| /*Gluint |
| * Copyright 2013 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #include <stdint.h> |
| |
| #include <log/log.h> |
| |
| #include "Program.h" |
| #include "ProgramCache.h" |
| #include "Description.h" |
| #include <utils/String8.h> |
| |
| namespace android { |
| |
| Program::Program(const ProgramCache::Key& /*needs*/, const char* vertex, const char* fragment) |
| : mInitialized(false) { |
| GLuint vertexId = buildShader(vertex, GL_VERTEX_SHADER); |
| GLuint fragmentId = buildShader(fragment, GL_FRAGMENT_SHADER); |
| GLuint programId = glCreateProgram(); |
| glAttachShader(programId, vertexId); |
| glAttachShader(programId, fragmentId); |
| glBindAttribLocation(programId, position, "position"); |
| glBindAttribLocation(programId, texCoords, "texCoords"); |
| glLinkProgram(programId); |
| |
| GLint status; |
| glGetProgramiv(programId, GL_LINK_STATUS, &status); |
| if (status != GL_TRUE) { |
| ALOGE("Error while linking shaders:"); |
| GLint infoLen = 0; |
| glGetProgramiv(programId, GL_INFO_LOG_LENGTH, &infoLen); |
| if (infoLen > 1) { |
| GLchar log[infoLen]; |
| glGetProgramInfoLog(programId, infoLen, 0, &log[0]); |
| ALOGE("%s", log); |
| } |
| glDetachShader(programId, vertexId); |
| glDetachShader(programId, fragmentId); |
| glDeleteShader(vertexId); |
| glDeleteShader(fragmentId); |
| glDeleteProgram(programId); |
| } else { |
| mProgram = programId; |
| mVertexShader = vertexId; |
| mFragmentShader = fragmentId; |
| mInitialized = true; |
| |
| mColorMatrixLoc = glGetUniformLocation(programId, "colorMatrix"); |
| mProjectionMatrixLoc = glGetUniformLocation(programId, "projection"); |
| mTextureMatrixLoc = glGetUniformLocation(programId, "texture"); |
| mSamplerLoc = glGetUniformLocation(programId, "sampler"); |
| mColorLoc = glGetUniformLocation(programId, "color"); |
| mAlphaPlaneLoc = glGetUniformLocation(programId, "alphaPlane"); |
| |
| // set-up the default values for our uniforms |
| glUseProgram(programId); |
| const GLfloat m[16] = {1,0,0,0, 0,1,0,0, 0,0,1,0, 0,0,0,1 }; |
| glUniformMatrix4fv(mProjectionMatrixLoc, 1, GL_FALSE, m); |
| glEnableVertexAttribArray(0); |
| } |
| } |
| |
| Program::~Program() { |
| } |
| |
| bool Program::isValid() const { |
| return mInitialized; |
| } |
| |
| void Program::use() { |
| glUseProgram(mProgram); |
| } |
| |
| GLuint Program::getAttrib(const char* name) const { |
| // TODO: maybe use a local cache |
| return glGetAttribLocation(mProgram, name); |
| } |
| |
| GLint Program::getUniform(const char* name) const { |
| // TODO: maybe use a local cache |
| return glGetUniformLocation(mProgram, name); |
| } |
| |
| GLuint Program::buildShader(const char* source, GLenum type) { |
| GLuint shader = glCreateShader(type); |
| glShaderSource(shader, 1, &source, 0); |
| glCompileShader(shader); |
| GLint status; |
| glGetShaderiv(shader, GL_COMPILE_STATUS, &status); |
| if (status != GL_TRUE) { |
| // Some drivers return wrong values for GL_INFO_LOG_LENGTH |
| // use a fixed size instead |
| GLchar log[512]; |
| glGetShaderInfoLog(shader, sizeof(log), 0, log); |
| ALOGE("Error while compiling shader: \n%s\n%s", source, log); |
| glDeleteShader(shader); |
| return 0; |
| } |
| return shader; |
| } |
| |
| String8& Program::dumpShader(String8& result, GLenum /*type*/) { |
| GLuint shader = GL_FRAGMENT_SHADER ? mFragmentShader : mVertexShader; |
| GLint l; |
| glGetShaderiv(shader, GL_SHADER_SOURCE_LENGTH, &l); |
| char* src = new char[l]; |
| glGetShaderSource(shader, l, NULL, src); |
| result.append(src); |
| delete [] src; |
| return result; |
| } |
| |
| void Program::setUniforms(const Description& desc) { |
| |
| // TODO: we should have a mechanism here to not always reset uniforms that |
| // didn't change for this program. |
| |
| if (mSamplerLoc >= 0) { |
| glUniform1i(mSamplerLoc, 0); |
| glUniformMatrix4fv(mTextureMatrixLoc, 1, GL_FALSE, desc.mTexture.getMatrix().asArray()); |
| } |
| if (mAlphaPlaneLoc >= 0) { |
| glUniform1f(mAlphaPlaneLoc, desc.mPlaneAlpha); |
| } |
| if (mColorLoc >= 0) { |
| glUniform4fv(mColorLoc, 1, desc.mColor); |
| } |
| if (mColorMatrixLoc >= 0) { |
| glUniformMatrix4fv(mColorMatrixLoc, 1, GL_FALSE, desc.mColorMatrix.asArray()); |
| } |
| // these uniforms are always present |
| glUniformMatrix4fv(mProjectionMatrixLoc, 1, GL_FALSE, desc.mProjectionMatrix.asArray()); |
| } |
| |
| } /* namespace android */ |