fix simple-es2 to save back buffer to disk
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caoxiong
parent
67d5b5737e
commit
22e1a81574
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@ -17,6 +17,7 @@
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#include <stdbool.h>
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#include <threads.h>
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#include <sys/time.h>
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#include <signal.h>
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#include "GLES2/gl2.h"
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@ -53,6 +54,9 @@ GLuint g_hProjMatrixLoc = 0;
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GLuint g_hVertexLoc = 0;
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GLuint g_hColorLoc = 1;
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int fbo_width = 800;
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int fbo_height = 600;
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#define ASSERT_EQ(exp1, exp2) do { auto e1 = (exp1);auto e2 = (exp2);\
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if((e1) != (e2)) { \
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printf("assert value: %p, %p\n", e1, e2); \
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@ -116,7 +120,7 @@ float VertexPositions[] =
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void render(float w, float h)
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{
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static int ttt = 0;
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// Clear the colorbuffer and depth-buffer
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glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
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glViewport(0, 0, w, h);
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@ -132,7 +136,7 @@ void render(float w, float h)
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// Rotate and translate the model view matrix
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matModelView[ 0] = 1.0;
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matModelView[ 2] = 0.0f;
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matModelView[ 2] = sinf((ttt++)*0.3);
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matModelView[ 5] = 1.0f;
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matModelView[ 8] = 0.0f;
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matModelView[10] = 0.0f;
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@ -179,11 +183,12 @@ EGLDisplay gbm_init(const char* devicePath) {
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return eglGetDisplay(gbmDevice);
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}
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#define PRINT_ERR(_str) { int _ret = glGetError();if ((_ret)!=GL_NO_ERROR) {printf(_str " ret: 0x%x\n", _ret);} }
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void fbo_test() {
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int width = 800;
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int height = 600;
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uint32_t ret;
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// 创建并绑定帧缓冲对象
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glGenFramebuffers(1, &framebuffer);
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@ -194,17 +199,21 @@ void fbo_test() {
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glBindRenderbuffer(GL_RENDERBUFFER, renderbuffer);
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// 分配存储空间
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glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT, width, height);
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glRenderbufferStorage(GL_RENDERBUFFER, GL_RGBA, fbo_width, fbo_height);
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// PRINT_ERR("glRenderbufferStorage");
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// 将渲染缓冲对象附着到帧缓冲的深度和模板附着点
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glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, renderbuffer);
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glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_RENDERBUFFER, renderbuffer);
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// PRINT_ERR("glFramebufferRenderbuffer");
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// 创建并绑定纹理对象用于颜色附着点
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glGenTextures(1, &texId);
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glBindTexture(GL_TEXTURE_2D, texId);
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// 分配存储空间
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glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
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glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, fbo_width, fbo_height, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
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// PRINT_ERR("glTexImage2D");
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// 设置纹理参数
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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@ -215,6 +224,7 @@ void fbo_test() {
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// 将纹理对象附着到帧缓冲的颜色附着点
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glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, texId, 0);
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// PRINT_ERR("glFramebufferTexture2D");
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// 检查 FBO 完整性
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GLenum status = glCheckFramebufferStatus(GL_FRAMEBUFFER);
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@ -265,7 +275,7 @@ int init(void)
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}
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int configIndex = matchConfigToVisual(egldisplay, GBM_FORMAT_XRGB8888, configs, numConfigs);
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int configIndex = matchConfigToVisual(egldisplay, GBM_FORMAT_ARGB8888, configs, numConfigs);
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if (configIndex < 0)
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{
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fprintf(stderr, "Failed to find matching EGL config! Error: 0x%x\n", eglGetError());
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@ -475,24 +485,18 @@ void writeToFile(const char* filename, unsigned char* data, long dataLen) {
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}
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}
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#define DURATION(_t1, _t2) (((_t1).tv_usec - (_t2).tv_usec))
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int main (void)
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{
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EGLint width = 800;
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EGLint height = 600;
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// init_signal();
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init();
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// eglQuerySurface(egldisplay, eglsurface, EGL_WIDTH, &width);
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// eglQuerySurface(egldisplay, eglsurface, EGL_HEIGHT, &height);
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printf("w=%d h=%d\n", fbo_width, fbo_height);
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printf("w=%d h=%d\n",width,height);
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// thrd_t thr;
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// thrd_create(&thr, event_handle, NULL);
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unsigned char* buffer = (unsigned char*)malloc(width * height * 4);
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unsigned char* buffer = (unsigned char*)malloc(fbo_width * fbo_height * 4);
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fbo_test();
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struct timeval start, end;
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while (1) {
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glBindTexture(GL_TEXTURE_2D, texId);
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@ -500,14 +504,19 @@ int main (void)
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glBindTexture(GL_TEXTURE_2D, 0);
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// glBindFramebuffer(GL_FRAMEBUFFER, framebuffer);
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render(width,height);
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gettimeofday(&start, NULL);
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render(fbo_width, fbo_height);
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gettimeofday(&end, NULL);
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printf("render time: %ldus, %.1lf fps\n", DURATION(end, start), (1000000.0/(DURATION(end, start))));
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// printf("render time: %ldms, %.1f fps\n", (end - start), (1000.0/(end - start)));
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// glBindFramebuffer(GL_FRAMEBUFFER, 0);
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printf("glReadPixels start \n");
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glBindFramebuffer(GL_READ_FRAMEBUFFER, framebuffer);
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glReadPixels( 0, 0, width, height, GL_RGBA, GL_UNSIGNED_BYTE, buffer );
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glReadPixels( 0, 0, fbo_width, fbo_height, GL_RGBA, GL_UNSIGNED_BYTE, buffer );
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glBindFramebuffer(GL_READ_FRAMEBUFFER, 0);
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printf("glReadPixels end \n");
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writeToFile("image.rgba", buffer, width * height * 4);
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writeToFile("image.rgba", buffer, fbo_width * fbo_height * 4);
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// eglSwapBuffers(egldisplay, eglsurface);
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sleep(1);
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}
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