diff options
| author | bobo1on1 <bobo1on1@svn> | 2010-07-10 19:31:35 +0000 |
|---|---|---|
| committer | bobo1on1 <bobo1on1@svn> | 2010-07-10 19:31:35 +0000 |
| commit | c84cddf230b4b245f92fad6b07dad99a56c31b06 (patch) | |
| tree | 50f34db200b4217288284648eb7ec6956c6f5e6b /system/shaders | |
| parent | 652da10c25d932b110f94fdc95c9262d20e65b4b (diff) | |
added: non-linear stretch for GL_ARB_texture_rectangle
fixed: non-linear stretch doesn't work on POT so don't allow it
git-svn-id: https://xbmc.svn.sourceforge.net/svnroot/xbmc/trunk@31699 568bbfeb-2a22-0410-94d2-cc84cf5bfa90
Diffstat (limited to 'system/shaders')
| -rw-r--r-- | system/shaders/yuv2rgb_basic.glsl | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/system/shaders/yuv2rgb_basic.glsl b/system/shaders/yuv2rgb_basic.glsl index 138ffd89bd..4df222b0f6 100644 --- a/system/shaders/yuv2rgb_basic.glsl +++ b/system/shaders/yuv2rgb_basic.glsl @@ -23,8 +23,13 @@ vec2 stretch(vec2 pos) // our transform should map [0..1] to itself, with f(0) = 0, f(1) = 1, f(0.5) = 0.5, and f'(0.5) = b. // a simple curve to do this is g(x) = b(x-0.5) + (1-b)2^(n-1)(x-0.5)^n + 0.5 // where the power preserves sign. n = 2 is the simplest non-linear case (required when b != 1) - float x = pos.x - 0.5; - return vec2(mix(2.0 * x * abs(x), x, m_stretch) + 0.5, pos.y); + #if(XBMC_texture_rectangle) + float x = (pos.x * m_step.x) - 0.5; + return vec2((mix(2.0 * x * abs(x), x, m_stretch) + 0.5) / m_step.x, pos.y); + #else + float x = pos.x - 0.5; + return vec2(mix(2.0 * x * abs(x), x, m_stretch) + 0.5, pos.y); + #endif #else return pos; #endif |