1 files changed, 144 insertions, 0 deletions
diff --git a/services/surfaceflinger/RenderEngine/Program.cpp b/services/surfaceflinger/RenderEngine/Program.cpp
new file mode 100644
index 0000000..586d1ad
--- /dev/null
+++ b/services/surfaceflinger/RenderEngine/Program.cpp
@@ -0,0 +1,144 @@
+/*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;
+
+        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.mTextureMatrix);
+    }
+    if (mAlphaPlaneLoc >= 0) {
+        glUniform1f(mAlphaPlaneLoc, desc.mPlaneAlpha);
+    }
+    if (mColorLoc >= 0) {
+        glUniform4fv(mColorLoc, 1, desc.mColor);
+    }
+    // these uniforms are always present
+    glUniformMatrix4fv(mProjectionMatrixLoc, 1, GL_FALSE, desc.mProjectionMatrix);
+}
+
+} /* namespace android */