55 lines
1.9 KiB
C++
55 lines
1.9 KiB
C++
#include <graphics/draw.h>
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// --- Global (framebuffer) ---
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void global_draw_pixel(SUINT32 x, SUINT32 y, EFI_GRAPHICS_OUTPUT_BLT_PIXEL color) {
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EFI_GRAPHICS_OUTPUT_BLT_PIXEL *p = g_gfx.base + (g_gfx.hr * y) + x;
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p->Blue = color.Blue;
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p->Green = color.Green;
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p->Red = color.Red;
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p->Reserved = color.Reserved;
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}
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void global_draw_rect(SUINT32 bx, SUINT32 by, SUINT32 ex, SUINT32 ey,
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EFI_GRAPHICS_OUTPUT_BLT_PIXEL color) {
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for (SUINT32 x = bx; x <= ex; x++)
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for (SUINT32 y = by; y <= ey; y++)
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global_draw_pixel(x, y, color);
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}
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// --- Current target buffer ---
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void draw_pixel(SUINT32 x, SUINT32 y, EFI_GRAPHICS_OUTPUT_BLT_PIXEL color) {
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if (x >= g_draw_target.w || y >= g_draw_target.h) return;
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EFI_GRAPHICS_OUTPUT_BLT_PIXEL *p = g_draw_target.buf + (g_draw_target.w * y) + x;
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p->Blue = color.Blue;
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p->Green = color.Green;
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p->Red = color.Red;
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p->Reserved = color.Reserved;
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}
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void draw_rect(SUINT32 bx, SUINT32 by, SUINT32 ex, SUINT32 ey,
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EFI_GRAPHICS_OUTPUT_BLT_PIXEL color) {
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for (SUINT32 x = bx; x <= ex; x++)
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for (SUINT32 y = by; y <= ey; y++)
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draw_pixel(x, y, color);
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}
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void draw_pixel_alpha(SUINT32 x, SUINT32 y, EFI_GRAPHICS_OUTPUT_BLT_PIXEL color, SUINT8 alpha) {
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if (x >= g_draw_target.w || y >= g_draw_target.h) return;
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if (alpha == 0) return;
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EFI_GRAPHICS_OUTPUT_BLT_PIXEL *p = g_draw_target.buf + (g_draw_target.w * y) + x;
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if (alpha == 255) {
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p->Blue = color.Blue;
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p->Green = color.Green;
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p->Red = color.Red;
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p->Reserved = color.Reserved;
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return;
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}
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SUINT32 inv = 255 - alpha;
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p->Blue = (SUINT8)((color.Blue * alpha + p->Blue * inv) / 255);
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p->Green = (SUINT8)((color.Green * alpha + p->Green * inv) / 255);
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p->Red = (SUINT8)((color.Red * alpha + p->Red * inv) / 255);
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p->Reserved = color.Reserved;
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}
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