65 lines
2.2 KiB
C++
65 lines
2.2 KiB
C++
#pragma once
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#include <stdint.h>
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#include "datatypes.cpp"
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#include "helpers.cpp"
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#include "shaders/shader.cpp"
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#include "shaders/colorshader.cpp"
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#include "shaders/gradientshader.cpp"
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namespace UwU {
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// Buffer object - can be a wayland surface or a virtual buffer
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class Buffer {
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public:
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Buffer(uint16_t width, uint16_t height) {
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uint8_t pixels[width * height * 4];
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this->pixels = pixels;
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this->width = width;
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this->height = height;
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this->stride = width * 4;
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}
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// Buffer(uint8_t* pixels, uint16_t width, uint16_t height, uint16_t stride) {
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// this->pixels = pixels;
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// this->width = width;
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// this->height = height;
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// this->stride = stride;
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// }
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Buffer() {}
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uint8_t* pixels;
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uint16_t width;
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uint16_t height;
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uint16_t stride;
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void drawPixel(Coord2 coord, Color color) {
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size_t i = (size_t)coord.y * stride + (size_t)coord.x * 4;
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uint8_t b0 = pixels[i + 0];
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uint8_t g0 = pixels[i + 1];
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uint8_t r0 = pixels[i + 2];
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uint8_t b = Helpers::lerp8(b0, color.b, color.a);
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uint8_t g = Helpers::lerp8(g0, color.g, color.a);
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uint8_t r = Helpers::lerp8(r0, color.r, color.a);
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pixels[i + 0] = b; // B
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pixels[i + 1] = g; // G
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pixels[i + 2] = r; // R
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pixels[i + 3] = 0xff; // A
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return;
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}
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void drawPixelShader(uint16_t x, uint16_t y, uint16_t u, uint16_t v, Shader& shader) {
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size_t i = (size_t)y * stride + (size_t)x * 4;
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uint8_t b0 = pixels[i + 0];
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uint8_t g0 = pixels[i + 1];
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uint8_t r0 = pixels[i + 2];
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Color newColor = shader.color(u, v);
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uint8_t b = Helpers::lerp8(b0, newColor.b, newColor.a);
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uint8_t g = Helpers::lerp8(g0, newColor.g, newColor.a);
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uint8_t r = Helpers::lerp8(r0, newColor.r, newColor.a);
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pixels[i + 0] = b; // B
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pixels[i + 1] = g; // G
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pixels[i + 2] = r; // R
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pixels[i + 3] = 0xff; // A
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return;
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}
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};
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} |