diff options
Diffstat (limited to 'progs/trivial/tri-fbo-tex.c')
-rw-r--r-- | progs/trivial/tri-fbo-tex.c | 260 |
1 files changed, 0 insertions, 260 deletions
diff --git a/progs/trivial/tri-fbo-tex.c b/progs/trivial/tri-fbo-tex.c deleted file mode 100644 index 72b4cf3683d..00000000000 --- a/progs/trivial/tri-fbo-tex.c +++ /dev/null @@ -1,260 +0,0 @@ -/* Framebuffer object test */ - - -#include <GL/glew.h> -#include <GL/glut.h> -#include <assert.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <math.h> - -/* For debug */ - - -static int Win = 0; -static int Width = 512, Height = 512; - -static GLenum TexTarget = GL_TEXTURE_2D; -static int TexWidth = 512, TexHeight = 512; - -static GLuint MyFB; -static GLuint TexObj; -static GLboolean Anim = GL_FALSE; -static GLfloat Rot = 0.0; -static GLuint TextureLevel = 0; /* which texture level to render to */ -static GLenum TexIntFormat = GL_RGB; /* either GL_RGB or GL_RGBA */ - - -static void -CheckError(int line) -{ - GLenum err = glGetError(); - if (err) { - printf("GL Error 0x%x at line %d\n", (int) err, line); - } -} - - -static void -Idle(void) -{ - Rot = glutGet(GLUT_ELAPSED_TIME) * 0.1; - glutPostRedisplay(); -} - - -static void -RenderTexture(void) -{ - GLenum status; - - glMatrixMode(GL_PROJECTION); - glLoadIdentity(); - glOrtho(-1.0, 1.0, -1.0, 1.0, 5.0, 25.0); - glMatrixMode(GL_MODELVIEW); - glLoadIdentity(); - glTranslatef(0.0, 0.0, -15.0); - - if (1) { - /* draw to texture image */ - glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, MyFB); - - status = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT); - if (status != GL_FRAMEBUFFER_COMPLETE_EXT) { - printf("Framebuffer incomplete!!!\n"); - } - - glViewport(0, 0, TexWidth, TexHeight); - - glClearColor(0.5, 0.5, 1.0, 0.0); - glClear(GL_COLOR_BUFFER_BIT); - - CheckError(__LINE__); - - glBegin(GL_POLYGON); - glColor3f(1, 0, 0); - glVertex2f(-1, -1); - glColor3f(0, 1, 0); - glVertex2f(1, -1); - glColor3f(0, 0, 1); - glVertex2f(0, 1); - glEnd(); - - /* Bind normal framebuffer */ - glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0); - } - else { - } - - CheckError(__LINE__); -} - - - -static void -Display(void) -{ - float ar = (float) Width / (float) Height; - - RenderTexture(); - - /* draw textured quad in the window */ - glMatrixMode(GL_PROJECTION); - glLoadIdentity(); - glFrustum(-ar, ar, -1.0, 1.0, 5.0, 25.0); - glMatrixMode(GL_MODELVIEW); - glLoadIdentity(); - glTranslatef(0.0, 0.0, -7.0); - - glViewport(0, 0, Width, Height); - - glClearColor(0.25, 0.25, 0.25, 0); - glClear(GL_COLOR_BUFFER_BIT); - - glPushMatrix(); - glRotatef(Rot, 0, 1, 0); - glEnable(TexTarget); - glBindTexture(TexTarget, TexObj); - - { - glBegin(GL_POLYGON); - glColor3f(0.25, 0.25, 0.25); - glTexCoord2f(0, 0); - glVertex2f(-1, -1); - glTexCoord2f(1, 0); - glVertex2f(1, -1); - glColor3f(1.0, 1.0, 1.0); - glTexCoord2f(1, 1); - glVertex2f(1, 1); - glTexCoord2f(0, 1); - glVertex2f(-1, 1); - glEnd(); - } - - glPopMatrix(); - glDisable(TexTarget); - - glutSwapBuffers(); - CheckError(__LINE__); -} - - -static void -Reshape(int width, int height) -{ - glViewport(0, 0, width, height); - Width = width; - Height = height; -} - - -static void -CleanUp(void) -{ - glDeleteFramebuffersEXT(1, &MyFB); - - glDeleteTextures(1, &TexObj); - - glutDestroyWindow(Win); - - exit(0); -} - - -static void -Key(unsigned char key, int x, int y) -{ - (void) x; - (void) y; - switch (key) { - case 'a': - Anim = !Anim; - if (Anim) - glutIdleFunc(Idle); - else - glutIdleFunc(NULL); - break; - case 's': - Rot += 2.0; - break; - case 27: - CleanUp(); - break; - } - glutPostRedisplay(); -} - - -static void -Init(int argc, char *argv[]) -{ - static const GLfloat mat[4] = { 1.0, 0.5, 0.5, 1.0 }; - GLint i; - - if (!glutExtensionSupported("GL_EXT_framebuffer_object")) { - printf("GL_EXT_framebuffer_object not found!\n"); - exit(0); - } - - printf("GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER)); - - - /* Make texture object/image */ - glGenTextures(1, &TexObj); - glBindTexture(TexTarget, TexObj); - glTexParameteri(TexTarget, GL_TEXTURE_MIN_FILTER, GL_NEAREST); - glTexParameteri(TexTarget, GL_TEXTURE_MAG_FILTER, GL_NEAREST); - glTexParameteri(TexTarget, GL_TEXTURE_BASE_LEVEL, TextureLevel); - glTexParameteri(TexTarget, GL_TEXTURE_MAX_LEVEL, TextureLevel); - - glTexImage2D(TexTarget, 0, TexIntFormat, TexWidth, TexHeight, 0, - GL_RGBA, GL_UNSIGNED_BYTE, NULL); - - - glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE); - - - - - /* gen framebuffer id, delete it, do some assertions, just for testing */ - glGenFramebuffersEXT(1, &MyFB); - glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, MyFB); - assert(glIsFramebufferEXT(MyFB)); - - - CheckError(__LINE__); - - /* Render color to texture */ - glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, - TexTarget, TexObj, TextureLevel); - - - - CheckError(__LINE__); - - /* bind regular framebuffer */ - glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0); - - -} - - -int -main(int argc, char *argv[]) -{ - glutInit(&argc, argv); - glutInitWindowPosition(0, 0); - glutInitWindowSize(Width, Height); - glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE); - Win = glutCreateWindow(argv[0]); - glewInit(); - glutReshapeFunc(Reshape); - glutKeyboardFunc(Key); - glutDisplayFunc(Display); - if (Anim) - glutIdleFunc(Idle); - Init(argc, argv); - glutMainLoop(); - return 0; -} |