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[gl] Add a function to load a tex_t image

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In theory, it supports all the non-palette formats, but only luminance
and alpha (tex_l and tex_a) have been tested. Fixes the rather broken
glyph rendering.
This commit is contained in:
Bill Currie 2022-12-05 13:35:44 +09:00
parent b987414c1d
commit 022c49035f
3 changed files with 54 additions and 2 deletions
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2
include/QF/GL/qf_textures.h
View file

@ -41,10 +41,12 @@ extern int gl_filter_max;
extern qboolean gl_Anisotropy;
extern float gl_aniso;
extern GLuint gl_part_tex;
struct tex_s;
void GL_Upload8 (const byte *data, int width, int height, qboolean mipmap, qboolean alpha);
void GL_Upload8_EXT (const byte *data, int width, int height, qboolean mipmap, qboolean alpha);
int GL_LoadTexture (const char *identifier, int width, int height, const byte *data, qboolean mipmap, qboolean alpha, int bytesperpixel);
int GL_LoadTex (const char *identifier, int mips, struct tex_s *tex);
int GL_FindTexture (const char *identifier);
void GL_TextureMode_f (void);

12
libs/video/renderer/gl/gl_draw.c
View file

@ -1066,8 +1066,14 @@ gl_Draw_AddFont (struct rfont_s *rfont)
glfont_t *font = &gl_fonts.a[fontid];
font->font = rfont;
font->texid = GL_LoadTexture ("", rfont->scrap.width, rfont->scrap.height,
rfont->scrap_bitmap, 0, 1, 1);
tex_t tex = {
.width = rfont->scrap.width,
.height = rfont->scrap.height,
.format = tex_a,
.loaded = 1,
.data = rfont->scrap_bitmap,
};
font->texid = GL_LoadTex ("", 0, &tex);
return fontid;
}
@ -1090,6 +1096,7 @@ gl_render_glyph (uint32_t glyphid, int x, int y, void *_rgctx)
float v = rect->y;
float s = 1.0 / rfont->scrap.width;
float t = 1.0 / rfont->scrap.height;
qfglColor4ubv (rgctx->color);
qfglTexCoord2f (u * s, v * t);
qfglVertex2f (x, y);
qfglTexCoord2f ((u + w) * s, v * t);
@ -1126,4 +1133,5 @@ gl_Draw_FontString (int x, int y, int fontid, const char *str)
RText_DeleteShaper (shaper);
qfglEnd ();
qfglColor4ubv (color_white);
}

42
libs/video/renderer/gl/gl_textures.c
View file

@ -42,6 +42,7 @@
#include "QF/crc.h"
#include "QF/cvar.h"
#include "QF/draw.h"
#include "QF/image.h"
#include "QF/mathlib.h"
#include "QF/sys.h"
#include "QF/GL/defines.h"
@ -641,6 +642,47 @@ SetupTexture:
return glt->texnum;
}
int
GL_LoadTex (const char *identifier, int mips, tex_t *tex)
{
GLuint tnum;
qfglGenTextures (1, &tnum);
int format = GL_RGB;
switch (tex->format) {
case tex_l:
case tex_a:
format = tex->format;
break;
case tex_la:
format = GL_LUMINANCE_ALPHA;
break;
case tex_rgb:
format = GL_RGB;
break;
case tex_rgba:
format = GL_RGBA;
break;
default:
Sys_Error ("GL_CreateScrap: Invalid texture format");
}
qfglBindTexture (GL_TEXTURE_2D, tnum);
qfglTexImage2D (GL_TEXTURE_2D, 0, format, tex->width, tex->height,
0, format, GL_UNSIGNED_BYTE, tex->data);
qfglTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
qfglTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
if (mips) {
qfglTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
qfglTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
qfglGenerateMipmap (GL_TEXTURE_2D);
} else {
qfglTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
qfglTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
}
return tnum;
}
void
GL_ReleaseTexture (int tex)
{