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//-----------------------------------------------------------------------------
//
// ImageLib Sources
// Copyright (C) 2002 by Denton Woods
// Copyright (C) 2002 Nelson Rush.
// Last modified: 05/18/2002
//
// Filename: src-ILUT/src/ilut_sdlsurface.c
//
// Description: SDL Surface functions for images
//
//-----------------------------------------------------------------------------
#include "ilut_internal.h"
#ifdef ILUT_USE_SDL
#include <SDL.h>
//#include "endian.h"
#ifdef _MSC_VER
#pragma comment(lib, "sdl.lib")
#endif//_MSC_VER
int isBigEndian;
int rmask, gmask, bmask, amask;
void InitSDL()
{
//#if SDL_BYTEORDER == SDL_BIG_ENDIAN
#ifdef __BIG_ENDIAN__
isBigEndian = 1;
rmask = 0xFF000000;
gmask = 0x00FF0000;
bmask = 0x0000FF00;
amask = 0x000000FF;
#else
isBigEndian = 0;
rmask = 0x000000FF;
gmask = 0x0000FF00;
bmask = 0x00FF0000;
amask = 0xFF000000;
#endif
return;
}
//ILboolean ilConvertPal(ILenum DestFormat);
//ILpal *Pal;
// Does not account for converting luminance...
SDL_Surface *ILAPIENTRY ilutConvertToSDLSurface(unsigned int flags)
{
SDL_Surface *Bitmap = NULL;
ILuint i = 0, Pad, BppPal;
ILubyte *Dest, *Data;
ILimage *Image;
Image = ilutCurImage = ilGetCurImage();
if (ilutCurImage == NULL) {
ilSetError(ILUT_ILLEGAL_OPERATION);
return NULL;
}
InitSDL();
// Should be IL_BGR(A).
if (ilutCurImage->Format == IL_RGB || ilutCurImage->Format == IL_RGBA) {
if (!isBigEndian) {
//iluSwapColours(); // No need to swap colors. Just use the bitmasks.
rmask = 0x00FF0000;
gmask = 0x0000FF00;
bmask = 0x000000FF;
}
}
else if (ilutCurImage->Format == IL_BGR || ilutCurImage->Format == IL_BGRA) {
if (isBigEndian) {
rmask = 0x0000FF00;
gmask = 0x00FF0000;
bmask = 0xFF000000;
}
}
else if (Image->Format != IL_COLOR_INDEX) { // We have to convert the image.
#ifdef __BIG_ENDIAN__
Image = iConvertImage(Image, IL_RGBA, IL_UNSIGNED_BYTE);
#else
Image = iConvertImage(Image, IL_BGRA, IL_UNSIGNED_BYTE);
#endif
if (Image == NULL)
return NULL;
}
if (Image->Type != IL_UNSIGNED_BYTE) {
// We do not have to worry about Image != iCurImage at this point, because if it was converted,
// it was converted to a type of unsigned byte.
Image = iConvertImage(Image, Image->Format, IL_UNSIGNED_BYTE);
if (Image == NULL)
return NULL;
}
Data = Image->Data;
if (Image->Origin == IL_ORIGIN_LOWER_LEFT) {
Data = iGetFlipped(Image);
if (Data == NULL)
goto done;
}
Bitmap = SDL_CreateRGBSurface(flags, Image->Width, Image->Height, Image->Bpp * 8,
rmask,gmask,bmask,amask);
if (Bitmap == NULL)
goto done;
if (SDL_MUSTLOCK(Bitmap))
SDL_LockSurface(Bitmap);
Pad = Bitmap->pitch - Image->Bps;
if (Pad == 0) {
memcpy(Bitmap->pixels, Data, Image->SizeOfData);
}
else { // Must pad the lines on some images.
Dest = Bitmap->pixels;
for (i = 0; i < Image->Height; i++) {
memcpy(Dest, Data + i * Image->Bps, Image->Bps);
imemclear(Dest + Image->Bps, Pad);
Dest += Bitmap->pitch;
}
}
if (SDL_MUSTLOCK(Bitmap))
SDL_UnlockSurface(Bitmap);
if (Image->Format == IL_COLOR_INDEX) {
BppPal = ilGetBppPal(Image->Pal.PalType);
switch (ilutCurImage->Pal.PalType)
{
case IL_PAL_RGB24:
case IL_PAL_RGB32:
case IL_PAL_RGBA32:
for (i = 0; i < ilutCurImage->Pal.PalSize / BppPal; i++) {
(Bitmap->format)->palette->colors[i].r = ilutCurImage->Pal.Palette[i*BppPal+0];
(Bitmap->format)->palette->colors[i].g = ilutCurImage->Pal.Palette[i*BppPal+1];
(Bitmap->format)->palette->colors[i].b = ilutCurImage->Pal.Palette[i*BppPal+2];
(Bitmap->format)->palette->colors[i].unused = 0xFF;
}
break;
case IL_PAL_BGR24:
case IL_PAL_BGR32:
case IL_PAL_BGRA32:
for (i = 0; i < ilutCurImage->Pal.PalSize / BppPal; i++) {
(Bitmap->format)->palette->colors[i].b = ilutCurImage->Pal.Palette[i*BppPal+0];
(Bitmap->format)->palette->colors[i].g = ilutCurImage->Pal.Palette[i*BppPal+1];
(Bitmap->format)->palette->colors[i].r = ilutCurImage->Pal.Palette[i*BppPal+2];
(Bitmap->format)->palette->colors[i].unused = 0xFF;
}
break;
default:
ilSetError(IL_INTERNAL_ERROR); // Do anything else?
}
}
done:
if (Data != Image->Data)
ifree(Data); // This is flipped data.
if (Image != ilutCurImage)
ilCloseImage(Image); // This is a converted image.
return Bitmap; // This is NULL if there was an error.
}
#ifndef _WIN32_WCE
SDL_Surface* ILAPIENTRY ilutSDLSurfaceLoadImage(ILstring FileName)
{
SDL_Surface *Surface;
iBindImageTemp();
if (!ilLoadImage(FileName)) {
return NULL;
}
Surface = ilutConvertToSDLSurface(SDL_SWSURFACE);
return Surface;
}
#endif//_WIN32_WCE
// Unfinished
ILboolean ILAPIENTRY ilutSDLSurfaceFromBitmap(SDL_Surface *Bitmap)
{
ilutCurImage = ilGetCurImage();
if (ilutCurImage == NULL) {
ilSetError(ILUT_ILLEGAL_OPERATION);
return IL_FALSE;
}
if (Bitmap == NULL || Bitmap->w == 0 || Bitmap->h == 0) {
ilSetError(ILUT_INVALID_PARAM);
return IL_FALSE;
}
if (!ilTexImage(Bitmap->w, Bitmap->h, 1, 3, IL_RGB, IL_UNSIGNED_BYTE, NULL))
return IL_FALSE;
return IL_TRUE;
}
#endif//ILUT_USE_SDL
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