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SDL_atarigl.c
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SDL_atarigl.c
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/*
SDL - Simple DirectMedia Layer
Copyright (C) 1997-2004 Sam Lantinga
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
Sam Lantinga
slouken@libsdl.org
*/
#include "SDL_config.h"
/* Atari OSMesa.ldg implementation of SDL OpenGL support */
/*--- Includes ---*/
#if SDL_VIDEO_OPENGL
#include <GL/osmesa.h>
#endif
#include <mint/osbind.h>
#include "SDL_endian.h"
#include "SDL_video.h"
#include "SDL_atarigl_c.h"
#if SDL_VIDEO_OPENGL_OSMESA_DYNAMIC
#include "SDL_loadso.h"
#endif
/*--- Defines ---*/
#define PATH_OSMESA_LDG "osmesa.ldg"
#define PATH_MESAGL_LDG "mesa_gl.ldg"
#define PATH_TINYGL_LDG "tiny_gl.ldg"
#define VDI_RGB 0xf
/*--- Functions prototypes ---*/
static void SDL_AtariGL_UnloadLibrary (_THIS);
#if SDL_VIDEO_OPENGL
static void CopyShadowNull (_THIS, SDL_Surface * surface);
static void CopyShadowDirect (_THIS, SDL_Surface * surface);
static void CopyShadowRGBTo555 (_THIS, SDL_Surface * surface);
static void CopyShadowRGBTo565 (_THIS, SDL_Surface * surface);
static void CopyShadowRGBSwap (_THIS, SDL_Surface * surface);
static void CopyShadowRGBToARGB (_THIS, SDL_Surface * surface);
static void CopyShadowRGBToABGR (_THIS, SDL_Surface * surface);
static void CopyShadowRGBToBGRA (_THIS, SDL_Surface * surface);
static void CopyShadowRGBToRGBA (_THIS, SDL_Surface * surface);
static void CopyShadow8888To555 (_THIS, SDL_Surface * surface);
static void CopyShadow8888To565 (_THIS, SDL_Surface * surface);
static void ConvertNull (_THIS, SDL_Surface * surface);
static void Convert565To555be (_THIS, SDL_Surface * surface);
static void Convert565To555le (_THIS, SDL_Surface * surface);
static void Convert565le (_THIS, SDL_Surface * surface);
static void ConvertBGRAToABGR (_THIS, SDL_Surface * surface);
static int InitNew (_THIS, SDL_Surface * current);
static int InitOld (_THIS, SDL_Surface * current);
#endif
/*--- Public functions ---*/
int
SDL_AtariGL_Init (_THIS, SDL_Surface * current)
{
#if SDL_VIDEO_OPENGL
if (gl_oldmesa) {
gl_active = InitOld (this, current);
} else {
gl_active = InitNew (this, current);
}
#endif
return (gl_active);
}
void
SDL_AtariGL_Quit (_THIS, SDL_bool unload)
{
#if SDL_VIDEO_OPENGL
if (gl_oldmesa) {
/* Old mesa implementations */
if (this->gl_data->OSMesaDestroyLDG) {
this->gl_data->OSMesaDestroyLDG ();
}
if (gl_shadow) {
Mfree (gl_shadow);
gl_shadow = NULL;
}
} else {
/* New mesa implementation */
if (gl_ctx) {
if (this->gl_data->OSMesaDestroyContext) {
this->gl_data->OSMesaDestroyContext (gl_ctx);
}
gl_ctx = NULL;
}
}
if (unload) {
SDL_AtariGL_UnloadLibrary (this);
}
#endif /* SDL_VIDEO_OPENGL */
gl_active = 0;
}
int
SDL_AtariGL_LoadLibrary (_THIS, const char *path)
{
#if SDL_VIDEO_OPENGL
#if SDL_VIDEO_OPENGL_OSMESA_DYNAMIC
void *handle;
SDL_bool cancel_load;
if (gl_active) {
SDL_SetError ("OpenGL context already created");
return -1;
}
/* Unload previous driver */
SDL_AtariGL_UnloadLibrary (this);
/* Load library given by path */
handle = SDL_LoadObject (path);
if (handle == NULL) {
/* Try to load another one */
path = SDL_getenv ("SDL_VIDEO_GL_DRIVER");
if (path != NULL) {
handle = SDL_LoadObject (path);
}
/* If it does not work, try some other */
if (handle == NULL) {
path = PATH_OSMESA_LDG;
handle = SDL_LoadObject (path);
}
if (handle == NULL) {
path = PATH_MESAGL_LDG;
handle = SDL_LoadObject (path);
}
if (handle == NULL) {
path = PATH_TINYGL_LDG;
handle = SDL_LoadObject (path);
}
}
if (handle == NULL) {
SDL_SetError ("Could not load OpenGL library");
return -1;
}
this->gl_data->glGetIntegerv = SDL_LoadFunction (handle, "glGetIntegerv");
this->gl_data->glFinish = SDL_LoadFunction (handle, "glFinish");
this->gl_data->glFlush = SDL_LoadFunction (handle, "glFlush");
cancel_load = SDL_FALSE;
if (this->gl_data->glGetIntegerv == NULL) {
cancel_load = SDL_TRUE;
} else {
/* We need either glFinish (OSMesa) or glFlush (TinyGL) */
if ((this->gl_data->glFinish == NULL) &&
(this->gl_data->glFlush == NULL)) {
cancel_load = SDL_TRUE;
}
}
if (cancel_load) {
SDL_SetError ("Could not retrieve OpenGL functions");
SDL_UnloadObject (handle);
/* Restore pointers to static library */
SDL_AtariGL_InitPointers (this);
return -1;
}
/* Load functions pointers (osmesa.ldg) */
this->gl_data->OSMesaCreateContextExt =
SDL_LoadFunction (handle, "OSMesaCreateContextExt");
this->gl_data->OSMesaDestroyContext =
SDL_LoadFunction (handle, "OSMesaDestroyContext");
this->gl_data->OSMesaMakeCurrent =
SDL_LoadFunction (handle, "OSMesaMakeCurrent");
this->gl_data->OSMesaPixelStore =
SDL_LoadFunction (handle, "OSMesaPixelStore");
this->gl_data->OSMesaGetProcAddress =
SDL_LoadFunction (handle, "OSMesaGetProcAddress");
/* Load old functions pointers (mesa_gl.ldg, tiny_gl.ldg) */
this->gl_data->OSMesaCreateLDG =
SDL_LoadFunction (handle, "OSMesaCreateLDG");
this->gl_data->OSMesaDestroyLDG =
SDL_LoadFunction (handle, "OSMesaDestroyLDG");
gl_oldmesa = 0;
if ((this->gl_data->OSMesaCreateContextExt == NULL) ||
(this->gl_data->OSMesaDestroyContext == NULL) ||
(this->gl_data->OSMesaMakeCurrent == NULL) ||
(this->gl_data->OSMesaPixelStore == NULL) ||
(this->gl_data->OSMesaGetProcAddress == NULL)) {
/* Hum, maybe old library ? */
if ((this->gl_data->OSMesaCreateLDG == NULL) ||
(this->gl_data->OSMesaDestroyLDG == NULL)) {
SDL_SetError ("Could not retrieve OSMesa functions");
SDL_UnloadObject (handle);
/* Restore pointers to static library */
SDL_AtariGL_InitPointers (this);
return -1;
} else {
gl_oldmesa = 1;
}
}
this->gl_config.dll_handle = handle;
if (path) {
SDL_strlcpy (this->gl_config.driver_path, path,
SDL_arraysize (this->gl_config.driver_path));
} else {
*this->gl_config.driver_path = '\0';
}
#endif
this->gl_config.driver_loaded = 1;
return 0;
#else
return -1;
#endif
}
void *
SDL_AtariGL_GetProcAddress (_THIS, const char *proc)
{
void *func = NULL;
#if SDL_VIDEO_OPENGL
if (this->gl_config.dll_handle) {
func = SDL_LoadFunction (this->gl_config.dll_handle, (void *) proc);
} else if (this->gl_data->OSMesaGetProcAddress) {
func = this->gl_data->OSMesaGetProcAddress (proc);
}
#endif
return func;
}
int
SDL_AtariGL_GetAttribute (_THIS, SDL_GLattr attrib, int *value)
{
#if SDL_VIDEO_OPENGL
GLenum mesa_attrib;
SDL_Surface *surface;
if (!gl_active) {
return -1;
}
switch (attrib) {
case SDL_GL_RED_SIZE:
mesa_attrib = GL_RED_BITS;
break;
case SDL_GL_GREEN_SIZE:
mesa_attrib = GL_GREEN_BITS;
break;
case SDL_GL_BLUE_SIZE:
mesa_attrib = GL_BLUE_BITS;
break;
case SDL_GL_ALPHA_SIZE:
mesa_attrib = GL_ALPHA_BITS;
break;
case SDL_GL_DOUBLEBUFFER:
surface = this->screen;
*value = ((surface->flags & SDL_DOUBLEBUF) == SDL_DOUBLEBUF);
return 0;
case SDL_GL_DEPTH_SIZE:
mesa_attrib = GL_DEPTH_BITS;
break;
case SDL_GL_STENCIL_SIZE:
mesa_attrib = GL_STENCIL_BITS;
break;
case SDL_GL_ACCUM_RED_SIZE:
mesa_attrib = GL_ACCUM_RED_BITS;
break;
case SDL_GL_ACCUM_GREEN_SIZE:
mesa_attrib = GL_ACCUM_GREEN_BITS;
break;
case SDL_GL_ACCUM_BLUE_SIZE:
mesa_attrib = GL_ACCUM_BLUE_BITS;
break;
case SDL_GL_ACCUM_ALPHA_SIZE:
mesa_attrib = GL_ACCUM_ALPHA_BITS;
break;
default:
return -1;
}
this->gl_data->glGetIntegerv (mesa_attrib, value);
return 0;
#else
return -1;
#endif
}
int
SDL_AtariGL_MakeCurrent (_THIS)
{
#if SDL_VIDEO_OPENGL
SDL_Surface *surface;
GLenum type;
if (gl_oldmesa && gl_active) {
return 0;
}
if (this->gl_config.dll_handle) {
if ((this->gl_data->OSMesaMakeCurrent == NULL) ||
(this->gl_data->OSMesaPixelStore == NULL)) {
return -1;
}
}
if (!gl_active) {
SDL_SetError ("Invalid OpenGL context");
return -1;
}
surface = this->screen;
if ((surface->format->BitsPerPixel == 15)
|| (surface->format->BitsPerPixel == 16)) {
type = GL_UNSIGNED_SHORT_5_6_5;
} else {
type = GL_UNSIGNED_BYTE;
}
if (!
(this->gl_data->
OSMesaMakeCurrent (gl_ctx, surface->pixels, type, surface->w,
surface->h))) {
SDL_SetError ("Can not make OpenGL context current");
return -1;
}
/* OSMesa draws upside down */
this->gl_data->OSMesaPixelStore (OSMESA_Y_UP, 0);
return 0;
#else
return -1;
#endif
}
void
SDL_AtariGL_SwapBuffers (_THIS)
{
#if SDL_VIDEO_OPENGL
if (gl_active) {
if (this->gl_config.dll_handle) {
if (this->gl_data->glFinish) {
this->gl_data->glFinish ();
} else if (this->gl_data->glFlush) {
this->gl_data->glFlush ();
}
} else {
this->gl_data->glFinish ();
}
gl_copyshadow (this, this->screen);
gl_convert (this, this->screen);
}
#endif
}
void
SDL_AtariGL_InitPointers (_THIS)
{
#if SDL_VIDEO_OPENGL
this->gl_data->OSMesaCreateContextExt = OSMesaCreateContextExt;
this->gl_data->OSMesaDestroyContext = OSMesaDestroyContext;
this->gl_data->OSMesaMakeCurrent = OSMesaMakeCurrent;
this->gl_data->OSMesaPixelStore = OSMesaPixelStore;
this->gl_data->OSMesaGetProcAddress = OSMesaGetProcAddress;
this->gl_data->glGetIntegerv = glGetIntegerv;
this->gl_data->glFinish = glFinish;
this->gl_data->glFlush = glFlush;
this->gl_data->OSMesaCreateLDG = NULL;
this->gl_data->OSMesaDestroyLDG = NULL;
#endif
}
/*--- Private functions ---*/
static void
SDL_AtariGL_UnloadLibrary (_THIS)
{
#if SDL_VIDEO_OPENGL
if (this->gl_config.dll_handle) {
SDL_UnloadObject (this->gl_config.dll_handle);
this->gl_config.dll_handle = NULL;
/* Restore pointers to static library */
SDL_AtariGL_InitPointers (this);
}
#endif
}
/*--- Creation of an OpenGL context using new/old functions ---*/
#if SDL_VIDEO_OPENGL
static int
InitNew (_THIS, SDL_Surface * current)
{
GLenum osmesa_format;
SDL_PixelFormat *pixel_format;
Uint32 redmask;
int recreatecontext;
GLint newaccumsize;
if (this->gl_config.dll_handle) {
if (this->gl_data->OSMesaCreateContextExt == NULL) {
return 0;
}
}
/* Init OpenGL context using OSMesa */
gl_convert = ConvertNull;
gl_copyshadow = CopyShadowNull;
gl_upsidedown = SDL_FALSE;
pixel_format = current->format;
redmask = pixel_format->Rmask;
switch (pixel_format->BitsPerPixel) {
case 15:
/* 1555, big and little endian, unsupported */
gl_pixelsize = 2;
osmesa_format = OSMESA_RGB_565;
if (redmask == 31 << 10) {
gl_convert = Convert565To555be;
} else {
gl_convert = Convert565To555le;
}
break;
case 16:
gl_pixelsize = 2;
if (redmask == 31 << 11) {
osmesa_format = OSMESA_RGB_565;
} else {
/* 565, little endian, unsupported */
osmesa_format = OSMESA_RGB_565;
gl_convert = Convert565le;
}
break;
case 24:
gl_pixelsize = 3;
if (redmask == 255 << 16) {
osmesa_format = OSMESA_RGB;
} else {
osmesa_format = OSMESA_BGR;
}
break;
case 32:
gl_pixelsize = 4;
if (redmask == 255 << 16) {
osmesa_format = OSMESA_ARGB;
} else if (redmask == 255 << 8) {
osmesa_format = OSMESA_BGRA;
} else if (redmask == 255 << 24) {
osmesa_format = OSMESA_RGBA;
} else {
/* ABGR format unsupported */
osmesa_format = OSMESA_BGRA;
gl_convert = ConvertBGRAToABGR;
}
break;
default:
gl_pixelsize = 1;
osmesa_format = OSMESA_COLOR_INDEX;
break;
}
/* Try to keep current context if possible */
newaccumsize =
this->gl_config.accum_red_size +
this->gl_config.accum_green_size +
this->gl_config.accum_blue_size + this->gl_config.accum_alpha_size;
recreatecontext = 1;
if (gl_ctx &&
(gl_curformat == osmesa_format) &&
(gl_curdepth == this->gl_config.depth_size) &&
(gl_curstencil == this->gl_config.stencil_size) &&
(gl_curaccum == newaccumsize)) {
recreatecontext = 0;
}
if (recreatecontext) {
SDL_AtariGL_Quit (this, SDL_FALSE);
gl_ctx =
this->gl_data->OSMesaCreateContextExt (osmesa_format,
this->gl_config.
depth_size,
this->gl_config.
stencil_size,
newaccumsize, NULL);
if (gl_ctx) {
gl_curformat = osmesa_format;
gl_curdepth = this->gl_config.depth_size;
gl_curstencil = this->gl_config.stencil_size;
gl_curaccum = newaccumsize;
} else {
gl_curformat = 0;
gl_curdepth = 0;
gl_curstencil = 0;
gl_curaccum = 0;
}
}
return (gl_ctx != NULL);
}
static int
InitOld (_THIS, SDL_Surface * current)
{
GLenum osmesa_format;
SDL_PixelFormat *pixel_format;
Uint32 redmask;
int recreatecontext, tinygl_present;
if (this->gl_config.dll_handle) {
if (this->gl_data->OSMesaCreateLDG == NULL) {
return 0;
}
}
/* TinyGL only supports VDI_RGB (OSMESA_RGB) */
tinygl_present = 0;
if (this->gl_config.dll_handle) {
if (this->gl_data->glFinish == NULL) {
tinygl_present = 1;
}
}
/* Init OpenGL context using OSMesa */
gl_convert = ConvertNull;
gl_copyshadow = CopyShadowNull;
gl_upsidedown = SDL_FALSE;
pixel_format = current->format;
redmask = pixel_format->Rmask;
switch (pixel_format->BitsPerPixel) {
case 15:
/* 15 bits unsupported */
if (tinygl_present) {
gl_pixelsize = 3;
osmesa_format = VDI_RGB;
if (redmask == 31 << 10) {
gl_copyshadow = CopyShadowRGBTo555;
} else {
gl_copyshadow = CopyShadowRGBTo565;
gl_convert = Convert565To555le;
}
} else {
gl_pixelsize = 4;
gl_upsidedown = SDL_TRUE;
osmesa_format = OSMESA_ARGB;
if (redmask == 31 << 10) {
gl_copyshadow = CopyShadow8888To555;
} else {
gl_copyshadow = CopyShadow8888To565;
gl_convert = Convert565To555le;
}
}
break;
case 16:
/* 16 bits unsupported */
if (tinygl_present) {
gl_pixelsize = 3;
osmesa_format = VDI_RGB;
gl_copyshadow = CopyShadowRGBTo565;
if (redmask != 31 << 11) {
/* 565, little endian, unsupported */
gl_convert = Convert565le;
}
} else {
gl_pixelsize = 4;
gl_upsidedown = SDL_TRUE;
osmesa_format = OSMESA_ARGB;
gl_copyshadow = CopyShadow8888To565;
if (redmask != 31 << 11) {
/* 565, little endian, unsupported */
gl_convert = Convert565le;
}
}
break;
case 24:
gl_pixelsize = 3;
if (tinygl_present) {
osmesa_format = VDI_RGB;
gl_copyshadow = CopyShadowDirect;
if (redmask != 255 << 16) {
gl_copyshadow = CopyShadowRGBSwap;
}
} else {
gl_copyshadow = CopyShadowDirect;
gl_upsidedown = SDL_TRUE;
if (redmask == 255 << 16) {
osmesa_format = OSMESA_RGB;
} else {
osmesa_format = OSMESA_BGR;
}
}
break;
case 32:
if (tinygl_present) {
gl_pixelsize = 3;
osmesa_format = VDI_RGB;
gl_copyshadow = CopyShadowRGBToARGB;
if (redmask == 255) {
gl_convert = CopyShadowRGBToABGR;
} else if (redmask == 255 << 8) {
gl_convert = CopyShadowRGBToBGRA;
} else if (redmask == 255 << 24) {
gl_convert = CopyShadowRGBToRGBA;
}
} else {
gl_pixelsize = 4;
gl_upsidedown = SDL_TRUE;
gl_copyshadow = CopyShadowDirect;
if (redmask == 255 << 16) {
osmesa_format = OSMESA_ARGB;
} else if (redmask == 255 << 8) {
osmesa_format = OSMESA_BGRA;
} else if (redmask == 255 << 24) {
osmesa_format = OSMESA_RGBA;
} else {
/* ABGR format unsupported */
osmesa_format = OSMESA_BGRA;
gl_convert = ConvertBGRAToABGR;
}
}
break;
default:
if (tinygl_present) {
SDL_AtariGL_Quit (this, SDL_FALSE);
return 0;
}
gl_pixelsize = 1;
gl_copyshadow = CopyShadowDirect;
osmesa_format = OSMESA_COLOR_INDEX;
break;
}
/* Try to keep current context if possible */
recreatecontext = 1;
if (gl_shadow &&
(gl_curformat == osmesa_format) &&
(gl_curwidth == current->w) && (gl_curheight == current->h)) {
recreatecontext = 0;
}
if (recreatecontext) {
SDL_AtariGL_Quit (this, SDL_FALSE);
gl_shadow =
this->gl_data->OSMesaCreateLDG (osmesa_format, GL_UNSIGNED_BYTE,
current->w, current->h);
if (gl_shadow) {
gl_curformat = osmesa_format;
gl_curwidth = current->w;
gl_curheight = current->h;
} else {
gl_curformat = 0;
gl_curwidth = 0;
gl_curheight = 0;
}
}
return (gl_shadow != NULL);
}
/*--- Conversions routines from shadow buffer to the screen ---*/
static void
CopyShadowNull (_THIS, SDL_Surface * surface)
{
}
static void
CopyShadowDirect (_THIS, SDL_Surface * surface)
{
int y, srcpitch, dstpitch;
Uint8 *srcline, *dstline;
srcline = gl_shadow;
srcpitch = surface->w * gl_pixelsize;
dstline = surface->pixels;
dstpitch = surface->pitch;
if (gl_upsidedown) {
srcline += (surface->h - 1) * srcpitch;
srcpitch = -srcpitch;
}
for (y = 0; y < surface->h; y++) {
SDL_memcpy (dstline, srcline, srcpitch);
srcline += srcpitch;
dstline += dstpitch;
}
}
static void
CopyShadowRGBTo555 (_THIS, SDL_Surface * surface)
{
int x, y, srcpitch, dstpitch;
Uint16 *dstline, *dstcol;
Uint8 *srcline, *srccol;
srcline = (Uint8 *) gl_shadow;
srcpitch = surface->w * gl_pixelsize;
dstline = surface->pixels;
dstpitch = surface->pitch >> 1;
if (gl_upsidedown) {
srcline += (surface->h - 1) * srcpitch;
srcpitch = -srcpitch;
}
for (y = 0; y < surface->h; y++) {
srccol = srcline;
dstcol = dstline;
for (x = 0; x < surface->w; x++) {
Uint16 dstcolor;
dstcolor = ((*srccol++) << 7) & (31 << 10);
dstcolor |= ((*srccol++) << 2) & (31 << 5);
dstcolor |= ((*srccol++) >> 3) & 31;
*dstcol++ = dstcolor;
}
srcline += srcpitch;
dstline += dstpitch;
}
}
static void
CopyShadowRGBTo565 (_THIS, SDL_Surface * surface)
{
int x, y, srcpitch, dstpitch;
Uint16 *dstline, *dstcol;
Uint8 *srcline, *srccol;
srcline = (Uint8 *) gl_shadow;
srcpitch = surface->w * gl_pixelsize;
dstline = surface->pixels;
dstpitch = surface->pitch >> 1;
if (gl_upsidedown) {
srcline += (surface->h - 1) * srcpitch;
srcpitch = -srcpitch;
}
for (y = 0; y < surface->h; y++) {
srccol = srcline;
dstcol = dstline;
for (x = 0; x < surface->w; x++) {
Uint16 dstcolor;
dstcolor = ((*srccol++) << 8) & (31 << 11);
dstcolor |= ((*srccol++) << 3) & (63 << 5);
dstcolor |= ((*srccol++) >> 3) & 31;
*dstcol++ = dstcolor;
}
srcline += srcpitch;
dstline += dstpitch;
}
}
static void
CopyShadowRGBSwap (_THIS, SDL_Surface * surface)
{
int x, y, srcpitch, dstpitch;
Uint8 *dstline, *dstcol;
Uint8 *srcline, *srccol;
srcline = (Uint8 *) gl_shadow;
srcpitch = surface->w * gl_pixelsize;
dstline = surface->pixels;
dstpitch = surface->pitch;
if (gl_upsidedown) {
srcline += (surface->h - 1) * srcpitch;
srcpitch = -srcpitch;
}
for (y = 0; y < surface->h; y++) {
srccol = srcline;
dstcol = dstline;
for (x = 0; x < surface->w; x++) {
*dstcol++ = srccol[2];
*dstcol++ = srccol[1];
*dstcol++ = srccol[0];
srccol += 3;
}
srcline += srcpitch;
dstline += dstpitch;
}
}
static void
CopyShadowRGBToARGB (_THIS, SDL_Surface * surface)
{
int x, y, srcpitch, dstpitch;
Uint32 *dstline, *dstcol;
Uint8 *srcline, *srccol;
srcline = (Uint8 *) gl_shadow;
srcpitch = surface->w * gl_pixelsize;
dstline = surface->pixels;
dstpitch = surface->pitch >> 2;
if (gl_upsidedown) {
srcline += (surface->h - 1) * srcpitch;
srcpitch = -srcpitch;
}
for (y = 0; y < surface->h; y++) {
srccol = srcline;
dstcol = dstline;
for (x = 0; x < surface->w; x++) {
Uint32 dstcolor;
dstcolor = (*srccol++) << 16;
dstcolor |= (*srccol++) << 8;
dstcolor |= *srccol++;
*dstcol++ = dstcolor;
}
srcline += srcpitch;
dstline += dstpitch;
}
}
static void
CopyShadowRGBToABGR (_THIS, SDL_Surface * surface)
{
int x, y, srcpitch, dstpitch;
Uint32 *dstline, *dstcol;
Uint8 *srcline, *srccol;
srcline = (Uint8 *) gl_shadow;
srcpitch = surface->w * gl_pixelsize;
dstline = surface->pixels;
dstpitch = surface->pitch >> 2;
if (gl_upsidedown) {
srcline += (surface->h - 1) * srcpitch;
srcpitch = -srcpitch;
}
for (y = 0; y < surface->h; y++) {
srccol = srcline;
dstcol = dstline;
for (x = 0; x < surface->w; x++) {
Uint32 dstcolor;
dstcolor = *srccol++;
dstcolor |= (*srccol++) << 8;
dstcolor |= (*srccol++) << 16;
*dstcol++ = dstcolor;
}
srcline += srcpitch;
dstline += dstpitch;
}
}
static void
CopyShadowRGBToBGRA (_THIS, SDL_Surface * surface)
{
int x, y, srcpitch, dstpitch;
Uint32 *dstline, *dstcol;
Uint8 *srcline, *srccol;
srcline = (Uint8 *) gl_shadow;
srcpitch = surface->w * gl_pixelsize;
dstline = surface->pixels;
dstpitch = surface->pitch >> 2;
if (gl_upsidedown) {
srcline += (surface->h - 1) * srcpitch;
srcpitch = -srcpitch;
}
for (y = 0; y < surface->h; y++) {
srccol = srcline;
dstcol = dstline;
for (x = 0; x < surface->w; x++) {
Uint32 dstcolor;
dstcolor = (*srccol++) << 8;
dstcolor |= (*srccol++) << 16;
dstcolor |= (*srccol++) << 24;
*dstcol++ = dstcolor;
}
srcline += srcpitch;
dstline += dstpitch;
}
}
static void
CopyShadowRGBToRGBA (_THIS, SDL_Surface * surface)
{
int x, y, srcpitch, dstpitch;
Uint32 *dstline, *dstcol;
Uint8 *srcline, *srccol;
srcline = (Uint8 *) gl_shadow;
srcpitch = surface->w * gl_pixelsize;
dstline = surface->pixels;
dstpitch = surface->pitch >> 2;
if (gl_upsidedown) {
srcline += (surface->h - 1) * srcpitch;
srcpitch = -srcpitch;
}
for (y = 0; y < surface->h; y++) {
srccol = srcline;
dstcol = dstline;
for (x = 0; x < surface->w; x++) {
Uint32 dstcolor;
dstcolor = (*srccol++) << 24;
dstcolor |= (*srccol++) << 16;
dstcolor |= (*srccol++) << 8;
*dstcol++ = dstcolor;
}
srcline += srcpitch;
dstline += dstpitch;
}
}
static void
CopyShadow8888To555 (_THIS, SDL_Surface * surface)
{
int x, y, srcpitch, dstpitch;
Uint16 *dstline, *dstcol;
Uint32 *srcline, *srccol;
srcline = (Uint32 *) gl_shadow;
srcpitch = (surface->w * gl_pixelsize) >> 2;
dstline = surface->pixels;
dstpitch = surface->pitch >> 1;
if (gl_upsidedown) {
srcline += (surface->h - 1) * srcpitch;
srcpitch = -srcpitch;
}
for (y = 0; y < surface->h; y++) {
srccol = srcline;
dstcol = dstline;
for (x = 0; x < surface->w; x++) {
Uint32 srccolor;
Uint16 dstcolor;
srccolor = *srccol++;
dstcolor = (srccolor >> 9) & (31 << 10);
dstcolor |= (srccolor >> 6) & (31 << 5);
dstcolor |= (srccolor >> 3) & 31;
*dstcol++ = dstcolor;
}
srcline += srcpitch;
dstline += dstpitch;
}
}