suite/pts/deviceTests/opengl/jni/graphics/GLUtils.cpp - platform/cts - Git at Google

 /*
  * Copyright (C) 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 "GLUtils.h"
 #include <stdlib.h>
 #include <sys/time.h>

 #include <android/asset_manager_jni.h>

 #define LOG_TAG "PTS_OPENGL"
 #define LOG_NDEBUG 0
 #include <utils/Log.h>

 static JNIEnv* sEnv = NULL;
 static jobject sAssetManager = NULL;

 void GLUtils::setEnvAndAssetManager(JNIEnv* env, jobject assetManager) {
     sEnv = env;
     sAssetManager = assetManager;
 }

 static AAsset* loadAsset(const char* path) {
     AAssetManager* nativeManager = AAssetManager_fromJava(sEnv, sAssetManager);
     if (nativeManager == NULL) {
         return NULL;
     }
     return AAssetManager_open(nativeManager, path, AASSET_MODE_UNKNOWN);;
 }

 char* GLUtils::openTextFile(const char* path) {
     AAsset* asset = loadAsset(path);
     if (asset == NULL) {
         ALOGE("Couldn't load %s", path);
         return NULL;
     }
     off_t length = AAsset_getLength(asset);
     char* buffer = new char[length + 1];
     int num = AAsset_read(asset, buffer, length);
     AAsset_close(asset);
     if (num != length) {
         ALOGE("Couldn't read %s", path);
         delete[] buffer;
         return NULL;
     }
     buffer[length] = '\0';
     return buffer;
 }

 GLuint GLUtils::loadTexture(const char* path) {
     GLuint textureId = 0;
     jclass activityClass = sEnv->FindClass("com/android/pts/opengl/reference/GLGameActivity");
     if (activityClass == NULL) {
         ALOGE("Couldn't find activity class");
         return -1;
     }
     jmethodID loadTexture = sEnv->GetStaticMethodID(activityClass, "loadTexture",
             "(Landroid/content/res/AssetManager;Ljava/lang/String;)I");
     if (loadTexture == NULL) {
         ALOGE("Couldn't find loadTexture method");
         return -1;
     }
     jstring pathStr = sEnv->NewStringUTF(path);
     textureId = sEnv->CallStaticIntMethod(activityClass, loadTexture, sAssetManager, pathStr);
     sEnv->DeleteLocalRef(pathStr);
     return textureId;
 }

 static int readInt(char* b) {
     return (((int) b[0]) << 24) | (((int) b[1]) << 16) | (((int) b[2]) << 8) | ((int) b[3]);
 }

 static float readFloat(char* b) {
     union {
         int input;
         float output;
     } data;
     data.input = readInt(b);
     return data.output;
 }

 Mesh* GLUtils::loadMesh(const char* path) {
     char* buffer = openTextFile(path);
     if (buffer == NULL) {
         return NULL;
     }
     int index = 0;
     int numVertices = readInt(buffer + index);
     index += 4;
     float* vertices = new float[numVertices * 3];
     float* normals = new float[numVertices * 3];
     float* texCoords = new float[numVertices * 2];
     for (int i = 0; i < numVertices; i++) {
         // Vertices
         int vIndex = i * 3;
         vertices[vIndex + 0] = readFloat(buffer + index);
         index += 4;
         vertices[vIndex + 1] = readFloat(buffer + index);
         index += 4;
         vertices[vIndex + 2] = readFloat(buffer + index);
         index += 4;
         // Normals
         normals[vIndex + 0] = readFloat(buffer + index);
         index += 4;
         normals[vIndex + 1] = readFloat(buffer + index);
         index += 4;
         normals[vIndex + 2] = readFloat(buffer + index);
         index += 4;
         // Texture Coordinates
         int tIndex = i * 2;
         texCoords[tIndex + 0] = readFloat(buffer + index);
         index += 4;
         texCoords[tIndex + 1] = readFloat(buffer + index);
         index += 4;
     }
     return new Mesh(vertices, normals, texCoords, numVertices);
 }

 // Loads the given source code as a shader of the given type.
 static GLuint loadShader(GLenum shaderType, const char** source) {
     GLuint shader = glCreateShader(shaderType);
     if (shader) {
         glShaderSource(shader, 1, source, NULL);
         glCompileShader(shader);
         GLint compiled = 0;
         glGetShaderiv(shader, GL_COMPILE_STATUS, &compiled);
         if (!compiled) {
             GLint infoLen = 0;
             glGetShaderiv(shader, GL_INFO_LOG_LENGTH, &infoLen);
             if (infoLen > 0) {
                 char* infoLog = (char*) malloc(sizeof(char) * infoLen);
                 glGetShaderInfoLog(shader, infoLen, NULL, infoLog);
                 ALOGE("Error compiling shader:\n%s\n", infoLog);
                 free(infoLog);
             }
             glDeleteShader(shader);
             shader = 0;
         }
     }
     return shader;
 }

 GLuint GLUtils::createProgram(const char** vertexSource, const char** fragmentSource) {
     GLuint vertexShader = loadShader(GL_VERTEX_SHADER, vertexSource);
     if (!vertexShader) {
         return 0;
     }

     GLuint fragmentShader = loadShader(GL_FRAGMENT_SHADER, fragmentSource);
     if (!fragmentShader) {
         return 0;
     }

     GLuint program = glCreateProgram();
     if (program) {
         glAttachShader(program, vertexShader);
         glAttachShader(program, fragmentShader);

         GLint linkStatus;
         glLinkProgram(program);
         glGetProgramiv(program, GL_LINK_STATUS, &linkStatus);

         if (!linkStatus) {
             GLint infoLen = 0;
             glGetProgramiv(program, GL_INFO_LOG_LENGTH, &infoLen);
             if (infoLen > 0) {
                 char* infoLog = (char*) malloc(sizeof(char) * infoLen);
                 glGetProgramInfoLog(program, infoLen, NULL, infoLog);
                 ALOGE("Error linking program:\n%s\n", infoLog);
                 free(infoLog);
             }
             glDeleteProgram(program);
             program = 0;
         }
     }
     return program;
 }

 double GLUtils::currentTimeMillis() {
     struct timeval tv;
     gettimeofday(&tv, (struct timezone *) NULL);
     return tv.tv_sec * 1000.0 + tv.tv_usec / 1000.0;
 }

 // Rounds a number up to the smallest power of 2 that is greater than the original number.
 int GLUtils::roundUpToSmallestPowerOf2(int x) {
     if (x < 0) {
         return 0;
     }
     --x;
     x |= x >> 1;
     x |= x >> 2;
     x |= x >> 4;
     x |= x >> 8;
     x |= x >> 16;
     return x + 1;
 }

 GLuint GLUtils::genTexture(int texWidth, int texHeight, int fill) {
     GLuint textureId = 0;
     int w = roundUpToSmallestPowerOf2(texWidth);
     int h = roundUpToSmallestPowerOf2(texHeight);
     uint32_t* m = new uint32_t[w * h];
     if (m != NULL) {
         uint32_t* d = m;
         for (int y = 0; y < h; y++) {
             for (int x = 0; x < w; x++) {
                 if (fill == RANDOM_FILL) {
                     *d = 0xff000000 | ((y & 0xff) << 16) | ((x & 0xff) << 8) | ((x + y) & 0xff);
                 } else {
                     *d = 0xff000000 | fill;
                 }
                 d++;
             }
         }
         glGenTextures(1, &textureId);
         glBindTexture(GL_TEXTURE_2D, textureId);
         glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, w, h, 0, GL_RGBA, GL_UNSIGNED_BYTE, m);
         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
     }
     delete[] m;
     return textureId;
 }

 bool GLUtils::createFBO(GLuint& fboId, GLuint& rboId, GLuint& cboId, int width, int height) {
     glGenFramebuffers(1, &fboId);
     glBindFramebuffer(GL_FRAMEBUFFER, fboId);

     glGenRenderbuffers(1, &rboId);
     glBindRenderbuffer(GL_RENDERBUFFER, rboId);
     glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT16, width, height);
     glBindRenderbuffer(GL_RENDERBUFFER, 0);
     glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, rboId);

     glGenRenderbuffers(1, &cboId);
     glBindRenderbuffer(GL_RENDERBUFFER, cboId);
     glRenderbufferStorage(GL_RENDERBUFFER, GL_RGB565, width, height);
     glBindRenderbuffer(GL_RENDERBUFFER, 0);
     glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_RENDERBUFFER, cboId);

     GLuint err = glGetError();
     if (err != GL_NO_ERROR) {
         ALOGE("GLError %d", err);
         return false;
     }

     return glCheckFramebufferStatus(GL_FRAMEBUFFER) == GL_FRAMEBUFFER_COMPLETE;
 }
	/*
	* Copyright (C) 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 "GLUtils.h"
	#include <stdlib.h>
	#include <sys/time.h>

	#include <android/asset_manager_jni.h>

	#define LOG_TAG "PTS_OPENGL"
	#define LOG_NDEBUG 0
	#include <utils/Log.h>

	static JNIEnv* sEnv = NULL;
	static jobject sAssetManager = NULL;

	void GLUtils::setEnvAndAssetManager(JNIEnv* env, jobject assetManager) {
	sEnv = env;
	sAssetManager = assetManager;
	}

	static AAsset* loadAsset(const char* path) {
	AAssetManager* nativeManager = AAssetManager_fromJava(sEnv, sAssetManager);
	if (nativeManager == NULL) {
	return NULL;
	}
	return AAssetManager_open(nativeManager, path, AASSET_MODE_UNKNOWN);;
	}

	char* GLUtils::openTextFile(const char* path) {
	AAsset* asset = loadAsset(path);
	if (asset == NULL) {
	ALOGE("Couldn't load %s", path);
	return NULL;
	}
	off_t length = AAsset_getLength(asset);
	char* buffer = new char[length + 1];
	int num = AAsset_read(asset, buffer, length);
	AAsset_close(asset);
	if (num != length) {
	ALOGE("Couldn't read %s", path);
	delete[] buffer;
	return NULL;
	}
	buffer[length] = '\0';
	return buffer;
	}

	GLuint GLUtils::loadTexture(const char* path) {
	GLuint textureId = 0;
	jclass activityClass = sEnv->FindClass("com/android/pts/opengl/reference/GLGameActivity");
	if (activityClass == NULL) {
	ALOGE("Couldn't find activity class");
	return -1;
	}
	jmethodID loadTexture = sEnv->GetStaticMethodID(activityClass, "loadTexture",
	"(Landroid/content/res/AssetManager;Ljava/lang/String;)I");
	if (loadTexture == NULL) {
	ALOGE("Couldn't find loadTexture method");
	return -1;
	}
	jstring pathStr = sEnv->NewStringUTF(path);
	textureId = sEnv->CallStaticIntMethod(activityClass, loadTexture, sAssetManager, pathStr);
	sEnv->DeleteLocalRef(pathStr);
	return textureId;
	}

	static int readInt(char* b) {
	return (((int) b[0]) << 24) \| (((int) b[1]) << 16) \| (((int) b[2]) << 8) \| ((int) b[3]);
	}

	static float readFloat(char* b) {
	union {
	int input;
	float output;
	} data;
	data.input = readInt(b);
	return data.output;
	}

	Mesh* GLUtils::loadMesh(const char* path) {
	char* buffer = openTextFile(path);
	if (buffer == NULL) {
	return NULL;
	}
	int index = 0;
	int numVertices = readInt(buffer + index);
	index += 4;
	float* vertices = new float[numVertices * 3];
	float* normals = new float[numVertices * 3];
	float* texCoords = new float[numVertices * 2];
	for (int i = 0; i < numVertices; i++) {
	// Vertices
	int vIndex = i * 3;
	vertices[vIndex + 0] = readFloat(buffer + index);
	index += 4;
	vertices[vIndex + 1] = readFloat(buffer + index);
	index += 4;
	vertices[vIndex + 2] = readFloat(buffer + index);
	index += 4;
	// Normals
	normals[vIndex + 0] = readFloat(buffer + index);
	index += 4;
	normals[vIndex + 1] = readFloat(buffer + index);
	index += 4;
	normals[vIndex + 2] = readFloat(buffer + index);
	index += 4;
	// Texture Coordinates
	int tIndex = i * 2;
	texCoords[tIndex + 0] = readFloat(buffer + index);
	index += 4;
	texCoords[tIndex + 1] = readFloat(buffer + index);
	index += 4;
	}
	return new Mesh(vertices, normals, texCoords, numVertices);
	}

	// Loads the given source code as a shader of the given type.
	static GLuint loadShader(GLenum shaderType, const char** source) {
	GLuint shader = glCreateShader(shaderType);
	if (shader) {
	glShaderSource(shader, 1, source, NULL);
	glCompileShader(shader);
	GLint compiled = 0;
	glGetShaderiv(shader, GL_COMPILE_STATUS, &compiled);
	if (!compiled) {
	GLint infoLen = 0;
	glGetShaderiv(shader, GL_INFO_LOG_LENGTH, &infoLen);
	if (infoLen > 0) {
	char* infoLog = (char) malloc(sizeof(char) infoLen);
	glGetShaderInfoLog(shader, infoLen, NULL, infoLog);
	ALOGE("Error compiling shader:\n%s\n", infoLog);
	free(infoLog);
	}
	glDeleteShader(shader);
	shader = 0;
	}
	}
	return shader;
	}

	GLuint GLUtils::createProgram(const char vertexSource, const char fragmentSource) {
	GLuint vertexShader = loadShader(GL_VERTEX_SHADER, vertexSource);
	if (!vertexShader) {
	return 0;
	}

	GLuint fragmentShader = loadShader(GL_FRAGMENT_SHADER, fragmentSource);
	if (!fragmentShader) {
	return 0;
	}

	GLuint program = glCreateProgram();
	if (program) {
	glAttachShader(program, vertexShader);
	glAttachShader(program, fragmentShader);

	GLint linkStatus;
	glLinkProgram(program);
	glGetProgramiv(program, GL_LINK_STATUS, &linkStatus);

	if (!linkStatus) {
	GLint infoLen = 0;
	glGetProgramiv(program, GL_INFO_LOG_LENGTH, &infoLen);
	if (infoLen > 0) {
	char* infoLog = (char) malloc(sizeof(char) infoLen);
	glGetProgramInfoLog(program, infoLen, NULL, infoLog);
	ALOGE("Error linking program:\n%s\n", infoLog);
	free(infoLog);
	}
	glDeleteProgram(program);
	program = 0;
	}
	}
	return program;
	}

	double GLUtils::currentTimeMillis() {
	struct timeval tv;
	gettimeofday(&tv, (struct timezone *) NULL);
	return tv.tv_sec * 1000.0 + tv.tv_usec / 1000.0;
	}

	// Rounds a number up to the smallest power of 2 that is greater than the original number.
	int GLUtils::roundUpToSmallestPowerOf2(int x) {
	if (x < 0) {
	return 0;
	}
	--x;
	x \|= x >> 1;
	x \|= x >> 2;
	x \|= x >> 4;
	x \|= x >> 8;
	x \|= x >> 16;
	return x + 1;
	}

	GLuint GLUtils::genTexture(int texWidth, int texHeight, int fill) {
	GLuint textureId = 0;
	int w = roundUpToSmallestPowerOf2(texWidth);
	int h = roundUpToSmallestPowerOf2(texHeight);
	uint32_t* m = new uint32_t[w * h];
	if (m != NULL) {
	uint32_t* d = m;
	for (int y = 0; y < h; y++) {
	for (int x = 0; x < w; x++) {
	if (fill == RANDOM_FILL) {
	*d = 0xff000000 \| ((y & 0xff) << 16) \| ((x & 0xff) << 8) \| ((x + y) & 0xff);
	} else {
	*d = 0xff000000 \| fill;
	}
	d++;
	}
	}
	glGenTextures(1, &textureId);
	glBindTexture(GL_TEXTURE_2D, textureId);
	glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, w, h, 0, GL_RGBA, GL_UNSIGNED_BYTE, m);
	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
	}
	delete[] m;
	return textureId;
	}

	bool GLUtils::createFBO(GLuint& fboId, GLuint& rboId, GLuint& cboId, int width, int height) {
	glGenFramebuffers(1, &fboId);
	glBindFramebuffer(GL_FRAMEBUFFER, fboId);

	glGenRenderbuffers(1, &rboId);
	glBindRenderbuffer(GL_RENDERBUFFER, rboId);
	glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT16, width, height);
	glBindRenderbuffer(GL_RENDERBUFFER, 0);
	glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, rboId);

	glGenRenderbuffers(1, &cboId);
	glBindRenderbuffer(GL_RENDERBUFFER, cboId);
	glRenderbufferStorage(GL_RENDERBUFFER, GL_RGB565, width, height);
	glBindRenderbuffer(GL_RENDERBUFFER, 0);
	glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_RENDERBUFFER, cboId);

	GLuint err = glGetError();
	if (err != GL_NO_ERROR) {
	ALOGE("GLError %d", err);
	return false;
	}

	return glCheckFramebufferStatus(GL_FRAMEBUFFER) == GL_FRAMEBUFFER_COMPLETE;
	}