Karina
82 lines
3.3 KiB
C
82 lines
3.3 KiB
C
// SPDX-License-Identifier: GPL-3.0-or-later
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// Copyright (c) 2026 0xKarinyash
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// RIP shitgui -- you started it all
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#include <OS/OSScheduler.h>
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#include <OS/OSPanic.h>
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#include <IO/IOGraphics.h>
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#include <VM/Heap.h>
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#include <lib/String.h>
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enum {
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kIOGraphicsTransparencyKey = 0xFF00FF
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};
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UInt32 IOGraphicsGetPixel(IOGraphicsContext* context, IOGraphicsPoint* point) {
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if (!context->framebuffer || !point || point->x >= context->dimensions.width || point->y >= context->dimensions.height) return 0;
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return context->framebuffer[point->y * context->pixelsPerScanLine + point->x];
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}
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void IOGraphicsDrawImage(IOGraphicsContext* context, IOGraphicsPoint* point, IOGraphicsImage* image) {
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if (!context->framebuffer || !image) return;
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UInt32 startX = point->x;
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UInt32 startY = point->y;
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UInt32 drawW = image->size.width;
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UInt32 drawH = image->size.height;
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if (startX >= context->dimensions.width || startY >= context->dimensions.height) return;
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if (startX + drawW > context->dimensions.width) drawW = context->dimensions.width - startX;
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if (startY + drawH > context->dimensions.height) drawH = context->dimensions.height - startY;
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for (UInt32 y = 0; y < drawH; y++) {
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volatile UInt32 *destinationPointer = &context->framebuffer[(startY + y) * context->pixelsPerScanLine + startX];
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UInt32 *sourcePointer = &image->buffer[y * image->size.width];
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for (UInt32 x = 0; x < drawW; x++) {
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UInt32 color = sourcePointer[x];
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if (color != kIOGraphicsTransparencyKey) destinationPointer[x] = color;
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}
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}
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}
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void IOGraphicsDrawRectangle(IOGraphicsContext* context, IOGraphicsPoint* point, IOGraphicsSize* size, IOGraphicsColor color) {
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if (!context->framebuffer) return;
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UInt32 startX = point->x;
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UInt32 startY = point->y;
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UInt32 drawW = size->width;
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UInt32 drawH = size->height;
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if (startX >= context->dimensions.width || startY >= context->dimensions.height) return;
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if (startX + drawW > context->dimensions.width) drawW = context->dimensions.width - startX;
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if (startY + drawH > context->dimensions.height) drawH = context->dimensions.height - startY;
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for (UInt32 y = 0; y < drawH; y++) {
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volatile UInt32* rowPointer = &context->framebuffer[(startY + y) * context->pixelsPerScanLine + startX];
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for (UInt32 x = 0; x < drawW; x++) rowPointer[x] = color;
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}
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}
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void IOGraphicsDrawCharacter(IOGraphicsContext* context, IOGraphicsPoint* point, char c, IOGraphicsColor color, IOGraphicsFont* font) {
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if (!context->framebuffer) return;
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UInt32 startX = point->x;
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UInt32 startY = point->y;
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UInt32 drawW = font->size.width;
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UInt32 drawH = font->size.height;
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if (startX >= context->dimensions.width || startY >= context->dimensions.height) return;
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if (startX + drawW > context->dimensions.width) drawW = context->dimensions.width - startX;
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if (startY + drawH > context->dimensions.height) drawH = context->dimensions.height - startY;
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for (UInt32 y = 0; y < drawH; y++) {
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UInt8 bitmapRow = font->baseAddress[(unsigned char)c * font->size.height + y];
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volatile UInt32 *rowPointer = &context->framebuffer[(startY + y) * context->pixelsPerScanLine + startX];
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for (UInt32 x = 0; x < drawW; x++) {
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if (bitmapRow & (1 << (7 - x))) {
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rowPointer[x] = color;
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}
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}
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}
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} |