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Diffstat (limited to 'progs/tests/fbotexture.c')
| -rw-r--r-- | progs/tests/fbotexture.c | 451 |
1 files changed, 0 insertions, 451 deletions
diff --git a/progs/tests/fbotexture.c b/progs/tests/fbotexture.c deleted file mode 100644 index 88d0549c80..0000000000 --- a/progs/tests/fbotexture.c +++ /dev/null @@ -1,451 +0,0 @@ -/* - * Test GL_EXT_framebuffer_object render-to-texture - * - * Draw a teapot into a texture image with stenciling. - * Then draw a textured quad using that texture. - * - * Brian Paul - * 18 Apr 2005 - */ - - -#define GL_GLEXT_PROTOTYPES -#include <GL/glut.h> -#include <assert.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <math.h> - -/* For debug */ -#define DEPTH 1 -#define STENCIL 1 -#define DRAW 1 - - -static int Win = 0; -static int Width = 400, Height = 400; - -static GLenum TexTarget = GL_TEXTURE_2D; /*GL_TEXTURE_RECTANGLE_ARB;*/ -static int TexWidth = 512, TexHeight = 512; -/*static int TexWidth = 600, TexHeight = 600;*/ - -static GLuint MyFB; -static GLuint TexObj; -static GLuint DepthRB, StencilRB; -static GLboolean Anim = GL_FALSE; -static GLfloat Rot = 0.0; -static GLboolean UsePackedDepthStencil = GL_FALSE; -static GLuint TextureLevel = 1; /* which texture level to render to */ -static GLenum TexIntFormat = GL_RGB; /* either GL_RGB or GL_RGBA */ -static GLboolean Cull = GL_FALSE; -static GLboolean Wireframe = GL_FALSE; - - -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); - - /* 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 | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT); - CheckError(__LINE__); - -#if DEPTH - glEnable(GL_DEPTH_TEST); -#endif - -#if STENCIL - glEnable(GL_STENCIL_TEST); - glStencilFunc(GL_NEVER, 1, ~0); - glStencilOp(GL_REPLACE, GL_KEEP, GL_REPLACE); -#endif - - CheckError(__LINE__); - -#if DEPTH || STENCIL - /* draw diamond-shaped stencil pattern */ - glColor3f(0, 1, 0); - glBegin(GL_POLYGON); - glVertex2f(-0.2, 0.0); - glVertex2f( 0.0, -0.2); - glVertex2f( 0.2, 0.0); - glVertex2f( 0.0, 0.2); - glEnd(); -#endif - - /* draw teapot where stencil != 1 */ -#if STENCIL - glStencilFunc(GL_NOTEQUAL, 1, ~0); - glStencilOp(GL_KEEP, GL_KEEP, GL_KEEP); -#endif - - CheckError(__LINE__); - - if (Wireframe) { - glPolygonMode(GL_FRONT, GL_LINE); - } - else { - glPolygonMode(GL_FRONT, GL_FILL); - } - - if (Cull) { - /* cull back */ - glCullFace(GL_BACK); - glEnable(GL_CULL_FACE); - } - else { - glDisable(GL_CULL_FACE); - } - -#if 0 - 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(); -#else - glEnable(GL_LIGHTING); - glEnable(GL_LIGHT0); - glPushMatrix(); - glRotatef(0.5 * Rot, 1.0, 0.0, 0.0); - glFrontFace(GL_CW); /* Teapot patches backward */ - glutSolidTeapot(0.5); - glFrontFace(GL_CCW); - glPopMatrix(); - glDisable(GL_LIGHTING); - /* - PrintStencilHistogram(TexWidth, TexHeight); - */ -#endif - - glDisable(GL_DEPTH_TEST); - glDisable(GL_STENCIL_TEST); - glDisable(GL_CULL_FACE); - glPolygonMode(GL_FRONT_AND_BACK, GL_FILL); - -#if DRAW - /* Bind normal framebuffer */ - glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0); -#endif - - CheckError(__LINE__); -} - - - -static void -Display(void) -{ - float ar = (float) Width / (float) Height; - - RenderTexture(); - - /* draw textured quad in the window */ -#if DRAW - 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); - if (TexTarget == GL_TEXTURE_2D) { - 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); - } - else { - assert(TexTarget == GL_TEXTURE_RECTANGLE_ARB); - glTexCoord2f(0, 0); - glVertex2f(-1, -1); - glTexCoord2f(TexWidth, 0); - glVertex2f(1, -1); - glColor3f(1.0, 1.0, 1.0); - glTexCoord2f(TexWidth, TexHeight); - glVertex2f(1, 1); - glTexCoord2f(0, TexHeight); - glVertex2f(-1, 1); - } - glEnd(); - glPopMatrix(); - glDisable(TexTarget); -#endif - - glutSwapBuffers(); - CheckError(__LINE__); -} - - -static void -Reshape(int width, int height) -{ - glViewport(0, 0, width, height); - Width = width; - Height = height; -} - - -static void -CleanUp(void) -{ -#if DEPTH - glDeleteRenderbuffersEXT(1, &DepthRB); -#endif -#if STENCIL - if (!UsePackedDepthStencil) - glDeleteRenderbuffersEXT(1, &StencilRB); -#endif - 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 'c': - Cull = !Cull; - break; - case 'w': - Wireframe = !Wireframe; - break; - case 's': - Rot += 2.0; - break; - case 'S': - Rot -= 2.0; - break; - case 27: - CleanUp(); - break; - } - glutPostRedisplay(); -} - - -static void -Usage(void) -{ - printf("Usage:\n"); - printf(" a Toggle animation\n"); - printf(" s/s Step/rotate\n"); - printf(" c Toggle back-face culling\n"); - printf(" w Toggle wireframe mode (front-face only)\n"); - printf(" Esc Exit\n"); -} - - -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); - } - - if (argc > 1 && strcmp(argv[1], "-ds") == 0) { - if (!glutExtensionSupported("GL_EXT_packed_depth_stencil")) { - printf("GL_EXT_packed_depth_stencil not found!\n"); - exit(0); - } - UsePackedDepthStencil = GL_TRUE; - printf("Using GL_EXT_packed_depth_stencil\n"); - } - - printf("GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER)); - - /* gen framebuffer id, delete it, do some assertions, just for testing */ - glGenFramebuffersEXT(1, &MyFB); - assert(MyFB); - assert(!glIsFramebufferEXT(MyFB)); - glDeleteFramebuffersEXT(1, &MyFB); - assert(!glIsFramebufferEXT(MyFB)); - /* Note, continue to use MyFB below */ - - glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, MyFB); - assert(glIsFramebufferEXT(MyFB)); - glGetIntegerv(GL_FRAMEBUFFER_BINDING_EXT, &i); - assert(i == MyFB); - - /* Make texture object/image */ - glGenTextures(1, &TexObj); - glBindTexture(TexTarget, TexObj); - /* make two image levels */ - glTexImage2D(TexTarget, 0, TexIntFormat, TexWidth, TexHeight, 0, - GL_RGBA, GL_UNSIGNED_BYTE, NULL); - glTexImage2D(TexTarget, 1, TexIntFormat, TexWidth/2, TexHeight/2, 0, - GL_RGBA, GL_UNSIGNED_BYTE, NULL); - TexWidth = TexWidth >> TextureLevel; - TexHeight = TexHeight >> TextureLevel; - - glTexParameteri(TexTarget, GL_TEXTURE_MIN_FILTER, GL_NEAREST); - glTexParameteri(TexTarget, GL_TEXTURE_MAG_FILTER, GL_NEAREST); - glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE); - glTexParameteri(TexTarget, GL_TEXTURE_BASE_LEVEL, TextureLevel); - glTexParameteri(TexTarget, GL_TEXTURE_MAX_LEVEL, TextureLevel); - - CheckError(__LINE__); - - /* Render color to texture */ - glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, - TexTarget, TexObj, TextureLevel); - - -#if DEPTH - /* make depth renderbuffer */ - glGenRenderbuffersEXT(1, &DepthRB); - assert(DepthRB); - assert(!glIsRenderbufferEXT(DepthRB)); - glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, DepthRB); - assert(glIsRenderbufferEXT(DepthRB)); - if (UsePackedDepthStencil) - glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, GL_DEPTH_STENCIL_EXT, - TexWidth, TexHeight); - else - glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, GL_DEPTH_COMPONENT, - TexWidth, TexHeight); - CheckError(__LINE__); - glGetRenderbufferParameterivEXT(GL_RENDERBUFFER_EXT, - GL_RENDERBUFFER_DEPTH_SIZE_EXT, &i); - CheckError(__LINE__); - printf("Depth renderbuffer size = %d bits\n", i); - assert(i > 0); - - /* attach DepthRB to MyFB */ - glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, - GL_RENDERBUFFER_EXT, DepthRB); -#endif - - CheckError(__LINE__); - -#if STENCIL - if (UsePackedDepthStencil) { - /* DepthRb is a combined depth/stencil renderbuffer */ - glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, - GL_STENCIL_ATTACHMENT_EXT, - GL_RENDERBUFFER_EXT, DepthRB); - } - else { - /* make stencil renderbuffer */ - glGenRenderbuffersEXT(1, &StencilRB); - assert(StencilRB); - assert(!glIsRenderbufferEXT(StencilRB)); - glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, StencilRB); - assert(glIsRenderbufferEXT(StencilRB)); - glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, GL_STENCIL_INDEX, - TexWidth, TexHeight); - /* attach StencilRB to MyFB */ - glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, - GL_STENCIL_ATTACHMENT_EXT, - GL_RENDERBUFFER_EXT, StencilRB); - } - glGetRenderbufferParameterivEXT(GL_RENDERBUFFER_EXT, - GL_RENDERBUFFER_STENCIL_SIZE_EXT, &i); - CheckError(__LINE__); - printf("Stencil renderbuffer size = %d bits\n", i); - assert(i > 0); -#endif - - CheckError(__LINE__); - - /* bind regular framebuffer */ - glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0); - - - /* lighting */ - glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, mat); -} - - -int -main(int argc, char *argv[]) -{ - glutInit(&argc, argv); - glutInitWindowPosition(0, 0); - glutInitWindowSize(Width, Height); - glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE); - Win = glutCreateWindow(argv[0]); - glutReshapeFunc(Reshape); - glutKeyboardFunc(Key); - glutDisplayFunc(Display); - if (Anim) - glutIdleFunc(Idle); - Init(argc, argv); - Usage(); - glutMainLoop(); - return 0; -} |