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SoftGPU: Skip full texturing calculations for 1x1 bitmaps

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UnknownShadow200 2025-01-01 11:22:01 +11:00
parent e86caaa4e1
commit a46626cf78
2 changed files with 58 additions and 33 deletions
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2
src/Graphics.h
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@ -88,7 +88,7 @@ CC_VAR extern struct _GfxData {
/* Whether the graphics backend supports U/V that don't occupy whole texture */
/* e.g. Saturn, 3D0 systems don't support it */
#define GFX_LIMIT_NO_UV_SUPPORT 0x01
/* Whether the graphics backend requires very large quads to be broken
/* Whether the graphics backend requires very large quads to be broken */
/* up into smaller quads, to reduce fog interpolation artifacts */
#define GFX_LIMIT_VERTEX_ONLY_FOG 0x02

77
src/Graphics_SoftGPU.c
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@ -74,6 +74,7 @@ static CCTexture* curTexture;
static BitmapCol* curTexPixels;
static int curTexWidth, curTexHeight;
static int texWidthMask, texHeightMask;
static int texSinglePixel;
void Gfx_BindTexture(GfxResourceID texId) {
if (!texId) texId = white_square;
@ -86,6 +87,7 @@ void Gfx_BindTexture(GfxResourceID texId) {
texWidthMask = (1 << Math_ilog2(tex->width)) - 1;
texHeightMask = (1 << Math_ilog2(tex->height)) - 1;
texSinglePixel = curTexWidth == 1 && curTexHeight == 1;
}
void Gfx_DeleteTexture(GfxResourceID* texId) {
@ -475,6 +477,23 @@ static void DrawTriangle2D(Vertex* V0, Vertex* V1, Vertex* V2) {
}
}
#define MultiplyColors(vColor, tColor) \
a1 = PackedCol_A(vColor); \
a2 = BitmapCol_A(tColor); \
A = ( a1 * a2 ) >> 8; \
\
r1 = PackedCol_R(vColor); \
r2 = BitmapCol_R(tColor); \
R = ( r1 * r2 ) >> 8; \
\
g1 = PackedCol_G(vColor); \
g2 = BitmapCol_G(tColor); \
G = ( g1 * g2 ) >> 8; \
\
b1 = PackedCol_B(vColor); \
b2 = BitmapCol_B(tColor); \
B = ( b1 * b2 ) >> 8; \
static void DrawTriangle3D(Vertex* V0, Vertex* V1, Vertex* V2) {
int x0 = (int)V0->x, y0 = (int)V0->y;
int x1 = (int)V1->x, y1 = (int)V1->y;
@ -522,6 +541,22 @@ static void DrawTriangle3D(Vertex* V0, Vertex* V1, Vertex* V2) {
float bc1_start = edgeFunction(x2,y2, x0,y0, minX+0.5f,minY+0.5f);
float bc2_start = edgeFunction(x0,y0, x1,y1, minX+0.5f,minY+0.5f);
int R, G, B, A;
int a1, r1, g1, b1;
int a2, r2, g2, b2;
cc_bool texturing = gfx_format == VERTEX_FORMAT_TEXTURED;
if (!texturing) {
R = PackedCol_R(color);
G = PackedCol_G(color);
B = PackedCol_B(color);
A = PackedCol_A(color);
} else if (texSinglePixel) {
/* Don't need to calculate complicated texturing in this case */
MultiplyColors(color, curTexPixels[0]);
texturing = false;
}
for (int y = minY; y <= maxY; y++, bc0_start += dy12, bc1_start += dy20, bc2_start += dy01)
{
float bc0 = bc0_start;
@ -549,48 +584,38 @@ static void DrawTriangle3D(Vertex* V0, Vertex* V1, Vertex* V2) {
if (!colWrite) continue;
#endif
int R, G, B, A;
if (gfx_format == VERTEX_FORMAT_TEXTURED) {
if (texturing) {
float u = (ic0 * u0 + ic1 * u1 + ic2 * u2) * w;
float v = (ic0 * v0 + ic1 * v1 + ic2 * v2) * w;
int texX = ((int)(Math_AbsF(u - FastFloor(u)) * curTexWidth )) & texWidthMask;
int texY = ((int)(Math_AbsF(v - FastFloor(v)) * curTexHeight)) & texHeightMask;
int texIndex = texY * curTexWidth + texX;
int texIndex = texY * curTexWidth + texX;
BitmapCol tColor = curTexPixels[texIndex];
int a1 = PackedCol_A(color), a2 = BitmapCol_A(tColor);
A = ( a1 * a2 ) >> 8;
int r1 = PackedCol_R(color), r2 = BitmapCol_R(tColor);
R = ( r1 * r2 ) >> 8;
int g1 = PackedCol_G(color), g2 = BitmapCol_G(tColor);
G = ( g1 * g2 ) >> 8;
int b1 = PackedCol_B(color), b2 = BitmapCol_B(tColor);
B = ( b1 * b2 ) >> 8;
} else {
R = PackedCol_R(color);
G = PackedCol_G(color);
B = PackedCol_B(color);
A = PackedCol_A(color);
MultiplyColors(color, tColor);
}
if (gfx_alphaTest && A < 0x80) continue;
#ifndef SOFTGPU_DISABLE_ZBUFFER
if (depthWrite) depthBuffer[db_index] = z;
#endif
int cb_index = y * cb_stride + x;
if (gfx_alphaBlend) {
if (!gfx_alphaBlend) {
colorBuffer[cb_index] = BitmapCol_Make(R, G, B, 0xFF);
continue;
}
BitmapCol dst = colorBuffer[cb_index];
int dstR = BitmapCol_R(dst);
int dstG = BitmapCol_G(dst);
int dstB = BitmapCol_B(dst);
R = (R * A + dstR * (255 - A)) >> 8;
G = (G * A + dstG * (255 - A)) >> 8;
B = (B * A + dstB * (255 - A)) >> 8;
}
#ifndef SOFTGPU_DISABLE_ZBUFFER
if (depthWrite) depthBuffer[db_index] = z;
#endif
colorBuffer[cb_index] = BitmapCol_Make(R, G, B, 0xFF);
int finR = (R * A + dstR * (255 - A)) >> 8;
int finG = (G * A + dstG * (255 - A)) >> 8;
int finB = (B * A + dstB * (255 - A)) >> 8;
colorBuffer[cb_index] = BitmapCol_Make(finR, finG, finB, 0xFF);
}
}
}