Sandijs Ribaks : wined3d: Add surface conversion function from WINED3DFMT_YUY2 to WINED3DFMT_B8G8R8X8_UNORM .
Alexandre Julliard
julliard at winehq.org
Wed Mar 17 12:19:06 CDT 2010
Module: wine
Branch: master
Commit: e385748258bea127d4883a540611f9ee80e65d63
URL: http://source.winehq.org/git/wine.git/?a=commit;h=e385748258bea127d4883a540611f9ee80e65d63
Author: Sandijs Ribaks <spamdijs at inbox.lv>
Date: Tue Mar 16 16:09:06 2010 +0200
wined3d: Add surface conversion function from WINED3DFMT_YUY2 to WINED3DFMT_B8G8R8X8_UNORM.
---
dlls/wined3d/surface_base.c | 50 +++++++++++++++++++++++++++++++++++++++++++
1 files changed, 50 insertions(+), 0 deletions(-)
diff --git a/dlls/wined3d/surface_base.c b/dlls/wined3d/surface_base.c
index 33e3d3e..a372869 100644
--- a/dlls/wined3d/surface_base.c
+++ b/dlls/wined3d/surface_base.c
@@ -742,6 +742,55 @@ static void convert_a8r8g8b8_x8r8g8b8(const BYTE *src, BYTE *dst,
}
}
+static inline BYTE cliptobyte(int x)
+{
+ return (BYTE) ((x < 0) ? 0 : ((x > 255) ? 255 : x));
+}
+
+static void convert_yuy2_x8r8g8b8(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;
+ DWORD *dst_line = (DWORD *)(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] = 0xff000000
+ | cliptobyte((c2 + r2) >> 8) << 16 /* red */
+ | cliptobyte((c2 + g2) >> 8) << 8 /* green */
+ | cliptobyte((c2 + b2) >> 8); /* 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 {
WINED3DFORMAT from, to;
void (*convert)(const BYTE *src, BYTE *dst, DWORD pitch_in, DWORD pitch_out, unsigned int w, unsigned int h);
@@ -752,6 +801,7 @@ static const struct d3dfmt_convertor_desc convertors[] =
{WINED3DFMT_R32_FLOAT, WINED3DFMT_R16_FLOAT, convert_r32_float_r16_float},
{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},
};
static inline const struct d3dfmt_convertor_desc *find_convertor(WINED3DFORMAT from, WINED3DFORMAT to)
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