The Tor Browser: gfx/layers/opengl/OGLShaderProgram.cpp@6474c204b198 (annotated)

gfx/layers/opengl/OGLShaderProgram.cpp@6474c204b198 (annotated)

gfx/layers/opengl/OGLShaderProgram.cpp

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

 /* 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 "gfxRect.h"                    // for gfxRect
 #include "mozilla/DebugOnly.h"          // for DebugOnly
 #include "nsAString.h"
 #include "nsAutoPtr.h"                  // for nsRefPtr
 #include "nsString.h"                   // for nsAutoCString
 #include "prenv.h"                      // for PR_GetEnv
 #include "Layers.h"
 #include "GLContext.h"
 struct gfxRGBA;
 namespace mozilla {
 namespace layers {
 using namespace std;
 typedef ProgramProfileOGL::Argument Argument;
 #define GAUSSIAN_KERNEL_HALF_WIDTH 11
 #define GAUSSIAN_KERNEL_STEP 0.2
 void
 AddUniforms(ProgramProfileOGL& aProfile)
 {
     static const char *sKnownUniformNames[] = {
         "uLayerTransform",
         "uMaskQuadTransform",
         "uLayerQuadTransform",
         "uMatrixProj",
         "uTextureTransform",
         "uRenderTargetOffset",
         "uLayerOpacity",
         "uTexture",
         "uYTexture",
         "uCbTexture",
         "uCrTexture",
         "uBlackTexture",
         "uWhiteTexture",
         "uMaskTexture",
         "uRenderColor",
         "uTexCoordMultiplier",
         "uTexturePass2",
         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);
 }
 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::SetMask2D(bool aEnabled)
 {
   SetFeature(ENABLE_MASK_2D, aEnabled);
 }
 void
 ShaderConfigOGL::SetMask3D(bool aEnabled)
 {
   SetFeature(ENABLE_MASK_3D, aEnabled);
 }
 /* static */ ProgramProfileOGL
 ProgramProfileOGL::GetProfileFor(ShaderConfigOGL aConfig)
 {
   ProgramProfileOGL result;
   ostringstream fs, vs;
   AddUniforms(result);
   vs << "uniform mat4 uMatrixProj;" << endl;
   vs << "uniform mat4 uLayerQuadTransform;" << endl;
   vs << "uniform mat4 uLayerTransform;" << endl;
   vs << "uniform vec4 uRenderTargetOffset;" << endl;
   vs << "attribute vec4 aVertexCoord;" << endl;
   if (!(aConfig.mFeatures & ENABLE_RENDER_COLOR)) {
     vs << "uniform mat4 uTextureTransform;" << endl;
     vs << "attribute vec2 aTexCoord;" << endl;
     vs << "varying vec2 vTexCoord;" << endl;
   }
   if (aConfig.mFeatures & ENABLE_MASK_2D ||
       aConfig.mFeatures & ENABLE_MASK_3D) {
     vs << "uniform mat4 uMaskQuadTransform;" << endl;
     vs << "varying vec3 vMaskCoord;" << endl;
   }
   vs << "void main() {" << endl;
   vs << "  vec4 finalPosition = aVertexCoord;" << endl;
   vs << "  finalPosition = uLayerQuadTransform * finalPosition;" << endl;
   vs << "  finalPosition = uLayerTransform * finalPosition;" << endl;
   vs << "  finalPosition.xyz /= finalPosition.w;" << endl;
   if (aConfig.mFeatures & ENABLE_MASK_3D) {
     vs << "  vMaskCoord.xy = (uMaskQuadTransform * vec4(finalPosition.xyz, 1.0)).xy;" << endl;
     // correct for perspective correct interpolation, see comment in D3D10 shader
     vs << "  vMaskCoord.z = 1.0;" << endl;
     vs << "  vMaskCoord *= finalPosition.w;" << endl;
   } else if (aConfig.mFeatures & ENABLE_MASK_2D) {
     vs << "  vMaskCoord.xy = (uMaskQuadTransform * finalPosition).xy;" << endl;
   }
   vs << "  finalPosition = finalPosition - uRenderTargetOffset;" << endl;
   vs << "  finalPosition.xyz *= finalPosition.w;" << endl;
   vs << "  finalPosition = uMatrixProj * finalPosition;" << endl;
   if (!(aConfig.mFeatures & ENABLE_RENDER_COLOR)) {
     vs << "  vTexCoord = (uTextureTransform * vec4(aTexCoord.x, aTexCoord.y, 0.0, 1.0)).xy;" << 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 << "#else" << endl;
   fs << "#define COLOR_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;
     }
   }
   const char *sampler2D = "sampler2D";
   const char *texture2D = "texture2D";
   if (aConfig.mFeatures & ENABLE_TEXTURE_RECT) {
     fs << "uniform vec2 uTexCoordMultiplier;" << 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;
   } 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 (aConfig.mFeatures & ENABLE_MASK_2D ||
       aConfig.mFeatures & ENABLE_MASK_3D) {
     fs << "varying vec3 vMaskCoord;" << endl;
     fs << "uniform sampler2D uMaskTexture;" << endl;
   }
   if (!(aConfig.mFeatures & ENABLE_RENDER_COLOR)) {
     fs << "vec4 sample(vec2 coord) {" << endl;
     fs << "  vec4 color;" << endl;
     if (aConfig.mFeatures & ENABLE_TEXTURE_YCBCR) {
       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;
       fs << "  y = (y - 0.0625) * 1.164;" << endl;
       fs << "  cb = cb - 0.5;" << endl;
       fs << "  cr = cr - 0.5;" << endl;
       fs << "  color.r = y + cr * 1.596;" << endl;
       fs << "  color.g = y - 0.813 * cr - 0.391 * cb;" << endl;
       fs << "  color.b = y + cb * 2.018;" << endl;
       fs << "  color.a = 1.0;" << endl;
     } else if (aConfig.mFeatures & ENABLE_TEXTURE_COMPONENT_ALPHA) {
       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 {
       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;" << 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 {
     if (aConfig.mFeatures & ENABLE_TEXTURE_RECT) {
       fs << "  vec4 color = sample(vTexCoord * uTexCoordMultiplier);" << 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_MASK_3D) {
     fs << "  vec2 maskCoords = vMaskCoord.xy / vMaskCoord.z;" << endl;
     fs << "  COLOR_PRECISION float mask = texture2D(uMaskTexture, maskCoords).r;" << endl;
     fs << "  color *= mask;" << endl;
   } else if (aConfig.mFeatures & ENABLE_MASK_2D) {
     fs << "  COLOR_PRECISION float mask = texture2D(uMaskTexture, vMaskCoord.xy).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();
   result.mAttributes.AppendElement(Argument("aVertexCoord"));
   if (aConfig.mFeatures & ENABLE_RENDER_COLOR) {
     result.mTextureCount = 0;
   } else {
     result.mAttributes.AppendElement(Argument("aTexCoord"));
     if (aConfig.mFeatures & ENABLE_TEXTURE_YCBCR) {
       result.mTextureCount = 3;
     } else if (aConfig.mFeatures & ENABLE_TEXTURE_COMPONENT_ALPHA) {
       result.mTextureCount = 2;
     } else {
       result.mTextureCount = 1;
     }
   }
   if (aConfig.mFeatures & ENABLE_MASK_2D ||
       aConfig.mFeatures & ENABLE_MASK_3D) {
     result.mTextureCount = 1;
   }
   return result;
 }
 const char* const ShaderProgramOGL::VertexCoordAttrib = "aVertexCoord";
 const char* const ShaderProgramOGL::TexCoordAttrib = "aTexCoord";
 ShaderProgramOGL::ShaderProgramOGL(GLContext* aGL, const ProgramProfileOGL& aProfile)
   : mGL(aGL)
   , mProgram(0)
   , mProfile(aProfile)
   , mProgramState(STATE_NEW)
 {
 }
 ShaderProgramOGL::~ShaderProgramOGL()
 {
   if (mProgram <= 0) {
     return;
   }
   nsRefPtr<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);
   }
   for (uint32_t i = 0; i < mProfile.mAttributes.Length(); ++i) {
     mProfile.mAttributes[i].mLocation =
       mGL->fGetAttribLocation(mProgram, mProfile.mAttributes[i].mName);
     NS_ASSERTION(mProfile.mAttributes[i].mLocation >= 0, "Bad attribute location.");
   }
   //mProfile.mHasMatrixProj = mProfile.mUniforms[KnownUniform::MatrixProj].mLocation != -1;
   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 && PR_GetEnv("MOZ_DEBUG_SHADERS"))
 #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);
   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 && PR_GetEnv("MOZ_DEBUG_SHADERS"))
 #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;
 }
 void
 ShaderProgramOGL::Activate()
 {
   if (mProgramState == STATE_NEW) {
     if (!Initialize()) {
       NS_WARNING("Shader could not be initialised");
       return;
     }
   }
   NS_ASSERTION(HasInitialized(), "Attempting to activate a program that's not in use!");
   mGL->fUseProgram(mProgram);
 }
 } /* layers */
 } /* mozilla */

The Tor Browser / annotate

gfx/layers/opengl/OGLShaderProgram.cpp@6474c204b198 (annotated)

gfx/layers/opengl/OGLShaderProgram.cpp