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feat: add gl EXT handing for mipmap

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- comes from gl1.4
- new defines
- expand glTexEnvi
This commit is contained in:
Hayden K 2019-04-17 14:29:50 -04:00
parent 83b61f3cfa
commit 11a8736198
2 changed files with 59 additions and 19 deletions
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63
GL/texture.c
View File

@ -402,18 +402,13 @@ void APIENTRY glBindTexture(GLenum target, GLuint texture) {
void APIENTRY glTexEnvi(GLenum target, GLenum pname, GLint param) {
TRACE();
GLint target_values [] = {GL_TEXTURE_ENV, 0};
GLint pname_values [] = {GL_TEXTURE_ENV_MODE, 0};
GLint param_values [] = {GL_MODULATE, GL_DECAL, GL_REPLACE, 0};
GLubyte failures = 0;
GLint target_values [] = {GL_TEXTURE_ENV, GL_TEXTURE_FILTER_CONTROL_EXT, 0};
failures += _glCheckValidEnum(target, target_values, __func__);
failures += _glCheckValidEnum(pname, pname_values, __func__);
failures += _glCheckValidEnum(param, param_values, __func__);
TextureObject* active = TEXTURE_UNITS[ACTIVE_TEXTURE];
if(!active) {
return;
}
@ -421,20 +416,49 @@ void APIENTRY glTexEnvi(GLenum target, GLenum pname, GLint param) {
if(failures) {
return;
}
switch(target){
case GL_TEXTURE_ENV:
{
GLint pname_values [] = {GL_TEXTURE_ENV_MODE, 0};
GLint param_values [] = {GL_MODULATE, GL_DECAL, GL_REPLACE, 0};
failures += _glCheckValidEnum(pname, pname_values, __func__);
failures += _glCheckValidEnum(param, param_values, __func__);
if(failures) {
return;
}
switch(param) {
case GL_MODULATE:
active->env = PVR_TXRENV_MODULATEALPHA;
break;
case GL_DECAL:
active->env = PVR_TXRENV_DECAL;
break;
case GL_REPLACE:
active->env = PVR_TXRENV_REPLACE;
break;
default:
break;
switch(param) {
case GL_MODULATE:
active->env = PVR_TXRENV_MODULATEALPHA;
break;
case GL_DECAL:
active->env = PVR_TXRENV_DECAL;
break;
case GL_REPLACE:
active->env = PVR_TXRENV_REPLACE;
break;
default:
break;
}
}
break;
case GL_TEXTURE_FILTER_CONTROL_EXT:
{
GLint pname_values [] = {GL_TEXTURE_LOD_BIAS_EXT, 0};
failures += _glCheckValidEnum(pname, pname_values, __func__);
failures += (param > GL_MAX_TEXTURE_LOD_BIAS_DEFAULT || param < -GL_MAX_TEXTURE_LOD_BIAS_DEFAULT);
if(failures) {
return;
}
active->mipmap_bias = (GL_MAX_TEXTURE_LOD_BIAS_DEFAULT+1)+param; // bring to 1-15 inclusive
}
break;
default:
break;
}
}
void APIENTRY glCompressedTexImage2DARB(GLenum target,
@ -916,6 +940,7 @@ void APIENTRY glTexImage2D(GLenum target, GLint level, GLint internalFormat,
active->data = NULL;
active->mipmap = 0;
active->mipmapCount = 0;
active->mipmap_bias = GL_KOS_INTERNAL_DEFAULT_MIPMAP_LOD_BIAS; // in the scale of -8 - 8 moved to 1-15, -4 = 4
active->dataStride = 0;
}
}

15
include/glext.h
View File

@ -190,6 +190,21 @@ GLAPI void APIENTRY glCompressedTexImage2DARB(GLenum target,
#define glGenerateMipmap glGenerateMipmapEXT
#define glCompressedTexImage2D glCompressedTexImage2DARB
#ifndef GL_VERSION_1_4
#define GL_VERSION_1_4 1
#define GL_MAX_TEXTURE_LOD_BIAS 0x84FD
#define GL_TEXTURE_LOD_BIAS 0x8501
#define GL_MAX_TEXTURE_LOD_BIAS_DEFAULT 7
#define GL_KOS_INTERNAL_DEFAULT_MIPMAP_LOD_BIAS -4
#endif
#ifndef GL_EXT_texture_lod_bias
#define GL_EXT_texture_lod_bias 1
#define GL_MAX_TEXTURE_LOD_BIAS_EXT 0x84FD
#define GL_TEXTURE_FILTER_CONTROL_EXT 0x8500
#define GL_TEXTURE_LOD_BIAS_EXT 0x8501
#endif /* GL_EXT_texture_lod_bias */
__END_DECLS
#endif /* !__GL_GLEXT_H */