProgramOGL(GLContext* aGL, const ProgramProfileOGL& aProfile) + : mGL(aGL) + , mProgram(0) + , mProfile(aProfile) + , mProgramState(STATE_NEW) +{ +} + +ShaderProgramOGL::~ShaderProgramOGL() +{ + if (mProgram <= 0) { + return; + } + + RefPtr<GLContext> ctx = mGL->GetSharedContext(); + if (!ctx) { + ctx = mGL; + } + ctx->MakeCurrent(); + ctx->fDeleteProgram(mProgram); +} + +bool +ShaderProgramOGL::Initialize() +{ + NS_ASSERTION(mProgramState == STATE_NEW, "Shader program has already been initialised"); + + ostringstream vs, fs; + for (uint32_t i = 0; i < mProfile.mDefines.Length(); ++i) { + vs << mProfile.mDefines[i] << endl; + fs << mProfile.mDefines[i] << endl; + } + vs << mProfile.mVertexShaderString << endl; + fs << mProfile.mFragmentShaderString << endl; + + if (!CreateProgram(vs.str().c_str(), fs.str().c_str())) { + mProgramState = STATE_ERROR; + return false; + } + + mProgramState = STATE_OK; + + for (uint32_t i = 0; i < KnownUniform::KnownUniformCount; ++i) { + mProfile.mUniforms[i].mLocation = + mGL->fGetUniformLocation(mProgram, mProfile.mUniforms[i].mNameString); + } + + return true; +} + +GLint +ShaderProgramOGL::CreateShader(GLenum aShaderType, const char *aShaderSource) +{ + GLint success, len = 0; + + GLint sh = mGL->fCreateShader(aShaderType); + mGL->fShaderSource(sh, 1, (const GLchar**)&aShaderSource, nullptr); + mGL->fCompileShader(sh); + mGL->fGetShaderiv(sh, LOCAL_GL_COMPILE_STATUS, &success); + mGL->fGetShaderiv(sh, LOCAL_GL_INFO_LOG_LENGTH, (GLint*) &len); + /* Even if compiling is successful, there may still be warnings. Print them + * in a debug build. The > 10 is to catch silly compilers that might put + * some whitespace in the log but otherwise leave it empty. + */ + if (!success +#ifdef DEBUG + || (len > 10 && gfxEnv::DebugShaders()) +#endif + ) + { + nsAutoCString log; + log.SetCapacity(len); + mGL->fGetShaderInfoLog(sh, len, (GLint*) &len, (char*) log.BeginWriting()); + log.SetLength(len); + + if (!success) { + printf_stderr("=== SHADER COMPILATION FAILED ===\n"); + } else { + printf_stderr("=== SHADER COMPILATION WARNINGS ===\n"); + } + + printf_stderr("=== Source:\n%s\n", aShaderSource); + printf_stderr("=== Log:\n%s\n", log.get()); + printf_stderr("============\n"); + + if (!success) { + mGL->fDeleteShader(sh); + return 0; + } + } + + return sh; +} + +bool +ShaderProgramOGL::CreateProgram(const char *aVertexShaderString, + const char *aFragmentShaderString) +{ + GLuint vertexShader = CreateShader(LOCAL_GL_VERTEX_SHADER, aVertexShaderString); + GLuint fragmentShader = CreateShader(LOCAL_GL_FRAGMENT_SHADER, aFragmentShaderString); + + if (!vertexShader || !fragmentShader) + return false; + + GLint result = mGL->fCreateProgram(); + mGL->fAttachShader(result, vertexShader); + mGL->fAttachShader(result, fragmentShader); + + for (Pair<nsCString, GLuint>& attribute : mProfile.mAttributes) { + mGL->fBindAttribLocation(result, attribute.second(), + attribute.first().get()); + } + + mGL->fLinkProgram(result); + + GLint success, len; + mGL->fGetProgramiv(result, LOCAL_GL_LINK_STATUS, &success); + mGL->fGetProgramiv(result, LOCAL_GL_INFO_LOG_LENGTH, (GLint*) &len); + /* Even if linking is successful, there may still be warnings. Print them + * in a debug build. The > 10 is to catch silly compilers that might put + * some whitespace in the log but otherwise leave it empty. + */ + if (!success +#ifdef DEBUG + || (len > 10 && gfxEnv::DebugShaders()) +#endif + ) + { + nsAutoCString log; + log.SetCapacity(len); + mGL->fGetProgramInfoLog(result, len, (GLint*) &len, (char*) log.BeginWriting()); + log.SetLength(len); + + if (!success) { + printf_stderr("=== PROGRAM LINKING FAILED ===\n"); + } else { + printf_stderr("=== PROGRAM LINKING WARNINGS ===\n"); + } + printf_stderr("=== Log:\n%s\n", log.get()); + printf_stderr("============\n"); + } + + // We can mark the shaders for deletion; they're attached to the program + // and will remain attached. + mGL->fDeleteShader(vertexShader); + mGL->fDeleteShader(fragmentShader); + + if (!success) { + mGL->fDeleteProgram(result); + return false; + } + + mProgram = result; + return true; +} + +GLuint +ShaderProgramOGL::GetProgram() +{ + if (mProgramState == STATE_NEW) { + if (!Initialize()) { + NS_WARNING("Shader could not be initialised"); + } + } + MOZ_ASSERT(HasInitialized(), "Attempting to get a program that's not been initialized!"); + return mProgram; +} + +void +ShaderProgramOGL::SetBlurRadius(float aRX, float aRY) +{ + float f[] = {aRX, aRY}; + SetUniform(KnownUniform::BlurRadius, 2, f); + + float gaussianKernel[GAUSSIAN_KERNEL_HALF_WIDTH]; + float sum = 0.0f; + for (int i = 0; i < GAUSSIAN_KERNEL_HALF_WIDTH; i++) { + float x = i * GAUSSIAN_KERNEL_STEP; + float sigma = 1.0f; + gaussianKernel[i] = exp(-x * x / (2 * sigma * sigma)) / sqrt(2 * M_PI * sigma * sigma); + sum += gaussianKernel[i] * (i == 0 ? 1 : 2); + } + for (int i = 0; i < GAUSSIAN_KERNEL_HALF_WIDTH; i++) { + gaussianKernel[i] /= sum; + } + SetArrayUniform(KnownUniform::BlurGaussianKernel, GAUSSIAN_KERNEL_HALF_WIDTH, gaussianKernel); +} + +void +ShaderProgramOGL::SetYUVColorSpace(YUVColorSpace aYUVColorSpace) +{ + float* yuvToRgb = gfxUtils::Get3x3YuvColorMatrix(aYUVColorSpace); + SetMatrix3fvUniform(KnownUniform::YuvColorMatrix, yuvToRgb); +} + +} // namespace layers +} // namespace mozilla |