diff options
Diffstat (limited to 'libs/hwui/Program.cpp')
| -rw-r--r-- | libs/hwui/Program.cpp | 110 |
1 files changed, 71 insertions, 39 deletions
diff --git a/libs/hwui/Program.cpp b/libs/hwui/Program.cpp index 043a092..984461c 100644 --- a/libs/hwui/Program.cpp +++ b/libs/hwui/Program.cpp @@ -25,80 +25,107 @@ namespace uirenderer { // Base program /////////////////////////////////////////////////////////////////////////////// -Program::Program(const char* vertex, const char* fragment) { +// TODO: Program instance should be created from a factory method +Program::Program(const ProgramDescription& description, const char* vertex, const char* fragment) { mInitialized = false; + mHasColorUniform = false; + mHasSampler = false; + mUse = false; - vertexShader = buildShader(vertex, GL_VERTEX_SHADER); - if (vertexShader) { + // No need to cache compiled shaders, rely instead on Android's + // persistent shaders cache + mVertexShader = buildShader(vertex, GL_VERTEX_SHADER); + if (mVertexShader) { + mFragmentShader = buildShader(fragment, GL_FRAGMENT_SHADER); + if (mFragmentShader) { + mProgramId = glCreateProgram(); - fragmentShader = buildShader(fragment, GL_FRAGMENT_SHADER); - if (fragmentShader) { + glAttachShader(mProgramId, mVertexShader); + glAttachShader(mProgramId, mFragmentShader); - id = glCreateProgram(); - glAttachShader(id, vertexShader); - glAttachShader(id, fragmentShader); - glLinkProgram(id); + position = bindAttrib("position", kBindingPosition); + if (description.hasTexture || description.hasExternalTexture) { + texCoords = bindAttrib("texCoords", kBindingTexCoords); + } else { + texCoords = -1; + } + + glLinkProgram(mProgramId); GLint status; - glGetProgramiv(id, GL_LINK_STATUS, &status); + glGetProgramiv(mProgramId, GL_LINK_STATUS, &status); if (status != GL_TRUE) { ALOGE("Error while linking shaders:"); GLint infoLen = 0; - glGetProgramiv(id, GL_INFO_LOG_LENGTH, &infoLen); + glGetProgramiv(mProgramId, GL_INFO_LOG_LENGTH, &infoLen); if (infoLen > 1) { GLchar log[infoLen]; - glGetProgramInfoLog(id, infoLen, 0, &log[0]); + glGetProgramInfoLog(mProgramId, infoLen, 0, &log[0]); ALOGE("%s", log); } - glDeleteShader(vertexShader); - glDeleteShader(fragmentShader); - glDeleteProgram(id); + + glDetachShader(mProgramId, mVertexShader); + glDetachShader(mProgramId, mFragmentShader); + + glDeleteShader(mVertexShader); + glDeleteShader(mFragmentShader); + + glDeleteProgram(mProgramId); } else { mInitialized = true; } + } else { + glDeleteShader(mVertexShader); } } - mUse = false; - if (mInitialized) { - position = addAttrib("position"); transform = addUniform("transform"); } } Program::~Program() { if (mInitialized) { - glDeleteShader(vertexShader); - glDeleteShader(fragmentShader); - glDeleteProgram(id); + glDetachShader(mProgramId, mVertexShader); + glDetachShader(mProgramId, mFragmentShader); + + glDeleteShader(mVertexShader); + glDeleteShader(mFragmentShader); + + glDeleteProgram(mProgramId); } } int Program::addAttrib(const char* name) { - int slot = glGetAttribLocation(id, name); - attributes.add(name, slot); + int slot = glGetAttribLocation(mProgramId, name); + mAttributes.add(name, slot); return slot; } +int Program::bindAttrib(const char* name, ShaderBindings bindingSlot) { + glBindAttribLocation(mProgramId, bindingSlot, name); + mAttributes.add(name, bindingSlot); + return bindingSlot; +} + int Program::getAttrib(const char* name) { - ssize_t index = attributes.indexOfKey(name); + ssize_t index = mAttributes.indexOfKey(name); if (index >= 0) { - return attributes.valueAt(index); + return mAttributes.valueAt(index); } return addAttrib(name); } int Program::addUniform(const char* name) { - int slot = glGetUniformLocation(id, name); - uniforms.add(name, slot); + int slot = glGetUniformLocation(mProgramId, name); + mUniforms.add(name, slot); return slot; } int Program::getUniform(const char* name) { - ssize_t index = uniforms.indexOfKey(name); + ssize_t index = mUniforms.indexOfKey(name); if (index >= 0) { - return uniforms.valueAt(index); + return mUniforms.valueAt(index); } return addUniform(name); } @@ -127,10 +154,11 @@ void Program::set(const mat4& projectionMatrix, const mat4& modelViewMatrix, const mat4& transformMatrix, bool offset) { mat4 t(projectionMatrix); if (offset) { - // offset screenspace xy by an amount that compensates for typical precision issues - // in GPU hardware that tends to paint hor/vert lines in pixels shifted up and to the left. - // This offset value is based on an assumption that some hardware may use as little - // as 12.4 precision, so we offset by slightly more than 1/16. + // offset screenspace xy by an amount that compensates for typical precision + // issues in GPU hardware that tends to paint hor/vert lines in pixels shifted + // up and to the left. + // This offset value is based on an assumption that some hardware may use as + // little as 12.4 precision, so we offset by slightly more than 1/16. t.translate(.375, .375, 0); } t.multiply(transformMatrix); @@ -140,20 +168,24 @@ void Program::set(const mat4& projectionMatrix, const mat4& modelViewMatrix, } void Program::setColor(const float r, const float g, const float b, const float a) { - glUniform4f(getUniform("color"), r, g, b, a); + if (!mHasColorUniform) { + mColorUniform = getUniform("color"); + mHasColorUniform = true; + } + glUniform4f(mColorUniform, r, g, b, a); } void Program::use() { - glUseProgram(id); + glUseProgram(mProgramId); + if (texCoords >= 0 && !mHasSampler) { + glUniform1i(getUniform("sampler"), 0); + mHasSampler = true; + } mUse = true; - - glEnableVertexAttribArray(position); } void Program::remove() { mUse = false; - - glDisableVertexAttribArray(position); } }; // namespace uirenderer |