From 7454302cd04455d465832356742a2b09e0a9c7c3 Mon Sep 17 00:00:00 2001
From: Sam Lantinga <[EMAIL REDACTED]>
Date: Mon, 6 Oct 2025 15:54:38 -0700
Subject: [PATCH] Fixed 16-bit -> 32-bit blit lookup tables
The lookup tables weren't correct, e.g. 0xFFFF was being translated into 0xFFFFFFEF
---
src/video/SDL_blit_N.c | 787 +++++++++++++----------------------------
1 file changed, 242 insertions(+), 545 deletions(-)
diff --git a/src/video/SDL_blit_N.c b/src/video/SDL_blit_N.c
index 9c7b6b30af208..e8f5b71e76fb6 100644
--- a/src/video/SDL_blit_N.c
+++ b/src/video/SDL_blit_N.c
@@ -1166,22 +1166,23 @@ static void Blit_XRGB8888_RGB565(SDL_BlitInfo *info)
#ifdef SDL_HAVE_BLIT_N_RGB565
// Special optimized blit for RGB 5-6-5 --> 32-bit RGB surfaces
-#define RGB565_32(dst, src, map) (map[src[LO] * 2] + map[src[HI] * 2 + 1])
-static void Blit_RGB565_32(SDL_BlitInfo *info, const Uint32 *map)
+#define RGB565_32(src) (mapR[src >> 11] | mapG[(src >> 5) & 63] | mapB[src & 31] | Amask)
+
+static void Blit_RGB565_32(SDL_BlitInfo *info, const Uint32 *mapR, const Uint32 *mapG, const Uint32 *mapB, Uint32 Amask)
{
#ifndef USE_DUFFS_LOOP
int c;
#endif
int width, height;
- Uint8 *src;
+ const Uint16 *src;
Uint32 *dst;
int srcskip, dstskip;
// Set up some basic variables
width = info->dst_w;
height = info->dst_h;
- src = info->src;
- srcskip = info->src_skip;
+ src = (const Uint16 *)info->src;
+ srcskip = info->src_skip / 2;
dst = (Uint32 *)info->dst;
dstskip = info->dst_skip / 4;
@@ -1190,8 +1191,8 @@ static void Blit_RGB565_32(SDL_BlitInfo *info, const Uint32 *map)
/* *INDENT-OFF* */ // clang-format off
DUFFS_LOOP(
{
- *dst++ = RGB565_32(dst, src, map);
- src += 2;
+ *dst++ = RGB565_32(*src);
+ ++src;
},
width);
/* *INDENT-ON* */ // clang-format on
@@ -1202,28 +1203,28 @@ static void Blit_RGB565_32(SDL_BlitInfo *info, const Uint32 *map)
while (height--) {
// Copy in 4 pixel chunks
for (c = width / 4; c; --c) {
- *dst++ = RGB565_32(dst, src, map);
- src += 2;
- *dst++ = RGB565_32(dst, src, map);
- src += 2;
- *dst++ = RGB565_32(dst, src, map);
- src += 2;
- *dst++ = RGB565_32(dst, src, map);
- src += 2;
+ *dst++ = RGB565_32(*src);
+ ++src;
+ *dst++ = RGB565_32(*src);
+ ++src;
+ *dst++ = RGB565_32(*src);
+ ++src;
+ *dst++ = RGB565_32(*src);
+ ++src;
}
// Get any leftovers
switch (width & 3) {
case 3:
- *dst++ = RGB565_32(dst, src, map);
- src += 2;
+ *dst++ = RGB565_32(*src);
+ ++src;
SDL_FALLTHROUGH;
case 2:
- *dst++ = RGB565_32(dst, src, map);
- src += 2;
+ *dst++ = RGB565_32(*src);
+ ++src;
SDL_FALLTHROUGH;
case 1:
- *dst++ = RGB565_32(dst, src, map);
- src += 2;
+ *dst++ = RGB565_32(*src);
+ ++src;
break;
}
src += srcskip;
@@ -1232,554 +1233,250 @@ static void Blit_RGB565_32(SDL_BlitInfo *info, const Uint32 *map)
#endif // USE_DUFFS_LOOP
}
+#if 0
+// This is the code used to generate the lookup tables below:
+#include <SDL3/SDL.h>
+#include <stdio.h>
+
+static Uint32 Calculate(int v, int vmax, int shift)
+{
+ return (Uint32)SDL_roundf(v * 255.0f / vmax) << shift;
+}
+
+static void PrintLUT(const char *src, const char *dst, const char *channel, int bits, int shift)
+{
+ int v, vmax = (1 << bits) - 1;
+
+ printf("static const Uint32 %s_%s_LUT_%s[%d] = {", src, dst, channel, vmax + 1);
+ for (v = 0; v <= vmax; ++v) {
+ if ((v % 4) == 0) {
+ printf("\n ");
+ }
+ printf("0x%.8x", Calculate(v, vmax, shift));
+ if (v < vmax) {
+ printf(",");
+ if (((v + 1) % 4) != 0) {
+ printf(" ");
+ }
+ }
+ }
+ printf("\n};\n\n");
+}
+
+static void GenerateLUT(SDL_PixelFormat src, SDL_PixelFormat dst)
+{
+ const char *src_name = SDL_GetPixelFormatName(src) + 16;
+ const char *dst_name = SDL_GetPixelFormatName(dst) + 16;
+ const SDL_PixelFormatDetails *sfmt = SDL_GetPixelFormatDetails(src);
+ const SDL_PixelFormatDetails *dfmt = SDL_GetPixelFormatDetails(dst);
+
+ printf("// Special optimized blit for %s -> %s\n\n", src_name, dst_name);
+ PrintLUT(src_name, dst_name, "R", sfmt->Rbits, dfmt->Rshift);
+ PrintLUT(src_name, dst_name, "G", sfmt->Gbits, dfmt->Gshift);
+ PrintLUT(src_name, dst_name, "B", sfmt->Bbits, dfmt->Bshift);
+}
+
+int main(int argc, char *argv[])
+{
+ GenerateLUT(SDL_PIXELFORMAT_RGB565, SDL_PIXELFORMAT_ARGB8888);
+ GenerateLUT(SDL_PIXELFORMAT_RGB565, SDL_PIXELFORMAT_ABGR8888);
+ GenerateLUT(SDL_PIXELFORMAT_RGB565, SDL_PIXELFORMAT_RGBA8888);
+ GenerateLUT(SDL_PIXELFORMAT_RGB565, SDL_PIXELFORMAT_BGRA8888);
+}
+#endif // 0
+
/* *INDENT-OFF* */ // clang-format off
-// Special optimized blit for RGB 5-6-5 --> ARGB 8-8-8-8
-static const Uint32 RGB565_ARGB8888_LUT[512] = {
- 0x00000000, 0xff000000, 0x00000008, 0xff002000,
- 0x00000010, 0xff004000, 0x00000018, 0xff006100,
- 0x00000020, 0xff008100, 0x00000029, 0xff00a100,
- 0x00000031, 0xff00c200, 0x00000039, 0xff00e200,
- 0x00000041, 0xff080000, 0x0000004a, 0xff082000,
- 0x00000052, 0xff084000, 0x0000005a, 0xff086100,
- 0x00000062, 0xff088100, 0x0000006a, 0xff08a100,
- 0x00000073, 0xff08c200, 0x0000007b, 0xff08e200,
- 0x00000083, 0xff100000, 0x0000008b, 0xff102000,
- 0x00000094, 0xff104000, 0x0000009c, 0xff106100,
- 0x000000a4, 0xff108100, 0x000000ac, 0xff10a100,
- 0x000000b4, 0xff10c200, 0x000000bd, 0xff10e200,
- 0x000000c5, 0xff180000, 0x000000cd, 0xff182000,
- 0x000000d5, 0xff184000, 0x000000de, 0xff186100,
- 0x000000e6, 0xff188100, 0x000000ee, 0xff18a100,
- 0x000000f6, 0xff18c200, 0x000000ff, 0xff18e200,
- 0x00000400, 0xff200000, 0x00000408, 0xff202000,
- 0x00000410, 0xff204000, 0x00000418, 0xff206100,
- 0x00000420, 0xff208100, 0x00000429, 0xff20a100,
- 0x00000431, 0xff20c200, 0x00000439, 0xff20e200,
- 0x00000441, 0xff290000, 0x0000044a, 0xff292000,
- 0x00000452, 0xff294000, 0x0000045a, 0xff296100,
- 0x00000462, 0xff298100, 0x0000046a, 0xff29a100,
- 0x00000473, 0xff29c200, 0x0000047b, 0xff29e200,
- 0x00000483, 0xff310000, 0x0000048b, 0xff312000,
- 0x00000494, 0xff314000, 0x0000049c, 0xff316100,
- 0x000004a4, 0xff318100, 0x000004ac, 0xff31a100,
- 0x000004b4, 0xff31c200, 0x000004bd, 0xff31e200,
- 0x000004c5, 0xff390000, 0x000004cd, 0xff392000,
- 0x000004d5, 0xff394000, 0x000004de, 0xff396100,
- 0x000004e6, 0xff398100, 0x000004ee, 0xff39a100,
- 0x000004f6, 0xff39c200, 0x000004ff, 0xff39e200,
- 0x00000800, 0xff410000, 0x00000808, 0xff412000,
- 0x00000810, 0xff414000, 0x00000818, 0xff416100,
- 0x00000820, 0xff418100, 0x00000829, 0xff41a100,
- 0x00000831, 0xff41c200, 0x00000839, 0xff41e200,
- 0x00000841, 0xff4a0000, 0x0000084a, 0xff4a2000,
- 0x00000852, 0xff4a4000, 0x0000085a, 0xff4a6100,
- 0x00000862, 0xff4a8100, 0x0000086a, 0xff4aa100,
- 0x00000873, 0xff4ac200, 0x0000087b, 0xff4ae200,
- 0x00000883, 0xff520000, 0x0000088b, 0xff522000,
- 0x00000894, 0xff524000, 0x0000089c, 0xff526100,
- 0x000008a4, 0xff528100, 0x000008ac, 0xff52a100,
- 0x000008b4, 0xff52c200, 0x000008bd, 0xff52e200,
- 0x000008c5, 0xff5a0000, 0x000008cd, 0xff5a2000,
- 0x000008d5, 0xff5a4000, 0x000008de, 0xff5a6100,
- 0x000008e6, 0xff5a8100, 0x000008ee, 0xff5aa100,
- 0x000008f6, 0xff5ac200, 0x000008ff, 0xff5ae200,
- 0x00000c00, 0xff620000, 0x00000c08, 0xff622000,
- 0x00000c10, 0xff624000, 0x00000c18, 0xff626100,
- 0x00000c20, 0xff628100, 0x00000c29, 0xff62a100,
- 0x00000c31, 0xff62c200, 0x00000c39, 0xff62e200,
- 0x00000c41, 0xff6a0000, 0x00000c4a, 0xff6a2000,
- 0x00000c52, 0xff6a4000, 0x00000c5a, 0xff6a6100,
- 0x00000c62, 0xff6a8100, 0x00000c6a, 0xff6aa100,
- 0x00000c73, 0xff6ac200, 0x00000c7b, 0xff6ae200,
- 0x00000c83, 0xff730000, 0x00000c8b, 0xff732000,
- 0x00000c94, 0xff734000, 0x00000c9c, 0xff736100,
- 0x00000ca4, 0xff738100, 0x00000cac, 0xff73a100,
- 0x00000cb4, 0xff73c200, 0x00000cbd, 0xff73e200,
- 0x00000cc5, 0xff7b0000, 0x00000ccd, 0xff7b2000,
- 0x00000cd5, 0xff7b4000, 0x00000cde, 0xff7b6100,
- 0x00000ce6, 0xff7b8100, 0x00000cee, 0xff7ba100,
- 0x00000cf6, 0xff7bc200, 0x00000cff, 0xff7be200,
- 0x00001000, 0xff830000, 0x00001008, 0xff832000,
- 0x00001010, 0xff834000, 0x00001018, 0xff836100,
- 0x00001020, 0xff838100, 0x00001029, 0xff83a100,
- 0x00001031, 0xff83c200, 0x00001039, 0xff83e200,
- 0x00001041, 0xff8b0000, 0x0000104a, 0xff8b2000,
- 0x00001052, 0xff8b4000, 0x0000105a, 0xff8b6100,
- 0x00001062, 0xff8b8100, 0x0000106a, 0xff8ba100,
- 0x00001073, 0xff8bc200, 0x0000107b, 0xff8be200,
- 0x00001083, 0xff940000, 0x0000108b, 0xff942000,
- 0x00001094, 0xff944000, 0x0000109c, 0xff946100,
- 0x000010a4, 0xff948100, 0x000010ac, 0xff94a100,
- 0x000010b4, 0xff94c200, 0x000010bd, 0xff94e200,
- 0x000010c5, 0xff9c0000, 0x000010cd, 0xff9c2000,
- 0x000010d5, 0xff9c4000, 0x000010de, 0xff9c6100,
- 0x000010e6, 0xff9c8100, 0x000010ee, 0xff9ca100,
- 0x000010f6, 0xff9cc200, 0x000010ff, 0xff9ce200,
- 0x00001400, 0xffa40000, 0x00001408, 0xffa42000,
- 0x00001410, 0xffa44000, 0x00001418, 0xffa46100,
- 0x00001420, 0xffa48100, 0x00001429, 0xffa4a100,
- 0x00001431, 0xffa4c200, 0x00001439, 0xffa4e200,
- 0x00001441, 0xffac0000, 0x0000144a, 0xffac2000,
- 0x00001452, 0xffac4000, 0x0000145a, 0xffac6100,
- 0x00001462, 0xffac8100, 0x0000146a, 0xffaca100,
- 0x00001473, 0xffacc200, 0x0000147b, 0xfface200,
- 0x00001483, 0xffb40000, 0x0000148b, 0xffb42000,
- 0x00001494, 0xffb44000, 0x0000149c, 0xffb46100,
- 0x000014a4, 0xffb48100, 0x000014ac, 0xffb4a100,
- 0x000014b4, 0xffb4c200, 0x000014bd, 0xffb4e200,
- 0x000014c5, 0xffbd0000, 0x000014cd, 0xffbd2000,
- 0x000014d5, 0xffbd4000, 0x000014de, 0xffbd6100,
- 0x000014e6, 0xffbd8100, 0x000014ee, 0xffbda100,
- 0x000014f6, 0xffbdc200, 0x000014ff, 0xffbde200,
- 0x00001800, 0xffc50000, 0x00001808, 0xffc52000,
- 0x00001810, 0xffc54000, 0x00001818, 0xffc56100,
- 0x00001820, 0xffc58100, 0x00001829, 0xffc5a100,
- 0x00001831, 0xffc5c200, 0x00001839, 0xffc5e200,
- 0x00001841, 0xffcd0000, 0x0000184a, 0xffcd2000,
- 0x00001852, 0xffcd4000, 0x0000185a, 0xffcd6100,
- 0x00001862, 0xffcd8100, 0x0000186a, 0xffcda100,
- 0x00001873, 0xffcdc200, 0x0000187b, 0xffcde200,
- 0x00001883, 0xffd50000, 0x0000188b, 0xffd52000,
- 0x00001894, 0xffd54000, 0x0000189c, 0xffd56100,
- 0x000018a4, 0xffd58100, 0x000018ac, 0xffd5a100,
- 0x000018b4, 0xffd5c200, 0x000018bd, 0xffd5e200,
- 0x000018c5, 0xffde0000, 0x000018cd, 0xffde2000,
- 0x000018d5, 0xffde4000, 0x000018de, 0xffde6100,
- 0x000018e6, 0xffde8100, 0x000018ee, 0xffdea100,
- 0x000018f6, 0xffdec200, 0x000018ff, 0xffdee200,
- 0x00001c00, 0xffe60000, 0x00001c08, 0xffe62000,
- 0x00001c10, 0xffe64000, 0x00001c18, 0xffe66100,
- 0x00001c20, 0xffe68100, 0x00001c29, 0xffe6a100,
- 0x00001c31, 0xffe6c200, 0x00001c39, 0xffe6e200,
- 0x00001c41, 0xffee0000, 0x00001c4a, 0xffee2000,
- 0x00001c52, 0xffee4000, 0x00001c5a, 0xffee6100,
- 0x00001c62, 0xffee8100, 0x00001c6a, 0xffeea100,
- 0x00001c73, 0xffeec200, 0x00001c7b, 0xffeee200,
- 0x00001c83, 0xfff60000, 0x00001c8b, 0xfff62000,
- 0x00001c94, 0xfff64000, 0x00001c9c, 0xfff66100,
- 0x00001ca4, 0xfff68100, 0x00001cac, 0xfff6a100,
- 0x00001cb4, 0xfff6c200, 0x00001cbd, 0xfff6e200,
- 0x00001cc5, 0xffff0000, 0x00001ccd, 0xffff2000,
- 0x00001cd5, 0xffff4000, 0x00001cde, 0xffff6100,
- 0x00001ce6, 0xffff8100, 0x00001cee, 0xffffa100,
- 0x00001cf6, 0xffffc200, 0x00001cff, 0xffffe200
+// Special optimized blit for RGB565 -> ARGB8888
+
+static const Uint32 RGB565_ARGB8888_LUT_R[32] = {
+ 0x00000000, 0x00080000, 0x00100000, 0x00190000,
+ 0x00210000, 0x00290000, 0x00310000, 0x003a0000,
+ 0x00420000, 0x004a0000, 0x00520000, 0x005a0000,
+ 0x00630000, 0x006b0000, 0x00730000, 0x007b0000,
+ 0x00840000, 0x008c0000, 0x00940000, 0x009c0000,
+ 0x00a50000, 0x00ad0000, 0x00b50000, 0x00bd0000,
+ 0x00c50000, 0x00ce0000, 0x00d60000, 0x00de0000,
+ 0x00e60000, 0x00ef0000, 0x00f70000, 0x00ff0000
+};
+
+static const Uint32 RGB565_ARGB8888_LUT_G[64] = {
+ 0x00000000, 0x00000400, 0x00000800, 0x00000c00,
+ 0x00001000, 0x00001400, 0x00001800, 0x00001c00,
+ 0x00002000, 0x00002400, 0x00002800, 0x00002d00,
+ 0x00003100, 0x00003500, 0x00003900, 0x00003d00,
+ 0x00004100, 0x00004500, 0x00004900, 0x00004d00,
+ 0x00005100, 0x00005500, 0x00005900, 0x00005d00,
+ 0x00006100, 0x00006500, 0x00006900, 0x00006d00,
+ 0x00007100, 0x00007500, 0x00007900, 0x00007d00,
+ 0x00008200, 0x00008600, 0x00008a00, 0x00008e00,
+ 0x00009200, 0x00009600, 0x00009a00, 0x00009e00,
+ 0x0000a200, 0x0000a600, 0x0000aa00, 0x0000ae00,
+ 0x0000b200, 0x0000b600, 0x0000ba00, 0x0000be00,
+ 0x0000c200, 0x0000c600, 0x0000ca00, 0x0000ce00,
+ 0x0000d200, 0x0000d700, 0x0000db00, 0x0000df00,
+ 0x0000e300, 0x0000e700, 0x0000eb00, 0x0000ef00,
+ 0x0000f300, 0x0000f700, 0x0000fb00, 0x0000ff00
+};
+
+static const Uint32 RGB565_ARGB8888_LUT_B[32] = {
+ 0x00000000, 0x00000008, 0x00000010, 0x00000019,
+ 0x00000021, 0x00000029, 0x00000031, 0x0000003a,
+ 0x00000042, 0x0000004a, 0x00000052, 0x0000005a,
+ 0x00000063, 0x0000006b, 0x00000073, 0x0000007b,
+ 0x00000084, 0x0000008c, 0x00000094, 0x0000009c,
+ 0x000000a5, 0x000000ad, 0x000000b5, 0x000000bd,
+ 0x000000c5, 0x000000ce, 0x000000d6, 0x000000de,
+ 0x000000e6, 0x000000ef, 0x000000f7, 0x000000ff
};
static void Blit_RGB565_ARGB8888(SDL_BlitInfo * info)
{
- Blit_RGB565_32(info, RGB565_ARGB8888_LUT);
+ Blit_RGB565_32(info, RGB565_ARGB8888_LUT_R, RGB565_ARGB8888_LUT_G, RGB565_ARGB8888_LUT_B, 0xFF000000);
}
-// Special optimized blit for RGB 5-6-5 --> ABGR 8-8-8-8
-static const Uint32 RGB565_ABGR8888_LUT[512] = {
- 0xff000000, 0x00000000, 0xff080000, 0x00002000,
- 0xff100000, 0x00004000, 0xff180000, 0x00006100,
- 0xff200000, 0x00008100, 0xff290000, 0x0000a100,
- 0xff310000, 0x0000c200, 0xff390000, 0x0000e200,
- 0xff410000, 0x00000008, 0xff4a0000, 0x00002008,
- 0xff520000, 0x00004008, 0xff5a0000, 0x00006108,
- 0xff620000, 0x00008108, 0xff6a0000, 0x0000a108,
- 0xff730000, 0x0000c208, 0xff7b0000, 0x0000e208,
- 0xff830000, 0x00000010, 0xff8b0000, 0x00002010,
- 0xff940000, 0x00004010, 0xff9c0000, 0x00006110,
- 0xffa40000, 0x00008110, 0xffac0000, 0x0000a110,
- 0xffb40000, 0x0000c210, 0xffbd0000, 0x0000e210,
- 0xffc50000, 0x00000018, 0xffcd0000, 0x00002018,
- 0xffd50000, 0x00004018, 0xffde0000, 0x00006118,
- 0xffe60000, 0x00008118, 0xffee0000, 0x0000a118,
- 0xfff60000, 0x0000c218, 0xffff0000, 0x0000e218,
- 0xff000400, 0x00000020, 0xff080400, 0x00002020,
- 0xff100400, 0x00004020, 0xff180400, 0x00006120,
- 0xff200400, 0x00008120, 0xff290400, 0x0000a120,
- 0xff310400, 0x0000c220, 0xff390400, 0x0000e220,
- 0xff410400, 0x00000029, 0xff4a0400, 0x00002029,
- 0xff520400, 0x00004029, 0xff5a0400, 0x00006129,
- 0xff620400, 0x00008129, 0xff6a0400, 0x0000a129,
- 0xff730400, 0x0000c229, 0xff7b0400, 0x0000e229,
- 0xff830400, 0x00000031, 0xff8b0400, 0x00002031,
- 0xff940400, 0x00004031, 0xff9c0400, 0x00006131,
- 0xffa40400, 0x00008131, 0xffac0400, 0x0000a131,
- 0xffb40400, 0x0000c231, 0xffbd0400, 0x0000e231,
- 0xffc50400, 0x00000039, 0xffcd0400, 0x00002039,
- 0xffd50400, 0x00004039, 0xffde0400, 0x00006139,
- 0xffe60400, 0x00008139, 0xffee0400, 0x0000a139,
- 0xfff60400, 0x0000c239, 0xffff0400, 0x0000e239,
- 0xff000800, 0x00000041, 0xff080800, 0x00002041,
- 0xff100800, 0x00004041, 0xff180800, 0x00006141,
- 0xff200800, 0x00008141, 0xff290800, 0x0000a141,
- 0xff310800, 0x0000c241, 0xff390800, 0x0000e241,
- 0xff410800, 0x0000004a, 0xff4a0800, 0x0000204a,
- 0xff520800, 0x0000404a, 0xff5a0800, 0x0000614a,
- 0xff620800, 0x0000814a, 0xff6a0800, 0x0000a14a,
- 0xff730800, 0x0000c24a, 0xff7b0800, 0x0000e24a,
- 0xff830800, 0x00000052, 0xff8b0800, 0x00002052,
- 0xff940800, 0x00004052, 0xff9c0800, 0x00006152,
- 0xffa40800, 0x00008152, 0xffac0800, 0x0000a152,
- 0xffb40800, 0x0000c252, 0xffbd0800, 0x0000e252,
- 0xffc50800, 0x0000005a, 0xffcd0800, 0x0000205a,
- 0xffd50800, 0x0000405a, 0xffde0800, 0x0000615a,
- 0xffe60800, 0x0000815a, 0xffee0800, 0x0000a15a,
- 0xfff60800, 0x0000c25a, 0xffff0800, 0x0000e25a,
- 0xff000c00, 0x00000062, 0xff080c00, 0x00002062,
- 0xff100c00, 0x00004062, 0xff180c00, 0x00006162,
- 0xff200c00, 0x00008162, 0xff290c00, 0x0000a162,
- 0xff310c00, 0x0000c262, 0xff390c00, 0x0000e262,
- 0xff410c00, 0x0000006a, 0xff4a0c00, 0x0000206a,
- 0xff520c00, 0x0000406a, 0xff5a0c00, 0x0000616a,
- 0xff620c00, 0x0000816a, 0xff6a0c00, 0x0000a16a,
- 0xff730c00, 0x0000c26a, 0xff7b0c00, 0x0000e26a,
- 0xff830c00, 0x00000073, 0xff8b0c00, 0x00002073,
- 0xff940c00, 0x00004073, 0xff9c0c00, 0x00006173,
- 0xffa40c00, 0x00008173, 0xffac0c00, 0x0000a173,
- 0xffb40c00, 0x0000c273, 0xffbd0c00, 0x0000e273,
- 0xffc50c00, 0x0000007b, 0xffcd0c00, 0x0000207b,
- 0xffd50c00, 0x0000407b, 0xffde0c00, 0x0000617b,
- 0xffe60c00, 0x0000817b, 0xffee0c00, 0x0000a17b,
- 0xfff60c00, 0x0000c27b, 0xffff0c00, 0x0000e27b,
- 0xff001000, 0x00000083, 0xff081000, 0x00002083,
- 0xff101000, 0x00004083, 0xff181000, 0x00006183,
- 0xff201000, 0x00008183, 0xff291000, 0x0000a183,
- 0xff311000, 0x0000c283, 0xff391000, 0x0000e283,
- 0xff411000, 0x0000008b, 0xff4a1000, 0x0000208b,
- 0xff521000, 0x0000408b, 0xff5a1000, 0x0000618b,
- 0xff621000, 0x0000818b, 0xff6a1000, 0x0000a18b,
- 0xff731000, 0x0000c28b, 0xff7b1000, 0x0000e28b,
- 0xff831000, 0x00000094, 0xff8b1000, 0x00002094,
- 0xff941000, 0x00004094, 0xff9c1000, 0x00006194,
- 0xffa41000, 0x00008194, 0xffac1000, 0x0000a194,
- 0xffb41000, 0x0000c294, 0xffbd1000, 0x0000e294,
- 0xffc51000, 0x0000009c, 0xffcd1000, 0x0000209c,
- 0xffd51000, 0x0000409c, 0xffde1000, 0x0000619c,
- 0xffe61000, 0x0000819c, 0xffee1000, 0x0000a19c,
- 0xfff61000, 0x0000c29c, 0xffff1000, 0x0000e29c,
- 0xff001400, 0x000000a4, 0xff081400, 0x000020a4,
- 0xff101400, 0x000040a4, 0xff181400, 0x000061a4,
- 0xff201400, 0x000081a4, 0xff291400, 0x0000a1a4,
- 0xff311400, 0x0000c2a4, 0xff391400, 0x0000e2a4,
- 0xff411400, 0x000000ac, 0xff4a1400, 0x000020ac,
- 0xff521400, 0x000040ac, 0xff5a1400, 0x000061ac,
- 0xff621400, 0x000081ac, 0xff6a1400, 0x0000a1ac,
- 0xff731400, 0x0000c2ac, 0xff7b1400, 0x0000e2ac,
- 0xff831400, 0x000000b4, 0xff8b1400, 0x000020b4,
- 0xff941400, 0x000040b4, 0xff9c1400, 0x000061b4,
- 0xffa41400, 0x000081b4, 0xffac1400, 0x0000a1b4,
- 0xffb41400, 0x0000c2b4, 0xffbd1400, 0x0000e2b4,
- 0xffc51400, 0x000000bd, 0xffcd1400, 0x000020bd,
- 0xffd51400, 0x000040bd, 0xffde1400, 0x000061bd,
- 0xffe61400, 0x000081bd, 0xffee1400, 0x0000a1bd,
- 0xfff61400, 0x0000c2bd, 0xffff1400, 0x0000e2bd,
- 0xff001800, 0x000000c5, 0xff081800, 0x000020c5,
- 0xff101800, 0x000040c5, 0xff181800, 0x000061c5,
- 0xff201800, 0x000081c5, 0xff291800, 0x0000a1c5,
- 0xff311800, 0x0000c2c5, 0xff391800, 0x0000e2c5,
- 0xff411800, 0x000000cd, 0xff4a1800, 0x000020cd,
- 0xff521800, 0x000040cd, 0xff5a1800, 0x000061cd,
- 0xff621800, 0x000081cd, 0xff6a1800, 0x0000a1cd,
- 0xff731800, 0x0000c2cd, 0xff7b1800, 0x0000e2cd,
- 0xff831800, 0x000000d5, 0xff8b1800, 0x000020d5,
- 0xff941800, 0x000040d5, 0xff9c1800, 0x000061d5,
- 0xffa41800, 0x000081d5, 0xffac1800, 0x0000a1d5,
- 0xffb41800, 0x0000c2d5, 0xffbd1800, 0x0000e2d5,
- 0xffc51800, 0x000000de, 0xffcd1800, 0x000020de,
- 0xffd51800, 0x000040de, 0xffde1800, 0x000061de,
- 0xffe61800, 0x000081de, 0xffee1800, 0x0000a1de,
- 0xfff61800, 0x0000c2de, 0xffff1800, 0x0000e2de,
- 0xff001c00, 0x000000e6, 0xff081c00, 0x000020e6,
- 0xff101c00, 0x000040e6, 0xff181c00, 0x000061e6,
- 0xff201c00, 0x000081e6, 0xff291c00, 0x0000a1e6,
- 0xff311c00, 0x0000c2e6, 0xff391c00, 0x0000e2e6,
- 0xff411c00, 0x000000ee, 0xff4a1c00, 0x000020ee,
- 0xff521c00, 0x000040ee, 0xff5a1c00, 0x000061ee,
- 0xff621c00, 0x000081ee, 0xff6a1c00, 0x0000a1ee,
- 0xff731c00, 0x0000c2ee, 0xff7b1c00, 0x0000e2ee,
- 0xff831c00, 0x000000f6, 0xff8b1c00, 0x000020f6,
- 0xff941c00, 0x000040f6, 0xff9c1c00, 0x000061f6,
- 0xffa41c00, 0x000081f6, 0xffac1c00, 0x0000a1f6,
- 0xffb41c00, 0x0000c2f6, 0xffbd1c00, 0x0000e2f6,
- 0xffc51c00, 0x000000ff, 0xffcd1c00, 0x000020ff,
- 0xffd51c00, 0x000040ff, 0xffde1c00, 0x000061ff,
- 0xffe61c00, 0x000081ff, 0xffee1c00, 0x0000a1ff,
- 0xfff61c00, 0x0000c2ff, 0xffff1c00, 0x0000e2ff
+// Special optimized blit for RGB565 -> ABGR8888
+
+static const Uint32 RGB565_ABGR8888_LUT_R[32] = {
+ 0x00000000, 0x00000008, 0x00000010, 0x00000019,
+ 0x00000021, 0x00000029, 0x00000031, 0x0000003a,
+ 0x00000042, 0x0000004a, 0x00000052, 0x0000005a,
+ 0x00000063, 0x0000006b, 0x00000073, 0x0000007b,
+ 0x00000084, 0x0000008c, 0x00000094, 0x0000009c,
+ 0x000000a5, 0x000000ad, 0x000000b5, 0x000000bd,
+ 0x000000c5, 0x000000ce, 0x000000d6, 0x000000de,
+ 0x000000e6, 0x000000ef, 0x000000f7, 0x000000ff
+};
+
+static const Uint32 RGB565_ABGR8888_LUT_G[64] = {
+ 0x00000000, 0x00000400, 0x00000800, 0x00000c00,
+ 0x00001000, 0x00001400, 0x00001800, 0x00001c00,
+ 0x00002000, 0x00002400, 0x00002800, 0x00002d00,
+ 0x00003100, 0x00003500, 0x00003900, 0x00003d00,
+ 0x00004100, 0x00004500, 0x00004900, 0x00004d00,
+ 0x00005100, 0x00005500, 0x00005900, 0x00005d00,
+ 0x00006100, 0x00006500, 0x00006900, 0x00006d00,
+ 0x00007100, 0x00007500, 0x00007900, 0x00007d00,
+ 0x00008200, 0x00008600, 0x00008a00, 0x00008e00,
+ 0x00009200, 0x00009600, 0x00009a00, 0x00009e00,
+ 0x0000a200, 0x0000a600, 0x0000aa00, 0x0000ae00,
+ 0x0000b200, 0x0000b600, 0x0000ba00, 0x0000be00,
+ 0x0000c200, 0x0000c600, 0x0000ca00, 0x0000ce00,
+ 0x0000d200, 0x0000d700, 0x0000db00, 0x0000df00,
+ 0x0000e300, 0x0000e700, 0x0000eb00, 0x0000ef00,
+ 0x0000f300, 0x0000f700, 0x0000fb00, 0x0000ff00
+};
+
+static const Uint32 RGB565_ABGR8888_LUT_B[32] = {
+ 0x00000000, 0x00080000, 0x00100000, 0x00190000,
+ 0x00210000, 0x00290000, 0x00310000, 0x003a0000,
+ 0x00420000, 0x004a0000, 0x00520000, 0x005a0000,
+ 0x00630000, 0x006b0000, 0x00730000, 0x007b0000,
+ 0x00840000, 0x008c0000, 0x00940000, 0x009c0000,
+ 0x00a50000, 0x00ad0000, 0x00b50000, 0x00bd0000,
+ 0x00c50000, 0x00ce0000, 0x00d60000, 0x00de0000,
+ 0x00e60000, 0x00ef0000, 0x00f70000, 0x00ff0000
};
static void Blit_RGB565_ABGR8888(SDL_BlitInfo * info)
{
- Blit_RGB565_32(info, RGB565_ABGR8888_LUT);
+ Blit_RGB565_32(info, RGB565_ABGR8888_LUT_R, RGB565_ABGR8888_LUT_G, RGB565_ABGR8888_LUT_B, 0xFF000000);
}
-// Special optimized blit for RGB 5-6-5 --> RGBA 8-8-8-8
-static const Uint32 RGB565_RGBA8888_LUT[512] = {
- 0x000000ff, 0x00000000, 0x000008ff, 0x00200000,
- 0x000010ff, 0x00400000, 0x000018ff, 0x00610000,
- 0x000020ff, 0x00810000, 0x000029ff, 0x00a10000,
- 0x000031ff, 0x00c20000, 0x000039ff, 0x00e20000,
- 0x000041ff, 0x08000000, 0x00004aff, 0x08200000,
- 0x000052ff, 0x08400000, 0x00005aff, 0x08610000,
- 0x000062ff, 0x08810000, 0x00006aff, 0x08a10000,
- 0x000073ff, 0x08c20000, 0x00007bff, 0x08e20000,
- 0x000083ff, 0x10000000, 0x00008bff, 0x10200000,
- 0x000094ff, 0x10400000, 0x00009cff, 0x10610000,
- 0x0000a4ff, 0x10810000, 0x0000acff, 0x10a10000,
- 0x0000b4ff, 0x10c20000, 0x0000bdff, 0x10e20000,
- 0x0000c5ff, 0x18000000, 0x0000cdff, 0x18200000,
- 0x0000d5ff, 0x18400000, 0x0000deff, 0x18610000,
- 0x0000e6ff, 0x18810000, 0x0000eeff, 0x18a10000,
- 0x0000f6ff, 0x18c20000, 0x0000ffff, 0x18e20000,
- 0x000400ff, 0x20000000, 0x000408ff, 0x20200000,
- 0x000410ff, 0x20400000, 0x000418ff, 0x20610000,
- 0x000420ff, 0x20810000, 0x000429ff, 0x20a10000,
- 0x000431ff, 0x20c20000, 0x000439ff, 0x20e20000,
- 0x000441ff, 0x29000000, 0x00044aff, 0x29200000,
- 0x000452ff, 0x29400000, 0x00045aff, 0x29610000,
- 0x000462ff, 0x29810000, 0x00046aff, 0x29a10000,
- 0x000473ff, 0x29c20000, 0x00047bff, 0x29e20000,
- 0x000483ff, 0x31000000, 0x00048bff, 0x31200000,
- 0x000494ff, 0x31400000, 0x00049cff, 0x31610000,
- 0x0004a4ff, 0x31810000, 0x0004acff, 0x31a10000,
- 0x0004b4ff, 0x31c20000, 0x0004bdff, 0x31e20000,
- 0x0004c5ff, 0x39000000, 0x0004cdff, 0x39200000,
- 0x0004d5ff, 0x39400000, 0x0004deff, 0x39610000,
- 0x0004e6ff, 0x39810000, 0x0004eeff, 0x39a10000,
- 0x0004f6ff, 0x39c20000, 0x0004ffff, 0x39e20000,
- 0x000800ff, 0x41000000, 0x000808ff, 0x41200000,
- 0x000810ff, 0x41400000, 0x000818ff, 0x41610000,
- 0x000820ff, 0x41810000, 0x000829ff, 0x41a10000,
- 0x000831ff, 0x41c20000, 0x000839ff, 0x41e20000,
- 0x000841ff, 0x4a000000, 0x00084aff, 0x4a200000,
- 0x000852ff, 0x4a400000, 0x00085aff, 0x4a610000,
- 0x000862ff, 0x4a810000, 0x00086aff, 0x4aa10000,
- 0x000873ff, 0x4ac20000, 0x00087bff, 0x4ae20000,
- 0x000883ff, 0x52000000, 0x00088bff, 0x52200000,
- 0x000894ff, 0x52400000, 0x00089cff, 0x52610000,
- 0x0008a4ff, 0x52810000, 0x0008acff, 0x52a10000,
- 0x0008b4ff, 0x52c20000, 0x0008bdff, 0x52e20000,
- 0x0008c5ff, 0x5a000000, 0x0008cdff, 0x5a200000,
- 0x0008d5ff, 0x5a400000, 0x0008deff, 0x5a610000,
- 0x0008e6ff, 0x5a810000, 0x0008eeff, 0x5aa10000,
- 0x0008f6ff, 0x5ac20000, 0x0008ffff, 0x5ae20000,
- 0x000c00ff, 0x62000000, 0x000c08ff, 0x62200000,
- 0x000c10ff, 0x62400000, 0x000c18ff, 0x62610000,
- 0x000c20ff, 0x62810000, 0x000c29ff, 0x62a10000,
- 0x000c31ff, 0x62c20000, 0x000c39ff, 0x62e20000,
- 0x000c41ff, 0x6a000000, 0x000c4aff, 0x6a200000,
- 0x000c52ff, 0x6a400000, 0x000c5aff, 0x6a610000,
- 0x000c62ff, 0x6a810000, 0x000c6aff, 0x6aa10000,
- 0x000c73ff, 0x6ac20000, 0x000c7bff, 0x6ae20000,
- 0x000c83ff, 0x73000000, 0x000c8bff, 0x73200000,
- 0x000c94ff, 0x73400000, 0x000c9cff, 0x73610000,
- 0x000ca4ff, 0x73810000, 0x000cacff, 0x73a10000,
- 0x000cb4ff, 0x73c20000, 0x000cbdff, 0x73e20000,
- 0x000cc5ff, 0x7b000000, 0x000ccdff, 0x7b200000,
- 0x000cd5ff, 0x7b400000, 0x000cdeff, 0x7b610000,
- 0x000ce6ff, 0x7b810000, 0x000ceeff, 0x7ba10000,
- 0x000cf6ff, 0x7bc20000, 0x000cffff, 0x7be20000,
- 0x001000ff, 0x83000000, 0x001008ff, 0x83200000,
- 0x001010ff, 0x83400000, 0x001018ff, 0x83610000,
- 0x001020ff, 0x83810000, 0x001029ff, 0x83a10000,
- 0x001031ff, 0x83c20000, 0x001039ff, 0x83e20000,
- 0x001041ff, 0x8b000000, 0x00104aff, 0x8b200000,
- 0x001052ff, 0x8b400000, 0x00105aff, 0x8b610000,
- 0x001062ff, 0x8b810000, 0x00106aff, 0x8ba10000,
- 0x001073ff, 0x8bc20000, 0x00107bff, 0x8be20000,
- 0x001083ff, 0x94000000, 0x00108bff, 0x94200000,
- 0x001094ff, 0x94400000, 0x00109cff, 0x94610000,
- 0x0010a4ff, 0x94810000, 0x0010acff, 0x94a10000,
- 0x0010b4ff, 0x94c20000, 0x0010bdff, 0x94e20000,
- 0x0010c5ff, 0x9c000000, 0x0010cdff, 0x9c200000,
- 0x0010d5ff, 0x9c400000, 0x0010deff, 0x9c610000,
- 0x0010e6ff, 0x9c810000, 0x0010eeff, 0x9ca10000,
- 0x0010f6ff, 0x9cc20000, 0x0010ffff, 0x9ce20000,
- 0x001400ff, 0xa4000000, 0x001408ff, 0xa4200000,
- 0x001410ff, 0xa4400000, 0x001418ff, 0xa4610000,
- 0x001420ff, 0xa4810000, 0x001429ff, 0xa4a10000,
- 0x001431ff, 0xa4c20000, 0x001439ff, 0xa4e20000,
- 0x001441ff, 0xac000000, 0x00144aff, 0xac200000,
- 0x001452ff, 0xac400000, 0x00145aff, 0xac610000,
- 0x001462ff, 0xac810000, 0x00146aff, 0xaca10000,
- 0x001473ff, 0xacc20000, 0x00147bff, 0xace20000,
- 0x001483ff, 0xb4000000, 0x00148bff, 0xb4200000,
- 0x001494ff, 0xb4400000, 0x00149cff, 0xb4610000,
- 0x0014a4ff, 0xb4810000, 0x0014acff, 0xb4a10000,
- 0x0014b4ff, 0xb4c20000, 0x0014bdff, 0xb4e20000,
- 0x0014c5ff, 0xbd000000, 0x0014cdff, 0xbd200000,
- 0x0014d5ff, 0xbd400000, 0x0014deff, 0xbd610000,
- 0x0014e6ff, 0xbd810000, 0x0014eeff, 0xbda10000,
- 0x0014f6ff, 0xbdc20000, 0x0014ffff, 0xbde20000,
- 0x001800ff, 0xc5000000, 0x001808ff, 0xc5200000,
- 0x001810ff, 0xc5400000, 0x001818ff, 0xc5610000,
- 0x001820ff, 0xc5810000, 0x001829ff, 0xc5a10000,
- 0x001831ff, 0xc5c20000, 0x001839ff, 0xc5e20000,
- 0x001841ff, 0xcd000000, 0x00184aff, 0xcd200000,
- 0x001852ff, 0xcd400000, 0x00185aff, 0xcd610000,
- 0x001862ff, 0xcd810000, 0x00186aff, 0xcda10000,
- 0x001873ff, 0xcdc20000, 0x00187bff, 0xcde20000,
- 0x001883ff, 0xd5000000, 0x00188bff, 0xd5200000,
- 0x001894ff, 0xd5400000, 0x00189cff, 0xd5610000,
- 0x0018a4ff, 0xd5810000, 0x0018acff, 0xd5a10000,
- 0x0018b4ff, 0xd5c20000, 0x0018bdff, 0xd5e20000,
- 0x0018c5ff, 0xde000000, 0x0018cdff, 0xde200000,
- 0x0018d5ff, 0xde400000, 0x0018deff, 0xde610000,
- 0x0018e6ff, 0xde810000, 0x0018eeff, 0xdea10000,
- 0x0018f6ff, 0xdec20000, 0x0018ffff, 0xdee20000,
- 0x001c00ff, 0xe6000000, 0x001c08ff, 0xe6200000,
- 0x001c10ff, 0xe6400000, 0x001c18ff, 0xe6610000,
- 0x001c20ff, 0xe6810000, 0x001c29ff, 0xe6a10000,
- 0x001c31ff, 0xe6c20000, 0x001c39ff, 0xe6e20000,
- 0x001c41ff, 0xee000000, 0x001c4aff, 0xee200000,
- 0x001c52ff, 0xee400000, 0x001c5aff, 0xee610000,
- 0x001c62ff, 0xee810000, 0x001c6aff, 0xeea10000,
- 0x001c73ff, 0xeec20000, 0x001c7bff, 0xeee20000,
- 0x001c83ff, 0xf6000000, 0x001c8bff, 0xf6200000,
- 0x001c94ff, 0xf6400000, 0x001c9cff, 0xf6610000,
- 0x001ca4ff, 0xf6810000, 0x001cacff, 0xf6a10000,
- 0x001cb4ff, 0xf6c20000, 0x001cbdff, 0xf6e20000,
- 0x001cc5ff, 0xff000000, 0x001ccdff, 0xff200000,
- 0x001cd5ff, 0xff400000, 0x001cdeff, 0xff610000,
- 0x001ce6ff, 0xff810000, 0x001ceeff, 0xffa10000,
- 0x001cf6ff, 0xffc20000, 0x001cffff, 0xffe20000,
+// Special optimized blit for RGB565 -> RGBA8888
+
+static const Uint32 RGB565_RGBA8888_LUT_R[32] = {
+ 0x00000000, 0x08000000, 0x10000000, 0x19000000,
+ 0x21000000, 0x29000000, 0x31000000, 0x3a000000,
+ 0x42000000, 0x4a000000, 0x52000000, 0x5a000000,
+ 0x63000000, 0x6b000000, 0x73000000, 0x7b000000,
+ 0x84000000, 0x8c000000, 0x94000000, 0x9c000000,
+ 0xa5000000, 0xad000000, 0xb5000000, 0xbd000000,
+ 0xc5000000, 0xce000000, 0xd6000000, 0xde000000,
+ 0xe6000000, 0xef000000, 0xf7000000, 0xff000000
+};
+
+static const Uint32 RGB565_RGBA8888_LUT_G[64] = {
+ 0x00000000, 0x00040000, 0x00080000, 0x000c0000,
+ 0x00100000, 0x00140000, 0x00180000, 0x001c0000,
+ 0x00200000, 0x00240000, 0x00280000, 0x002d0000,
+ 0x00310000, 0x00350000, 0x00390000, 0x003d0000,
+ 0x00410000, 0x00450000, 0x00490000, 0x004d0000,
+ 0x00510000, 0x00550000, 0x00590000, 0x005d0000,
+ 0x00610000, 0x00650000, 0x00690000, 0x006d0000,
+ 0x00710000, 0x00750000, 0x00790000, 0x007d0000,
+ 0x00820000, 0x00860000, 0x008a0000, 0x008e0000,
+ 0x00920000, 0x00960000, 0x009a0000, 0x009e0000,
+ 0x00a20000, 0x00a60000, 0x00aa0000, 0x00ae0000,
+ 0x00b20000, 0x00b60000, 0x00ba0000, 0x00be0000,
+ 0x00c20000, 0x00c60000, 0x00ca0000, 0x00ce0000,
+ 0x00d20000, 0x00d70000, 0x00db0000, 0x00df0000,
+ 0x00e30000, 0x00e70000, 0x00eb0000, 0x00ef0000,
+ 0x00f30000, 0x00f70000, 0x00fb0000, 0x00ff0000
+};
+
+static const Uint32 RGB565_RGBA8888_LUT_B[32] = {
+ 0x00000000, 0x00000800, 0x00001000, 0x00001900,
+ 0x00002100, 0x00002900, 0x00003100, 0x00003a00,
+ 0x0000420
(Patch may be truncated, please check the link at the top of this post.)