summaryrefslogtreecommitdiff
path: root/progs/tests/zreaddraw.c
diff options
context:
space:
mode:
Diffstat (limited to 'progs/tests/zreaddraw.c')
-rw-r--r--progs/tests/zreaddraw.c67
1 files changed, 54 insertions, 13 deletions
diff --git a/progs/tests/zreaddraw.c b/progs/tests/zreaddraw.c
index 0821d5fb35..7dfed20cfb 100644
--- a/progs/tests/zreaddraw.c
+++ b/progs/tests/zreaddraw.c
@@ -13,14 +13,16 @@
static GLint WinWidth = 500, WinHeight = 500;
static GLboolean Invert = GL_FALSE;
+static GLboolean TestPacking = GL_FALSE;
+static GLboolean TestList = GL_FALSE;
static void Display(void)
{
- GLfloat depth[100 * 100];
- GLfloat depth2[400 * 400];
- GLfloat min, max;
- int i;
+ GLfloat depth[100 * 100 * 2];
+ GLfloat depth2[400 * 400]; /* *2 to test pixelstore stuff */
+ GLuint list;
+ GLenum depthType = GL_FLOAT;
glClearColor(0.5, 0.5, 0.5, 1.0);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
@@ -36,16 +38,32 @@ static void Display(void)
glLoadIdentity();
glutSolidSphere(1.0, 20, 10);
+ if (TestPacking) {
+ glPixelStorei(GL_PACK_ROW_LENGTH, 120);
+ glPixelStorei(GL_PACK_SKIP_PIXELS, 5);
+ }
+
/* read the depth image */
- glReadPixels(0, 0, 100, 100, GL_DEPTH_COMPONENT, GL_FLOAT, depth);
- min = max = depth[0];
- for (i = 1; i < 100 * 100; i++) {
- if (depth[i] < min)
- min = depth[i];
- if (depth[i] > max)
- max = depth[i];
+ glReadPixels(0, 0, 100, 100, GL_DEPTH_COMPONENT, depthType, depth);
+ if (depthType == GL_FLOAT) {
+ GLfloat min, max;
+ int i;
+ min = max = depth[0];
+ for (i = 1; i < 100 * 100; i++) {
+ if (depth[i] < min)
+ min = depth[i];
+ if (depth[i] > max)
+ max = depth[i];
+ }
+ printf("Depth value range: [%f, %f]\n", min, max);
+ }
+
+ if (TestPacking) {
+ glPixelStorei(GL_PACK_ROW_LENGTH, 0);
+ glPixelStorei(GL_PACK_SKIP_PIXELS, 0);
+ glPixelStorei(GL_UNPACK_ROW_LENGTH, 120);
+ glPixelStorei(GL_UNPACK_SKIP_PIXELS, 5);
}
- printf("Depth value range: [%f, %f]\n", min, max);
/* draw depth image with scaling (into z buffer) */
glPixelZoom(4.0, 4.0);
@@ -55,12 +73,27 @@ static void Display(void)
glPixelTransferf(GL_DEPTH_SCALE, -1.0);
glPixelTransferf(GL_DEPTH_BIAS, 1.0);
}
- glDrawPixels(100, 100, GL_DEPTH_COMPONENT, GL_FLOAT, depth);
+ if (TestList) {
+ list = glGenLists(1);
+ glNewList(list, GL_COMPILE);
+ glDrawPixels(100, 100, GL_DEPTH_COMPONENT, depthType, depth);
+ glEndList();
+ glCallList(list);
+ glDeleteLists(list, 1);
+ }
+ else {
+ glDrawPixels(100, 100, GL_DEPTH_COMPONENT, depthType, depth);
+ }
if (Invert) {
glPixelTransferf(GL_DEPTH_SCALE, 1.0);
glPixelTransferf(GL_DEPTH_BIAS, 0.0);
}
+ if (TestPacking) {
+ glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
+ glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0);
+ }
+
glDisable(GL_DEPTH_TEST);
/* read back scaled depth image */
@@ -89,6 +122,14 @@ static void Key(unsigned char key, int x, int y)
case 'i':
Invert = !Invert;
break;
+ case 'p':
+ TestPacking = !TestPacking;
+ printf("Test pixel pack/unpack: %d\n", TestPacking);
+ break;
+ case 'l':
+ TestList = !TestList;
+ printf("Test dlist: %d\n", TestList);
+ break;
case 27:
exit(0);
break;