progs/tests: added new blitfb.c test
Tests glBlitFramebuffer() between two texture/renderbuffer surfaces. In particular, blit from level[1] of a cube map face to a 2D texture. Used to find/fix bug in intel do_copy_texsubimage(). See commit aef1ab1073f3e30d699b99dae17518ed48b57c72
This commit is contained in:
Brian Paul
parent
3e45788d5d
commit
3bee7610be
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@ -29,6 +29,7 @@ SOURCES = \
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blendminmax.c \
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blendsquare.c \
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blendxor.c \
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blitfb.c \
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bufferobj.c \
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bumpmap.c \
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bug_3050.c \
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@ -52,6 +52,7 @@ progs = [
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'blendminmax',
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'blendsquare',
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'blendxor',
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'blitfb',
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'bufferobj',
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'bug_3050',
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'bug_3101',
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@ -0,0 +1,259 @@
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/**
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* Test glFramebufferBlit()
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* Brian Paul
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* 27 Oct 2009
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*/
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#include <assert.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <math.h>
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#include <GL/glew.h>
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#include <GL/glut.h>
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static int Win;
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static int WinWidth = 1100, WinHeight = 600;
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static int SrcWidth = 512, SrcHeight = 512;
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static int DstWidth = 512, DstHeight = 512;
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static GLuint SrcFB, DstFB;
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static GLuint SrcTex, DstTex;
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#if 0
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static GLenum SrcTexTarget = GL_TEXTURE_2D, SrcTexFace = GL_TEXTURE_2D;
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#else
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static GLenum SrcTexTarget = GL_TEXTURE_CUBE_MAP, SrcTexFace = GL_TEXTURE_CUBE_MAP_POSITIVE_X;
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#endif
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static GLenum DstTexTarget = GL_TEXTURE_2D, DstTexFace = GL_TEXTURE_2D;
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static GLuint SrcTexLevel = 01, DstTexLevel = 0;
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static void
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Draw(void)
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{
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GLboolean rp = GL_FALSE;
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GLubyte *buf;
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GLint srcWidth = SrcWidth >> SrcTexLevel;
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GLint srcHeight = SrcHeight >> SrcTexLevel;
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GLint dstWidth = DstWidth >> DstTexLevel;
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GLint dstHeight = DstHeight >> DstTexLevel;
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GLenum status;
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/* clear window */
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glBindFramebufferEXT(GL_FRAMEBUFFER, 0);
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glClearColor(0.5, 0.5, 0.5, 1.0);
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glClear(GL_COLOR_BUFFER_BIT);
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/* clear src buf */
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glBindFramebufferEXT(GL_FRAMEBUFFER, SrcFB);
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status = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT);
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assert(status == GL_FRAMEBUFFER_COMPLETE_EXT);
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glClearColor(0, 1, 0, 0);
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glClear(GL_COLOR_BUFFER_BIT);
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/* clear dst buf */
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glBindFramebufferEXT(GL_FRAMEBUFFER, DstFB);
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status = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT);
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assert(status == GL_FRAMEBUFFER_COMPLETE_EXT);
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glClearColor(1, 0, 0, 0);
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glClear(GL_COLOR_BUFFER_BIT);
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/* blit src -> dst */
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glBindFramebufferEXT(GL_READ_FRAMEBUFFER, SrcFB);
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glBindFramebufferEXT(GL_DRAW_FRAMEBUFFER, DstFB);
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glBlitFramebufferEXT(0, 0, srcWidth, srcHeight,
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0, 0, dstWidth, dstHeight,
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GL_COLOR_BUFFER_BIT, GL_NEAREST);
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#if 01
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/* read src results */
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buf = malloc(4 * srcWidth * srcHeight);
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memset(buf, 0x88, 4 * srcWidth * srcHeight);
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glBindFramebufferEXT(GL_FRAMEBUFFER, SrcFB);
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if (rp)
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glReadPixels(0, 0, srcWidth, srcHeight, GL_RGBA, GL_UNSIGNED_BYTE, buf);
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else {
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glBindTexture(SrcTexTarget, SrcTex);
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glGetTexImage(SrcTexFace, SrcTexLevel, GL_RGBA, GL_UNSIGNED_BYTE, buf);
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}
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/* draw dst in window */
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glBindFramebufferEXT(GL_FRAMEBUFFER, 0);
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glWindowPos2i(0, 0);
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glDrawPixels(srcWidth, srcHeight, GL_RGBA, GL_UNSIGNED_BYTE, buf);
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printf("Src Pix[0] = %d %d %d %d\n", buf[0], buf[1], buf[2], buf[3]);
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free(buf);
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#endif
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glFinish();
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/* read dst results */
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buf = malloc(4 * dstWidth * dstHeight);
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memset(buf, 0x88, 4 * dstWidth * dstHeight);
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glBindFramebufferEXT(GL_FRAMEBUFFER, DstFB);
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if (rp)
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glReadPixels(0, 0, dstWidth, dstHeight, GL_RGBA, GL_UNSIGNED_BYTE, buf);
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else {
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glBindTexture(DstTexTarget, DstTex);
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glGetTexImage(DstTexFace, DstTexLevel, GL_RGBA, GL_UNSIGNED_BYTE, buf);
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}
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/* draw dst in window */
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glBindFramebufferEXT(GL_FRAMEBUFFER, 0);
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glWindowPos2i(srcWidth + 2, 0);
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glDrawPixels(dstWidth, dstHeight, GL_RGBA, GL_UNSIGNED_BYTE, buf);
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printf("Dst Pix[0] = %d %d %d %d\n", buf[0], buf[1], buf[2], buf[3]);
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free(buf);
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glFinish();
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glutSwapBuffers();
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}
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static void
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Reshape(int width, int height)
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{
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WinWidth = width;
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WinHeight = height;
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glViewport(0, 0, width, height);
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glMatrixMode(GL_PROJECTION);
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glLoadIdentity();
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glFrustum(-1.0, 1.0, -1.0, 1.0, 5.0, 25.0);
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glMatrixMode(GL_MODELVIEW);
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glLoadIdentity();
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glTranslatef(0.0, 0.0, -15.0);
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}
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static void
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Key(unsigned char key, int x, int y)
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{
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(void) x;
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(void) y;
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switch (key) {
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case 27:
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glutDestroyWindow(Win);
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exit(0);
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break;
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}
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glutPostRedisplay();
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}
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static void
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SpecialKey(int key, int x, int y)
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{
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(void) x;
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(void) y;
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switch (key) {
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}
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glutPostRedisplay();
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}
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static void
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InitFBOs(void)
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{
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GLuint w, h, lvl;
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/* Src */
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glGenTextures(1, &SrcTex);
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glBindTexture(SrcTexTarget, SrcTex);
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w = SrcWidth;
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h = SrcHeight;
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lvl = 0;
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for (lvl = 0; ; lvl++) {
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if (SrcTexTarget == GL_TEXTURE_CUBE_MAP) {
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GLuint f;
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for (f = 0; f < 6; f++) {
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glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + f, lvl, GL_RGBA8,
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w, h, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
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}
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}
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else {
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/* single face */
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glTexImage2D(SrcTexFace, lvl, GL_RGBA8, w, h, 0,
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GL_RGBA, GL_UNSIGNED_BYTE, NULL);
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}
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if (w == 1 && h == 1)
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break;
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if (w > 1)
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w /= 2;
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if (h > 1)
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h /= 2;
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}
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glGenFramebuffersEXT(1, &SrcFB);
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glBindFramebufferEXT(GL_FRAMEBUFFER, SrcFB);
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glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT,
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SrcTexFace, SrcTex, SrcTexLevel);
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/* Dst */
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glGenTextures(1, &DstTex);
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glBindTexture(DstTexTarget, DstTex);
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w = DstWidth;
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h = DstHeight;
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lvl = 0;
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for (lvl = 0; ; lvl++) {
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glTexImage2D(DstTexFace, lvl, GL_RGBA8, w, h, 0,
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GL_RGBA, GL_UNSIGNED_BYTE, NULL);
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if (w == 1 && h == 1)
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break;
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if (w > 1)
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w /= 2;
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if (h > 1)
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h /= 2;
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}
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glGenFramebuffersEXT(1, &DstFB);
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glBindFramebufferEXT(GL_FRAMEBUFFER, DstFB);
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glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT,
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DstTexFace, DstTex, DstTexLevel);
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}
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static void
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Init(void)
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{
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if (!glutExtensionSupported("GL_EXT_framebuffer_object")) {
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fprintf(stderr, "This test requires GL_EXT_framebuffer_object\n");
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exit(1);
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}
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if (!glutExtensionSupported("GL_EXT_framebuffer_blit")) {
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fprintf(stderr, "This test requires GL_EXT_framebuffer_blit,\n");
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exit(1);
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}
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InitFBOs();
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printf("Left rect = src FBO, Right rect = dst FBO.\n");
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printf("Both should be green.\n");
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}
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int
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main(int argc, char *argv[])
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{
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glutInit(&argc, argv);
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glutInitWindowSize(WinWidth, WinHeight);
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glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
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Win = glutCreateWindow(argv[0]);
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glewInit();
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glutReshapeFunc(Reshape);
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glutKeyboardFunc(Key);
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glutSpecialFunc(SpecialKey);
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glutDisplayFunc(Draw);
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Init();
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glutMainLoop();
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return 0;
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}
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