2
* Measure glTexSubImage and glCopyTexSubImage speed
15
static GLint WinWidth = 1024, WinHeight = 512;
16
static GLint TexWidth = 512, TexHeight = 512;
18
static GLuint TexObj = 1;
20
static GLenum IntFormat = GL_RGBA8;
21
static GLenum ReadFormat = GL_RGBA; /* for glReadPixels */
23
static GLboolean DrawQuad = GL_TRUE;
27
* draw teapot image, size TexWidth by TexHeight
34
glViewport(0, 0, TexWidth, TexHeight);
35
glScissor(0, 0, TexWidth, TexHeight);
36
glEnable(GL_SCISSOR_TEST);
38
glClearColor(0.5, 0.5, 0.5, 0.0);
39
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
41
ar = (float) TexWidth / TexHeight;
43
glMatrixMode(GL_PROJECTION);
45
glFrustum(-ar, ar, -1.0, 1.0, 5.0, 25.0);
46
glMatrixMode(GL_MODELVIEW);
48
glEnable(GL_LIGHTING);
50
glEnable(GL_DEPTH_TEST);
53
glRotatef(45, 1, 0, 0);
54
glRotatef(45, 0, 1, 0);
58
glDisable(GL_DEPTH_TEST);
59
glDisable(GL_LIGHTING);
61
glDisable(GL_SCISSOR_TEST);
63
glViewport(0, 0, WinWidth, WinHeight);
69
* Do glCopyTexSubImage2D call (update texture with framebuffer data)
70
* If doSubRect is true, do the copy in four pieces instead of all at once.
73
DoCopyTex(GLboolean doSubRect)
76
/* copy in four parts */
77
int w = TexWidth / 2, h = TexHeight / 2;
81
glCopyTexSubImage2D(GL_TEXTURE_2D, 0, x0, y0, x0, y0, w, h);
82
glCopyTexSubImage2D(GL_TEXTURE_2D, 0, x1, y0, x1, y0, w, h);
83
glCopyTexSubImage2D(GL_TEXTURE_2D, 0, x0, y1, x0, y1, w, h);
84
glCopyTexSubImage2D(GL_TEXTURE_2D, 0, x1, y1, x1, y1, w, h);
87
glCopyTexSubImage2D(GL_TEXTURE_2D, 0, x0, y0, x1, y1, w, h);
88
glCopyTexSubImage2D(GL_TEXTURE_2D, 0, x1, y0, x0, y1, w, h);
89
glCopyTexSubImage2D(GL_TEXTURE_2D, 0, x0, y1, x1, y0, w, h);
90
glCopyTexSubImage2D(GL_TEXTURE_2D, 0, x1, y1, x0, y0, w, h);
94
glCopyTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 0, 0, TexWidth, TexHeight);
100
* Do glTexSubImage2D (update texture w/ user data)
101
* If doSubRect, do update in four pieces, else all at once.
104
SubTex(GLboolean doSubRect, const GLubyte *image)
108
int w = TexWidth / 2, h = TexHeight / 2;
111
glPixelStorei(GL_UNPACK_ROW_LENGTH, TexWidth);
112
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
114
glPixelStorei(GL_UNPACK_SKIP_ROWS, y0);
115
glPixelStorei(GL_UNPACK_SKIP_PIXELS, x0);
116
glTexSubImage2D(GL_TEXTURE_2D, 0, x0, y0, w, h,
117
ReadFormat, GL_UNSIGNED_BYTE, image);
119
glPixelStorei(GL_UNPACK_SKIP_ROWS, y0);
120
glPixelStorei(GL_UNPACK_SKIP_PIXELS, x1);
121
glTexSubImage2D(GL_TEXTURE_2D, 0, x1, y0, w, h,
122
ReadFormat, GL_UNSIGNED_BYTE, image);
124
glPixelStorei(GL_UNPACK_SKIP_ROWS, y1);
125
glPixelStorei(GL_UNPACK_SKIP_PIXELS, x0);
126
glTexSubImage2D(GL_TEXTURE_2D, 0, x0, y1, w, h,
127
ReadFormat, GL_UNSIGNED_BYTE, image);
129
glPixelStorei(GL_UNPACK_SKIP_ROWS, y1);
130
glPixelStorei(GL_UNPACK_SKIP_PIXELS, x1);
131
glTexSubImage2D(GL_TEXTURE_2D, 0, x1, y1, w, h,
132
ReadFormat, GL_UNSIGNED_BYTE, image);
136
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, TexWidth, TexHeight,
137
ReadFormat, GL_UNSIGNED_BYTE, image);
143
* Measure gl[Copy]TexSubImage rate.
144
* This actually also includes time to render a quad and SwapBuffers.
147
RunTest(GLboolean copyTex, GLboolean doSubRect)
151
float copyRate, mbRate;
155
GLubyte *image = NULL;
157
glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_RED_SIZE, &r);
158
glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_GREEN_SIZE, &g);
159
glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_BLUE_SIZE, &b);
160
glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_ALPHA_SIZE, &a);
161
bpp = (r + g + b + a) / 8;
164
/* read image from frame buffer */
165
image = (GLubyte *) malloc(TexWidth * TexHeight * bpp);
166
glPixelStorei(GL_PACK_ALIGNMENT, 1);
167
glReadPixels(0, 0, TexWidth, TexHeight,
168
ReadFormat, GL_UNSIGNED_BYTE, image);
171
glEnable(GL_TEXTURE_2D);
172
glViewport(WinWidth / 2, 0, WinWidth / 2, WinHeight);
174
t0 = glutGet(GLUT_ELAPSED_TIME) / 1000.0;
178
/* Framebuffer -> Texture */
179
DoCopyTex(doSubRect);
181
/* Main Mem -> Texture */
182
SubTex(doSubRect, image);
185
/* draw textured quad */
188
glRotatef(rot, 0, 0, 1);
189
glTranslatef(1, 0, 0);
191
glTexCoord2f(0, 0); glVertex2f(-1, -1);
192
glTexCoord2f(1, 0); glVertex2f( 1, -1);
193
glTexCoord2f(1, 1); glVertex2f( 1, 1);
194
glTexCoord2f(0, 1); glVertex2f(-1, 1);
202
t1 = glutGet(GLUT_ELAPSED_TIME) / 1000.0;
206
} while (t1 - t0 < 5.0);
208
glDisable(GL_TEXTURE_2D);
222
copyRate = iters / (t1 - t0);
223
mbRate = w * h * bpp * copyRate / (1024 * 1024);
226
printf("glCopyTexSubImage: %d x %d, %d Bpp:\n", w, h, bpp);
228
printf("glTexSubImage: %d x %d, %d Bpp:\n", w, h, bpp);
229
printf(" %d calls in %.2f = %.2f calls/sec, %.2f MB/s\n",
230
iters, t1-t0, copyRate, mbRate);
237
glClearColor(0.2, 0.2, 0.8, 0);
238
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
245
RunTest(GL_FALSE, GL_FALSE);
246
RunTest(GL_FALSE, GL_TRUE);
247
RunTest(GL_TRUE, GL_FALSE);
248
RunTest(GL_TRUE, GL_TRUE);
258
Reshape(int width, int height)
260
glViewport(0, 0, width, height);
261
glMatrixMode(GL_PROJECTION);
263
glFrustum(-1.0, 1.0, -1.0, 1.0, 5.0, 25.0);
264
glMatrixMode(GL_MODELVIEW);
266
glTranslatef(0.0, 0.0, -15.0);
271
Key(unsigned char key, int x, int y)
285
SpecialKey(int key, int x, int y)
306
/* create initial, empty teximage */
307
glBindTexture(GL_TEXTURE_2D, TexObj);
308
glTexImage2D(GL_TEXTURE_2D, 0, IntFormat, TexWidth, TexHeight, 0,
309
GL_RGBA, GL_UNSIGNED_BYTE, NULL);
310
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
311
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
312
glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
318
ParseArgs(int argc, char *argv[])
321
for (i = 1; i < argc; i++) {
322
if (strcmp(argv[i], "-nodraw") == 0)
329
main(int argc, char *argv[])
331
GLint mode = GLUT_RGB | GLUT_ALPHA | GLUT_DOUBLE | GLUT_DEPTH;
332
glutInit(&argc, argv);
334
ParseArgs(argc, argv);
336
glutInitWindowPosition(0, 0);
337
glutInitWindowSize(WinWidth, WinHeight);
338
glutInitDisplayMode(mode);
339
glutCreateWindow(argv[0]);
341
glutReshapeFunc(Reshape);
342
glutKeyboardFunc(Key);
343
glutSpecialFunc(SpecialKey);
344
glutDisplayFunc(Draw);
346
printf("GL_RENDERER: %s\n", (char *) glGetString(GL_RENDERER));
added
removed
src/tests/subtexrate.c
