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SDL_bmp.c: restore most of the original formatting.

This commit is contained in:
Ozkan Sezer 2019-09-02 12:35:00 +03:00
parent 847bd8d983
commit b21338eb54
1 changed files with 156 additions and 156 deletions
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312
src/video/SDL_bmp.c
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@ -71,15 +71,15 @@ static int readRlePixels(SDL_Surface * surface, SDL_RWops * src, int isRle8)
#define COPY_PIXEL(x) spot = &bits[ofs++]; if(spot >= start && spot < end) *spot = (x)
for (;;) {
if ( !SDL_RWread(src, &ch, 1, 1) ) return 1;
if (!SDL_RWread(src, &ch, 1, 1)) return 1;
/*
| encoded mode starts with a run length, and then a byte
| with two colour indexes to alternate between for the run
*/
if ( ch ) {
if (ch) {
Uint8 pixel;
if ( !SDL_RWread(src, &pixel, 1, 1) ) return 1;
if ( isRle8 ) { /* 256-color bitmap, compressed */
if (!SDL_RWread(src, &pixel, 1, 1)) return 1;
if (isRle8) { /* 256-color bitmap, compressed */
do {
COPY_PIXEL(pixel);
} while (--ch);
@ -99,7 +99,7 @@ static int readRlePixels(SDL_Surface * surface, SDL_RWops * src, int isRle8)
| a cursor move, or some absolute data.
| zero tag may be absolute mode or an escape
*/
if ( !SDL_RWread(src, &ch, 1, 1) ) return 1;
if (!SDL_RWread(src, &ch, 1, 1)) return 1;
switch (ch) {
case 0: /* end of line */
ofs = 0;
@ -108,24 +108,24 @@ static int readRlePixels(SDL_Surface * surface, SDL_RWops * src, int isRle8)
case 1: /* end of bitmap */
return 0; /* success! */
case 2: /* delta */
if ( !SDL_RWread(src, &ch, 1, 1) ) return 1;
if (!SDL_RWread(src, &ch, 1, 1)) return 1;
ofs += ch;
if ( !SDL_RWread(src, &ch, 1, 1) ) return 1;
if (!SDL_RWread(src, &ch, 1, 1)) return 1;
bits -= (ch * pitch);
break;
default: /* no compression */
if (isRle8) {
needsPad = ( ch & 1 );
needsPad = (ch & 1);
do {
Uint8 pixel;
if ( !SDL_RWread(src, &pixel, 1, 1) ) return 1;
if (!SDL_RWread(src, &pixel, 1, 1)) return 1;
COPY_PIXEL(pixel);
} while (--ch);
} else {
needsPad = ( ((ch+1)>>1) & 1 ); /* (ch+1)>>1: bytes size */
needsPad = (((ch+1)>>1) & 1); /* (ch+1)>>1: bytes size */
for (;;) {
Uint8 pixel;
if ( !SDL_RWread(src, &pixel, 1, 1) ) return 1;
if (!SDL_RWread(src, &pixel, 1, 1)) return 1;
COPY_PIXEL(pixel >> 4);
if (!--ch) break;
COPY_PIXEL(pixel & 0x0F);
@ -133,7 +133,7 @@ static int readRlePixels(SDL_Surface * surface, SDL_RWops * src, int isRle8)
}
}
/* pad at even boundary */
if ( needsPad && !SDL_RWread(src, &ch, 1, 1) ) return 1;
if (needsPad && !SDL_RWread(src, &ch, 1, 1)) return 1;
break;
}
}
@ -191,7 +191,7 @@ SDL_LoadBMP_RW(SDL_RWops * src, int freesrc)
SDL_bool correctAlpha = SDL_FALSE;
/* The Win32 BMP file header (14 bytes) */
char magic[2];
char magic[2];
Uint32 bfSize;
Uint16 bfReserved1;
Uint16 bfReserved2;
@ -213,7 +213,7 @@ SDL_LoadBMP_RW(SDL_RWops * src, int freesrc)
/* Make sure we are passed a valid data source */
surface = NULL;
was_error = SDL_FALSE;
if ( src == NULL ) {
if (src == NULL) {
was_error = SDL_TRUE;
goto done;
}
@ -221,12 +221,12 @@ SDL_LoadBMP_RW(SDL_RWops * src, int freesrc)
/* Read in the BMP file header */
fp_offset = SDL_RWtell(src);
SDL_ClearError();
if ( SDL_RWread(src, magic, 1, 2) != 2 ) {
if (SDL_RWread(src, magic, 1, 2) != 2) {
SDL_Error(SDL_EFREAD);
was_error = SDL_TRUE;
goto done;
}
if ( SDL_strncmp(magic, "BM", 2) != 0 ) {
if (SDL_strncmp(magic, "BM", 2) != 0) {
SDL_SetError("File is not a Windows BMP file");
was_error = SDL_TRUE;
goto done;
@ -237,30 +237,30 @@ SDL_LoadBMP_RW(SDL_RWops * src, int freesrc)
bfOffBits = SDL_ReadLE32(src);
/* Read the Win32 BITMAPINFOHEADER */
biSize = SDL_ReadLE32(src);
if ( biSize == 12 ) { /* really old BITMAPCOREHEADER */
biWidth = (Uint32)SDL_ReadLE16(src);
biHeight = (Uint32)SDL_ReadLE16(src);
biPlanes = SDL_ReadLE16(src);
biBitCount = SDL_ReadLE16(src);
biCompression = BI_RGB;
biSize = SDL_ReadLE32(src);
if (biSize == 12) { /* really old BITMAPCOREHEADER */
biWidth = (Uint32) SDL_ReadLE16(src);
biHeight = (Uint32) SDL_ReadLE16(src);
biPlanes = SDL_ReadLE16(src);
biBitCount = SDL_ReadLE16(src);
biCompression = BI_RGB;
biSizeImage = 0;
biXPelsPerMeter = 0;
biYPelsPerMeter = 0;
biClrUsed = 0;
biClrImportant = 0;
biClrUsed = 0;
biClrImportant = 0;
} else if (biSize >= 40) { /* some version of BITMAPINFOHEADER */
Uint32 headerSize;
biWidth = SDL_ReadLE32(src);
biHeight = SDL_ReadLE32(src);
biPlanes = SDL_ReadLE16(src);
biBitCount = SDL_ReadLE16(src);
biCompression = SDL_ReadLE32(src);
biWidth = SDL_ReadLE32(src);
biHeight = SDL_ReadLE32(src);
biPlanes = SDL_ReadLE16(src);
biBitCount = SDL_ReadLE16(src);
biCompression = SDL_ReadLE32(src);
biSizeImage = SDL_ReadLE32(src);
biXPelsPerMeter = SDL_ReadLE32(src);
biYPelsPerMeter = SDL_ReadLE32(src);
biClrUsed = SDL_ReadLE32(src);
biClrImportant = SDL_ReadLE32(src);
biClrUsed = SDL_ReadLE32(src);
biClrImportant = SDL_ReadLE32(src);
/* 64 == BITMAPCOREHEADER2, an incompatible OS/2 2.x extension. Skip this stuff for now. */
if (biSize != 64) {
@ -326,81 +326,82 @@ SDL_LoadBMP_RW(SDL_RWops * src, int freesrc)
/* Expand 1 and 4 bit bitmaps to 8 bits per pixel */
switch (biBitCount) {
case 1:
case 4:
ExpandBMP = biBitCount;
biBitCount = 8;
break;
case 2:
case 3:
case 5:
case 6:
case 7:
SDL_SetError("%d-bpp BMP images are not supported", biBitCount);
was_error = SDL_TRUE;
goto done;
default:
ExpandBMP = 0;
break;
case 1:
case 4:
ExpandBMP = biBitCount;
biBitCount = 8;
break;
case 2:
case 3:
case 5:
case 6:
case 7:
SDL_SetError("%d-bpp BMP images are not supported", biBitCount);
was_error = SDL_TRUE;
goto done;
default:
ExpandBMP = 0;
break;
}
/* RLE4 and RLE8 BMP compression is supported */
switch (biCompression) {
case BI_RGB:
/* If there are no masks, use the defaults */
SDL_assert(!haveRGBMasks);
SDL_assert(!haveAlphaMask);
/* Default values for the BMP format */
switch (biBitCount) {
case 15:
case 16:
Rmask = 0x7C00;
Gmask = 0x03E0;
Bmask = 0x001F;
break;
case 24:
#if SDL_BYTEORDER == SDL_BIG_ENDIAN
Rmask = 0x000000FF;
Gmask = 0x0000FF00;
Bmask = 0x00FF0000;
#else
Rmask = 0x00FF0000;
Gmask = 0x0000FF00;
Bmask = 0x000000FF;
#endif
break;
case 32:
/* We don't know if this has alpha channel or not */
correctAlpha = SDL_TRUE;
Amask = 0xFF000000;
Rmask = 0x00FF0000;
Gmask = 0x0000FF00;
Bmask = 0x000000FF;
break;
default:
break;
}
case BI_RGB:
/* If there are no masks, use the defaults */
SDL_assert(!haveRGBMasks);
SDL_assert(!haveAlphaMask);
/* Default values for the BMP format */
switch (biBitCount) {
case 15:
case 16:
Rmask = 0x7C00;
Gmask = 0x03E0;
Bmask = 0x001F;
break;
case 24:
#if SDL_BYTEORDER == SDL_BIG_ENDIAN
Rmask = 0x000000FF;
Gmask = 0x0000FF00;
Bmask = 0x00FF0000;
#else
Rmask = 0x00FF0000;
Gmask = 0x0000FF00;
Bmask = 0x000000FF;
#endif
break;
case 32:
/* We don't know if this has alpha channel or not */
correctAlpha = SDL_TRUE;
Amask = 0xFF000000;
Rmask = 0x00FF0000;
Gmask = 0x0000FF00;
Bmask = 0x000000FF;
break;
case BI_BITFIELDS:
break; /* we handled this in the info header. */
default:
break;
}
break;
case BI_BITFIELDS:
break; /* we handled this in the info header. */
default:
break;
}
/* Create a compatible surface, note that the colors are RGB ordered */
surface = SDL_CreateRGBSurface(0,
biWidth, biHeight, biBitCount, Rmask, Gmask, Bmask, Amask);
if ( surface == NULL ) {
surface =
SDL_CreateRGBSurface(0, biWidth, biHeight, biBitCount, Rmask, Gmask,
Bmask, Amask);
if (surface == NULL) {
was_error = SDL_TRUE;
goto done;
}
/* Load the palette, if any */
palette = (surface->format)->palette;
if ( palette ) {
if ( SDL_RWseek(src, fp_offset+14+biSize, RW_SEEK_SET) < 0 ) {
if (palette) {
if (SDL_RWseek(src, fp_offset+14+biSize, RW_SEEK_SET) < 0) {
SDL_Error(SDL_EFSEEK);
was_error = SDL_TRUE;
goto done;
@ -410,18 +411,18 @@ SDL_LoadBMP_RW(SDL_RWops * src, int freesrc)
| guich: always use 1<<bpp b/c some bitmaps can bring wrong information
| for colorsUsed
*/
/* if ( biClrUsed == 0 ) { */
/* if (biClrUsed == 0) { */
biClrUsed = 1 << biBitCount;
/* } */
if ( biSize == 12 ) {
for ( i = 0; i < (int)biClrUsed; ++i ) {
if (biSize == 12) {
for (i = 0; i < (int) biClrUsed; ++i) {
SDL_RWread(src, &palette->colors[i].b, 1, 1);
SDL_RWread(src, &palette->colors[i].g, 1, 1);
SDL_RWread(src, &palette->colors[i].r, 1, 1);
palette->colors[i].a = SDL_ALPHA_OPAQUE;
}
} else {
for ( i = 0; i < (int)biClrUsed; ++i ) {
for (i = 0; i < (int) biClrUsed; ++i) {
SDL_RWread(src, &palette->colors[i].b, 1, 1);
SDL_RWread(src, &palette->colors[i].g, 1, 1);
SDL_RWread(src, &palette->colors[i].r, 1, 1);
@ -438,7 +439,7 @@ SDL_LoadBMP_RW(SDL_RWops * src, int freesrc)
}
/* Read the surface pixels. Note that the bmp image is upside down */
if ( SDL_RWseek(src, fp_offset+bfOffBits, RW_SEEK_SET) < 0 ) {
if (SDL_RWseek(src, fp_offset + bfOffBits, RW_SEEK_SET) < 0) {
SDL_Error(SDL_EFSEEK);
was_error = SDL_TRUE;
goto done;
@ -451,33 +452,32 @@ SDL_LoadBMP_RW(SDL_RWops * src, int freesrc)
top = (Uint8 *)surface->pixels;
end = (Uint8 *)surface->pixels+(surface->h*surface->pitch);
switch (ExpandBMP) {
case 1:
bmpPitch = (biWidth + 7) >> 3;
pad = (((bmpPitch)%4) ? (4-((bmpPitch)%4)) : 0);
break;
case 4:
bmpPitch = (biWidth + 1) >> 1;
pad = (((bmpPitch)%4) ? (4-((bmpPitch)%4)) : 0);
break;
default:
pad = ((surface->pitch%4) ?
(4-(surface->pitch%4)) : 0);
break;
case 1:
bmpPitch = (biWidth + 7) >> 3;
pad = (((bmpPitch) % 4) ? (4 - ((bmpPitch) % 4)) : 0);
break;
case 4:
bmpPitch = (biWidth + 1) >> 1;
pad = (((bmpPitch) % 4) ? (4 - ((bmpPitch) % 4)) : 0);
break;
default:
pad = ((surface->pitch % 4) ? (4 - (surface->pitch % 4)) : 0);
break;
}
if ( topDown ) {
if (topDown) {
bits = top;
} else {
bits = end - surface->pitch;
}
while ( bits >= top && bits < end ) {
while (bits >= top && bits < end) {
switch (ExpandBMP) {
case 1:
case 4: {
case 1:
case 4:{
Uint8 pixel = 0;
int shift = (8-ExpandBMP);
for ( i=0; i<surface->w; ++i ) {
if ( i%(8/ExpandBMP) == 0 ) {
if ( !SDL_RWread(src, &pixel, 1, 1) ) {
int shift = (8 - ExpandBMP);
for (i = 0; i < surface->w; ++i) {
if (i % (8 / ExpandBMP) == 0) {
if (!SDL_RWread(src, &pixel, 1, 1)) {
SDL_SetError("Error reading from BMP");
was_error = SDL_TRUE;
goto done;
@ -494,51 +494,51 @@ SDL_LoadBMP_RW(SDL_RWops * src, int freesrc)
}
break;
default:
if ( SDL_RWread(src, bits, 1, surface->pitch) != surface->pitch ) {
SDL_Error(SDL_EFREAD);
was_error = SDL_TRUE;
goto done;
}
if (biBitCount == 8 && palette && biClrUsed < (1 << biBitCount)) {
for (i = 0; i < surface->w; ++i) {
if (bits[i] >= biClrUsed) {
SDL_SetError("A BMP image contains a pixel with a color out of the palette");
was_error = SDL_TRUE;
goto done;
}
default:
if (SDL_RWread(src, bits, 1, surface->pitch) != surface->pitch) {
SDL_Error(SDL_EFREAD);
was_error = SDL_TRUE;
goto done;
}
if (biBitCount == 8 && palette && biClrUsed < (1u << biBitCount)) {
for (i = 0; i < surface->w; ++i) {
if (bits[i] >= biClrUsed) {
SDL_SetError("A BMP image contains a pixel with a color out of the palette");
was_error = SDL_TRUE;
goto done;
}
}
}
#if SDL_BYTEORDER == SDL_BIG_ENDIAN
/* Byte-swap the pixels if needed. Note that the 24bpp
case has already been taken care of above. */
switch(biBitCount) {
case 15:
case 16: {
Uint16 *pix = (Uint16 *)bits;
for(i = 0; i < surface->w; i++)
pix[i] = SDL_Swap16(pix[i]);
break;
}
case 32: {
Uint32 *pix = (Uint32 *)bits;
for(i = 0; i < surface->w; i++)
pix[i] = SDL_Swap32(pix[i]);
break;
}
/* Byte-swap the pixels if needed. Note that the 24bpp
case has already been taken care of above. */
switch (biBitCount) {
case 15:
case 16:{
Uint16 *pix = (Uint16 *) bits;
for (i = 0; i < surface->w; i++)
pix[i] = SDL_Swap16(pix[i]);
break;
}
case 32:{
Uint32 *pix = (Uint32 *) bits;
for (i = 0; i < surface->w; i++)
pix[i] = SDL_Swap32(pix[i]);
break;
}
}
#endif
break;
break;
}
/* Skip padding bytes, ugh */
if ( pad ) {
if (pad) {
Uint8 padbyte;
for ( i=0; i<pad; ++i ) {
for (i = 0; i < pad; ++i) {
SDL_RWread(src, &padbyte, 1, 1);
}
}
if ( topDown ) {
if (topDown) {
bits += surface->pitch;
} else {
bits -= surface->pitch;
@ -547,20 +547,20 @@ SDL_LoadBMP_RW(SDL_RWops * src, int freesrc)
if (correctAlpha) {
CorrectAlphaChannel(surface);
}
done:
if ( was_error ) {
if ( src ) {
done:
if (was_error) {
if (src) {
SDL_RWseek(src, fp_offset, RW_SEEK_SET);
}
if ( surface ) {
if (surface) {
SDL_FreeSurface(surface);
}
surface = NULL;
}
if ( freesrc && src ) {
if (freesrc && src) {
SDL_RWclose(src);
}
return(surface);
return (surface);
}
int