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fix: color is too bright

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Close #119
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rankun 2020-04-19 12:17:54 +08:00
commit 3544ec34d6
1 changed files with 7 additions and 1 deletions
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8
QtScrcpy/device/render/qyuvopenglwidget.cpp
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@ -61,15 +61,21 @@ static QString s_fragShader = R"(
{ {
vec3 yuv; vec3 yuv;
vec3 rgb; vec3 rgb;
// SDL2-2.0.10\src\render\opengl\SDL_shaders_gl.c BT709_SHADER_CONSTANTS
// SDL2 BT709_SHADER_CONSTANTS
// https://github.com/spurious/SDL-mirror/blob/4ddd4c445aa059bb127e101b74a8c5b59257fbe2/src/render/opengl/SDL_shaders_gl.c#L102
const vec3 Rcoeff = vec3(1.1644, 0.000, 1.7927); const vec3 Rcoeff = vec3(1.1644, 0.000, 1.7927);
const vec3 Gcoeff = vec3(1.1644, -0.2132, -0.5329); const vec3 Gcoeff = vec3(1.1644, -0.2132, -0.5329);
const vec3 Bcoeff = vec3(1.1644, 2.1124, 0.000); const vec3 Bcoeff = vec3(1.1644, 2.1124, 0.000);
// 根据指定的纹理textureY和坐标textureOut来采样 // 根据指定的纹理textureY和坐标textureOut来采样
yuv.x = texture2D(textureY, textureOut).r; yuv.x = texture2D(textureY, textureOut).r;
yuv.y = texture2D(textureU, textureOut).r - 0.5; yuv.y = texture2D(textureU, textureOut).r - 0.5;
yuv.z = texture2D(textureV, textureOut).r - 0.5; yuv.z = texture2D(textureV, textureOut).r - 0.5;
// 采样完转为rgb // 采样完转为rgb
// 减少一些亮度
yuv.x = yuv.x - 0.0625;
rgb.r = dot(yuv, Rcoeff); rgb.r = dot(yuv, Rcoeff);
rgb.g = dot(yuv, Gcoeff); rgb.g = dot(yuv, Gcoeff);
rgb.b = dot(yuv, Bcoeff); rgb.b = dot(yuv, Bcoeff);