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Fix garbage at edges of conchar characters.

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Move the texture coordinates in 1/4 of a pixel. To avoid unnecessary
calculations, pre-caclulate the character cell texture coordinates and
blast them into the the texture coordinate array.
This commit is contained in:
Bill Currie 2010-12-11 12:09:30 +09:00
parent 8919aec663
commit 774f049646
1 changed files with 43 additions and 17 deletions
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60
libs/video/renderer/gl/gl_draw.c
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@ -28,8 +28,7 @@
# include "config.h"
#endif
static __attribute__ ((used)) const char rcsid[] =
"$Id$";
static __attribute__ ((used)) const char rcsid[] = "$Id$";
#ifdef HAVE_STRING_H
# include <string.h>
@ -66,6 +65,16 @@ static __attribute__ ((used)) const char rcsid[] =
#include "sbar.h"
#include "varrays.h"
#define CELL_SIZE (1.0 / 16.0) // conchars is 16x16
#define CELL_INSET (1.0 / 4.0) // of a pixel
typedef struct {
float tlx, tly;
float trx, try;
float brx, bry;
float blx, bly;
} cc_cell_t;
byte *draw_chars; // 8*8 graphic characters
int tVAsize;
@ -76,6 +85,7 @@ float *textCoords, *tC;
qpic_t *draw_backtile;
static cc_cell_t char_cells[256];
static int translate_texture;
static int char_texture;
static int cs_texture; // crosshair texturea
@ -326,6 +336,7 @@ Draw_Init (void)
int i;
tex_t *image;
byte *cs_tmp_data;
float width, height;
Cmd_AddCommand ("gl_texturemode", &GL_TextureMode_f,
"Texture mipmap quality.");
@ -346,6 +357,8 @@ Draw_Init (void)
char_texture = GL_LoadTexture ("charset", image->width,
image->height, image->data, false,
true, 4);
width = image->width;
height = image->height;
} else {
draw_chars = W_GetLumpName ("conchars");
for (i = 0; i < 256 * 64; i++)
@ -354,6 +367,25 @@ Draw_Init (void)
char_texture = GL_LoadTexture ("charset", 128, 128, draw_chars, false,
true, 1);
width = 128;
height = 128;
}
// initialize the character cell texture coordinates.
for (i = 0; i < 256; i++) {
float fcol, frow;
fcol = (i & 15) * CELL_SIZE;
frow = (i >> 4) * CELL_SIZE;
char_cells[i].tlx = fcol + CELL_INSET / width;
char_cells[i].tly = frow + CELL_INSET / height;
char_cells[i].trx = fcol - CELL_INSET / width + CELL_SIZE;
char_cells[i].try = frow + CELL_INSET / height;
char_cells[i].brx = fcol - CELL_INSET / width + CELL_SIZE;
char_cells[i].bry = frow - CELL_INSET / height + CELL_SIZE;
char_cells[i].blx = fcol + CELL_INSET / width;
char_cells[i].bly = frow - CELL_INSET / height + CELL_SIZE;
}
// re-arrange the cs_data bytes so they're layed out properly for
@ -388,8 +420,6 @@ Draw_Init (void)
Draw_InitText ();
}
#define CELL_SIZE 0.0625
static inline void
flush_text (void)
{
@ -403,11 +433,7 @@ flush_text (void)
static inline void
queue_character (float x, float y, int chr)
{
float frow, fcol;
frow = (chr >> 4) * CELL_SIZE;
fcol = (chr & 15) * CELL_SIZE;
float *coord = &char_cells[chr & 255].tlx;
*tV++ = x;
*tV++ = y;
*tV++ = x + 8.0;
@ -416,14 +442,14 @@ queue_character (float x, float y, int chr)
*tV++ = y + 8.0;
*tV++ = x;
*tV++ = y + 8.0;
*tC++ = fcol;
*tC++ = frow;
*tC++ = fcol + CELL_SIZE;
*tC++ = frow;
*tC++ = fcol + CELL_SIZE;
*tC++ = frow + CELL_SIZE;
*tC++ = fcol;
*tC++ = frow + CELL_SIZE;
*tC++ = *coord++;
*tC++ = *coord++;
*tC++ = *coord++;
*tC++ = *coord++;
*tC++ = *coord++;
*tC++ = *coord++;
*tC++ = *coord++;
*tC++ = *coord++;
}
static inline void