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Optimize a bit.

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This commit is contained in:
Themaister 2012-01-02 14:50:03 +01:00
parent 7d1ebdf94a
commit eeebc2d06b
1 changed files with 32 additions and 31 deletions
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63
wii/video.c
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@ -31,7 +31,7 @@ static unsigned g_filter;
struct
{
uint16_t data[512 * 512];
uint32_t data[512 * 256];
GXTexObj obj;
} static g_tex ATTRIBUTE_ALIGN(32);
@ -152,43 +152,44 @@ static void *wii_init(const video_info_t *video,
return (void*)-1;
}
static void update_texture(const uint16_t *src,
static void update_texture(const uint32_t *src,
unsigned width, unsigned height, unsigned pitch)
{
pitch >>= 1;
width &= ~3;
pitch >>= 2;
width &= ~15;
height &= ~3;
// Texture data is 4x4 tiled @ 16bpp.
uint16_t *dst = g_tex.data;
for (unsigned i = 0; i < height; i += 4, src += 4 * pitch)
#define BLIT_CHUNK(off) { \
tmp_dst[ 0 + off] = tmp_src[0]; \
tmp_dst[ 1 + off] = tmp_src[1]; \
tmp_dst[ 8 + off] = tmp_src[2]; \
tmp_dst[ 9 + off] = tmp_src[3]; \
tmp_dst[16 + off] = tmp_src[4]; \
tmp_dst[17 + off] = tmp_src[5]; \
tmp_dst[24 + off] = tmp_src[6]; \
tmp_dst[25 + off] = tmp_src[7]; }
#define BLIT_LINE(off) { \
const uint32_t *tmp_src = src; \
uint32_t *tmp_dst = dst; \
for (unsigned x = 0; x < width; x += 8, tmp_src += 8, tmp_dst += 32) \
BLIT_CHUNK(off) \
src += pitch; }
width >>= 1;
// Texture data is 4x4 tiled @ 15bpp (docs say it's RGB565, but apparently it's RGB555).
// Use 32-bit to transfer more data per cycle.
uint32_t *dst = g_tex.data;
for (unsigned i = 0; i < height; i += 4, dst += 4 * width)
{
for (unsigned x = 0; x < width; x += 4, dst += 16)
{
const uint16_t *tmp_src = src + x;
dst[ 0] = tmp_src[0];
dst[ 1] = tmp_src[1];
dst[ 2] = tmp_src[2];
dst[ 3] = tmp_src[3];
tmp_src += pitch;
dst[ 4] = tmp_src[0];
dst[ 5] = tmp_src[1];
dst[ 6] = tmp_src[2];
dst[ 7] = tmp_src[3];
tmp_src += pitch;
dst[ 8] = tmp_src[0];
dst[ 9] = tmp_src[1];
dst[10] = tmp_src[2];
dst[11] = tmp_src[3];
tmp_src += pitch;
dst[12] = tmp_src[0];
dst[13] = tmp_src[1];
dst[14] = tmp_src[2];
dst[15] = tmp_src[3];
}
BLIT_LINE(0)
BLIT_LINE(2)
BLIT_LINE(4)
BLIT_LINE(6)
}
init_texture(width, height);
init_texture(width << 1, height);
DCFlushRange(g_tex.data, sizeof(g_tex.data));
GX_InvalidateTexAll();
}