59 lines
2.3 KiB
C
59 lines
2.3 KiB
C
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#include "pxl8_blit.h"
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#include "pxl8_simd.h"
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void pxl8_blit_simd_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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for (; col + PXL8_SIMD_WIDTH_U8 <= w; col += PXL8_SIMD_WIDTH_U8) {
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pxl8_simd_vec src_vec = pxl8_simd_load_u8(src_row + col);
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pxl8_simd_vec dest_vec = pxl8_simd_load_u8(dest_row + col);
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pxl8_simd_vec zero = pxl8_simd_zero_u8();
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pxl8_simd_vec mask = pxl8_simd_cmpeq_u8(src_vec, zero);
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pxl8_simd_vec result = pxl8_simd_blendv_u8(src_vec, dest_vec, mask);
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pxl8_simd_store_u8(dest_row + col, result);
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}
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for (; col < w; col++) {
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if (src_row[col] != 0) {
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dest_row[col] = src_row[col];
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}
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}
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}
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}
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void pxl8_blit_simd_hicolor(u32* fb, u32 fb_width, const u32* sprite, u32 atlas_width,
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i32 x, i32 y, u32 w, u32 h) {
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u32* dest_base = fb + y * fb_width + x;
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const u32* src_base = sprite;
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for (u32 row = 0; row < h; row++) {
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u32* dest_row = dest_base + row * fb_width;
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const u32* src_row = src_base + row * atlas_width;
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u32 col = 0;
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for (; col + PXL8_SIMD_WIDTH_U32 <= w; col += PXL8_SIMD_WIDTH_U32) {
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pxl8_simd_vec src_vec = pxl8_simd_load_u32(src_row + col);
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pxl8_simd_vec dest_vec = pxl8_simd_load_u32(dest_row + col);
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pxl8_simd_vec alpha_mask = pxl8_simd_alpha_mask_u32();
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pxl8_simd_vec has_alpha = pxl8_simd_and(src_vec, alpha_mask);
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pxl8_simd_vec zero = pxl8_simd_zero_u8();
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pxl8_simd_vec mask = pxl8_simd_cmpeq_u32(has_alpha, zero);
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pxl8_simd_vec result = pxl8_simd_blendv_u32(src_vec, dest_vec, mask);
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pxl8_simd_store_u32(dest_row + col, result);
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}
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for (; col < w; col++) {
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if (src_row[col] & 0xFF000000) {
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dest_row[col] = src_row[col];
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}
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}
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}
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}
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