diff --git a/buffer.cpp b/buffer.cpp new file mode 100644 index 0000000..a6babec --- /dev/null +++ b/buffer.cpp @@ -0,0 +1,46 @@ +#pragma once + +#include + +#include "datatypes.cpp" +#include "helpers.cpp" + +namespace UwU { + // Buffer object - can be a wayland surface or a virtual buffer + class Buffer { + public: + Buffer(uint16_t width, uint16_t height) { + uint8_t pixels[width * height * 4]; + this->pixels = pixels; + this->width = width; + this->height = height; + this->stride = width * 4; + } + // Buffer(uint8_t* pixels, uint16_t width, uint16_t height, uint16_t stride) { + // this->pixels = pixels; + // this->width = width; + // this->height = height; + // this->stride = stride; + // } + Buffer() {} + uint8_t* pixels; + uint16_t width; + uint16_t height; + uint16_t stride; + + void drawPixel(Coord2 coord, Color color) { + size_t i = (size_t)coord.y * stride + (size_t)coord.x * 4; + uint8_t b0 = pixels[i + 0]; + uint8_t g0 = pixels[i + 1]; + uint8_t r0 = pixels[i + 2]; + uint8_t b = Helpers::lerp8(b0, color.b, color.a); + uint8_t g = Helpers::lerp8(g0, color.g, color.a); + uint8_t r = Helpers::lerp8(r0, color.r, color.a); + pixels[i + 0] = b; // B + pixels[i + 1] = g; // G + pixels[i + 2] = r; // R + pixels[i + 3] = 0xff; // A + return; + } + }; +} \ No newline at end of file diff --git a/draw b/draw new file mode 100755 index 0000000..cf98c58 Binary files /dev/null and b/draw differ diff --git a/draw.cpp b/draw.cpp new file mode 100644 index 0000000..96568e8 --- /dev/null +++ b/draw.cpp @@ -0,0 +1,313 @@ +/* Example program that links against the waymini library. + * No external dependencies beyond waymini itself and the C standard library. + */ + +#include "waymini.h" + +#include +#include +#include +#include + +#include "datatypes.cpp" +#include "helpers.cpp" +#include "triangle.cpp" +#include "buffer.cpp" +#include "surface.cpp" + +// this should be handled elsewhere, eventually, maybe, probably +static void onKey(void *user, uint32_t keycode, uint32_t state) { + if (keycode == 1) { + exit(1); + } + (void)user; + const char *label = state ? "down" : "up "; + printf("key %s: %u\n", label, keycode); + fflush(stdout); +} + +namespace UwU { + + class Draw { + private: + class Surface surface; + // 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 * surface.getStride() + (size_t)x * 4; + // uint8_t b0 = pixels[i + 0]; + // uint8_t g0 = pixels[i + 1]; + // uint8_t r0 = pixels[i + 2]; + // b = Helpers::lerp8(b0, b, a); + // g = Helpers::lerp8(g0, g, a); + // r = Helpers::lerp8(r0, r, a); + // pixels[i + 0] = b; // B + // pixels[i + 1] = g; // G + // pixels[i + 2] = r; // R + // pixels[i + 3] = 0xff; // A + // } + + // plot lines if m <= 1 + void lineLow(int32_t x0, int32_t y0, int32_t x1, int32_t y1, Color color) { + int32_t dx = x1 - x0; + int32_t dy = y1 - y0; + int32_t yi = 1; + if (dy < 0) { + yi = -1; + dy = -dy; + } + int32_t d = (2 * dy) - dx; + int32_t y = y0; + for (int32_t x = x0; x < x1; x++) { + // putPixel(x, y, color.r, color.g, color.b, color.a); + surface.buffer.drawPixel(Coord2((uint16_t)x, (uint16_t)y), color); + if (d > 0) { + y += yi; + d += (2 * (dy - dx)); + } else { + d += (2 * dy); + } + } + return; + } + + // plot lines if m >1 + void lineHigh(int32_t x0, int32_t y0, int32_t x1, int32_t y1, Color color) { + int32_t dx = x1 - x0; + int32_t dy = y1 - y0; + int32_t xi = 1; + if (dx < 0) { + xi = -1; + dx = -dx; + } + int32_t d = (2 * dx) - dy; + int32_t x = x0; + for (int32_t y = y0; y < y1; y++) { + // putPixel(x, y, color.r, color.g, color.b, color.a); + surface.buffer.drawPixel(Coord2((uint16_t)x, (uint16_t)y), color); + if (d > 0) { + x += xi; + d += (2 * (dx - dy)); + } else { + d += (2 * dx); + } + } + return; + } + + public: + + + Draw(uint16_t width, uint16_t height, waymini_key_cb onKey) + : surface(width, height, onKey) {} + + bool shouldClose() { + return surface.shouldClose(); + } + + void updateSize() { + surface.updateSize(); + return; + } + + uint16_t getWidth() { + return surface.getWidth(); + } + + uint16_t getHeight() { + return surface.getHeight(); + } + + uint16_t getStride() { + return surface.getStride(); + } + + void present() { + surface.present(); + return; + } + + void destroy() { + surface.destroy(); + return; + } + + // Draw a rectangle (duh) + void rectangle(Coord2 point0, Coord2 point1, Color color) { + if (point0.x > getWidth() || point0.y > getHeight() || point1.x > getWidth() || point1.y > getHeight()) {return;}; + for (uint32_t y = point0.y; y < point1.y; y++) { + for (uint32_t x = point0.x; x < point1.x; x++) { + // putPixel(x, y, color.r, color.g, color.b, color.a); + surface.buffer.drawPixel(Coord2((uint16_t)x, (uint16_t)y), color); + } + } + return; + } + + // Draws a rectangle with a 4-point color gradient + void rectangleGradient(Coord2 point0, Coord2 point1, Color colorUL, Color colorUR, Color colorLL, Color colorLR) { + // convert to int32_t and ensure x1>x0 && y1>y0 + int32_t x0, y0, x1, y1; + if (point0.x > point1.x) { + x0 = (int32_t)point1.x; + x1 = (int32_t)point0.x; + } else { + x0 = (int32_t)point0.x; + x1 = (int32_t)point1.x; + } + if (point0.y > point1.y) { + y0 = (int32_t)point1.y; + y1 = (int32_t)point0.y; + } else { + y0 = (int32_t)point0.y; + y1 = (int32_t)point1.y; + } + + // setup gradient coefficient arrays + int32_t w = x1 - x0 + 1; + int32_t h = y1 - y0 + 1; + int16_t xGrad[w]; + int16_t yGrad[h]; + + // calculate gradient coefficients + Helpers::bresenham(0, 0, w - 1, 255, xGrad); + Helpers::bresenham(0, 0, h - 1, 255, yGrad); + + // for each point calculate, alpha blend and print color + Color Lmix = Color(); + Color Rmix = Color(); + Color Xmix = Color(); + for (int32_t y = y0; y <= y1; y++) { + 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 = Helpers::lerpColor(Lmix, Rmix, (uint8_t)xGrad[x - x0]); + // putPixel(x, y, Xmix.r, Xmix.g, Xmix.b, Xmix.a); + surface.buffer.drawPixel(Coord2((uint16_t)x, (uint16_t)y), Xmix); + } + } + return; + } + + // Fill a simple gradient. Each row is stride bytes. + void rainbow() { + for (uint32_t y = 0; y < getHeight(); y++) { + for (uint32_t x = 0; x < getWidth(); x++) { + surface.buffer.drawPixel(Coord2((uint16_t)x, (uint16_t)y), Color( + (uint8_t)(y * 255 / getHeight()), + 0x00, + (uint8_t)(x * 255 / getWidth()), + 0xff)); + // size_t i = (size_t)y * getStride() + (size_t)x * 4; + // pixels[i + 0] = (uint8_t)(y * 255 / getHeight()); // B + // pixels[i + 1] = 0x00; // G + // pixels[i + 2] = (uint8_t)(x * 255 / getWidth()); // R + // pixels[i + 3] = 0xFF; // A + } + } + } + + // Draw a single point + void point (Coord2 point, Color color) { + if (point.x > getWidth() || point.y > getHeight()) {return;}; + // putPixel(point.x, point.y, color.r, color.g, color.b, color.a); + surface.buffer.drawPixel(point, color); + } + + // Uses Bresenham's line algorithm to draw line of any slope + void line (Coord2 point0, Coord2 point1, Color color) { + if (point0.x > getWidth() || point0.y > getHeight() || point1.x > getWidth() || point1.y > getHeight()) {return;}; + int32_t x0 = (int32_t)point0.x; + int32_t y0 = (int32_t)point0.y; + int32_t x1 = (int32_t)point1.x; + int32_t y1 = (int32_t)point1.y; + if (abs(y1 - y0) < abs(x1 - x0)) { + if (x0 > x1) { + lineLow(x1, y1, x0, y0, color); + } else { + lineLow(x0, y0, x1, y1, color); + } + } else { + if (y0 > y1) { + lineHigh(x1, y1, x0, y0, color); + } else { + lineHigh(x0, y0, x1, y1, color); + } + } + } + + // Draw a horizontally bounded trapezoid + // coords.y1 >= coords.y0 + // todo move to private and add public checks + void trapezoid (Trapezoid coords, Color color) { + printf("(%u, %u, %u, %u, %u, %u)", coords.y0, coords.y1, coords.xl0, coords.xl1, coords.xr0, coords.xr1); + uint16_t height = 1 + coords.y1 - coords.y0; + int16_t LeftBound[height]; + int16_t RightBound[height]; + + Helpers::bresenham(0, coords.xl0, coords.y1 - coords.y0, coords.xl1, LeftBound); + Helpers::bresenham(0, coords.xr0, coords.y1 - coords.y0, coords.xr1, RightBound); + + printf("leftbound\n"); + for (uint16_t i = 0; i < height; i++) { + printf("(%u, %u)\n", i, LeftBound[i]); + } + printf("rightbound\n"); + for (uint16_t i = 0; i < height; i++) { + printf("(%u, %u)\n", i, RightBound[i]); + } + + for (uint16_t i = 0; i < height; i++) { + for (uint16_t x = LeftBound[i]; x <= RightBound[i]; x++) { + // printf("(%u, %u)", x, i + coords.y0); + surface.buffer.drawPixel(Coord2(x, i + coords.y0), color); + } + } + return; + } + + // Draw a triangle + void triangle (uint16_t x0, uint16_t y0, uint16_t x1, uint16_t y1, uint16_t x2, uint16_t y2, Color color) { + Triangle triangle = Triangle(x0, y0, x1, y1, x2, y2); + triangle.draw(surface.buffer, color); + return; + } + }; + } + +int main(void) { + uint32_t w = 800, h = 480; + UwU::Color fuchsia = UwU::Color(0xb00b6940); + UwU::Color red = UwU::Color(0xff0000ff); + UwU::Color green = UwU::Color(0x00ff00ff); + UwU::Color blue = UwU::Color(0x0000ffff); + UwU::Color alpha = UwU::Color(0x00000000); + printf("r: %u, g:%u, b:%u, a:%u\n", fuchsia.r, fuchsia.g, fuchsia.b, fuchsia.a); + + // struct waymini *wm = waymini_create(w, h, on_key, NULL); + UwU::Draw draw = UwU::Draw(w, h, onKey); + + draw.rainbow(); + + + 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(300, 400, 360, 380, 600, 400), green); + draw.triangle(280, 100, 240, 290, 320, 300, green); + + + draw.point(UwU::Coord2(387, 43), green); + draw.line(UwU::Coord2(300, 100), UwU::Coord2(250, 469), green); + draw.line(UwU::Coord2(250, 100), UwU::Coord2(300, 469), green); + draw.line(UwU::Coord2(300, 100), UwU::Coord2(469, 250), green); + draw.line(UwU::Coord2(469, 100), UwU::Coord2(300, 250), green); + draw.line(UwU::Coord2(100, 300), UwU::Coord2(250, 469), green); + draw.line(UwU::Coord2(250, 300), UwU::Coord2(100, 469), green); + draw.line(UwU::Coord2(100, 300), UwU::Coord2(469, 250), green); + draw.line(UwU::Coord2(469, 300), UwU::Coord2(100, 250), green); + draw.present(); + + while (!draw.shouldClose()) {} + + draw.destroy(); + return 0; +} diff --git a/surface.cpp b/surface.cpp new file mode 100644 index 0000000..d11d318 --- /dev/null +++ b/surface.cpp @@ -0,0 +1,80 @@ +#pragma once + +#include "waymini.h" + +#include +#include +#include +#include + +#include "datatypes.cpp" +#include "buffer.cpp" + +namespace UwU { + class Surface { + public: + Surface(uint16_t width, uint16_t height, waymini_key_cb onKey) { + this->wm = waymini_create((uint32_t)width, (uint32_t)height, onKey, NULL); + if (!this->wm) exit(1); + + // this->buffer = Buffer( + // (uint8_t*)waymini_get_pixels(this->wm), + // waymini_get_width(this->wm), + // waymini_get_height(this->wm), + // waymini_get_stride(this->wm)); + this->buffer.pixels = (uint8_t*)waymini_get_pixels(this->wm); + this->buffer.width = waymini_get_width(this->wm); + this->buffer.height = waymini_get_height(this->wm); + this->buffer.stride = waymini_get_stride(this->wm); + printf("surface: %ux%u stride=%u\n", waymini_get_width(this->wm), waymini_get_height(this->wm), waymini_get_stride(this->wm)); + + if (!this->buffer.pixels) { + waymini_destroy(this->wm); + exit(1); + } + } + class Buffer buffer; + struct waymini* wm; + + // get current size of wayland surface and update buffer + void updateSize() { + buffer.width = waymini_get_width(wm); + buffer.height = waymini_get_height(wm); + buffer.stride = waymini_get_stride(wm); + return; + } + + uint32_t getWidth() { + updateSize(); + return buffer.width; + } + + uint32_t getHeight() { + updateSize(); + return buffer.height; + } + + uint32_t getStride() { + updateSize(); + return buffer.stride; + } + + void present() { + waymini_present(wm); + return; + } + + void destroy() { + waymini_destroy(wm); + return; + } + + bool shouldClose() { + if (waymini_should_close(wm) || waymini_dispatch(wm) < 0) { + return true; + } else { + return false; + } + } + }; +} \ No newline at end of file