// OpenGL ES 2.0 code
#include "Shader.vert"
#include "Shader.frag"
#include
#include
#include
#include
#include
#include
#include
enum {
ATTRIB_VERTEX,
ATTRIB_TEXTURE,
};
static GLuint g_texYId;
static GLuint g_texUId;
static GLuint g_texVId;
static GLuint simpleProgram;
static char * g_buffer = NULL;
static int g_width = 0;
static int g_height = 0;
static void checkGlError(const char* op)
{
GLint error;
for (error = glGetError(); error; error = glGetError())
{
log("error::after %s() glError (0x%x)\n", op, error);
}
}
static GLuint bindTexture(GLuint texture, const char *buffer, GLuint w , GLuint h)
{
// GLuint texture;
// glGenTextures ( 1, &texture );
checkGlError("glGenTextures");
glBindTexture ( GL_TEXTURE_2D, texture );
checkGlError("glBindTexture");
glTexImage2D ( GL_TEXTURE_2D, 0, GL_LUMINANCE, w, h, 0, GL_LUMINANCE, GL_UNSIGNED_BYTE, buffer);
checkGlError("glTexImage2D");
glTexParameteri ( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
checkGlError("glTexParameteri");
glTexParameteri ( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
checkGlError("glTexParameteri");
glTexParameteri ( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE );
checkGlError("glTexParameteri");
glTexParameteri ( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE );
checkGlError("glTexParameteri");
//glBindTexture(GL_TEXTURE_2D, 0);
return texture;
}
static void renderFrame()
{
#if 0
// Galaxy Nexus 4.2.2
static GLfloat squareVertices[] = {
-1.0f, -1.0f,
1.0f, -1.0f,
-1.0f, 1.0f,
1.0f, 1.0f,
};
static GLfloat coordVertices[] = {
0.0f, 1.0f,
1.0f, 1.0f,
0.0f, 0.0f,
1.0f, 0.0f,
};
#else
// HUAWEIG510-0010 4.1.1
static GLfloat squareVertices[] = {
0.0f, 0.0f,
1.0f, 0.0f,
0.0f, 1.0f,
1.0f, 1.0f,
};
static GLfloat coordVertices[] = {
-1.0f, 1.0f,
1.0f, 1.0f,
-1.0f, -1.0f,
1.0f, -1.0f,
};
#endif
glClearColor(0.5f, 0.5f, 0.5f, 1);
checkGlError("glClearColor");
glClear(GL_COLOR_BUFFER_BIT);
checkGlError("glClear");
//PRINTF("setsampler %d %d %d", g_texYId, g_texUId, g_texVId);
GLint tex_y = glGetUniformLocation(simpleProgram, "SamplerY");
checkGlError("glGetUniformLocation");
GLint tex_u = glGetUniformLocation(simpleProgram, "SamplerU");
checkGlError("glGetUniformLocation");
GLint tex_v = glGetUniformLocation(simpleProgram, "SamplerV");
checkGlError("glGetUniformLocation");
glBindAttribLocation(simpleProgram, ATTRIB_VERTEX, "vPosition");
checkGlError("glBindAttribLocation");
glBindAttribLocation(simpleProgram, ATTRIB_TEXTURE, "a_texCoord");
checkGlError("glBindAttribLocation");
glVertexAttribPointer(ATTRIB_VERTEX, 2, GL_FLOAT, 0, 0, squareVertices);
checkGlError("glVertexAttribPointer");
glEnableVertexAttribArray(ATTRIB_VERTEX);
checkGlError("glEnableVertexAttribArray");
glVertexAttribPointer(ATTRIB_TEXTURE, 2, GL_FLOAT, 0, 0, coordVertices);
checkGlError("glVertexAttribPointer");
glEnableVertexAttribArray(ATTRIB_TEXTURE);
checkGlError("glEnableVertexAttribArray");
glActiveTexture(GL_TEXTURE0);
checkGlError("glActiveTexture");
glBindTexture(GL_TEXTURE_2D, g_texYId);
checkGlError("glBindTexture");
glUniform1i(tex_y, 0);
checkGlError("glUniform1i");
glActiveTexture(GL_TEXTURE1);
checkGlError("glActiveTexture");
glBindTexture(GL_TEXTURE_2D, g_texUId);
checkGlError("glBindTexture");
glUniform1i(tex_u, 1);
checkGlError("glUniform1i");
glActiveTexture(GL_TEXTURE2);
checkGlError("glActiveTexture");
glBindTexture(GL_TEXTURE_2D, g_texVId);
checkGlError("glBindTexture");
glUniform1i(tex_v, 2);
checkGlError("glUniform1i");
//glEnable(GL_TEXTURE_2D);
//checkGlError("glEnable");
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
checkGlError("glDrawArrays");
}
static GLuint buildShader(const char* source, GLenum shaderType)
{
GLuint shaderHandle = glCreateShader(shaderType);
if (shaderHandle)
{
glShaderSource(shaderHandle, 1, &source, 0);
glCompileShader(shaderHandle);
GLint compiled = 0;
glGetShaderiv(shaderHandle, GL_COMPILE_STATUS, &compiled);
if (!compiled)
{
GLint infoLen = 0;
glGetShaderiv(shaderHandle, GL_INFO_LOG_LENGTH, &infoLen);
if (infoLen)
{
char* buf = (char*) malloc(infoLen);
if (buf)
{
glGetShaderInfoLog(shaderHandle, infoLen, NULL, buf);
log_easy("error::Could not compile shader %d:\n%s\n", shaderType, buf);
free(buf);
}
glDeleteShader(shaderHandle);
shaderHandle = 0;
}
}
}
return shaderHandle;
}
static GLuint buildProgram(const char* vertexShaderSource,
const char* fragmentShaderSource)
{
GLuint vertexShader = buildShader(vertexShaderSource, GL_VERTEX_SHADER);
GLuint fragmentShader = buildShader(fragmentShaderSource, GL_FRAGMENT_SHADER);
GLuint programHandle = glCreateProgram();
if (programHandle)
{
glAttachShader(programHandle, vertexShader);
checkGlError("glAttachShader");
glAttachShader(programHandle, fragmentShader);
checkGlError("glAttachShader");
glLinkProgram(programHandle);
GLint linkStatus = GL_FALSE;
glGetProgramiv(programHandle, GL_LINK_STATUS, &linkStatus);
if (linkStatus != GL_TRUE) {
GLint bufLength = 0;
glGetProgramiv(programHandle, GL_INFO_LOG_LENGTH, &bufLength);
if (bufLength) {
char* buf = (char*) malloc(bufLength);
if (buf) {
glGetProgramInfoLog(programHandle, bufLength, NULL, buf);
log_easy("error::Could not link program:\n%s\n", buf);
free(buf);
}
}
glDeleteProgram(programHandle);
programHandle = 0;
}
}
return programHandle;
}
static unsigned char * readYUV(const char *path)
{
FILE *fp;
unsigned char * buffer;
long size = 1280 * 720 * 3 / 2;
if((fp=fopen(path,"rb"))==NULL)
{
log("cant open the file");
exit(0);
}
buffer = (unsigned char *)malloc(size);
memset(buffer,'\0',size);
long len = fread(buffer,1,size,fp);
//PRINTF("read data size:%ld", len);
fclose(fp);
return buffer;
}
void gl_initialize()
{
g_buffer = NULL;
simpleProgram = buildProgram(VERTEX_SHADER, FRAG_SHADER);
glUseProgram(simpleProgram);
glGenTextures(1, &g_texYId);
glGenTextures(1, &g_texUId);
glGenTextures(1, &g_texVId);
}
void gl_uninitialize()
{
g_width = 0;
g_height = 0;
if (g_buffer)
{
free(g_buffer);
g_buffer = NULL;
}
}
//设置图像数据
void gl_set_framebuffer(const char* buffer, int buffersize, int width, int height)
{
if (g_width != width || g_height != height)
{
if (g_buffer)
free(g_buffer);
g_width = width;
g_height = height;
g_buffer = (char *)malloc(buffersize);
}
if (g_buffer)
memcpy(g_buffer, buffer, buffersize);
}
//画屏
void gl_render_frame()
{
if (0 == g_width || 0 == g_height)
return;
#if 0
int width = 448;
int height = 336;
static unsigned char *buffer = NULL;
if (NULL == buffer)
{
char filename[128] = {0};
strcpy(filename, "/sdcard/yuv_448_336.yuv");
buffer = readYUV(filename);
}
#else
const char *buffer = g_buffer;
int width = g_width;
int height = g_height;
#endif
glViewport(0, 0, width, height);
bindTexture(g_texYId, buffer, width, height);
bindTexture(g_texUId, buffer + width * height, width/2, height/2);
bindTexture(g_texVId, buffer + width * height * 5 / 4, width/2, height/2);
renderFrame();
}
//如果设置图像数据和画屏是两个线程的话，记住要加锁。
//Shader.frag文件内容
static const char* FRAG_SHADER =
"varying lowp vec2 tc;\n"
"uniform sampler2D SamplerY;\n"
"uniform sampler2D SamplerU;\n"
"uniform sampler2D SamplerV;\n"
"void main(void)\n"
"{\n"
"mediump vec3 yuv;\n"
"lowp vec3 rgb;\n"
"yuv.x = texture2D(SamplerY, tc).r;\n"
"yuv.y = texture2D(SamplerU, tc).r - 0.5;\n"
"yuv.z = texture2D(SamplerV, tc).r - 0.5;\n"
"rgb = mat3( 1, 1, 1,\n"
"0, -0.39465, 2.03211,\n"
"1.13983, -0.58060, 0) * yuv;\n"
"gl_FragColor = vec4(rgb, 1);\n"
"}\n";
//Shader.vert文件内容
static const char* VERTEX_SHADER =
"attribute vec4 vPosition; \n"
"attribute vec2 a_texCoord; \n"
"varying vec2 tc; \n"
"void main() \n"
"{ \n"
" gl_Position = vPosition; \n"
" tc = a_texCoord; \n"
"} \n";
