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Fix scale for mip map tiles (GLES2).

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s2s 2021-11-07 11:02:51 +01:00 committed by Sergey Lipskiy
parent cc42888c1b
commit ad091be1cf
1 changed files with 10 additions and 2 deletions
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12
src/Graphics/OpenGLContext/GLSL/glsl_CombinerProgramBuilderAccurate.cpp
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@ -621,14 +621,22 @@ public:
" lowp vec4 c11 = texture2D(tex, (tcData[3] + 0.5)/texSize); \n"
;
static const std::string strReadTex1 =
"mediump float get_high4(in float byte) { \n"
" return floor(byte/16.0); \n"
"} \n"
"mediump float get_low4(in float byte) { \n"
" return byte - 16.0*floor(byte/16.0); \n"
"} \n"
"lowp vec4 TextureMipMap1(in sampler2D tex, in highp vec2 tcData[5], in lowp float lod) \n"
"{ \n"
// Fetch from texture atlas
// First 8 texels contain info about tile size and offset, 1 texel per tile
" mediump vec2 texSize = uTextureSize[1]; \n"
" mediump vec2 texSize = uTextureSize[1]; \n"
" mediump vec4 texWdthAndOff0 = 255.0 * texture2D(tex, vec2(0.5, 0.5)/texSize); \n"
" mediump vec4 texWdthAndOff = 255.0 * texture2D(tex, vec2(lod + 0.5, 0.5)/texSize); \n"
" mediump vec2 lod_scale = texWdthAndOff.ba / texWdthAndOff0.ba; \n"
" mediump float lod_scales = pow(2.0, get_high4(texWdthAndOff0.a) - get_high4(texWdthAndOff.a)); \n"
" mediump float lod_scalet = pow(2.0, get_low4(texWdthAndOff0.a) - get_low4(texWdthAndOff.a)); \n"
" mediump vec2 lod_scale = vec2(lod_scales, lod_scalet); \n"
" mediump float offset = texWdthAndOff.r + texWdthAndOff.g * 256.0; \n"
" mediump float width = texWdthAndOff.b; \n"
" mediump vec2 Coords00 = floor(tcData[0] * lod_scale); \n"