diff options
Diffstat (limited to 'progs/trivial')
| -rw-r--r-- | progs/trivial/clear-fbo-scissor.c | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/progs/trivial/clear-fbo-scissor.c b/progs/trivial/clear-fbo-scissor.c index 5ec0b57328b..28c613ccfba 100644 --- a/progs/trivial/clear-fbo-scissor.c +++ b/progs/trivial/clear-fbo-scissor.c @@ -11,6 +11,7 @@ #include <string.h> #include <GL/glew.h> #include <GL/glut.h> +#include <GL/glu.h> static int Width = 512, Height = 512; @@ -18,12 +19,20 @@ static GLuint MyFB, MyRB; static GLboolean UseTex = GL_FALSE; -#define CheckError() assert(glGetError() == 0) +#define CheckError() \ + do { \ + GLenum err = glGetError(); \ + if (err != GL_NO_ERROR) \ + printf("Error: %s\n", gluErrorString(err)); \ + assert(err == GL_NO_ERROR); \ + } while (0) static void Init(void) { + GLenum status; + fprintf(stderr, "GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER)); fprintf(stderr, "GL_VERSION = %s\n", (char *) glGetString(GL_VERSION)); fprintf(stderr, "GL_VENDOR = %s\n", (char *) glGetString(GL_VENDOR)); @@ -45,6 +54,8 @@ Init(void) glBindTexture(GL_TEXTURE_2D, tex); glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, Width, Height, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, GL_TEXTURE_2D, tex, 0); @@ -59,6 +70,11 @@ Init(void) glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, GL_RGB, Width, Height); } + status = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT); + if (status != GL_FRAMEBUFFER_COMPLETE_EXT) { + fprintf(stderr, "Framebuffer object is incomplete (0x%x)!\n", status); + } + glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0); } @@ -134,6 +150,8 @@ Draw(void) glClear(GL_COLOR_BUFFER_BIT); } + CheckError(); + /* gray triangle in middle, pointing up */ glColor3f(0.5, 0.5, 0.5); glBegin(GL_TRIANGLES); |