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video.cpp
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video.cpp
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/* Caprice32 - Amstrad CPC Emulator
(c) Copyright 1997-2004 Ulrich Doewich
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 the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/*
This file includes video filters from the SMS Plus/SDL
sega master system emulator :
(c) Copyright Gregory Montoir
http://membres.lycos.fr/cyxdown/smssdl/
*/
/*
This file includes video filters from MAME
(Multiple Arcade Machine Emulator) :
(c) Copyright The MAME Team
http://www.mame.net/
*/
#include "video.h"
#include "cap32.h"
#ifdef HAVE_GL
#include "SDL_opengl.h"
#endif
#include "glfuncs.h"
#include <math.h>
// the real video surface
static SDL_Surface* vid;
// the video surface shown by the plugin to the application
static SDL_Surface* pub;
extern t_CPC CPC;
#ifndef min
#define min(a,b) (a<b ? a : b)
#endif
#ifndef max
#define max(a,b) (a>b ? a : b)
#endif
// checks for an OpenGL extension
bool have_gl_extension (char *nom_ext)
{
#ifndef HAVE_GL
return false;
#else
const char *ext;
ext = (const char *) (eglGetString (GL_EXTENSIONS));
const char *f;
if (ext == NULL)
return false;
f = ext + strlen (ext);
while (ext < f)
{
unsigned int n = strcspn (ext, " ");
if ((strlen (nom_ext) == n) && (strncmp (nom_ext, ext, n) == 0))
return true;
ext += (n + 1);
}
return false;
#endif
}
// computes the clipping of two rectangles and changes src and dst accordingly
// dst is the screen
// src is the internal window
void compute_rects(SDL_Rect* src, SDL_Rect* dst)
{
/* initialise the source rect to full source */
src->x=0;
src->y=0;
src->w=pub->w;
src->h=pub->h;
dst->x=(vid->w-CPC_VISIBLE_SCR_WIDTH*2)/2,
dst->y=(vid->h-CPC_VISIBLE_SCR_HEIGHT*2)/2;
dst->w=vid->w;
dst->h=vid->h;
int dw=src->w*2-dst->w;
/* the src width is too big */
if (dw>0)
{
src->w-=dw/2;
src->x+=dw/4;
dst->x=0;
dst->w=vid->w;
}
else
{
dst->w=CPC_VISIBLE_SCR_WIDTH*2;
}
int dh=src->h*2-dst->h;
/* the src height is too big */
if (dh>0)
{
src->h-=dh/2;
src->y+=dh/4;
dst->y=0;
dst->h=vid->h;
}
else
{
src->h-=2*3;
dst->h=CPC_VISIBLE_SCR_HEIGHT*2;
}
}
/* ------------------------------------------------------------------------------------ */
/* Half size video plugin ------------------------------------------------------------- */
/* ------------------------------------------------------------------------------------ */
SDL_Surface* half_init(int w,int h, int bpp,bool fs)
{
if (!fs)
{
w=CPC_VISIBLE_SCR_WIDTH;
h=CPC_VISIBLE_SCR_HEIGHT;
}
vid=SDL_SetVideoMode(w,h,bpp,SDL_ANYFORMAT | SDL_HWSURFACE | SDL_HWPALETTE | (fs?SDL_FULLSCREEN:0));
if (!vid)
return NULL;
SDL_FillRect(vid,NULL,SDL_MapRGB(vid->format,0,0,0));
pub=SDL_CreateRGBSurface(SDL_SWSURFACE,CPC_VISIBLE_SCR_WIDTH,CPC_VISIBLE_SCR_HEIGHT,bpp,0,0,0,0);
return pub;
}
void half_setpal(SDL_Color* c)
{
SDL_SetPalette(vid, SDL_LOGPAL | SDL_PHYSPAL, c, 0, 32);
SDL_SetPalette(pub, SDL_LOGPAL | SDL_PHYSPAL, c, 0, 32);
}
bool half_lock()
{
return true;
}
void half_unlock()
{
}
void half_flip()
{
SDL_Rect dr;
dr.x=(vid->w-CPC_VISIBLE_SCR_WIDTH)/2;
dr.y=(vid->h-CPC_VISIBLE_SCR_HEIGHT)/2;
dr.w=CPC_VISIBLE_SCR_WIDTH;
dr.h=CPC_VISIBLE_SCR_HEIGHT;
SDL_BlitSurface(pub,NULL,vid,&dr);
SDL_UpdateRects(vid,1,&dr);
}
void half_close()
{
if (!vid)
return;
SDL_FreeSurface(pub);
}
/* ------------------------------------------------------------------------------------ */
/* Half size with hardware flip video plugin ------------------------------------------ */
/* ------------------------------------------------------------------------------------ */
SDL_Surface* halfhw_init(int w,int h, int bpp, bool fs)
{
if (!fs)
{
w=CPC_VISIBLE_SCR_WIDTH;
h=CPC_VISIBLE_SCR_HEIGHT;
}
vid=SDL_SetVideoMode(CPC_VISIBLE_SCR_WIDTH,CPC_VISIBLE_SCR_HEIGHT,bpp,SDL_ANYFORMAT | SDL_DOUBLEBUF | SDL_HWSURFACE | SDL_HWPALETTE | (fs?SDL_FULLSCREEN:0));
if (!vid)
return NULL;
SDL_FillRect(vid,NULL,SDL_MapRGB(vid->format,0,0,0));
return vid;
}
void halfhw_setpal(SDL_Color* c)
{
SDL_SetPalette(vid, SDL_LOGPAL | SDL_PHYSPAL, c, 0, 32);
}
bool halfhw_lock()
{
if (SDL_MUSTLOCK(vid))
return (SDL_LockSurface(vid)==0);
return true;
}
void halfhw_unlock()
{
if (SDL_MUSTLOCK(vid))
SDL_UnlockSurface(vid);
}
void halfhw_flip()
{
SDL_Flip(vid);
}
void halfhw_close()
{
}
/* ------------------------------------------------------------------------------------ */
/* Double width video plugin ---------------------------------------------------------- */
/* ------------------------------------------------------------------------------------ */
SDL_Surface* doublew_init(int w,int h, int bpp, bool fs)
{
if (!fs)
{
w=CPC_VISIBLE_SCR_WIDTH*2;
h=CPC_VISIBLE_SCR_HEIGHT;
}
vid=SDL_SetVideoMode(w,h,bpp,SDL_ANYFORMAT | SDL_HWSURFACE | SDL_HWPALETTE | (fs?SDL_FULLSCREEN:0));
if (!vid)
return NULL;
SDL_FillRect(vid,NULL,SDL_MapRGB(vid->format,0,0,0));
pub=SDL_CreateRGBSurface(SDL_SWSURFACE,CPC_VISIBLE_SCR_WIDTH*2,CPC_VISIBLE_SCR_HEIGHT,bpp,0,0,0,0);
return pub;
}
void doublew_setpal(SDL_Color* c)
{
SDL_SetPalette(vid, SDL_LOGPAL | SDL_PHYSPAL, c, 0, 32);
SDL_SetPalette(pub, SDL_LOGPAL | SDL_PHYSPAL, c, 0, 32);
}
bool doublew_lock()
{
return true;
}
void doublew_unlock()
{
}
void doublew_flip()
{
SDL_Rect dr;
dr.x=(vid->w-CPC_VISIBLE_SCR_WIDTH*2)/2;
dr.y=(vid->h-CPC_VISIBLE_SCR_HEIGHT)/2;
dr.w=CPC_VISIBLE_SCR_WIDTH*2;
dr.h=CPC_VISIBLE_SCR_HEIGHT;
SDL_BlitSurface(pub,NULL,vid,&dr);
SDL_UpdateRects(vid,1,&dr);
}
void doublew_close()
{
if (!vid)
return;
SDL_FreeSurface(pub);
}
/* ------------------------------------------------------------------------------------ */
/* Scanlines video plugin ------------------------------------------------------------- */
/* ------------------------------------------------------------------------------------ */
SDL_Surface* scanline_init(int w,int h, int bpp, bool fs)
{
if (!fs)
{
w=CPC_VISIBLE_SCR_WIDTH*2;
h=CPC_VISIBLE_SCR_HEIGHT*2;
}
vid=SDL_SetVideoMode(w,h,bpp,SDL_ANYFORMAT | SDL_HWSURFACE | SDL_HWPALETTE | (fs?SDL_FULLSCREEN:0));
if (!vid)
return NULL;
SDL_FillRect(vid,NULL,SDL_MapRGB(vid->format,0,0,0));
pub=SDL_CreateRGBSurface(SDL_SWSURFACE,CPC_VISIBLE_SCR_WIDTH*2,CPC_VISIBLE_SCR_HEIGHT,bpp,0,0,0,0);
return pub;
}
void scanline_setpal(SDL_Color* c)
{
SDL_SetPalette(vid, SDL_LOGPAL | SDL_PHYSPAL, c, 0, 32);
SDL_SetPalette(pub, SDL_LOGPAL | SDL_PHYSPAL, c, 0, 32);
}
bool scanline_lock()
{
return true;
}
void scanline_unlock()
{
}
void scanline_flip()
{
int line;
SDL_Rect sr,dr;
if (CPC_VISIBLE_SCR_WIDTH*2>vid->w)
sr.x=(CPC_VISIBLE_SCR_WIDTH*2-vid->w)/2;
else
sr.x=0;
if (CPC_VISIBLE_SCR_HEIGHT*2>vid->h)
sr.y=(CPC_VISIBLE_SCR_HEIGHT*2-vid->h)/4;
else
sr.y=0;
sr.w=pub->w;
sr.h=1;
dr.x=(vid->w-CPC_VISIBLE_SCR_WIDTH*2)/2;
dr.y=(vid->h-CPC_VISIBLE_SCR_HEIGHT*2)/2;
dr.w=pub->w;
dr.h=1;
for(line=0;line<pub->h;line++)
{
SDL_BlitSurface(pub,&sr,vid,&dr);
sr.y++;
dr.y+=2;
}
dr.x=max((vid->w-CPC_VISIBLE_SCR_WIDTH*2)/2,0);
dr.y=max((vid->h-CPC_VISIBLE_SCR_HEIGHT*2)/2,0);
dr.w=min(pub->w,vid->w);
dr.h=min(pub->h*2,vid->h);
SDL_UpdateRects(vid,1,&dr);
}
void scanline_close()
{
if (!vid)
return;
SDL_FreeSurface(pub);
}
/* ------------------------------------------------------------------------------------ */
/* Line doubling video plugin --------------------------------------------------------- */
/* ------------------------------------------------------------------------------------ */
SDL_Surface* double_init(int w,int h, int bpp, bool fs)
{
if (!fs)
{
w=CPC_VISIBLE_SCR_WIDTH*2;
h=CPC_VISIBLE_SCR_HEIGHT*2;
}
vid=SDL_SetVideoMode(w,h,bpp,SDL_ANYFORMAT | SDL_HWSURFACE | SDL_HWPALETTE | (fs?SDL_FULLSCREEN:0));
if (!vid)
return NULL;
SDL_FillRect(vid,NULL,SDL_MapRGB(vid->format,0,0,0));
pub=SDL_CreateRGBSurface(SDL_SWSURFACE,CPC_VISIBLE_SCR_WIDTH*2,CPC_VISIBLE_SCR_HEIGHT,bpp,0,0,0,0);
return pub;
}
void double_setpal(SDL_Color* c)
{
SDL_SetPalette(vid, SDL_LOGPAL | SDL_PHYSPAL, c, 0, 32);
SDL_SetPalette(pub, SDL_LOGPAL | SDL_PHYSPAL, c, 0, 32);
}
bool double_lock()
{
return true;
}
void double_unlock()
{
}
void double_flip()
{
int line;
SDL_Rect sr,dr;
if (CPC_VISIBLE_SCR_WIDTH*2>vid->w)
sr.x=(CPC_VISIBLE_SCR_WIDTH*2-vid->w)/2;
else
sr.x=0;
if (CPC_VISIBLE_SCR_HEIGHT*2>vid->h)
sr.y=(CPC_VISIBLE_SCR_HEIGHT*2-vid->h)/4;
else
sr.y=0;
sr.w=pub->w;
sr.h=1;
dr.x=(vid->w-CPC_VISIBLE_SCR_WIDTH*2)/2;
dr.y=(vid->h-CPC_VISIBLE_SCR_HEIGHT*2)/2;
dr.w=pub->w;
dr.h=1;
for(line=0;line<pub->h;line++)
{
SDL_BlitSurface(pub,&sr,vid,&dr);
dr.y++;
SDL_BlitSurface(pub,&sr,vid,&dr);
dr.y++;
sr.y++;
}
dr.x=max((vid->w-CPC_VISIBLE_SCR_WIDTH*2)/2,0);
dr.y=max((vid->h-CPC_VISIBLE_SCR_HEIGHT*2)/2,0);
dr.w=min(pub->w,vid->w);
dr.h=min(pub->h*2,vid->h);
SDL_UpdateRects(vid,1,&dr);
}
void double_close()
{
if (!vid)
return;
SDL_FreeSurface(pub);
}
/* ------------------------------------------------------------------------------------ */
/* OpenGL scaling video plugin -------------------------------------------------------- */
/* ------------------------------------------------------------------------------------ */
#ifdef HAVE_GL
static int tex_x,tex_y;
static GLuint screen_texnum,modulate_texnum;
static int gl_scanlines;
SDL_Surface* gl_init(int w,int h, int bpp, bool fs)
{
#ifdef _WIN32
char *gl_library = "OpenGL32.DLL";
#else
char *gl_library = "libGL.so.1";
#endif
int surface_bpp;
SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 0);
SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
if (SDL_GL_LoadLibrary(gl_library)<0)
{
fprintf(stderr,"Unable to dynamically open GL lib : %s\n",SDL_GetError());
return NULL;
}
if (!fs)
{
w=CPC_VISIBLE_SCR_WIDTH*2;
h=CPC_VISIBLE_SCR_HEIGHT*2;
}
vid=SDL_SetVideoMode(w,h,0,SDL_OPENGL | (fs?SDL_FULLSCREEN:0));
if (!vid)
{
fprintf(stderr, "Could not set requested video mode: %s\n", SDL_GetError());
return NULL;
}
if (init_glfuncs()!=0)
{
fprintf(stderr, "Cannot init OpenGL functions: %s\n", SDL_GetError());
return NULL;
}
int major, minor;
const char *version;
version = (char *) eglGetString(GL_VERSION);
if (sscanf(version, "%d.%d", &major, &minor) != 2) {
fprintf(stderr, "Unable to get OpenGL version\n");
return NULL;
}
GLint max_texsize;
eglGetIntegerv(GL_MAX_TEXTURE_SIZE,&max_texsize);
if (max_texsize<512) {
fprintf(stderr, "Your OpenGL implementation doesn't support 512x512 textures\n");
return NULL;
}
// We have to react differently to the bpp parameter than with software rendering
// Here are the rules :
// for 8bpp OpenGL, we need the GL_EXT_paletted_texture extension
// for 16bpp OpenGL, we need OpenGL 1.2+
// for 24bpp reversed OpenGL, we need OpenGL 1.2+
surface_bpp=0;
switch(bpp)
{
case 8:
surface_bpp = (have_gl_extension("GL_EXT_paletted_texture"))?8:0;
break;
case 15:
case 16:
surface_bpp = ((major>1)||(major == 1 && minor >= 2))?16:0;
break;
case 24:
case 32:
default:
surface_bpp = ((major>1)||(major == 1 && minor >= 2))?24:0;
break;
}
if (surface_bpp==0) {
fprintf(stderr, "Your OpenGL implementation doesn't support %dbpp textures\n",surface_bpp);
return NULL;
}
eglDisable(GL_FOG);
eglDisable(GL_LIGHTING);
eglDisable(GL_CULL_FACE);
eglDisable(GL_DEPTH_TEST);
eglDisable(GL_BLEND);
eglDisable(GL_NORMALIZE);
eglDisable(GL_ALPHA_TEST);
eglEnable(GL_TEXTURE_2D);
eglBlendFunc (GL_SRC_ALPHA, GL_ONE);
eglGenTextures(1,&screen_texnum);
eglBindTexture(GL_TEXTURE_2D,screen_texnum);
eglTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, CPC.scr_oglfilter?GL_LINEAR:GL_NEAREST);
eglTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, CPC.scr_oglfilter?GL_LINEAR:GL_NEAREST);
tex_x=512;
tex_y=512;
switch(surface_bpp)
{
case 24:
eglTexImage2D(GL_TEXTURE_2D, 0,GL_RGB,tex_x,tex_y, 0,
GL_RGB,
GL_UNSIGNED_BYTE, NULL);
break;
case 16:
eglTexImage2D(GL_TEXTURE_2D, 0,GL_RGB5,tex_x,tex_y, 0,
GL_RGB,
GL_UNSIGNED_BYTE, NULL);
break;
case 8:
eglTexImage2D(GL_TEXTURE_2D, 0,GL_COLOR_INDEX8_EXT,tex_x,tex_y, 0,
GL_COLOR_INDEX,
GL_UNSIGNED_BYTE, NULL);
break;
}
if (gl_scanlines!=0)
{
Uint8 texmod;
switch(gl_scanlines)
{
case 25:
texmod=192; break;
case 50:
texmod=128; break;
case 75:
texmod=64; break;
case 100:
texmod=0; break;
default:
texmod=255;
}
eglGenTextures(1,&modulate_texnum);
eglBindTexture(GL_TEXTURE_2D,modulate_texnum);
eglTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, CPC.scr_oglfilter?GL_LINEAR:GL_NEAREST);
eglTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, CPC.scr_oglfilter?GL_LINEAR:GL_NEAREST);
Uint8 modulate_texture[]={
255,255,255,
0,0,0};
modulate_texture[3]=texmod;
modulate_texture[4]=texmod;
modulate_texture[5]=texmod;
eglTexImage2D(GL_TEXTURE_2D, 0,GL_RGB8,1,2, 0,GL_RGB,GL_UNSIGNED_BYTE, modulate_texture);
}
eglViewport(0,0,w,h);
eglMatrixMode(GL_PROJECTION);
eglLoadIdentity();
eglOrtho(0,w,h,0,-1.0, 1.0);
eglMatrixMode(GL_MODELVIEW);
eglLoadIdentity();
pub=SDL_CreateRGBSurface(SDL_SWSURFACE,CPC_VISIBLE_SCR_WIDTH,CPC_VISIBLE_SCR_HEIGHT,surface_bpp,0,0,0,0);
return pub;
}
SDL_Surface* glscale_init(int w,int h, int bpp, bool fs)
{
gl_scanlines=0;
return gl_init(w,h,bpp,fs);
}
SDL_Surface* glscale25_init(int w,int h, int bpp, bool fs)
{
gl_scanlines=25;
return gl_init(w,h,bpp,fs);
}
SDL_Surface* glscale50_init(int w,int h, int bpp, bool fs)
{
gl_scanlines=50;
return gl_init(w,h,bpp,fs);
}
SDL_Surface* glscale75_init(int w,int h, int bpp, bool fs)
{
gl_scanlines=75;
return gl_init(w,h,bpp,fs);
}
SDL_Surface* glscale100_init(int w,int h, int bpp, bool fs)
{
gl_scanlines=100;
return gl_init(w,h,bpp,fs);
}
void glscale_setpal(SDL_Color* c)
{
SDL_SetPalette(pub, SDL_LOGPAL | SDL_PHYSPAL, c, 0, 32);
if (pub->format->palette)
{
Uint8* pal=(Uint8*)malloc(sizeof(Uint8)*256*3);
for(int i=0;i<256;i++)
{
pal[3*i ] = pub->format->palette->colors[i].r;
pal[3*i+1] = pub->format->palette->colors[i].g;
pal[3*i+2] = pub->format->palette->colors[i].b;
}
eglBindTexture(GL_TEXTURE_2D,screen_texnum);
eglColorTableEXT(GL_TEXTURE_2D,GL_RGB8,256,GL_RGB,GL_UNSIGNED_BYTE,pal);
free(pal);
}
}
bool glscale_lock()
{
return true;
}
void glscale_unlock()
{
}
void glscale_flip()
{
eglDisable(GL_BLEND);
if (gl_scanlines!=0)
{
eglActiveTextureARB(GL_TEXTURE1_ARB);
eglEnable(GL_TEXTURE_2D);
eglBindTexture(GL_TEXTURE_2D,modulate_texnum);
eglTexEnvf (GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
eglColor4f(1.0,1.0,1.0,1.0);
eglActiveTextureARB(GL_TEXTURE0_ARB);
}
eglEnable(GL_TEXTURE_2D);
eglBindTexture(GL_TEXTURE_2D,screen_texnum);
if (CPC.scr_remanency)
{
/* draw again using the old texture */
eglBegin(GL_QUADS);
eglColor4f(1.0,1.0,1.0,1.0);
eglTexCoord2f(0.f, 0.f);
if (gl_scanlines!=0)
eglMultiTexCoord2fARB(GL_TEXTURE1_ARB,0.f, 0.f);
eglVertex2i(0, 0);
eglTexCoord2f(0.f, (float)(pub->h)/tex_y);
if (gl_scanlines!=0)
eglMultiTexCoord2fARB(GL_TEXTURE1_ARB,0.f, vid->h/2);
eglVertex2i(0, vid->h);
eglTexCoord2f((float)(pub->w)/tex_x, (float)(pub->h)/tex_y);
if (gl_scanlines!=0)
eglMultiTexCoord2fARB(GL_TEXTURE1_ARB,vid->w, vid->h/2);
eglVertex2i(vid->w, vid->h);
eglTexCoord2f((float)(pub->w)/tex_x, 0.f);
if (gl_scanlines!=0)
eglMultiTexCoord2fARB(GL_TEXTURE1_ARB,vid->w, 0);
eglVertex2i(vid->w, 0);
eglEnd();
/* enable blending for the subsequent pass */
eglEnable(GL_BLEND);
eglBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
}
/* upload the texture */
switch(pub->format->BitsPerPixel)
{
case 24:
eglTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0,
pub->w, pub->h,
GL_BGR,GL_UNSIGNED_BYTE,
pub->pixels);
break;
case 16:
eglTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0,
pub->w, pub->h,
GL_RGB,GL_UNSIGNED_SHORT_5_6_5,
pub->pixels);
break;
case 8:
eglTexSubImage2D (GL_TEXTURE_2D, 0, 0, 0,
pub->w,pub->h,
GL_COLOR_INDEX, GL_UNSIGNED_BYTE,
pub->pixels);
break;
}
/* draw ! */
eglBegin(GL_QUADS);
eglColor4f(1.0,1.0,1.0,0.5);
eglTexCoord2f(0.f, 0.f);
if (gl_scanlines!=0)
eglMultiTexCoord2fARB(GL_TEXTURE1_ARB,0.f, 0.f);
eglVertex2i(0, 0);
eglTexCoord2f(0.f, (float)(pub->h)/tex_y);
if (gl_scanlines!=0)
eglMultiTexCoord2fARB(GL_TEXTURE1_ARB,0.f, vid->h/2);
eglVertex2i(0, vid->h);
eglTexCoord2f((float)(pub->w)/tex_x, (float)(pub->h)/tex_y);
if (gl_scanlines!=0)
eglMultiTexCoord2fARB(GL_TEXTURE1_ARB,vid->w, vid->h/2);
eglVertex2i(vid->w, vid->h);
eglTexCoord2f((float)(pub->w)/tex_x, 0.f);
if (gl_scanlines!=0)
eglMultiTexCoord2fARB(GL_TEXTURE1_ARB,vid->w, 0);
eglVertex2i(vid->w, 0);
eglEnd();
SDL_GL_SwapBuffers();
}
void glscale_close()
{
if (!vid)
return;
SDL_FreeSurface(pub);
if (eglIsTexture(screen_texnum))
eglDeleteTextures(1,&screen_texnum);
if (eglIsTexture(modulate_texnum))
eglDeleteTextures(1,&modulate_texnum);
}
#endif
/* ------------------------------------------------------------------------------------ */
/* Super eagle video plugin ----------------------------------------------------------- */
/* ------------------------------------------------------------------------------------ */
/* 2X SAI Filter */
static Uint32 colorMask = 0xF7DEF7DE;
static Uint32 lowPixelMask = 0x08210821;
static Uint32 qcolorMask = 0xE79CE79C;
static Uint32 qlowpixelMask = 0x18631863;
static Uint32 redblueMask = 0xF81F;
static Uint32 greenMask = 0x7E0;
__inline__ int GetResult1 (Uint32 A, Uint32 B, Uint32 C, Uint32 D, Uint32 E)
{
int x = 0;
int y = 0;
int r = 0;
if (A == C)
x += 1;
else if (B == C)
y += 1;
if (A == D)
x += 1;
else if (B == D)
y += 1;
if (x <= 1)
r += 1;
if (y <= 1)
r -= 1;
return r;
}
__inline__ int GetResult2 (Uint32 A, Uint32 B, Uint32 C, Uint32 D, Uint32 E)
{
int x = 0;
int y = 0;
int r = 0;
if (A == C)
x += 1;
else if (B == C)
y += 1;
if (A == D)
x += 1;
else if (B == D)
y += 1;
if (x <= 1)
r -= 1;
if (y <= 1)
r += 1;
return r;
}
__inline__ int GetResult (Uint32 A, Uint32 B, Uint32 C, Uint32 D)
{
int x = 0;
int y = 0;
int r = 0;
if (A == C)
x += 1;
else if (B == C)
y += 1;
if (A == D)
x += 1;
else if (B == D)
y += 1;
if (x <= 1)
r += 1;
if (y <= 1)
r -= 1;
return r;
}
__inline__ Uint32 INTERPOLATE (Uint32 A, Uint32 B)
{
if (A != B)
{
return (((A & colorMask) >> 1) + ((B & colorMask) >> 1) +
(A & B & lowPixelMask));
}
else
return A;
}
__inline__ Uint32 Q_INTERPOLATE (Uint32 A, Uint32 B, Uint32 C, Uint32 D)
{
register Uint32 x = ((A & qcolorMask) >> 2) +
((B & qcolorMask) >> 2) +
((C & qcolorMask) >> 2) + ((D & qcolorMask) >> 2);
register Uint32 y = (A & qlowpixelMask) +
(B & qlowpixelMask) + (C & qlowpixelMask) + (D & qlowpixelMask);
y = (y >> 2) & qlowpixelMask;
return x + y;
}
void filter_supereagle(Uint8 *srcPtr, Uint32 srcPitch, /* Uint8 *deltaPtr, */
Uint8 *dstPtr, Uint32 dstPitch, int width, int height)
{
Uint8 *dP;
Uint16 *bP;
Uint32 inc_bP;
Uint32 finish;
Uint32 Nextline = srcPitch >> 1;
inc_bP = 1;
for (; height ; height--)
{
bP = (Uint16 *) srcPtr;
dP = dstPtr;
for (finish = width; finish; finish -= inc_bP)
{
Uint32 color4, color5, color6;
Uint32 color1, color2, color3;
Uint32 colorA1, colorA2, colorB1, colorB2, colorS1, colorS2;
Uint32 product1a, product1b, product2a, product2b;
colorB1 = *(bP - Nextline);
colorB2 = *(bP - Nextline + 1);
color4 = *(bP - 1);
color5 = *(bP);
color6 = *(bP + 1);
colorS2 = *(bP + 2);
color1 = *(bP + Nextline - 1);
color2 = *(bP + Nextline);
color3 = *(bP + Nextline + 1);
colorS1 = *(bP + Nextline + 2);
colorA1 = *(bP + Nextline + Nextline);
colorA2 = *(bP + Nextline + Nextline + 1);
// --------------------------------------
if (color2 == color6 && color5 != color3)
{
product1b = product2a = color2;
if ((color1 == color2) || (color6 == colorB2))
{
product1a = INTERPOLATE (color2, color5);
product1a = INTERPOLATE (color2, product1a);
// product1a = color2;
}
else
{
product1a = INTERPOLATE (color5, color6);
}
if ((color6 == colorS2) || (color2 == colorA1))
{
product2b = INTERPOLATE (color2, color3);
product2b = INTERPOLATE (color2, product2b);
// product2b = color2;
}
else
{
product2b = INTERPOLATE (color2, color3);
}
}
else if (color5 == color3 && color2 != color6)
{
product2b = product1a = color5;
if ((colorB1 == color5) || (color3 == colorS1))
{
product1b = INTERPOLATE (color5, color6);
product1b = INTERPOLATE (color5, product1b);
// product1b = color5;
}
else
{
product1b = INTERPOLATE (color5, color6);
}
if ((color3 == colorA2) || (color4 == color5))
{
product2a = INTERPOLATE (color5, color2);
product2a = INTERPOLATE (color5, product2a);
// product2a = color5;
}
else
{
product2a = INTERPOLATE (color2, color3);
}
}
else if (color5 == color3 && color2 == color6)
{
register int r = 0;
r += GetResult (color6, color5, color1, colorA1);
r += GetResult (color6, color5, color4, colorB1);
r += GetResult (color6, color5, colorA2, colorS1);
r += GetResult (color6, color5, colorB2, colorS2);
if (r > 0)
{
product1b = product2a = color2;
product1a = product2b = INTERPOLATE (color5, color6);
}
else if (r < 0)
{
product2b = product1a = color5;
product1b = product2a = INTERPOLATE (color5, color6);
}
else
{
product2b = product1a = color5;
product1b = product2a = color2;
}
}
else
{
product2b = product1a = INTERPOLATE (color2, color6);
product2b =
Q_INTERPOLATE (color3, color3, color3, product2b);
product1a =
Q_INTERPOLATE (color5, color5, color5, product1a);
product2a = product1b = INTERPOLATE (color5, color3);
product2a =
Q_INTERPOLATE (color2, color2, color2, product2a);
product1b =
Q_INTERPOLATE (color6, color6, color6, product1b);
// product1a = color5;
// product1b = color6;
// product2a = color2;
// product2b = color3;
}
#if SDL_BYTEORDER == SDL_LIL_ENDIAN
product1a = product1a | (product1b << 16);
product2a = product2a | (product2b << 16);
#else
product1a = (product1a << 16) | product1b;
product2a = (product2a << 16) | product2b;
#endif
*((Uint32 *) dP) = product1a;
*((Uint32 *) (dP + dstPitch)) = product2a;
bP += inc_bP;
dP += sizeof (Uint32);
} // end of for ( finish= width etc..)
srcPtr += srcPitch;
dstPtr += dstPitch * 2;
} // endof: for (height; height; height--)
}
SDL_Surface* seagle_init(int w,int h, int bpp, bool fs)
{
if (bpp!=16)
return NULL;
if (!fs)
{