mirrors
/
SDL
mirror of https://github.com/libsdl-org/SDL
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

blit_testRandomToRandomSVGAMultipleIterations: avoid 250000 allocations

This commit is contained in:
Anonymous Maarten 2024-08-30 22:22:49 +02:00 committed by Anonymous Maarten
parent f5f10a8cd1
commit 36b84e7e00
1 changed files with 18 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

29
test/testautomation_blit.c
View File

@ -45,10 +45,9 @@ void blitSetUp(void *arg) {
rngState[1] = 2;
}
/*
* Generates a stream of PRNG pixel data given length
* Fill buffer with stream of PRNG pixel data given size
*/
Uint32 *getNextRandomBuffer(const int width, const int height) {
Uint32* buf = SDL_malloc(sizeof(Uint32) * width * height);
static Uint32 *fillNextRandomBuffer(Uint32 *buf, const int width, const int height) {
int i;
for (i = 0; i < width * height; i++) {
buf[i] = getRandomUint32();
@ -56,10 +55,12 @@ Uint32 *getNextRandomBuffer(const int width, const int height) {
return buf;
}
/*
* Generates a small 15 x 15px surface of PRNG pixel data
* Generates a stream of PRNG pixel data given length
*/
SDL_Surface* getRandomBlitChunk(Uint32 *pixels, SDL_PixelFormat format) {
return SDL_CreateSurfaceFrom(15, 15, format, pixels, 15 * 4);
static Uint32 *getNextRandomBuffer(const int width, const int height) {
Uint32* buf = SDL_malloc(sizeof(Uint32) * width * height);
fillNextRandomBuffer(buf, width, height);
return buf;
}
/*
* Generates a 800 x 600 surface of PRNG pixel data
@ -154,15 +155,22 @@ int blit_testRandomToRandomSVGA(void *arg) {
int blit_testRandomToRandomSVGAMultipleIterations(void *arg) {
const int width = 800;
const int height = 600;
const int blit_width = 15;
const int blit_height = 15;
int i;
const Uint32 correct_hash = 0x5d26be78;
Uint32 *buf = SDL_malloc(blit_width * blit_height * sizeof(Uint32));
// Create blank source surface
SDL_Surface *sourceSurface = SDL_CreateSurface(blit_width, blit_height, SDL_PIXELFORMAT_RGBA8888);
// Create blank destination surface
SDL_Surface* dest_surface = SDL_CreateSurface(width, height, SDL_PIXELFORMAT_ABGR8888);
// Perform 250k random blits into random areas of the blank surface
for (i = 0; i < 250000; i++) {
Uint32 *buf = getNextRandomBuffer(15, 15);
SDL_Surface *sourceSurface = getRandomBlitChunk(buf, SDL_PIXELFORMAT_RGBA8888);
fillNextRandomBuffer(buf, blit_width, blit_height);
SDL_LockSurface(sourceSurface);
SDL_memcpy(sourceSurface->pixels, buf, blit_width * blit_height * sizeof(Uint32));
SDL_UnlockSurface(sourceSurface);
SDL_Rect dest_rect;
int location = (int)getRandomUint32();
@ -170,9 +178,6 @@ int blit_testRandomToRandomSVGAMultipleIterations(void *arg) {
dest_rect.y = location % (height - 15 - 1);
SDL_BlitSurface(sourceSurface, NULL, dest_surface, &dest_rect);
SDL_DestroySurface(sourceSurface);
SDL_free(buf);
}
// Check result
const Uint32 hash = hashSurfacePixels(dest_surface);
@ -181,6 +186,8 @@ int blit_testRandomToRandomSVGAMultipleIterations(void *arg) {
SDLTest_AssertCheck(hash == correct_hash,
"Should render identically, expected hash 0x%" SDL_PRIx32 ", got 0x%" SDL_PRIx32,
correct_hash, hash);
SDL_DestroySurface(sourceSurface);
SDL_free(buf);
return TEST_COMPLETED;
}