diff options
| -rw-r--r-- | progs/trivial/clear-fbo-scissor.c | 38 |
1 files changed, 33 insertions, 5 deletions
diff --git a/progs/trivial/clear-fbo-scissor.c b/progs/trivial/clear-fbo-scissor.c index b0d9651772..5ec0b57328 100644 --- a/progs/trivial/clear-fbo-scissor.c +++ b/progs/trivial/clear-fbo-scissor.c @@ -15,6 +15,7 @@ static int Width = 512, Height = 512; static GLuint MyFB, MyRB; +static GLboolean UseTex = GL_FALSE; #define CheckError() assert(glGetError() == 0) @@ -38,12 +39,25 @@ Init(void) glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, MyFB); - glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, MyRB); + if (UseTex) { + GLuint tex; + glGenTextures(1, &tex); + glBindTexture(GL_TEXTURE_2D, tex); + glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, Width, Height, 0, + GL_RGBA, GL_UNSIGNED_BYTE, NULL); + glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, + GL_COLOR_ATTACHMENT0_EXT, + GL_TEXTURE_2D, tex, 0); + } + else { + glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, MyRB); - glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, - GL_RENDERBUFFER_EXT, MyRB); + glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, + GL_COLOR_ATTACHMENT0_EXT, + GL_RENDERBUFFER_EXT, MyRB); - glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, GL_RGB, Width, Height); + glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, GL_RGB, Width, Height); + } glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0); } @@ -60,7 +74,9 @@ Reshape(int width, int height) Width = width; Height = height; - glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, GL_RGB, Width, Height); + if (!UseTex) { + glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, GL_RGB, Width, Height); + } } @@ -167,11 +183,23 @@ Draw(void) int main(int argc, char *argv[]) { + int i; + glutInit(&argc, argv); glutInitWindowPosition(100, 0); glutInitWindowSize(Width, Height); glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE); + for (i = 1; i < argc; i++) { + if (strcmp(argv[i], "-t") == 0) + UseTex = GL_TRUE; + } + + if (UseTex) + printf("Using render to texture\n"); + else + printf("Using user-created render buffer\n"); + if (!glutCreateWindow(argv[0])) { exit(1); } |