Add m-esr52 at 52.6.0

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