1 files changed, 377 insertions, 0 deletions
diff --git a/gfx/layers/opengl/OGLShaderProgram.h b/gfx/layers/opengl/OGLShaderProgram.h
new file mode 100644
index 0000000000..cfeb7dd23e
--- /dev/null
+++ b/gfx/layers/opengl/OGLShaderProgram.h
@@ -0,0 +1,377 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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/. */
+
+#ifndef GFX_OGLSHADERPROGRAM_H
+#define GFX_OGLSHADERPROGRAM_H
+
+#include <map>
+#include <string>
+#include <utility>
+
+#include "GLContext.h"  // for fast inlines of glUniform*
+#include "mozilla/UniquePtr.h"
+#include "OGLShaderConfig.h"
+
+namespace mozilla {
+namespace layers {
+
+#if defined(DEBUG)
+#  define CHECK_CURRENT_PROGRAM 1
+#  define ASSERT_THIS_PROGRAM                                       \
+    do {                                                            \
+      GLuint currentProgram;                                        \
+      mGL->GetUIntegerv(LOCAL_GL_CURRENT_PROGRAM, &currentProgram); \
+      MOZ_ASSERT(currentProgram == mProgram,                        \
+                 "SetUniform with wrong program active!");          \
+    } while (0)
+#else
+#  define ASSERT_THIS_PROGRAM \
+    do {                      \
+    } while (0)
+#endif
+
+/**
+ * This struct represents the shaders that make up a program and the uniform
+ * and attribute parmeters that those shaders take.
+ * It is used by ShaderProgramOGL.
+ * Use the factory method GetProfileFor to create instances.
+ */
+struct ProgramProfileOGL {
+  /**
+   * Factory method; creates an instance of this class for the given
+   * ShaderConfigOGL
+   */
+  static ProgramProfileOGL GetProfileFor(ShaderConfigOGL aConfig);
+
+  // the source code for the program's shaders
+  std::string mVertexShaderString;
+  std::string mFragmentShaderString;
+
+  // the vertex attributes
+  CopyableTArray<std::pair<nsCString, GLuint>> mAttributes;
+
+  KnownUniform mUniforms[KnownUniform::KnownUniformCount];
+  CopyableTArray<const char*> mDefines;
+  size_t mTextureCount;
+
+  ProgramProfileOGL() : mTextureCount(0) {}
+
+ private:
+  static void BuildMixBlender(const ShaderConfigOGL& aConfig,
+                              std::ostringstream& fs);
+};
+
+/**
+ * Represents an OGL shader program. The details of a program are represented
+ * by a ProgramProfileOGL
+ */
+class ShaderProgramOGL {
+ public:
+  typedef mozilla::gl::GLContext GLContext;
+
+  ShaderProgramOGL(GLContext* aGL, const ProgramProfileOGL& aProfile);
+
+  ~ShaderProgramOGL();
+
+  bool HasInitialized() {
+    NS_ASSERTION(mProgramState != STATE_OK || mProgram > 0,
+                 "Inconsistent program state");
+    return mProgramState == STATE_OK;
+  }
+
+  GLuint GetProgram();
+
+  bool Initialize();
+
+  GLint CreateShader(GLenum aShaderType, const char* aShaderSource);
+
+  /**
+   * Creates a program and stores its id.
+   */
+  bool CreateProgram(const char* aVertexShaderString,
+                     const char* aFragmentShaderString);
+
+  /**
+   * The following set of methods set a uniform argument to the shader program.
+   * Not all uniforms may be set for all programs, and such uses will throw
+   * an assertion.
+   */
+  void SetLayerTransform(const gfx::Matrix4x4& aMatrix) {
+    SetMatrixUniform(KnownUniform::LayerTransform, aMatrix);
+  }
+
+  void SetLayerTransformInverse(const gfx::Matrix4x4& aMatrix) {
+    SetMatrixUniform(KnownUniform::LayerTransformInverse, aMatrix);
+  }
+
+  void SetDEAAEdges(const gfx::Point3D* aEdges) {
+    SetArrayUniform(KnownUniform::SSEdges, 4, aEdges);
+  }
+
+  void SetViewportSize(const gfx::IntSize& aSize) {
+    float vals[2] = {(float)aSize.width, (float)aSize.height};
+    SetUniform(KnownUniform::ViewportSize, 2, vals);
+  }
+
+  void SetVisibleCenter(const gfx::Point& aVisibleCenter) {
+    float vals[2] = {aVisibleCenter.x, aVisibleCenter.y};
+    SetUniform(KnownUniform::VisibleCenter, 2, vals);
+  }
+
+  void SetLayerRects(const gfx::Rect* aRects) {
+    float vals[16] = {
+        aRects[0].X(), aRects[0].Y(), aRects[0].Width(), aRects[0].Height(),
+        aRects[1].X(), aRects[1].Y(), aRects[1].Width(), aRects[1].Height(),
+        aRects[2].X(), aRects[2].Y(), aRects[2].Width(), aRects[2].Height(),
+        aRects[3].X(), aRects[3].Y(), aRects[3].Width(), aRects[3].Height()};
+    SetUniform(KnownUniform::LayerRects, 16, vals);
+  }
+
+  void SetProjectionMatrix(const gfx::Matrix4x4& aMatrix) {
+    SetMatrixUniform(KnownUniform::MatrixProj, aMatrix);
+  }
+
+  // sets this program's texture transform, if it uses one
+  void SetTextureTransform(const gfx::Matrix4x4& aMatrix) {
+    SetMatrixUniform(KnownUniform::TextureTransform, aMatrix);
+  }
+
+  void SetTextureRects(const gfx::Rect* aRects) {
+    float vals[16] = {
+        aRects[0].X(), aRects[0].Y(), aRects[0].Width(), aRects[0].Height(),
+        aRects[1].X(), aRects[1].Y(), aRects[1].Width(), aRects[1].Height(),
+        aRects[2].X(), aRects[2].Y(), aRects[2].Width(), aRects[2].Height(),
+        aRects[3].X(), aRects[3].Y(), aRects[3].Width(), aRects[3].Height()};
+    SetUniform(KnownUniform::TextureRects, 16, vals);
+  }
+
+  void SetRenderOffset(const nsIntPoint& aOffset) {
+    float vals[4] = {float(aOffset.x), float(aOffset.y)};
+    SetUniform(KnownUniform::RenderTargetOffset, 2, vals);
+  }
+
+  void SetRenderOffset(float aX, float aY) {
+    float vals[2] = {aX, aY};
+    SetUniform(KnownUniform::RenderTargetOffset, 2, vals);
+  }
+
+  void SetLayerOpacity(float aOpacity) {
+    SetUniform(KnownUniform::LayerOpacity, aOpacity);
+  }
+
+  void SetTextureUnit(GLint aUnit) { SetUniform(KnownUniform::Texture, aUnit); }
+  void SetYTextureUnit(GLint aUnit) {
+    SetUniform(KnownUniform::YTexture, aUnit);
+  }
+
+  void SetCbTextureUnit(GLint aUnit) {
+    SetUniform(KnownUniform::CbTexture, aUnit);
+  }
+
+  void SetCrTextureUnit(GLint aUnit) {
+    SetUniform(KnownUniform::CrTexture, aUnit);
+  }
+
+  void SetYCbCrTextureUnits(GLint aYUnit, GLint aCbUnit, GLint aCrUnit) {
+    SetUniform(KnownUniform::YTexture, aYUnit);
+    SetUniform(KnownUniform::CbTexture, aCbUnit);
+    SetUniform(KnownUniform::CrTexture, aCrUnit);
+  }
+
+  void SetNV12TextureUnits(GLint aYUnit, GLint aCbCrUnit) {
+    SetUniform(KnownUniform::YTexture, aYUnit);
+    SetUniform(KnownUniform::CbTexture, aCbCrUnit);
+  }
+
+  void SetTexCoordMultiplier(float aWidth, float aHeight) {
+    float f[] = {aWidth, aHeight};
+    SetUniform(KnownUniform::TexCoordMultiplier, 2, f);
+  }
+
+  void SetCbCrTexCoordMultiplier(float aWidth, float aHeight) {
+    float f[] = {aWidth, aHeight};
+    SetUniform(KnownUniform::CbCrTexCoordMultiplier, 2, f);
+  }
+
+  void SetYUVColorSpace(gfx::YUVColorSpace aYUVColorSpace);
+
+  size_t GetTextureCount() const { return mProfile.mTextureCount; }
+
+ protected:
+  RefPtr<GLContext> mGL;
+  // the OpenGL id of the program
+  GLuint mProgram;
+  ProgramProfileOGL mProfile;
+  enum { STATE_NEW, STATE_OK, STATE_ERROR } mProgramState;
+
+#ifdef CHECK_CURRENT_PROGRAM
+  static int sCurrentProgramKey;
+#endif
+
+  void SetUniform(KnownUniform::KnownUniformName aKnownUniform,
+                  float aFloatValue) {
+    ASSERT_THIS_PROGRAM;
+    NS_ASSERTION(
+        aKnownUniform >= 0 && aKnownUniform < KnownUniform::KnownUniformCount,
+        "Invalid known uniform");
+
+    KnownUniform& ku(mProfile.mUniforms[aKnownUniform]);
+    if (ku.UpdateUniform(aFloatValue)) {
+      mGL->fUniform1f(ku.mLocation, aFloatValue);
+    }
+  }
+
+  void SetUniform(KnownUniform::KnownUniformName aKnownUniform,
+                  const gfx::DeviceColor& aColor) {
+    ASSERT_THIS_PROGRAM;
+    NS_ASSERTION(
+        aKnownUniform >= 0 && aKnownUniform < KnownUniform::KnownUniformCount,
+        "Invalid known uniform");
+
+    KnownUniform& ku(mProfile.mUniforms[aKnownUniform]);
+    if (ku.UpdateUniform(aColor.r, aColor.g, aColor.b, aColor.a)) {
+      mGL->fUniform4fv(ku.mLocation, 1, ku.mValue.f16v);
+    }
+  }
+
+  void SetUniform(KnownUniform::KnownUniformName aKnownUniform, int aLength,
+                  const float* aFloatValues) {
+    ASSERT_THIS_PROGRAM;
+    NS_ASSERTION(
+        aKnownUniform >= 0 && aKnownUniform < KnownUniform::KnownUniformCount,
+        "Invalid known uniform");
+
+    KnownUniform& ku(mProfile.mUniforms[aKnownUniform]);
+    if (ku.UpdateUniform(aLength, aFloatValues)) {
+      switch (aLength) {
+        case 1:
+          mGL->fUniform1fv(ku.mLocation, 1, ku.mValue.f16v);
+          break;
+        case 2:
+          mGL->fUniform2fv(ku.mLocation, 1, ku.mValue.f16v);
+          break;
+        case 3:
+          mGL->fUniform3fv(ku.mLocation, 1, ku.mValue.f16v);
+          break;
+        case 4:
+          mGL->fUniform4fv(ku.mLocation, 1, ku.mValue.f16v);
+          break;
+        case 16:
+          mGL->fUniform4fv(ku.mLocation, 4, ku.mValue.f16v);
+          break;
+        default:
+          MOZ_ASSERT_UNREACHABLE("Bogus aLength param");
+      }
+    }
+  }
+
+  void SetArrayUniform(KnownUniform::KnownUniformName aKnownUniform,
+                       int aLength, float* aFloatValues) {
+    ASSERT_THIS_PROGRAM;
+    NS_ASSERTION(
+        aKnownUniform >= 0 && aKnownUniform < KnownUniform::KnownUniformCount,
+        "Invalid known uniform");
+
+    KnownUniform& ku(mProfile.mUniforms[aKnownUniform]);
+    if (ku.UpdateArrayUniform(aLength, aFloatValues)) {
+      mGL->fUniform1fv(ku.mLocation, aLength, ku.mValue.f16v);
+    }
+  }
+
+  void SetArrayUniform(KnownUniform::KnownUniformName aKnownUniform,
+                       int aLength, const gfx::Point3D* aPointValues) {
+    ASSERT_THIS_PROGRAM;
+    NS_ASSERTION(
+        aKnownUniform >= 0 && aKnownUniform < KnownUniform::KnownUniformCount,
+        "Invalid known uniform");
+
+    KnownUniform& ku(mProfile.mUniforms[aKnownUniform]);
+    if (ku.UpdateArrayUniform(aLength, aPointValues)) {
+      mGL->fUniform3fv(ku.mLocation, aLength, ku.mValue.f16v);
+    }
+  }
+
+  void SetUniform(KnownUniform::KnownUniformName aKnownUniform,
+                  GLint aIntValue) {
+    ASSERT_THIS_PROGRAM;
+    NS_ASSERTION(
+        aKnownUniform >= 0 && aKnownUniform < KnownUniform::KnownUniformCount,
+        "Invalid known uniform");
+
+    KnownUniform& ku(mProfile.mUniforms[aKnownUniform]);
+    if (ku.UpdateUniform(aIntValue)) {
+      mGL->fUniform1i(ku.mLocation, aIntValue);
+    }
+  }
+
+  void SetMatrixUniform(KnownUniform::KnownUniformName aKnownUniform,
+                        const float* aFloatValues) {
+    ASSERT_THIS_PROGRAM;
+    NS_ASSERTION(
+        aKnownUniform >= 0 && aKnownUniform < KnownUniform::KnownUniformCount,
+        "Invalid known uniform");
+
+    KnownUniform& ku(mProfile.mUniforms[aKnownUniform]);
+    if (ku.UpdateUniform(16, aFloatValues)) {
+      mGL->fUniformMatrix4fv(ku.mLocation, 1, false, ku.mValue.f16v);
+    }
+  }
+
+  void SetMatrix3fvUniform(KnownUniform::KnownUniformName aKnownUniform,
+                           const float* aFloatValues) {
+    ASSERT_THIS_PROGRAM;
+    NS_ASSERTION(
+        aKnownUniform >= 0 && aKnownUniform < KnownUniform::KnownUniformCount,
+        "Invalid known uniform");
+
+    KnownUniform& ku(mProfile.mUniforms[aKnownUniform]);
+    if (ku.UpdateUniform(9, aFloatValues)) {
+      mGL->fUniformMatrix3fv(ku.mLocation, 1, false, ku.mValue.f16v);
+    }
+  }
+
+  void SetVec3fvUniform(KnownUniform::KnownUniformName aKnownUniform,
+                        const float* aFloatValues) {
+    ASSERT_THIS_PROGRAM;
+    NS_ASSERTION(
+        aKnownUniform >= 0 && aKnownUniform < KnownUniform::KnownUniformCount,
+        "Invalid known uniform");
+
+    KnownUniform& ku(mProfile.mUniforms[aKnownUniform]);
+    if (ku.UpdateUniform(3, aFloatValues)) {
+      mGL->fUniform3fv(ku.mLocation, 1, ku.mValue.f16v);
+    }
+  }
+
+  void SetMatrixUniform(KnownUniform::KnownUniformName aKnownUniform,
+                        const gfx::Matrix4x4& aMatrix) {
+    SetMatrixUniform(aKnownUniform, &aMatrix._11);
+  }
+};
+
+class ShaderProgramOGLsHolder final {
+ public:
+  NS_INLINE_DECL_REFCOUNTING(ShaderProgramOGLsHolder)
+
+  explicit ShaderProgramOGLsHolder(gl::GLContext* aGL);
+
+  ShaderProgramOGL* GetShaderProgramFor(const ShaderConfigOGL& aConfig);
+  void Clear();
+  ShaderProgramOGL* ActivateProgram(const ShaderConfigOGL& aConfig);
+  void ResetCurrentProgram();
+
+ protected:
+  ~ShaderProgramOGLsHolder();
+
+  const RefPtr<gl::GLContext> mGL;
+  std::map<ShaderConfigOGL, UniquePtr<ShaderProgramOGL>> mPrograms;
+  ShaderProgramOGL* mCurrentProgram = nullptr;
+};
+
+}  // namespace layers
+}  // namespace mozilla
+
+#endif  // GFX_OGLSHADERPROGRAM_H