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wined3d: Simplify shader_glsl_get_swizzle().

This commit is contained in:
H. Verbeet 2007-01-15 19:36:46 +01:00 committed by Alexandre Julliard
parent 48f82d3f5e
commit c6bccc9278
1 changed files with 6 additions and 11 deletions
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17
dlls/wined3d/glsl_shader.c
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@ -734,21 +734,16 @@ static void shader_glsl_get_swizzle(const DWORD param, BOOL fixup, DWORD mask, c
/* For registers of type WINED3DDECLTYPE_D3DCOLOR, data is stored as "bgra",
* but addressed as "rgba". To fix this we need to swap the register's x
* and z components. */
DWORD swizzle = (param & WINED3DSP_SWIZZLE_MASK) >> WINED3DSP_SWIZZLE_SHIFT;
const char *swizzle_chars = fixup ? "zyxw" : "xyzw";
char *ptr = swizzle_str;
/* swizzle bits fields: wwzzyyxx */
DWORD swizzle = (param & WINED3DSP_SWIZZLE_MASK) >> WINED3DSP_SWIZZLE_SHIFT;
DWORD swizzle_x = swizzle & 0x03;
DWORD swizzle_y = (swizzle >> 2) & 0x03;
DWORD swizzle_z = (swizzle >> 4) & 0x03;
DWORD swizzle_w = (swizzle >> 6) & 0x03;
*ptr++ = '.';
if (mask & WINED3DSP_WRITEMASK_0) *ptr++ = swizzle_chars[swizzle_x];
if (mask & WINED3DSP_WRITEMASK_1) *ptr++ = swizzle_chars[swizzle_y];
if (mask & WINED3DSP_WRITEMASK_2) *ptr++ = swizzle_chars[swizzle_z];
if (mask & WINED3DSP_WRITEMASK_3) *ptr++ = swizzle_chars[swizzle_w];
/* swizzle bits fields: wwzzyyxx */
if (mask & WINED3DSP_WRITEMASK_0) *ptr++ = swizzle_chars[swizzle & 0x03];
if (mask & WINED3DSP_WRITEMASK_1) *ptr++ = swizzle_chars[(swizzle >> 2) & 0x03];
if (mask & WINED3DSP_WRITEMASK_2) *ptr++ = swizzle_chars[(swizzle >> 4) & 0x03];
if (mask & WINED3DSP_WRITEMASK_3) *ptr++ = swizzle_chars[(swizzle >> 6) & 0x03];
*ptr = '\0';
}