Konrad Rzepecki : wined3d: Implement WINED3DFMT_YUY2 to WINED3DFMT_B5G6R5_UNORM conversion function.
Alexandre Julliard
julliard at winehq.org
Tue Mar 29 11:43:02 CDT 2011
Module: wine
Branch: master
Commit: e1524883c10b63d05a82624eca7fb775c69e3cd3
URL: http://source.winehq.org/git/wine.git/?a=commit;h=e1524883c10b63d05a82624eca7fb775c69e3cd3
Author: Konrad Rzepecki <hannibal at astral.lodz.pl>
Date: Sun Mar 20 11:59:46 2011 +0100
wined3d: Implement WINED3DFMT_YUY2 to WINED3DFMT_B5G6R5_UNORM conversion function.
---
dlls/wined3d/surface_base.c | 44 +++++++++++++++++++++++++++++++++++++++++++
1 files changed, 44 insertions(+), 0 deletions(-)
diff --git a/dlls/wined3d/surface_base.c b/dlls/wined3d/surface_base.c
index 74fa196..4239f69 100644
--- a/dlls/wined3d/surface_base.c
+++ b/dlls/wined3d/surface_base.c
@@ -782,6 +782,49 @@ static void convert_yuy2_x8r8g8b8(const BYTE *src, BYTE *dst,
}
}
+static void convert_yuy2_r5g6b5(const BYTE *src, BYTE *dst,
+ DWORD pitch_in, DWORD pitch_out, unsigned int w, unsigned int h)
+{
+ unsigned int x, y;
+ int c2, d, e, r2 = 0, g2 = 0, b2 = 0;
+
+ TRACE("Converting %ux%u pixels, pitches %u %u\n", w, h, pitch_in, pitch_out);
+
+ for (y = 0; y < h; ++y)
+ {
+ const BYTE *src_line = src + y * pitch_in;
+ WORD *dst_line = (WORD *)(dst + y * pitch_out);
+ for (x = 0; x < w; ++x)
+ {
+ /* YUV to RGB conversion formulas from http://en.wikipedia.org/wiki/YUV:
+ * C = Y - 16; D = U - 128; E = V - 128;
+ * R = cliptobyte((298 * C + 409 * E + 128) >> 8);
+ * G = cliptobyte((298 * C - 100 * D - 208 * E + 128) >> 8);
+ * B = cliptobyte((298 * C + 516 * D + 128) >> 8);
+ * Two adjacent YUY2 pixels are stored as four bytes: Y0 U Y1 V .
+ * U and V are shared between the pixels.
+ */
+ if (!(x & 1)) /* for every even pixel, read new U and V */
+ {
+ d = (int) src_line[1] - 128;
+ e = (int) src_line[3] - 128;
+ r2 = 409 * e + 128;
+ g2 = - 100 * d - 208 * e + 128;
+ b2 = 516 * d + 128;
+ }
+ c2 = 298 * ((int) src_line[0] - 16);
+ dst_line[x] = (cliptobyte((c2 + r2) >> 8) >> 3) << 11 /* red */
+ | (cliptobyte((c2 + g2) >> 8) >> 2) << 5 /* green */
+ | (cliptobyte((c2 + b2) >> 8) >> 3); /* blue */
+ /* Scale RGB values to 0..255 range,
+ * then clip them if still not in range (may be negative),
+ * then shift them within DWORD if necessary.
+ */
+ src_line += 2;
+ }
+ }
+}
+
struct d3dfmt_convertor_desc
{
enum wined3d_format_id from, to;
@@ -794,6 +837,7 @@ static const struct d3dfmt_convertor_desc convertors[] =
{WINED3DFMT_B5G6R5_UNORM, WINED3DFMT_B8G8R8X8_UNORM, convert_r5g6b5_x8r8g8b8},
{WINED3DFMT_B8G8R8A8_UNORM, WINED3DFMT_B8G8R8X8_UNORM, convert_a8r8g8b8_x8r8g8b8},
{WINED3DFMT_YUY2, WINED3DFMT_B8G8R8X8_UNORM, convert_yuy2_x8r8g8b8},
+ {WINED3DFMT_YUY2, WINED3DFMT_B5G6R5_UNORM, convert_yuy2_r5g6b5},
};
static inline const struct d3dfmt_convertor_desc *find_convertor(enum wined3d_format_id from, enum wined3d_format_id to)
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