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Allow any NxN or 2NxN sky texture for glsl.

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Maps that specify a skybox often use a fake sky texture, sometimes 16x16.
Having a hardcoded requiredment of 256x128 is a tad inappropriate.
This commit is contained in:
Bill Currie 2012-09-05 14:02:44 +09:00
parent d6a1daaf30
commit 6ba6959205
1 changed files with 36 additions and 12 deletions
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48
libs/models/brush/glsl_model_brush.c
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@ -66,6 +66,8 @@ glsl_brush_clear (model_t *m)
// NOTE: some maps (eg e1m2) have empty texture slots
if (m->textures[i] && m->textures[i]->gl_texturenum) {
GLSL_ReleaseTexture (m->textures[i]->gl_texturenum);
GLSL_ReleaseTexture (m->textures[i]->sky_tex[0]);
GLSL_ReleaseTexture (m->textures[i]->sky_tex[1]);
m->textures[i]->gl_texturenum = 0;
}
}
@ -77,6 +79,18 @@ glsl_brush_clear (model_t *m)
}
}
static int
load_skytex (texture_t *tx, byte *data)
{
int tex;
tex = GLSL_LoadQuakeTexture (tx->name, tx->height, tx->height, data);
// GLSL_LoadQuakeTexture () leaves the texture bound
qfeglTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
qfeglTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
return tex;
}
void
glsl_Mod_ProcessTexture (texture_t *tx)
{
@ -85,22 +99,32 @@ glsl_Mod_ProcessTexture (texture_t *tx)
// wrapping on both sky layers.
byte *data;
byte *tx_data;
int tx_w, tx_h;
int i, j;
if (tx->width != 256 || tx->height != 128)
Sys_Error ("Mod_ProcessTexture: invalid sky texture: %dx%d\n",
tx->width, tx->height);
data = alloca (128 * 128);
tx_w = tx->width;
tx_h = tx->height;
tx_data = (byte *)tx + tx->offsets[0];
for (i = 0; i < 2; i++) {
for (j = 0; j < 128; j++)
memcpy (&data[j * 128], &tx_data[j * 256 + i * 128], 128);
tx->sky_tex[i] = GLSL_LoadQuakeTexture (tx->name, 128, 128, data);
// GLSL_LoadQuakeTexture () leaves the texture bound
qfeglTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
qfeglTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
if (tx_w == tx_h) {
// a square sky texture probably means it's black, but just in
// case some other magic is being done, duplicate the square to
// both sky layers.
tx->sky_tex[0] = load_skytex (tx, tx_data);
tx->sky_tex[1] = tx->sky_tex[0];
} else if (tx_w == 2 * tx_h) {
data = alloca (tx_h * tx_h);
for (i = 0; i < 2; i++) {
for (j = 0; j < tx_h; j++)
memcpy (&data[j * tx_h], &tx_data[j * tx_w + i * tx_h],
tx_h);
tx->sky_tex[i] = load_skytex (tx, data);
}
tx->gl_texturenum = 0;
} else {
Sys_Error ("Mod_ProcessTexture: invalid sky texture: %dx%d\n",
tx_w, tx_h);
}
tx->gl_texturenum = 0;
} else {
tx->gl_texturenum = GLSL_LoadQuakeMipTex (tx);
}