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/*
* Copyright (C) 2009 VMware, Inc. All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* VMWARE BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
/**
* Measure glTexSubImage2D rate
*
* Brian Paul
* 16 Sep 2009
*/
#include "glmain.h"
#include "common.h"
int WinWidth = 100, WinHeight = 100;
static GLuint VBO;
static GLuint TexObj = 0;
static GLubyte *TexImage = NULL;
static GLsizei TexSize;
static GLenum TexSrcFormat, TexSrcType;
static const GLboolean DrawPoint = GL_TRUE;
static const GLboolean TexSubImage4 = GL_TRUE;
struct vertex
{
GLfloat x, y, s, t;
};
static const struct vertex vertices[1] = {
{ 0.0, 0.0, 0.5, 0.5 },
};
#if 0
#define VOFFSET(F) ((void *) offsetof(struct vertex, F))
#else
#define VOFFSET(F) ((void *) &((struct vertex *)NULL)->F)
#endif
/** Called from test harness/main */
void
PerfInit(void)
{
/* setup VBO w/ vertex data */
glGenBuffersARB(1, &VBO);
glBindBufferARB(GL_ARRAY_BUFFER_ARB, VBO);
glBufferDataARB(GL_ARRAY_BUFFER_ARB,
sizeof(vertices), vertices, GL_STATIC_DRAW_ARB);
glVertexPointer(2, GL_FLOAT, sizeof(struct vertex), VOFFSET(x));
glTexCoordPointer(2, GL_FLOAT, sizeof(struct vertex), VOFFSET(s));
glEnableClientState(GL_VERTEX_ARRAY);
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
/* texture */
glGenTextures(1, &TexObj);
glBindTexture(GL_TEXTURE_2D, TexObj);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glEnable(GL_TEXTURE_2D);
}
static void
UploadTexImage2D(unsigned count)
{
unsigned i;
for (i = 0; i < count; i++) {
/* XXX is this equivalent to a glTexSubImage call since we're
* always specifying the same image size? That case isn't optimized
* in Mesa but may be optimized in other drivers. Note sure how
* much difference that might make.
*/
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA,
TexSize, TexSize, 0,
TexSrcFormat, TexSrcType, TexImage);
if (DrawPoint)
glDrawArrays(GL_POINTS, 0, 1);
}
glFinish();
}
static void
UploadTexSubImage2D(unsigned count)
{
unsigned i;
for (i = 0; i < count; i++) {
if (TexSubImage4) {
GLsizei halfSize = (TexSize == 1) ? 1 : TexSize / 2;
GLsizei halfPos = TexSize - halfSize;
/* do glTexSubImage2D in four pieces */
/* lower-left */
glPixelStorei(GL_UNPACK_ROW_LENGTH, TexSize);
glTexSubImage2D(GL_TEXTURE_2D, 0,
0, 0, halfSize, halfSize,
TexSrcFormat, TexSrcType, TexImage);
/* lower-right */
glPixelStorei(GL_UNPACK_SKIP_PIXELS, halfPos);
glTexSubImage2D(GL_TEXTURE_2D, 0,
halfPos, 0, halfSize, halfSize,
TexSrcFormat, TexSrcType, TexImage);
/* upper-left */
glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0);
glPixelStorei(GL_UNPACK_SKIP_ROWS, halfPos);
glTexSubImage2D(GL_TEXTURE_2D, 0,
0, halfPos, halfSize, halfSize,
TexSrcFormat, TexSrcType, TexImage);
/* upper-right */
glPixelStorei(GL_UNPACK_SKIP_PIXELS, halfPos);
glPixelStorei(GL_UNPACK_SKIP_ROWS, halfPos);
glTexSubImage2D(GL_TEXTURE_2D, 0,
halfPos, halfPos, halfSize, halfSize,
TexSrcFormat, TexSrcType, TexImage);
/* reset the unpacking state */
glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0);
glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0);
glPixelStorei(GL_UNPACK_SKIP_ROWS, 0);
}
else {
/* replace whole texture image at once */
glTexSubImage2D(GL_TEXTURE_2D, 0,
0, 0, TexSize, TexSize,
TexSrcFormat, TexSrcType, TexImage);
}
if (DrawPoint)
glDrawArrays(GL_POINTS, 0, 1);
}
glFinish();
}
/* XXX any other formats to measure? */
static const struct {
GLenum format, type;
const char *name;
} SrcFormats[] = {
{ GL_RGBA, GL_UNSIGNED_BYTE, "GL_RGBA/GLubyte" },
{ GL_BGRA, GL_UNSIGNED_BYTE, "GL_BGRA/GLubyte" },
{ 0, 0, NULL }
};
/** Called from test harness/main */
void
PerfDraw(void)
{
GLint maxSize;
double rate;
GLint fmt, subImage;
glGetIntegerv(GL_MAX_TEXTURE_SIZE, &maxSize);
/* loop over source data formats */
for (fmt = 0; SrcFormats[fmt].format; fmt++) {
TexSrcFormat = SrcFormats[fmt].format;
TexSrcType = SrcFormats[fmt].type;
/* loop over glTexImage, glTexSubImage */
for (subImage = 0; subImage < 2; subImage++) {
/* loop over texture sizes */
for (TexSize = 16; TexSize <= maxSize; TexSize *= 2) {
GLint bytesPerImage;
double mbPerSec;
bytesPerImage = TexSize * TexSize * 4;
TexImage = malloc(bytesPerImage);
if (subImage) {
/* create initial, empty texture */
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA,
TexSize, TexSize, 0,
TexSrcFormat, TexSrcType, NULL);
rate = PerfMeasureRate(UploadTexSubImage2D);
}
else {
rate = PerfMeasureRate(UploadTexImage2D);
}
mbPerSec = rate * bytesPerImage / (1024.0 * 1024.0);
perf_printf(" glTex%sImage2D(%s %d x %d): "
"%.1f images/sec, %.1f MB/sec\n",
(subImage ? "Sub" : ""),
SrcFormats[fmt].name, TexSize, TexSize, rate, mbPerSec);
free(TexImage);
}
}
}
exit(0);
}
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