57 lines
2 KiB
C
57 lines
2 KiB
C
#include "pxl8_blit.h"
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void pxl8_blit_hicolor(u16* fb, u32 fb_width, const u16* sprite, u32 atlas_width,
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i32 x, i32 y, u32 w, u32 h) {
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u16* dest_base = fb + y * fb_width + x;
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const u16* src_base = sprite;
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for (u32 row = 0; row < h; row++) {
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u16* dest_row = dest_base + row * fb_width;
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const u16* src_row = src_base + row * atlas_width;
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u32 col = 0;
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u32 count2 = w / 2;
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for (u32 i = 0; i < count2; i++) {
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u32 pixels = ((const u32*)src_row)[i];
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if (pixels == 0) {
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col += 2;
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continue;
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}
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dest_row[col] = pxl8_blend_hicolor((u16)(pixels), dest_row[col]);
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dest_row[col + 1] = pxl8_blend_hicolor((u16)(pixels >> 16), dest_row[col + 1]);
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col += 2;
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}
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if (w & 1) {
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dest_row[col] = pxl8_blend_hicolor(src_row[col], dest_row[col]);
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}
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}
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}
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void pxl8_blit_indexed(u8* fb, u32 fb_width, const u8* sprite, u32 atlas_width,
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i32 x, i32 y, u32 w, u32 h) {
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u8* dest_base = fb + y * fb_width + x;
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const u8* src_base = sprite;
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for (u32 row = 0; row < h; row++) {
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u8* dest_row = dest_base + row * fb_width;
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const u8* src_row = src_base + row * atlas_width;
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u32 col = 0;
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u32 count4 = w / 4;
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for (u32 i = 0; i < count4; i++) {
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u32 pixels = ((const u32*)src_row)[i];
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if (pixels == 0) {
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col += 4;
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continue;
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}
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dest_row[col] = pxl8_blend_indexed((u8)(pixels), dest_row[col]);
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dest_row[col + 1] = pxl8_blend_indexed((u8)(pixels >> 8), dest_row[col + 1]);
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dest_row[col + 2] = pxl8_blend_indexed((u8)(pixels >> 16), dest_row[col + 2]);
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dest_row[col + 3] = pxl8_blend_indexed((u8)(pixels >> 24), dest_row[col + 3]);
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col += 4;
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}
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for (; col < w; col++) {
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dest_row[col] = pxl8_blend_indexed(src_row[col], dest_row[col]);
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}
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}
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}
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