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Cache font rendering. Major overhead reduction.

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This commit is contained in:
Themaister 2011-10-07 17:58:22 +02:00
parent db71a5cdba
commit fa26f6a10c
1 changed files with 27 additions and 15 deletions
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42
gfx/gl.c
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@ -34,6 +34,7 @@
#include "gl_common.h"
#include "gfx_common.h"
#include "sdlwrap.h"
#include "strl.h"
#define NO_SDL_GLEXT
#include "SDL.h"
@ -174,6 +175,8 @@ typedef struct gl
GLuint font_tex;
int font_tex_w, font_tex_h;
void *font_tex_empty_buf;
char font_last_msg[256];
int font_last_width, font_last_height;
#endif
} gl_t;
@ -717,12 +720,13 @@ static void blit_fonts(gl_t *gl, const struct font_output *head, const struct fo
}
}
static void calculate_font_coords(gl_t *gl, const struct font_rect *geom, GLfloat font_vertex[8], GLfloat font_tex_coords[8])
static void calculate_font_coords(gl_t *gl,
GLfloat font_vertex[8], GLfloat font_tex_coords[8])
{
GLfloat lx = g_settings.video.msg_pos_x;
GLfloat hx = (GLfloat)geom->width / gl->vp_width + lx;
GLfloat hx = (GLfloat)gl->font_last_width / gl->vp_width + lx;
GLfloat ly = g_settings.video.msg_pos_y;
GLfloat hy = (GLfloat)geom->height / gl->vp_height + ly;
GLfloat hy = (GLfloat)gl->font_last_height / gl->vp_height + ly;
font_vertex[0] = lx;
font_vertex[1] = ly;
@ -734,8 +738,8 @@ static void calculate_font_coords(gl_t *gl, const struct font_rect *geom, GLfloa
font_vertex[7] = ly;
lx = 0.0f;
hx = (GLfloat)geom->width / gl->font_tex_w;
ly = 1.0f - (GLfloat)geom->height / gl->font_tex_h;
hx = (GLfloat)gl->font_last_width / gl->font_tex_w;
ly = 1.0f - (GLfloat)gl->font_last_height / gl->font_tex_h;
hy = 1.0f;
font_tex_coords[0] = lx;
@ -770,22 +774,30 @@ static void gl_render_msg(gl_t *gl, const char *msg)
g_settings.video.msg_color_b, 1);
struct font_output_list out;
font_renderer_msg(gl->font, msg, &out);
struct font_output *head = out.head;
struct font_rect geom;
calculate_msg_geometry(head, &geom);
adjust_power_of_two(gl, &geom);
blit_fonts(gl, head, &geom);
calculate_font_coords(gl, &geom, font_vertex, font_tex_coords);
// If we get the same message, there's obviously no need to render fonts again ...
if (strcmp(gl->font_last_msg, msg) != 0)
{
font_renderer_msg(gl->font, msg, &out);
struct font_output *head = out.head;
font_renderer_free_output(&out);
struct font_rect geom;
calculate_msg_geometry(head, &geom);
adjust_power_of_two(gl, &geom);
blit_fonts(gl, head, &geom);
font_renderer_free_output(&out);
strlcpy(gl->font_last_msg, msg, sizeof(gl->font_last_msg));
gl->font_last_width = geom.width;
gl->font_last_height = geom.height;
}
calculate_font_coords(gl, font_vertex, font_tex_coords);
glDrawArrays(GL_QUADS, 0, 4);
glColor4f(1, 1, 1, 1);
// Go back to old rendering path.
glColor4f(1, 1, 1, 1);
glTexCoordPointer(2, GL_FLOAT, 2 * sizeof(GLfloat), gl->tex_coords);
glVertexPointer(2, GL_FLOAT, 2 * sizeof(GLfloat), vertexes_flipped);
glBindTexture(GL_TEXTURE_2D, gl->texture[gl->tex_index]);