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#include <allegro.h>
#include <alleggl.h>
/* Make it compile with Allegro 4.2.0, which is missing make_trans_font. */
#if ALLEGRO_VERSION == 4 && ALLEGRO_SUB_VERSION == 2 && ALLEGRO_WIP_VERSION == 0
static void make_trans_font(FONT *f) {(void)f;}
#endif
#define OPENGL_FORMATS 6
#define FONTS_COUNT 4
int main(void)
{
/* The fonts. */
FONT *allegro_font[OPENGL_FORMATS];
PALETTE pal[FONTS_COUNT];
FONT *allegrogl_font[FONTS_COUNT * OPENGL_FORMATS];
char const *font_file[] = {"a32.tga", "a24.tga", "a8.bmp", "a1.bmp"};
char const *font_name[] = {"32 bit", "24 bit", "8 bit", "1 bit"};
/* OpenGL texture formats to test. */
int opengl_format[] = {
GL_RGBA, GL_RGB, GL_ALPHA, GL_LUMINANCE,
GL_INTENSITY, GL_LUMINANCE_ALPHA};
char const *opengl_format_name[][2] = {
{"RGBA", ""}, {"RGB", ""}, {"ALPHA", ""}, {"LUMINANCE", ""},
{"INTENSITY", ""}, {"LUMINANCE", "_ALPHA"}
};
/* Make our window have just the right size. */
int w = 80 + OPENGL_FORMATS * 96;
int h = 32 + FONTS_COUNT * 80;
int x, y, i;
allegro_init();
install_timer();
install_allegro_gl();
allegro_gl_set(AGL_COLOR_DEPTH, 32);
allegro_gl_set(AGL_SUGGEST, AGL_COLOR_DEPTH);
set_gfx_mode(GFX_OPENGL_WINDOWED, w, h, 0, 0);
install_keyboard();
allegro_gl_set_allegro_mode();
/* Load the fonts. */
for (i = 0; i < FONTS_COUNT; i++)
{
allegro_font[i] = load_font(font_file[i], pal[i], NULL);
if (!allegro_font[i])
{
set_gfx_mode(GFX_TEXT, 0, 0, 0, 0);
allegro_message("Unable to load \"%s\".\n", font_file[i]);
return -1;
}
transpose_font(allegro_font[i], 'a' - ' ');
}
make_trans_font(allegro_font[0]);
set_trans_blender(0, 0, 0, 0);
/* Convert the fonts to all the format combination we want to test. */
for (i = 0; i < FONTS_COUNT * OPENGL_FORMATS; i++)
{
select_palette(pal[i % FONTS_COUNT]);
allegrogl_font[i] = allegro_gl_convert_allegro_font_ex(
allegro_font[i % FONTS_COUNT],
AGL_FONT_TYPE_TEXTURED, 1, opengl_format[i / FONTS_COUNT]);
}
while (!key[KEY_ESC])
{
int s = 16;
glClearColor(1, 1, 1, 1);
glClear(GL_COLOR_BUFFER_BIT);
/* Draw background pattern. */
for (y = 32; y < h; y += s)
{
for (x = 80; x < w; x += s)
{
int sx = (x / s) & 1;
int sy = (y / s) & 1;
float c = sx ^ sy;
glColor3f(0.2 + c * 0.6, 0.2 + c * 0.6, c);
glBegin(GL_QUADS);
glVertex2d(x, y);
glVertex2d(x + s, y);
glVertex2d(x + s, y + s);
glVertex2d(x, y + s);
glEnd();
}
}
glEnable(GL_TEXTURE_2D);
glEnable(GL_BLEND);
/* Draw left info text. */
for (y = 0; y < FONTS_COUNT; y++)
{
glBlendFunc(GL_ONE, GL_ZERO);
textprintf_ex(screen, font, 4, 32 + y * 80,
makecol(0, 0, 0), -1, "%s", font_name[y]);
}
/* Columns are texture formats, rows are font formats. */
i = 0;
for (x = 0; x < OPENGL_FORMATS; x++)
{
int j;
/* Draw top info text. */
glBlendFunc(GL_ONE, GL_ZERO);
for (j = 0; j < 2; j++)
textprintf_ex(screen, font, 80 + x * 96, 4 + 16 * j,
makecol(0, 0, 0), -1, "%s", opengl_format_name[x][j]);
/* Draw the example glyph for the current cell. */
for (y = 0; y < FONTS_COUNT; y++)
{
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
glTranslatef(80 + x * 96, 32 + y * 80, 0);
glScalef(1, -1, 1);
glColor4f(1, 1, 1, 1);
allegro_gl_printf_ex(allegrogl_font[i++], 0, 0, 0, "a");
glPopMatrix();
}
}
glDisable(GL_TEXTURE_2D);
glDisable(GL_BLEND);
allegro_gl_flip();
/* Update about 60 times / second. */
rest(1000 / 60);
}
return 0;
}
END_OF_MAIN()
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