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#if SPECIAL
#include "main.h"
#endif
static void
Effect_Software_DrawColor(int Width, int Height, int BytesPerPixel, void *EffectBitmapAddress, v4 Color, blend_mode BlendMode)
{
render_byte_info Bits = Bitmap_ByteInfo(BytesPerPixel);
rectangle RenderRegion = {0, 0, Width, Height};
transform_info T;
T.BlendMode = BlendMode;
for (int32 Y = RenderRegion.Min.y; Y < RenderRegion.Max.y; Y++) {
for (int32 X = RenderRegion.Min.x; X < RenderRegion.Max.x; X++) {
uint32 Offset = Y*Width*BytesPerPixel + X*BytesPerPixel;
uint8 *LayerPixel = (uint8 *)EffectBitmapAddress + Offset;
uint32 *R_DestAddress = (uint32 *)(LayerPixel + Bits.ByteOffset * 0);
uint32 *G_DestAddress = (uint32 *)(LayerPixel + Bits.ByteOffset * 1);
uint32 *B_DestAddress = (uint32 *)(LayerPixel + Bits.ByteOffset * 2);
uint32 *A_DestAddress = (uint32 *)(LayerPixel + Bits.ByteOffset * 3);
real32 R_Dest = (real32)(*R_DestAddress & Bits.MaskPixel) * Bits.Normalized;
real32 G_Dest = (real32)(*G_DestAddress & Bits.MaskPixel) * Bits.Normalized;
real32 B_Dest = (real32)(*B_DestAddress & Bits.MaskPixel) * Bits.Normalized;
real32 A_Dest = (real32)(*A_DestAddress & Bits.MaskPixel) * Bits.Normalized;
real32 R_Col = Color.r;
real32 G_Col = Color.g;
real32 B_Col = Color.b;
real32 A_Col = Color.a;
real32 LayerAlpha = A_Col * 1;
real32 R_Blend = R_Col;
real32 G_Blend = G_Col;
real32 B_Blend = B_Col;
real32 A_Blend = A_Col;
Fallback_Blend();
uint32 R_Out = (uint32)(Normalize(R_Blend) * Bits.Bits);
uint32 G_Out = (uint32)(Normalize(G_Blend) * Bits.Bits);
uint32 B_Out = (uint32)(Normalize(B_Blend) * Bits.Bits);
uint32 A_Out = (uint32)(Normalize(A_Blend) * Bits.Bits);
*R_DestAddress = (*R_DestAddress & ~Bits.MaskPixel) | R_Out;
*G_DestAddress = (*G_DestAddress & ~Bits.MaskPixel) | G_Out;
*B_DestAddress = (*B_DestAddress & ~Bits.MaskPixel) | B_Out;
*A_DestAddress = (*A_DestAddress & ~Bits.MaskPixel) | A_Out;
}
}
}
static void
CurvesSolver(real32 *LUT, v2 Point_P1, v2 Point_P2, v2 m1, v2 m2, int i)
{
real32 Precision = ((real32)1 / 256) * 0.1;
real32 Point_Span = Point_P2.x - Point_P1.x;
v2 Cache[256];
if (i == 0) {
// Don't know how to fix this, so I'm just gonna linear interpolate
// until I try quadratic solving.
real32 Count_Start = (Point_P1.x * 256);
real32 Count_End = (Point_P2.x * 256);
real32 Count_Total = Count_End - Count_Start;
real32 Width = Point_P2.x - Point_P1.x;
real32 Height = Point_P2.y - Point_P1.y;
real32 Count = Count_Start;
real32 t = 1;
while (Count < Count_End) {
LUT[(uint32)Count] = Normalize(Point_P1.y + (Height*((Count-Count_Start)/(Count_End - (Count_End - 256)))/Width));
Count++;
}
} else {
real32 Count_Start = (Point_P1.x * 256);
real32 Count_End = (Point_P2.x * 256);
real32 Count_Total = Count_End - Count_Start;
real32 Count = Count_Start;
real32 t = 0;
int Timeout = 0;
// This solver actually works kinda decently when the graph isn't that
// complex, taking less than 10 iterations per LUT value. It fails
// towards the edges and with harsh curves, going into the hundreds. The
// 1000 condition should only be hit when the solver is locked, which can
// happen when two points are close together on X.
while (Count < Count_End) {
real32 c = 2*t*t*t - 3*t*t;
real32 c0 = c + 1;
real32 c1 = t*t*t - 2*t*t + t;
real32 c2 = -c;
real32 c3 = t*t*t - t*t;
v2 Point = (c0 * Point_P1) + (c1 * m1) + (c2 * Point_P2) + (c3 * m2);
real32 TargetX = Count / 256;
if (Timeout == 1000) {
Point.x = TargetX;
printf("Solve between %.1f and %.1f reached 1000 iterations at %.f!\n", Count_Start, Count_End, Count);
}
// Only record the value if it's within a certain precision.
if (Point.x <= TargetX - Precision ||
Point.x >= TargetX + Precision) {
t = t * TargetX / Point.x;
Timeout++;
} else {
if (Point.y > 1.0f) {
LUT[(uint32)Count] = 1.0f;
} else if (Point.y < 0.0f)
LUT[(uint32)Count] = 0.0f;
else {
LUT[(uint32)Count] = Point.y;
}
t += (Point_Span / Count_Total);
Count++;
Timeout = 0;
}
}
}
}
static void
Effect_Software_Curves(int Width, int Height, int BytesPerPixel, void *EffectBitmapAddress, v2 *PointData, real32 PointCount, v4 PointCount_Col)
{
real32 LUT[5][256] = {};
for (int a = 0; a < 5; a++) {
int Num = (a == 0) ? (int)PointCount : (int)PointCount_Col.E[a-1];
v2 *CurvePoint = PointData + (MAX_PROPERTIES_PER_EFFECT / 5 * a);
for (int i = 0; i < Num; i++) {
v2 Point_P1 = CurvePoint[i];
v2 Point_P2 = CurvePoint[i + 1];
v2 Point_P0 = (i != 0) ? CurvePoint[i - 1] : V2(0, 0);
v2 Point_P3 = (i != (Num - 2)) ? CurvePoint[i + 2] : V2(1, 1);
v2 m1 = (Point_P2 - Point_P0) / (2 * Tau);
v2 m2 = (Point_P3 - Point_P1) / (2 * Tau);
CurvesSolver(LUT[a], Point_P1, Point_P2, m1, m2, i);
}
if (CurvePoint[0].x > 0.0f) {
real32 Count_Start = 0;
real32 Count_End = (CurvePoint[0].x * 255);
real32 Count = Count_Start;
while (Count < Count_End) {
LUT[a][(uint32)Count] = LUT[a][(uint32)Count_End];
Count++;
}
}
if (CurvePoint[Num-1].x < 1.0f) {
real32 Count_Start = (CurvePoint[Num-1].x * 255) - 0.5;
real32 Count_End = 255;
real32 Count = Count_Start;
while (Count < Count_End) {
LUT[a][(uint32)Count] = LUT[a][(uint32)Count_Start];
Count++;
}
}
for (int i = 0; i < Num; i++) {
if (CurvePoint[i].y == 1.0f)
LUT[a][255] = 1.0f;
}
}
uint64 Size = Width*Height;
int i = 0;
Assert(BytesPerPixel == 4);
while (i < Size) {
uint32 *Pixel = (uint32 *)EffectBitmapAddress + i;
uint8 A = (*Pixel >> 24);
uint8 B = (*Pixel >> 16);
uint8 G = (*Pixel >> 8);
uint8 R = (*Pixel >> 0);
#if 1
real32 R_Lookup = LUT[1][R];
real32 G_Lookup = LUT[2][G];
real32 B_Lookup = LUT[3][B];
real32 A_Lookup = LUT[4][A];
real32 R_Lookup_All = LUT[0][(uint32)(R_Lookup*255)];
real32 G_Lookup_All = LUT[0][(uint32)(G_Lookup*255)];
real32 B_Lookup_All = LUT[0][(uint32)(B_Lookup*255)];
#else
real32 R_Lookup_All = LUT[0][(uint32)(t.r)];
real32 G_Lookup_All = LUT[0][(uint32)(t.g)];
real32 B_Lookup_All = LUT[0][(uint32)(t.b)];
#endif
uint32 Result = (((uint32)((A_Lookup * 255.0f) + 0.5) << 24) |
((uint32)((B_Lookup_All * 255.0f) + 0.5) << 16) |
((uint32)((G_Lookup_All * 255.0f) + 0.5) << 8) |
((uint32)((R_Lookup_All * 255.0f) + 0.5) << 0));
*Pixel = Result;
i++;
}
}
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