mirror of
https://gitlab.freedesktop.org/mesa/mesa.git
synced 2026-05-09 02:28:10 +02:00
Add a demo illustrating various techniques for uploading dynamic (ie
streaming) texture images via PBO's. Two of these currently seem to trigger a memory leak in the i915 driver, but at least one (PBO_PINGPONG) illustrates the good speedups available with PBO's on the i915 driver, particularly zero-copy uploads.
This commit is contained in:
Keith Whitwell
parent
ec30116c9f
commit
8dab7963b7
2 changed files with 408 additions and 0 deletions
|
|
@ -47,6 +47,7 @@ PROGS = \
|
|||
renormal \
|
||||
shadowtex \
|
||||
singlebuffer \
|
||||
streaming_rect \
|
||||
spectex \
|
||||
spriteblast \
|
||||
stex3d \
|
||||
|
|
|
|||
407
progs/demos/streaming_rect.c
Normal file
407
progs/demos/streaming_rect.c
Normal file
|
|
@ -0,0 +1,407 @@
|
|||
|
||||
/*
|
||||
* GL_ARB_multitexture demo
|
||||
*
|
||||
* Command line options:
|
||||
* -info print GL implementation information
|
||||
*
|
||||
*
|
||||
* Brian Paul November 1998 This program is in the public domain.
|
||||
* Modified on 12 Feb 2002 for > 2 texture units.
|
||||
*/
|
||||
|
||||
#define GL_GLEXT_PROTOTYPES
|
||||
|
||||
#include <math.h>
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
#include <GL/glut.h>
|
||||
|
||||
#include "readtex.h"
|
||||
|
||||
enum {
|
||||
WHOLERECT,
|
||||
RENDER,
|
||||
SWAPBUF,
|
||||
|
||||
UPLOAD_CONVENTIONAL,
|
||||
UPLOAD_PBO_NAIVE,
|
||||
UPLOAD_PBO_PINGPONG,
|
||||
UPLOAD_PBO_WITH_RESET,
|
||||
UPLOAD_NOOP,
|
||||
|
||||
QUIT
|
||||
};
|
||||
|
||||
static GLint upload_style = UPLOAD_CONVENTIONAL;
|
||||
static GLboolean whole_rect = 1;
|
||||
static GLboolean do_render = 1;
|
||||
static GLboolean do_swapbuffers = 1;
|
||||
|
||||
|
||||
static GLuint col = 0x0;
|
||||
static GLfloat Xrot = 20.0, Yrot = 30.0;
|
||||
|
||||
static GLuint Width = 1024;
|
||||
static GLuint Height = 512;
|
||||
|
||||
#define NR_PBO 2
|
||||
static GLuint texObj, DrawPBO[NR_PBO];
|
||||
|
||||
|
||||
static void Idle( void )
|
||||
{
|
||||
col++;
|
||||
|
||||
glutPostRedisplay();
|
||||
}
|
||||
|
||||
static int min( int a, int b ) { return a < b ? a : b; }
|
||||
|
||||
static void DrawObject()
|
||||
{
|
||||
GLint size = Width * Height * 4;
|
||||
static char *static_image = NULL;
|
||||
static int current = 0;
|
||||
|
||||
switch (upload_style) {
|
||||
case UPLOAD_PBO_NAIVE:
|
||||
/* Continually upload from the one pbo without any attempt to
|
||||
* decouple from hardware trying to access the same data:
|
||||
*/
|
||||
glBindBufferARB(GL_PIXEL_UNPACK_BUFFER_EXT, DrawPBO[0]);
|
||||
|
||||
{
|
||||
char *image = glMapBufferARB(GL_PIXEL_UNPACK_BUFFER_EXT, GL_WRITE_ONLY_ARB);
|
||||
memset(image, col&0xff, size);
|
||||
glUnmapBufferARB(GL_PIXEL_UNPACK_BUFFER_EXT);
|
||||
}
|
||||
|
||||
glTexImage2D(GL_TEXTURE_RECTANGLE_ARB, 0, GL_RGBA, Width, Height, 0,
|
||||
GL_BGRA, GL_UNSIGNED_BYTE, NULL);
|
||||
glBindBufferARB(GL_PIXEL_UNPACK_BUFFER_EXT, 0);
|
||||
break;
|
||||
|
||||
case UPLOAD_PBO_PINGPONG:
|
||||
/* Cycle through the available upload buffers to avoid waiting
|
||||
* on buffers currently enqueued on the hardware. Avoids
|
||||
* waiting on buffer contents that may still be referenced by
|
||||
* hardware.
|
||||
*/
|
||||
current = (current + 1) % NR_PBO;
|
||||
|
||||
glBindBufferARB(GL_PIXEL_UNPACK_BUFFER_EXT, DrawPBO[current]);
|
||||
|
||||
{
|
||||
char *image = glMapBufferARB(GL_PIXEL_UNPACK_BUFFER_EXT, GL_WRITE_ONLY_ARB);
|
||||
memset(image, col&0xff, size);
|
||||
glUnmapBufferARB(GL_PIXEL_UNPACK_BUFFER_EXT);
|
||||
}
|
||||
|
||||
glTexImage2D(GL_TEXTURE_RECTANGLE_ARB, 0, GL_RGBA, Width, Height, 0,
|
||||
GL_BGRA, GL_UNSIGNED_BYTE, NULL);
|
||||
glBindBufferARB(GL_PIXEL_UNPACK_BUFFER_EXT, 0);
|
||||
break;
|
||||
|
||||
|
||||
case UPLOAD_PBO_WITH_RESET:
|
||||
/* Alternate approach, uses BufferDataARB(NULL) to explicitly
|
||||
* release the old image contents from the pbo prior to upload.
|
||||
* Similar effect to double buffering pbos as above, but a
|
||||
* little more subtle as the implications of the NULL data are
|
||||
* not entirely clear. I don't know if all drivers will take
|
||||
* full advantage of the optimization or not.
|
||||
*/
|
||||
glBindBufferARB(GL_PIXEL_UNPACK_BUFFER_EXT, DrawPBO[0]);
|
||||
|
||||
/* XXX: This is extremely important - semantically makes the buffer
|
||||
* contents undefined, but in practice means that the driver can
|
||||
* release the old copy of the texture and allocate a new one
|
||||
* without waiting for outstanding rendering to complete.
|
||||
*/
|
||||
glBufferDataARB(GL_PIXEL_UNPACK_BUFFER_EXT, size, NULL, GL_STREAM_DRAW_ARB);
|
||||
|
||||
{
|
||||
char *image = glMapBufferARB(GL_PIXEL_UNPACK_BUFFER_EXT, GL_WRITE_ONLY_ARB);
|
||||
memset(image, col&0xff, size);
|
||||
glUnmapBufferARB(GL_PIXEL_UNPACK_BUFFER_EXT);
|
||||
}
|
||||
|
||||
glTexImage2D(GL_TEXTURE_RECTANGLE_ARB, 0, GL_RGBA, Width, Height, 0,
|
||||
GL_BGRA, GL_UNSIGNED_BYTE, NULL);
|
||||
glBindBufferARB(GL_PIXEL_UNPACK_BUFFER_EXT, 0);
|
||||
break;
|
||||
|
||||
|
||||
case UPLOAD_CONVENTIONAL:
|
||||
if (static_image == NULL)
|
||||
static_image = malloc(size);
|
||||
|
||||
memset(static_image, col&0xff, size);
|
||||
|
||||
/* BGRA should be the fast path for regular uploads as well.
|
||||
*/
|
||||
glTexImage2D(GL_TEXTURE_RECTANGLE_ARB, 0, GL_RGBA, Width, Height, 0,
|
||||
GL_BGRA, GL_UNSIGNED_BYTE, static_image);
|
||||
break;
|
||||
|
||||
case UPLOAD_NOOP:
|
||||
break;
|
||||
}
|
||||
|
||||
if (do_render)
|
||||
{
|
||||
int x,y,w,h;
|
||||
|
||||
if (whole_rect) {
|
||||
x = y = 0;
|
||||
w = Width;
|
||||
h = Height;
|
||||
}
|
||||
else {
|
||||
x = y = 0;
|
||||
w = min(10, Width);
|
||||
h = min(10, Height);
|
||||
}
|
||||
|
||||
glBegin(GL_QUADS);
|
||||
|
||||
glTexCoord2f( x, y);
|
||||
glVertex2f( x, y );
|
||||
|
||||
glTexCoord2f( x, y + h);
|
||||
glVertex2f( x, y + h);
|
||||
|
||||
glTexCoord2f( x + w, y + h);
|
||||
glVertex2f( x + w, y + h );
|
||||
|
||||
glTexCoord2f( x + w, y);
|
||||
glVertex2f( x + w, y );
|
||||
|
||||
glEnd();
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
|
||||
static void Display( void )
|
||||
{
|
||||
static GLint T0 = 0;
|
||||
static GLint Frames = 0;
|
||||
GLint t;
|
||||
|
||||
glClear( GL_COLOR_BUFFER_BIT );
|
||||
|
||||
glPushMatrix();
|
||||
DrawObject();
|
||||
glPopMatrix();
|
||||
|
||||
if (do_swapbuffers)
|
||||
glutSwapBuffers();
|
||||
else
|
||||
glFlush();
|
||||
|
||||
Frames++;
|
||||
|
||||
t = glutGet(GLUT_ELAPSED_TIME);
|
||||
if (t - T0 >= 1000) {
|
||||
GLfloat seconds = (t - T0) / 1000.0;
|
||||
|
||||
GLfloat fps = Frames / seconds;
|
||||
printf("%d frames in %6.3f seconds = %6.3f FPS\n", Frames, seconds, fps);
|
||||
|
||||
T0 = t;
|
||||
Frames = 0;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static void Reshape( int width, int height )
|
||||
{
|
||||
glViewport( 0, 0, width, height );
|
||||
glMatrixMode( GL_PROJECTION );
|
||||
glLoadIdentity();
|
||||
/* glFrustum( -1.0, 1.0, -1.0, 1.0, 10.0, 100.0 ); */
|
||||
gluOrtho2D( 0, width, height, 0 );
|
||||
glMatrixMode( GL_MODELVIEW );
|
||||
glLoadIdentity();
|
||||
/* glTranslatef(0.375, 0.375, 0); */
|
||||
}
|
||||
|
||||
|
||||
static void ModeMenu(int entry)
|
||||
{
|
||||
switch (entry) {
|
||||
case WHOLERECT:
|
||||
whole_rect = !whole_rect;
|
||||
break;
|
||||
case RENDER:
|
||||
do_render = !do_render;
|
||||
break;
|
||||
case SWAPBUF:
|
||||
do_swapbuffers = !do_swapbuffers;
|
||||
break;
|
||||
|
||||
case UPLOAD_CONVENTIONAL:
|
||||
case UPLOAD_PBO_NAIVE:
|
||||
case UPLOAD_PBO_PINGPONG:
|
||||
case UPLOAD_PBO_WITH_RESET:
|
||||
case UPLOAD_NOOP:
|
||||
upload_style = entry;
|
||||
break;
|
||||
|
||||
case QUIT:
|
||||
exit(0);
|
||||
break;
|
||||
}
|
||||
|
||||
glutPostRedisplay();
|
||||
}
|
||||
|
||||
|
||||
static void Key( unsigned char key, int x, int y )
|
||||
{
|
||||
(void) x;
|
||||
(void) y;
|
||||
switch (key) {
|
||||
case 27:
|
||||
exit(0);
|
||||
break;
|
||||
}
|
||||
glutPostRedisplay();
|
||||
}
|
||||
|
||||
|
||||
static void SpecialKey( int key, int x, int y )
|
||||
{
|
||||
float step = 3.0;
|
||||
(void) x;
|
||||
(void) y;
|
||||
|
||||
switch (key) {
|
||||
case GLUT_KEY_UP:
|
||||
Xrot += step;
|
||||
break;
|
||||
case GLUT_KEY_DOWN:
|
||||
Xrot -= step;
|
||||
break;
|
||||
case GLUT_KEY_LEFT:
|
||||
Yrot += step;
|
||||
break;
|
||||
case GLUT_KEY_RIGHT:
|
||||
Yrot -= step;
|
||||
break;
|
||||
}
|
||||
glutPostRedisplay();
|
||||
}
|
||||
|
||||
|
||||
static void Init( int argc, char *argv[] )
|
||||
{
|
||||
const char *exten = (const char *) glGetString(GL_EXTENSIONS);
|
||||
GLint size;
|
||||
|
||||
|
||||
if (!strstr(exten, "GL_ARB_multitexture")) {
|
||||
printf("Sorry, GL_ARB_multitexture not supported by this renderer.\n");
|
||||
exit(1);
|
||||
}
|
||||
|
||||
glGetIntegerv(GL_MAX_TEXTURE_SIZE, &size);
|
||||
printf("%d x %d max texture size\n", size, size);
|
||||
|
||||
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
|
||||
|
||||
/* allocate two texture objects */
|
||||
glGenTextures(1, &texObj);
|
||||
|
||||
/* setup the texture objects */
|
||||
glActiveTextureARB(GL_TEXTURE0_ARB);
|
||||
glBindTexture(GL_TEXTURE_RECTANGLE_ARB, texObj);
|
||||
|
||||
glTexParameteri(GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
|
||||
glTexParameteri(GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
|
||||
|
||||
glGenBuffersARB(NR_PBO, DrawPBO);
|
||||
|
||||
{
|
||||
int i;
|
||||
for (i = 0; i < NR_PBO; i++) {
|
||||
glBindBufferARB(GL_PIXEL_UNPACK_BUFFER_EXT, DrawPBO[i]);
|
||||
glBufferDataARB(GL_PIXEL_UNPACK_BUFFER_EXT, Width * Height * 4, NULL, GL_STREAM_DRAW_ARB);
|
||||
}
|
||||
glBindBufferARB(GL_PIXEL_UNPACK_BUFFER_EXT, 0);
|
||||
}
|
||||
|
||||
glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
|
||||
|
||||
glEnable(GL_TEXTURE_RECTANGLE_ARB);
|
||||
|
||||
glShadeModel(GL_SMOOTH);
|
||||
glClearColor(0.3, 0.3, 0.4, 1.0);
|
||||
|
||||
if (argc > 1 && strcmp(argv[1], "-info")==0) {
|
||||
printf("GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER));
|
||||
printf("GL_VERSION = %s\n", (char *) glGetString(GL_VERSION));
|
||||
printf("GL_VENDOR = %s\n", (char *) glGetString(GL_VENDOR));
|
||||
printf("GL_EXTENSIONS = %s\n", (char *) glGetString(GL_EXTENSIONS));
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
int main( int argc, char *argv[] )
|
||||
{
|
||||
GLint i;
|
||||
|
||||
glutInit( &argc, argv );
|
||||
|
||||
for (i = 1; i < argc; i++) {
|
||||
if (strcmp(argv[i], "-w") == 0) {
|
||||
Width = atoi(argv[i+1]);
|
||||
if (Width <= 0) {
|
||||
printf("Error, bad width\n");
|
||||
exit(1);
|
||||
}
|
||||
i++;
|
||||
}
|
||||
else if (strcmp(argv[i], "-h") == 0) {
|
||||
Height = atoi(argv[i+1]);
|
||||
if (Height <= 0) {
|
||||
printf("Error, bad height\n");
|
||||
exit(1);
|
||||
}
|
||||
i++;
|
||||
}
|
||||
}
|
||||
|
||||
glutInitWindowSize( Width, Height );
|
||||
glutInitWindowPosition( 0, 0 );
|
||||
glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE );
|
||||
glutCreateWindow(argv[0] );
|
||||
|
||||
Init( argc, argv );
|
||||
|
||||
glutReshapeFunc( Reshape );
|
||||
glutKeyboardFunc( Key );
|
||||
glutSpecialFunc( SpecialKey );
|
||||
glutDisplayFunc( Display );
|
||||
glutIdleFunc( Idle );
|
||||
|
||||
glutCreateMenu(ModeMenu);
|
||||
glutAddMenuEntry("Wholerect", WHOLERECT);
|
||||
glutAddMenuEntry("Render", RENDER);
|
||||
glutAddMenuEntry("Swapbuf", SWAPBUF);
|
||||
|
||||
glutAddMenuEntry("Upload style CONVENTIONAL", UPLOAD_CONVENTIONAL);
|
||||
glutAddMenuEntry("Upload style PBO_NAIVE", UPLOAD_PBO_NAIVE);
|
||||
glutAddMenuEntry("Upload style PBO_PINGPONG", UPLOAD_PBO_PINGPONG);
|
||||
glutAddMenuEntry("Upload style PBO_WITH_RESET", UPLOAD_PBO_WITH_RESET);
|
||||
glutAddMenuEntry("Upload style NOOP", UPLOAD_NOOP);
|
||||
|
||||
glutAddMenuEntry("Quit", QUIT);
|
||||
glutAttachMenu(GLUT_RIGHT_BUTTON);
|
||||
|
||||
glutMainLoop();
|
||||
return 0;
|
||||
}
|
||||
Loading…
Add table
Reference in a new issue