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Implement mathematically correct scalar blitters

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This commit is contained in:
Isaac Aronson
2023-09-12 22:28:08 -05:00
committed by Sam Lantinga
parent f0238ef615
commit f5ee88c2cf
4 changed files with 46 additions and 134 deletions
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25
test/testautomation_blit.c
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@@ -98,8 +98,7 @@ Uint32 hashSurfacePixels(SDL_Surface * surface) {
int blit_testExampleApplicationRender(void *arg) {
const int width = 32;
const int height = 32;
const unsigned long scalar_hash = 0xf47a3f55;
const unsigned long x86_simd_hash = 0xe345d7a7;
const unsigned long correct_hash = 0xe345d7a7;
SDL_Surface* dest_surface = SDL_CreateSurface(width, height, SDL_PIXELFORMAT_ARGB8888);
SDL_Surface* rainbow_background = SDLTest_ImageBlendingBackground();
SDL_Surface* gearbrain_sprite = SDLTest_ImageBlendingSprite();
@@ -109,9 +108,8 @@ int blit_testExampleApplicationRender(void *arg) {
SDL_BlitSurface(gearbrain_sprite, NULL, dest_surface, NULL);
// Check result
const unsigned long hash = hashSurfacePixels(dest_surface);
SDLTest_AssertCheck(hash == scalar_hash || hash == x86_simd_hash,
"Should render identically, expected 0x%lx (scalar) or 0x%lx (x86_simd), got 0x%lx",
scalar_hash, x86_simd_hash, hash);
SDLTest_AssertCheck(hash == correct_hash,
"Should render identically, expected hash 0x%lx, got 0x%lx", correct_hash, hash);
// Clean up
SDL_DestroySurface(rainbow_background);
SDL_DestroySurface(gearbrain_sprite);
@@ -126,8 +124,7 @@ int blit_testExampleApplicationRender(void *arg) {
int blit_testRandomToRandomSVGA(void *arg) {
const int width = 800;
const int height = 600;
const unsigned long scalar_hash = 0x1f56efad;
const unsigned long x86_simd_hash = 0x42140c5f;
const unsigned long correct_hash = 0x42140c5f;
// Allocate random buffers
Uint32 *dest_pixels = getNextRandomBuffer(width, height);
Uint32 *src_pixels = getNextRandomBuffer(width, height);
@@ -138,9 +135,8 @@ int blit_testRandomToRandomSVGA(void *arg) {
SDL_BlitSurface(src_surface, NULL, dest_surface, NULL);
// Check result
const unsigned long hash = hashSurfacePixels(dest_surface);
SDLTest_AssertCheck(hash == scalar_hash || hash == x86_simd_hash,
"Should render identically, expected 0x%lx (scalar) or 0x%lx (x86_simd), got 0x%lx",
scalar_hash, x86_simd_hash, hash);
SDLTest_AssertCheck(hash == correct_hash,
"Should render identically, expected hash 0x%lx, got 0x%lx", correct_hash, hash);
// Clean up
SDL_DestroySurface(dest_surface);
SDL_DestroySurface(src_surface);
@@ -157,8 +153,7 @@ int blit_testRandomToRandomSVGAMultipleIterations(void *arg) {
const int width = 800;
const int height = 600;
int i;
const unsigned long x86_simd_hash = 0x2626be78;
const unsigned long scalar_hash = 0xfb2a8ee8;
const unsigned long correct_hash = 0x5d26be78;
// Create blank source surface
SDL_Surface* dest_surface = SDL_CreateSurface(width, height, SDL_PIXELFORMAT_ABGR8888);
@@ -180,11 +175,9 @@ int blit_testRandomToRandomSVGAMultipleIterations(void *arg) {
// Check result
const unsigned long hash = hashSurfacePixels(dest_surface);
// Clean up
SDL_SaveBMP(dest_surface, "250k_scalar.bmp");
SDL_DestroySurface(dest_surface);
SDLTest_AssertCheck(hash == scalar_hash || hash == x86_simd_hash,
"Should render identically, expected 0x%lx (scalar) or 0x%lx (x86_simd), got 0x%lx",
scalar_hash, x86_simd_hash, hash);
SDLTest_AssertCheck(hash == correct_hash,
"Should render identically, expected hash 0x%lx, got 0x%lx", correct_hash, hash);
return TEST_COMPLETED;
}