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PS1: Save a few cycles in T&L loop

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UnknownShadow200 2025-01-20 21:30:20 +11:00
parent c580186841
commit 27feb27c39
1 changed files with 7 additions and 8 deletions
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13
src/Graphics_PS1.c
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@ -264,7 +264,7 @@ static int VRAM_CalcPage(int line) {
#define TEXTURES_MAX_COUNT 64
typedef struct GPUTexture {
cc_uint16 width, height;
cc_uint8 width_shift, height_shift;
cc_uint8 u_shift, v_shift;
cc_uint16 line, tpage;
cc_uint8 xOffset, yOffset;
} GPUTexture;
@ -290,8 +290,8 @@ static void* AllocTextureAt(int i, struct Bitmap* bmp, int rowWidth) {
int line = VRAM_FindFreeBlock(bmp->width, bmp->height);
if (line == -1) { Mem_Free(tmp); return NULL; }
tex->width = bmp->width; tex->width_shift = Math_ilog2(bmp->width);
tex->height = bmp->height; tex->height_shift = Math_ilog2(bmp->height);
tex->width = bmp->width; tex->u_shift = 10 - Math_ilog2(bmp->width);
tex->height = bmp->height; tex->v_shift = 10 - Math_ilog2(bmp->height);
tex->line = line;
int page = VRAM_CalcPage(line);
@ -750,8 +750,7 @@ static void DrawColouredQuads2D(int verticesCount, int startVertex) {
static void DrawTexturedQuads2D(int verticesCount, int startVertex) {
int uOffset = curTex->xOffset, vOffset = curTex->yOffset;
int uShift = 10 - curTex->width_shift;
int vShift = 10 - curTex->height_shift;
int uShift = curTex->u_shift, vShift = curTex->v_shift;
for (int i = 0; i < verticesCount; i += 4)
{
@ -884,8 +883,8 @@ static CC_INLINE void DrawTexturedQuad(struct PS1VertexTextured* v0, struct PS1V
int uOffset = curTex->xOffset;
int vOffset = curTex->yOffset;
int uShift = 10 - curTex->width_shift;
int vShift = 10 - curTex->height_shift;
int uShift = curTex->u_shift;
int vShift = curTex->v_shift;
poly->u0 = (v1->u >> uShift) + uOffset;
poly->v0 = (v1->v >> vShift) + vOffset;