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split out helpers and datatypes into other files

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Annika
2026-07-05 09:44:34 -07:00
parent d2c76354e2
commit fe5b90a3bf
2 changed files with 40 additions and 95 deletions
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test
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test.cpp
+40 -95
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@@ -9,6 +9,9 @@
#include <stdlib.h>
#include <string.h>
#include "datatypes.cpp"
#include "helpers.cpp"
// this should be handled elsewhere, eventually, maybe, probably
static void on_key(void *user, uint32_t keycode, uint32_t state) {
(void)user;
@@ -18,77 +21,18 @@ static void on_key(void *user, uint32_t keycode, uint32_t state) {
}
namespace UwU {
// Color datatype returns individual channel values from rgba hexcode
struct Color {
Color(uint32_t hex) {
this->a = hex & 0x000000ff;
this->b = (hex & 0x0000ff00) >> 8;
this->g = (hex & 0x00ff0000) >> 16;
this->r = (hex & 0xff000000) >> 24;
}
Color() {}
uint8_t r;
uint8_t g;
uint8_t b;
uint8_t a;
};
// Coord2 datatype for xy coordinates, from top-left of surface
struct Coord2 {
Coord2(uint32_t x, uint32_t y) {
this->x = x;
this->y = y;
}
Coord2() {}
uint32_t x;
uint32_t y;
};
// trapezoid datatype (horizontally constrained)
struct Trapezoid {
Trapezoid(uint16_t y0, uint16_t y1, uint16_t xl0, uint16_t xl1, uint16_t xr0, uint16_t xr1) {
this->y0 = y0;
this->y1 = y1;
this->xl0 = xl0;
this->xl1 = xl1;
this->xr0 = xr0;
this->xr1 = xr1;
}
Trapezoid() {}
uint16_t y0;
uint16_t y1;
uint16_t xl0;
uint16_t xl1;
uint16_t xr0;
uint16_t xr1;
};
class Draw {
private:
uint8_t lerp8(uint8_t a, uint8_t b, uint8_t t) {
uint16_t product = (a * (255 - t)) + (b * t);
return product / 255;
}
Color lerpColor(Color a, Color b, uint8_t t) {
Color mixed = Color();
mixed.r = this->lerp8(a.r, b.r, t);
mixed.g = this->lerp8(a.g, b.g, t);
mixed.b = this->lerp8(a.b, b.b, t);
mixed.a = this->lerp8(a.a, b.a, t); // maybe the alpha channel should be handled differently?
return mixed;
}
void putPixel(uint32_t x, uint32_t y, uint8_t r, uint8_t g, uint8_t b, uint8_t a = 0xff) {
size_t i = (size_t)y * waymini_get_stride(this->wm) + (size_t)x * 4;
uint8_t b0 = this->pixels[i + 0];
uint8_t g0 = this->pixels[i + 1];
uint8_t r0 = this->pixels[i + 2];
b = lerp8(b0, b, a);
g = lerp8(g0, g, a);
r = lerp8(r0, r, a);
b = Helpers::lerp8(b0, b, a);
g = Helpers::lerp8(g0, g, a);
r = Helpers::lerp8(r0, r, a);
this->pixels[i + 0] = b; // B
this->pixels[i + 1] = g; // G
this->pixels[i + 2] = r; // R
@@ -292,10 +236,10 @@ namespace UwU {
Color Rmix = Color();
Color Xmix = Color();
for (int32_t y = y0; y <= y1; y++) {
Lmix = this->lerpColor(colorUL, colorLL, (uint8_t)yGrad[y - y0]);
Rmix = this->lerpColor(colorUR, colorLR, (uint8_t)yGrad[y - y0]);
Lmix = Helpers::lerpColor(colorUL, colorLL, (uint8_t)yGrad[y - y0]);
Rmix = Helpers::lerpColor(colorUR, colorLR, (uint8_t)yGrad[y - y0]);
for (int32_t x = x0; x <= x1; x++) {
Xmix = this->lerpColor(Lmix, Rmix, (uint8_t)xGrad[x - x0]);
Xmix = Helpers::lerpColor(Lmix, Rmix, (uint8_t)xGrad[x - x0]);
putPixel(x, y, Xmix.r, Xmix.g, Xmix.b, Xmix.a);
}
}
@@ -344,36 +288,37 @@ namespace UwU {
}
// Draws a horizontally bounded trapezoid
// TODO: FIX
void trapezoid (Trapezoid coords, Color color) {
UwU::Trapezoid saneCoords = coords;
if (coords.y0 > coords.y1) {
saneCoords.y0 = coords.y1;
saneCoords.y1 = coords.y0;
saneCoords.xl0 = coords.xl1;
saneCoords.xl1 = coords.xl0;
saneCoords.xr0 = coords.xr1;
saneCoords.xr1 = coords.xr0;
}
uint16_t tempVal;
bool hflip0 = false;
if (saneCoords.xl0 > saneCoords.xr0) {
tempVal = saneCoords.xl0;
saneCoords.xl0 = saneCoords.xr0;
saneCoords.xr0 = tempVal;
hflip0 = true;
}
if (saneCoords.xl1 > saneCoords.xr1) {
if (!hflip0) {
// invalid geometry; emit console warning and don't attempt to draw
// possible options are: don't draw, lazy draw (incorrect geometry) -
// or split into two (way more work)
return;
}
tempVal = saneCoords.xl1;
saneCoords.xl1 = saneCoords.xr1;
saneCoords.xr1 = tempVal;
}
this->pTrapezoid(saneCoords, color);
// UwU::Trapezoid saneCoords = coords;
// if (coords.y0 > coords.y1) {
// saneCoords.y0 = coords.y1;
// saneCoords.y1 = coords.y0;
// saneCoords.xl0 = coords.xl1;
// saneCoords.xl1 = coords.xl0;
// saneCoords.xr0 = coords.xr1;
// saneCoords.xr1 = coords.xr0;
// }
// uint16_t tempVal;
// bool hflip0 = false;
// if (saneCoords.xl0 > saneCoords.xr0) {
// tempVal = saneCoords.xl0;
// saneCoords.xl0 = saneCoords.xr0;
// saneCoords.xr0 = tempVal;
// hflip0 = true;
// }
// if (saneCoords.xl1 > saneCoords.xr1) {
// if (!hflip0) {
// // invalid geometry; emit console warning and don't attempt to draw
// // possible options are: don't draw, lazy draw (incorrect geometry) -
// // or split into two (way more work)
// return;
// }
// tempVal = saneCoords.xl1;
// saneCoords.xl1 = saneCoords.xr1;
// saneCoords.xr1 = tempVal;
// }
this->pTrapezoid(coords, color);
}
};
}
@@ -396,7 +341,7 @@ int main(void) {
draw.rectangle(UwU::Coord2(69, 69), UwU::Coord2(420, 420), fuchsia);
draw.rectangleGradient(UwU::Coord2(200, 200), UwU::Coord2(600, 400), red, blue, alpha, red);
draw.trapezoid(UwU::Trapezoid(500, 400, 360, 360, 600, 401), green);
// draw.trapezoid(UwU::Trapezoid(400, 500, 360, 360, 400, 601), green);
draw.point(UwU::Coord2(387, 43), green);