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Use red channel for fog table in GL but continue using alpha channel in 

GLES. Alpha channel is supported only in GL compat mode, not core.
This commit is contained in:
Flyinghead 2018-07-14 10:48:16 +02:00
parent 2d3fd59e04
commit bb2d860902
1 changed files with 8 additions and 2 deletions
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10
core/rend/gles/gles.cpp
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@ -178,10 +178,15 @@ lowp float fog_mode2(highp float invW) \n\
#ifndef GLES
#define FRAGCOL "FragColor"
#define TEXLOOKUP "texture"
#undef vary
#define vary "in"
#define FOG_CHANNEL "r"
#define FOG_IMG_TYPE GL_RED
#else
#define FRAGCOL "gl_FragColor"
#define TEXLOOKUP "texture2D"
#define FOG_CHANNEL "a"
#define FOG_IMG_TYPE GL_ALPHA
#endif
@ -235,7 +240,7 @@ lowp float fog_mode2(highp float w) \n\
highp float m = z * 16.0 / pow(2.0, exp) - 16.0; \n\
float idx = floor(m) + exp * 16.0 + 0.5; \n\
vec4 fog_coef = " TEXLOOKUP "(fog_table, vec2(idx / 128.0, 0.75 - (m - floor(m)) / 2.0)); \n\
return fog_coef.a; \n\
return fog_coef." FOG_CHANNEL "; \n\
} \n\
void main() \n\
{ \n\
@ -1004,7 +1009,8 @@ void UpdateFogTexture(u8 *fog_table)
temp_tex_buffer[i] = fog_table[i * 4];
temp_tex_buffer[i + 128] = fog_table[i * 4 + 1];
}
glTexImage2D(GL_TEXTURE_2D, 0, GL_ALPHA, 128, 2, 0, GL_ALPHA, GL_UNSIGNED_BYTE, temp_tex_buffer);
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
glTexImage2D(GL_TEXTURE_2D, 0, FOG_IMG_TYPE, 128, 2, 0, FOG_IMG_TYPE, GL_UNSIGNED_BYTE, temp_tex_buffer);
glCheck();
glActiveTexture(GL_TEXTURE0);