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quakeforge/libs/video/renderer/glsl/glsl_draw.c

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/*
glsl_draw.c
2D drawing support for GLSL
Copyright (C) 2011 Bill Currie <bill@taniwha.org>
Author: Bill Currie <bill@taniwha.org>
Date: 2011/12/23
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to:
Free Software Foundation, Inc.
59 Temple Place - Suite 330
Boston, MA 02111-1307, USA
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
static __attribute__ ((used)) const char rcsid[] = "$Id$";
#ifdef HAVE_STRING_H
# include <string.h>
#endif
#ifdef HAVE_STRINGS_H
# include <strings.h>
#endif
#include "QF/cvar.h"
#include "QF/draw.h"
#include "QF/dstring.h"
#include "QF/hash.h"
#include "QF/quakefs.h"
#include "QF/sys.h"
#include "QF/vid.h"
#include "QF/GLSL/defines.h"
#include "QF/GLSL/funcs.h"
#include "QF/GLSL/qf_textures.h"
#include "QF/GLSL/qf_vid.h"
#include "gl_draw.h"
#include "r_cvar.h"
#include "r_local.h"
#include "r_shared.h"
typedef struct {
int texnum;
} glpic_t;
typedef struct cachepic_s {
struct cachepic_s *next;
char *name;
qpic_t *pic;
} cachepic_t;
static const char quakeicon_vert[] =
#include "quakeico.vc"
;
static const char quaketext_vert[] =
#include "quaketxt.vc"
;
static const char quake2d_frag[] =
#include "quake2d.fc"
;
static float proj_matrix[16];
static struct {
int program;
shaderparam_t charmap;
shaderparam_t palette;
shaderparam_t matrix;
shaderparam_t vertex;
shaderparam_t color;
shaderparam_t dchar;
} quake_text = {
0,
{"texture", 1},
{"palette", 1},
{"mvp_mat", 1},
{"vertex", 0},
{"vcolor", 0},
{"char", 0},
};
static struct {
int program;
shaderparam_t icon;
shaderparam_t palette;
shaderparam_t matrix;
shaderparam_t vertex;
shaderparam_t color;
} quake_icon = {
0,
{"texture", 1},
{"palette", 1},
{"mvp_mat", 1},
{"vertex", 0},
{"vcolor", 0},
};
VISIBLE byte *draw_chars;
static byte white_block[8 * 8];
static dstring_t *char_queue;
static int char_texture;
static int conback_texture;
static qpic_t *crosshair_pic;
static qpic_t *white_pic;
static qpic_t *backtile_pic;
static hashtab_t *pic_cache;
static qpic_t *
make_glpic (const char *name, qpic_t *p)
{
qpic_t *pic = 0;
glpic_t *gl;
if (p) {
// FIXME is alignment ok?
pic = malloc (sizeof (qpic_t) + sizeof (glpic_t));
*pic = *p;
gl = (glpic_t *) pic->data;
gl->texnum = GL_LoadQuakeTexture (name, p->width, p->height, p->data);
}
return pic;
}
static void
pic_free (qpic_t *pic)
{
glpic_t *gl = (glpic_t *) pic->data;
GL_ReleaseTexture (gl->texnum);
free (pic);
}
//FIXME nicer allocator
static cachepic_t *
new_cachepic (const char *name, qpic_t *pic)
{
cachepic_t *cp;
cp = malloc (sizeof (cachepic_t));
cp->name = strdup (name);
cp->pic = pic;
return cp;
}
static const char *
cachepic_getkey (void *_cp, void *unused)
{
return ((cachepic_t *) _cp)->name;
}
static void
cachepic_free (void *_cp, void *unused)
{
cachepic_t *cp = (cachepic_t *) _cp;
pic_free (cp->pic);
free (cp->name);
free (cp);
}
static qpic_t *
pic_data (const char *name, int w, int h, const byte *data)
{
qpic_t *pic;
qpic_t *glpic;
pic = malloc (field_offset (qpic_t, data[w * h]));
pic->width = w;
pic->height = h;
memcpy (pic->data, data, pic->width * pic->height);
glpic = make_glpic (name, pic);
free (pic);
return glpic;
}
static void
make_quad (qpic_t *pic, int x, int y, int w, int h,
int srcx, int srcy, int srcw, int srch, float verts[6][4])
{
float sl, sh, tl, th;
sl = (float) srcx / (float) pic->width;
sh = sl + (float) srcw / (float) pic->width;
tl = (float) srcy / (float) pic->height;
th = tl + (float) srch / (float) pic->height;
verts[0][0] = x;
verts[0][1] = y;
verts[0][2] = sl;
verts[0][3] = tl;
verts[1][0] = x + w;
verts[1][1] = y;
verts[1][2] = sh;
verts[1][3] = tl;
verts[2][0] = x + w;
verts[2][1] = y + h;
verts[2][2] = sh;
verts[2][3] = th;
verts[3][0] = x;
verts[3][1] = y;
verts[3][2] = sl;
verts[3][3] = tl;
verts[4][0] = x + w;
verts[4][1] = y + h;
verts[4][2] = sh;
verts[4][3] = th;
verts[5][0] = x;
verts[5][1] = y + h;
verts[5][2] = sl;
verts[5][3] = th;
}
static void
draw_pic (int x, int y, int w, int h, qpic_t *pic,
int srcx, int srcy, int srcw, int srch,
float *color)
{
glpic_t *gl;
float verts[6][4];
make_quad (pic, x, y, w, h, srcx, srcy, srcw, srch, verts);
gl = (glpic_t *) pic->data;
qfglUseProgram (quake_icon.program);
qfglEnableVertexAttribArray (quake_icon.vertex.location);
qfglUniformMatrix4fv (quake_icon.matrix.location, 1, false, proj_matrix);
qfglUniform1i (quake_icon.icon.location, 0);
qfglActiveTexture (GL_TEXTURE0 + 0);
qfglEnable (GL_TEXTURE_2D);
qfglBindTexture (GL_TEXTURE_2D, gl->texnum);
qfglUniform1i (quake_icon.palette.location, 1);
qfglActiveTexture (GL_TEXTURE0 + 1);
qfglEnable (GL_TEXTURE_2D);
qfglBindTexture (GL_TEXTURE_2D, glsl_palette);
qfglVertexAttrib4fv (quake_icon.color.location, color);
qfglVertexAttribPointer (quake_icon.vertex.location, 4, GL_FLOAT,
0, 0, verts);
qfglDrawArrays (GL_TRIANGLES, 0, 6);
qfglDisableVertexAttribArray (quake_icon.vertex.location);
}
VISIBLE qpic_t *
Draw_PicFromWad (const char *name)
{
return make_glpic (name, W_GetLumpName (name));
}
VISIBLE qpic_t *
Draw_CachePic (const char *path, qboolean alpha)
{
qpic_t *p, *pic;
cachepic_t *cpic;
if ((cpic = Hash_Find (pic_cache, path)))
return cpic->pic;
if (strlen (path) < 4 || strcmp (path + strlen (path) - 4, ".lmp")
|| !(p = (qpic_t *) QFS_LoadFile (path, 0))) {
//FIXME load a null texture
Sys_Error ("Draw_CachePic: failed to load %s", path);
}
pic = make_glpic (path, p);
free (p);
cpic = new_cachepic (path, pic);
Hash_Add (pic_cache, cpic);
return pic;
}
VISIBLE void
Draw_TextBox (int x, int y, int width, int lines, byte alpha)
{
static quat_t color = { 1, 1, 1, 0 };
qpic_t *p;
int cx, cy, n;
#define draw(px,py,pp) \
draw_pic (px, py, pp->width, pp->height, pp, \
0, 0, pp->width, pp->height, color)
color[3] = alpha / 255.0;
// draw left side
cx = x;
cy = y;
p = Draw_CachePic ("gfx/box_tl.lmp", true);
draw (cx, cy, p);
p = Draw_CachePic ("gfx/box_ml.lmp", true);
for (n = 0; n < lines; n++) {
cy += 8;
draw (cx, cy, p);
}
p = Draw_CachePic ("gfx/box_bl.lmp", true);
draw (cx, cy + 8, p);
// draw middle
cx += 8;
while (width > 0) {
cy = y;
p = Draw_CachePic ("gfx/box_tm.lmp", true);
draw (cx, cy, p);
p = Draw_CachePic ("gfx/box_mm.lmp", true);
for (n = 0; n < lines; n++) {
cy += 8;
if (n == 1)
p = Draw_CachePic ("gfx/box_mm2.lmp", true);
draw (cx, cy, p);
}
p = Draw_CachePic ("gfx/box_bm.lmp", true);
draw (cx, cy + 8, p);
width -= 2;
cx += 16;
}
// draw right side
cy = y;
p = Draw_CachePic ("gfx/box_tr.lmp", true);
draw (cx, cy, p);
p = Draw_CachePic ("gfx/box_mr.lmp", true);
for (n = 0; n < lines; n++) {
cy += 8;
draw (cx, cy, p);
}
p = Draw_CachePic ("gfx/box_br.lmp", true);
draw (cx, cy + 8, p);
#undef draw
}
static void
Draw_ClearCache (int phase)
{
if (phase)
return;
Hash_FlushTable (pic_cache);
}
VISIBLE void
Draw_Init (void)
{
int i;
int frag, vert;
qpic_t *pic;
glpic_t *gl;
pic_cache = Hash_NewTable (127, cachepic_getkey, cachepic_free, 0);
QFS_GamedirCallback (Draw_ClearCache);
//FIXME temporary work around for the timing of cvar creation and palette
//loading
crosshaircolor->callback (crosshaircolor);
char_queue = dstring_new ();
vert = GL_CompileShader ("quaketxt.vert", quaketext_vert, GL_VERTEX_SHADER);
frag = GL_CompileShader ("quake2d.frag", quake2d_frag, GL_FRAGMENT_SHADER);
quake_text.program = GL_LinkProgram ("quaketxt", vert, frag);
GL_ResolveShaderParam (quake_text.program, &quake_text.charmap);
GL_ResolveShaderParam (quake_text.program, &quake_text.palette);
GL_ResolveShaderParam (quake_text.program, &quake_text.matrix);
GL_ResolveShaderParam (quake_text.program, &quake_text.vertex);
GL_ResolveShaderParam (quake_text.program, &quake_text.color);
GL_ResolveShaderParam (quake_text.program, &quake_text.dchar);
vert = GL_CompileShader ("quakeico.vert", quakeicon_vert, GL_VERTEX_SHADER);
quake_icon.program = GL_LinkProgram ("quakeico", vert, frag);
GL_ResolveShaderParam (quake_icon.program, &quake_icon.icon);
GL_ResolveShaderParam (quake_icon.program, &quake_icon.palette);
GL_ResolveShaderParam (quake_icon.program, &quake_icon.matrix);
GL_ResolveShaderParam (quake_icon.program, &quake_icon.vertex);
GL_ResolveShaderParam (quake_icon.program, &quake_icon.color);
draw_chars = W_GetLumpName ("conchars");
for (i = 0; i < 256 * 64; i++)
if (draw_chars[i] == 0)
draw_chars[i] = 255; // proper transparent color
char_texture = GL_LoadQuakeTexture ("conchars", 128, 128, draw_chars);
pic = (qpic_t *) QFS_LoadFile ("gfx/conback.lmp", 0);
if (pic) {
SwapPic (pic);
conback_texture = GL_LoadQuakeTexture ("conback",
pic->width, pic->height,
pic->data);
free (pic);
}
pic = Draw_CrosshairPic ();
crosshair_pic = make_glpic ("crosshair", pic);
free (pic);
memset (white_block, 0xfe, sizeof (white_block));
white_pic = pic_data ("white_block", 8, 8, white_block);
backtile_pic = Draw_PicFromWad ("backtile");
gl = (glpic_t *) backtile_pic->data;
qfglBindTexture (GL_TEXTURE_2D, gl->texnum);
qfglTexParameterf (GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
qfglTexParameterf (GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
}
static inline void
queue_character (int x, int y, byte chr)
{
unsigned short *v;
unsigned i, c;
const int size = 5 * 2 * 6;
char_queue->size += size;
dstring_adjust (char_queue);
v = (unsigned short *) (char_queue->str + char_queue->size - size);
c = 0x738;
for (i = 0; i < 6; i++, c >>= 2) {
*v++ = x;
*v++ = y;
*v++ = c & 1;
*v++ = (c >> 1) & 1;
*v++ = chr;
}
}
static void
flush_text (void)
{
qfglUseProgram (quake_text.program);
qfglEnableVertexAttribArray (quake_text.vertex.location);
qfglEnableVertexAttribArray (quake_text.dchar.location);
qfglUniformMatrix4fv (quake_text.matrix.location, 1, false, proj_matrix);
qfglUniform1i (quake_text.charmap.location, 0);
qfglActiveTexture (GL_TEXTURE0 + 0);
qfglEnable (GL_TEXTURE_2D);
qfglBindTexture (GL_TEXTURE_2D, char_texture);
qfglUniform1i (quake_text.palette.location, 1);
qfglActiveTexture (GL_TEXTURE0 + 1);
qfglEnable (GL_TEXTURE_2D);
qfglBindTexture (GL_TEXTURE_2D, glsl_palette);
qfglVertexAttrib4f (quake_text.color.location, 1, 1, 1, 1);
qfglVertexAttribPointer (quake_text.vertex.location, 4, GL_UNSIGNED_SHORT,
0, 10, char_queue->str);
qfglVertexAttribPointer (quake_text.dchar.location, 1, GL_UNSIGNED_SHORT,
0, 10, char_queue->str + 8);
qfglDrawArrays (GL_TRIANGLES, 0, char_queue->size / 10);
qfglDisableVertexAttribArray (quake_text.dchar.location);
qfglDisableVertexAttribArray (quake_text.vertex.location);
char_queue->size = 0;
}
VISIBLE void
Draw_Character (int x, int y, unsigned int chr)
{
chr &= 255;
if (chr == 32)
return; // space
if (y <= -8)
return; // totally off screen
queue_character (x, y, chr);
}
VISIBLE void
Draw_String (int x, int y, const char *str)
{
byte chr;
if (!str || !str[0])
return; // totally off screen
if (y <= -8)
return; // totally off screen
while (*str) {
if ((chr = *str++) != 32)
queue_character (x, y, chr);
x += 8;
}
}
VISIBLE void
Draw_nString (int x, int y, const char *str, int count)
{
byte chr;
if (!str || !str[0])
return; // totally off screen
if (y <= -8)
return; // totally off screen
while (count-- && *str) {
if ((chr = *str++) != 32)
queue_character (x, y, chr);
x += 8;
}
}
void
Draw_AltString (int x, int y, const char *str)
{
byte chr;
if (!str || !str[0])
return;
if (y <= -8)
return; // totally off screen
while (*str) {
if ((chr = *str++ | 0x80) != (0x80 | 32)) { // Don't render spaces
queue_character (x, y, chr);
}
x += 8;
}
}
static void
crosshair_1 (int x, int y)
{
Draw_Character (x - 4, y - 4, '+');
}
//FIXME these should use an index to select the region.
static void
crosshair_2 (int x, int y)
{
draw_pic (x, y, CROSSHAIR_WIDTH, CROSSHAIR_HEIGHT, crosshair_pic,
0, 0, CROSSHAIR_WIDTH, CROSSHAIR_HEIGHT, crosshair_color);
}
static void
crosshair_3 (int x, int y)
{
draw_pic (x, y, CROSSHAIR_WIDTH, CROSSHAIR_HEIGHT, crosshair_pic,
CROSSHAIR_WIDTH, 0,
CROSSHAIR_WIDTH, CROSSHAIR_HEIGHT, crosshair_color);
}
static void
crosshair_4 (int x, int y)
{
draw_pic (x, y, CROSSHAIR_WIDTH, CROSSHAIR_HEIGHT, crosshair_pic,
0, CROSSHAIR_HEIGHT,
CROSSHAIR_WIDTH, CROSSHAIR_HEIGHT, crosshair_color);
}
static void
crosshair_5 (int x, int y)
{
draw_pic (x, y, CROSSHAIR_WIDTH, CROSSHAIR_HEIGHT, crosshair_pic,
CROSSHAIR_WIDTH, CROSSHAIR_HEIGHT,
CROSSHAIR_WIDTH, CROSSHAIR_HEIGHT, crosshair_color);
}
static void (*crosshair_func[]) (int x, int y) = {
crosshair_1,
crosshair_2,
crosshair_3,
crosshair_4,
crosshair_5,
};
VISIBLE void
Draw_Crosshair (void)
{
int x, y;
size_t ch;
ch = crosshair->int_val - 1;
if (ch >= sizeof (crosshair_func) / sizeof (crosshair_func[0]))
return;
x = vid.conwidth / 2 + cl_crossx->int_val;
y = vid.conheight / 2 + cl_crossy->int_val;
crosshair_func[ch] (x, y);
}
void
Draw_CrosshairAt (int ch, int x, int y)
{
unsigned c = ch - 1;
if (c >= sizeof (crosshair_func) / sizeof (crosshair_func[0]))
return;
crosshair_func[c] (x, y);
}
VISIBLE void
Draw_Pic (int x, int y, qpic_t *pic)
{
static quat_t color = { 1, 1, 1, 1};
draw_pic (x, y, pic->width, pic->height, pic,
0, 0, pic->width, pic->height, color);
}
VISIBLE void
Draw_SubPic (int x, int y, qpic_t *pic, int srcx, int srcy, int width,
int height)
{
static quat_t color = { 1, 1, 1, 1};
draw_pic (x, y, width, height, pic, srcx, srcy, width, height, color);
}
VISIBLE void
Draw_ConsoleBackground (int lines, byte alpha)
{
float ofs = (vid.conheight - lines) / (float) vid.conheight;
float verts[][4] = {
{ 0, 0, 0, ofs},
{vid.conwidth, 0, 1, ofs},
{vid.conwidth, lines, 1, 1},
{ 0, 0, 0, ofs},
{vid.conwidth, lines, 1, 1},
{ 0, lines, 0, 1},
};
GL_FlushText (); // Flush text that should be rendered before the console
qfglUseProgram (quake_icon.program);
qfglEnableVertexAttribArray (quake_icon.vertex.location);
qfglUniformMatrix4fv (quake_icon.matrix.location, 1, false, proj_matrix);
qfglUniform1i (quake_icon.icon.location, 0);
qfglActiveTexture (GL_TEXTURE0 + 0);
qfglEnable (GL_TEXTURE_2D);
qfglBindTexture (GL_TEXTURE_2D, conback_texture);
qfglUniform1i (quake_icon.palette.location, 1);
qfglActiveTexture (GL_TEXTURE0 + 1);
qfglEnable (GL_TEXTURE_2D);
qfglBindTexture (GL_TEXTURE_2D, glsl_palette);
qfglVertexAttrib4f (quake_icon.color.location,
1, 1, 1, bound (0, alpha, 255) / 255.0);
qfglVertexAttribPointer (quake_icon.vertex.location, 4, GL_FLOAT,
0, 0, verts);
qfglDrawArrays (GL_TRIANGLES, 0, 6);
qfglDisableVertexAttribArray (quake_icon.vertex.location);
}
VISIBLE void
Draw_TileClear (int x, int y, int w, int h)
{
static quat_t color = { 1, 1, 1, 1 };
draw_pic (x, y, w, h, backtile_pic, x, y, w, h, color);
}
VISIBLE void
Draw_Fill (int x, int y, int w, int h, int c)
{
quat_t color;
VectorScale (vid.palette + c * 3, 1.0f/255.0f, color);
color[3] = 1.0;
draw_pic (x, y, w, h, white_pic, 0, 0, 8, 8, color);
}
VISIBLE void
Draw_FadeScreen (void)
{
static quat_t color = { 0, 0, 0, 0.7 };
GL_FlushText (); // Flush text that should be rendered before the menu
draw_pic (0, 0, vid.conwidth, vid.conheight, white_pic, 0, 0, 8, 8, color);
}
static void
ortho_mat (float *proj, float xmin, float xmax, float ymin, float ymax,
float znear, float zfar)
{
proj[0] = 2/(xmax-xmin);
proj[4] = 0;
proj[8] = 0;
proj[12] = -(xmax+xmin)/(xmax-xmin);
proj[1] = 0;
proj[5] = 2/(ymax-ymin);
proj[9] = 0;
proj[13] = -(ymax+ymin)/(ymax-ymin);
proj[2] = 0;
proj[6] = 0;
proj[10] = -2/(zfar-znear);
proj[14] = -(zfar+znear)/(zfar-znear);
proj[3] = 0;
proj[7] = 0;
proj[11] = 0;
proj[15] = 1;
}
static void
set_2d (int width, int height)
{
qfglViewport (0, 0, vid.width, vid.height);
qfglDisable (GL_DEPTH_TEST);
qfglDisable (GL_CULL_FACE);
ortho_mat (proj_matrix, 0, width, height, 0, -99999, 99999);
}
void
GL_Set2D (void)
{
set_2d (vid.width, vid.height);
}
void
GL_Set2DScaled (void)
{
set_2d (vid.conwidth, vid.conheight);
}
void
GL_DrawReset (void)
{
char_queue->size = 0;
}
void
GL_FlushText (void)
{
if (char_queue->size)
flush_text ();
}
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