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Boost SoftGPU backend performance a little bit more

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On test flat world, FPS went from 45 to 47
This commit is contained in:
UnknownShadow200 2024-06-05 07:49:20 +10:00
parent 5b20773092
commit 6be13e0951
1 changed files with 22 additions and 19 deletions
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41
src/Graphics_SoftGPU.c
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@ -314,17 +314,11 @@ static void TransformVertex(int index, Vertex* vertex) {
vertex->c = v->Col; vertex->c = v->Col;
} }
} }
static int MultiplyColours(PackedCol vColor, BitmapCol tColor) { // Ensure it's inlined, whereas Math_FloorF might not be
int a1 = PackedCol_A(vColor), a2 = BitmapCol_A(tColor); static CC_INLINE int FastFloor(float value) {
int a = ( a1 * a2 ) / 255; int valueI = (int)value;
int r1 = PackedCol_R(vColor), r2 = BitmapCol_R(tColor); return valueI > value ? valueI - 1 : valueI;
int r = ( r1 * r2 ) / 255;
int g1 = PackedCol_G(vColor), g2 = BitmapCol_G(tColor);
int g = ( g1 * g2 ) / 255;
int b1 = PackedCol_B(vColor), b2 = BitmapCol_B(tColor);
int b = ( b1 * b2 ) / 255;
return PackedCol_Make(r, g, b, a);
} }
static void DrawTriangle(Vertex* frag1, Vertex* frag2, Vertex* frag3) { static void DrawTriangle(Vertex* frag1, Vertex* frag2, Vertex* frag3) {
@ -385,21 +379,30 @@ static void DrawTriangle(Vertex* frag1, Vertex* frag2, Vertex* frag3) {
continue; continue;
} }
PackedCol fragColor = color; int R, G, B, A;
if (gfx_format == VERTEX_FORMAT_TEXTURED) { if (gfx_format == VERTEX_FORMAT_TEXTURED) {
float u = (ic0 * u1 + ic1 * u2 + ic2 * u3) * w; float u = (ic0 * u1 + ic1 * u2 + ic2 * u3) * w;
float v = (ic0 * v1 + ic1 * v2 + ic2 * v3) * w; float v = (ic0 * v1 + ic1 * v2 + ic2 * v3) * w;
int texX = ((int)(Math_AbsF(u - Math_Floor(u)) * curTexWidth )) & texWidthMask; int texX = ((int)(Math_AbsF(u - FastFloor(u)) * curTexWidth )) & texWidthMask;
int texY = ((int)(Math_AbsF(v - Math_Floor(v)) * curTexHeight)) & texHeightMask; int texY = ((int)(Math_AbsF(v - FastFloor(v)) * curTexHeight)) & texHeightMask;
int texIndex = texY * curTexWidth + texX; int texIndex = texY * curTexWidth + texX;
fragColor = MultiplyColours(fragColor, curTexPixels[texIndex]); BitmapCol tColor = curTexPixels[texIndex];
int a1 = PackedCol_A(color), a2 = BitmapCol_A(tColor);
A = ( a1 * a2 ) / 255;
int r1 = PackedCol_R(color), r2 = BitmapCol_R(tColor);
R = ( r1 * r2 ) / 255;
int g1 = PackedCol_G(color), g2 = BitmapCol_G(tColor);
G = ( g1 * g2 ) / 255;
int b1 = PackedCol_B(color), b2 = BitmapCol_B(tColor);
B = ( b1 * b2 ) / 255;
} else {
R = PackedCol_R(color);
G = PackedCol_G(color);
B = PackedCol_B(color);
A = PackedCol_A(color);
} }
int R = PackedCol_R(fragColor);
int G = PackedCol_G(fragColor);
int B = PackedCol_B(fragColor);
int A = PackedCol_A(fragColor);
if (gfx_alphaBlend) { if (gfx_alphaBlend) {
BitmapCol dst = colorBuffer[index]; BitmapCol dst = colorBuffer[index];