Glenn Maynard
b44f1404ce
Most of SDL_utils is moved to RageSurfaceUtils, and does not require SDL; SDL_utils is now only utils that actually need SDL. (My goal isn't to eliminate SDL; it's to make it a back-end library, that can be disabled on some platforms, rather than a required library as it is now.)
995 lines
29 KiB
C++
995 lines
29 KiB
C++
#include "global.h"
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#include "RageSurfaceUtils.h"
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#include "RageSurface.h"
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#include "RageUtil.h"
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#include "RageFile.h"
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uint32_t RageSurfaceUtils::decodepixel( const uint8_t *p, int bpp )
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{
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switch(bpp)
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{
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case 1: return *p;
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case 2: return *(uint16_t *)p;
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case 3:
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if( BYTE_ORDER == BIG_ENDIAN )
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return p[0] << 16 | p[1] << 8 | p[2];
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else
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return p[0] | p[1] << 8 | p[2] << 16;
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case 4: return *(uint32_t *)p;
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default: return 0; /* shouldn't happen, but avoids warnings */
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}
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}
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void RageSurfaceUtils::encodepixel( uint8_t *p, int bpp, uint32_t pixel )
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{
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switch(bpp)
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{
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case 1: *p = uint8_t(pixel); break;
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case 2: *(uint16_t *)p = uint16_t(pixel); break;
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case 3:
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if( BYTE_ORDER == BIG_ENDIAN )
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{
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p[0] = uint8_t((pixel >> 16) & 0xff);
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p[1] = uint8_t((pixel >> 8) & 0xff);
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p[2] = uint8_t(pixel & 0xff);
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} else {
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p[0] = uint8_t(pixel & 0xff);
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p[1] = uint8_t((pixel >> 8) & 0xff);
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p[2] = uint8_t((pixel >> 16) & 0xff);
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}
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break;
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case 4: *(uint32_t *)p = pixel; break;
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}
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}
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/* Get and set colors without scaling to 0..255. */
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void RageSurfaceUtils::GetRawRGBAV( uint32_t pixel, const RageSurfaceFormat &fmt, uint8_t *v )
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{
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if( fmt.BytesPerPixel == 1 )
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{
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v[0] = fmt.palette->colors[pixel].r;
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v[1] = fmt.palette->colors[pixel].g;
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v[2] = fmt.palette->colors[pixel].b;
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v[3] = fmt.palette->colors[pixel].a;
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} else {
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v[0] = uint8_t((pixel & fmt.Rmask) >> fmt.Rshift);
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v[1] = uint8_t((pixel & fmt.Gmask) >> fmt.Gshift);
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v[2] = uint8_t((pixel & fmt.Bmask) >> fmt.Bshift);
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v[3] = uint8_t((pixel & fmt.Amask) >> fmt.Ashift);
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}
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}
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void RageSurfaceUtils::GetRawRGBAV( const uint8_t *p, const RageSurfaceFormat &fmt, uint8_t *v )
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{
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uint32_t pixel = decodepixel( p, fmt.BytesPerPixel );
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GetRawRGBAV( pixel, fmt, v );
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}
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void RageSurfaceUtils::GetRGBAV( uint32_t pixel, const RageSurface *src, uint8_t *v )
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{
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GetRawRGBAV(pixel, src->fmt, v);
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const RageSurfaceFormat *fmt = src->format;
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v[0] = v[0] << fmt->Rloss;
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v[1] = v[1] << fmt->Gloss;
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v[2] = v[2] << fmt->Bloss;
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// Correct for surfaces that don't have an alpha channel.
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if( fmt->Aloss == 8)
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v[3] = 255;
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else
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v[3] = v[3] << fmt->Aloss;
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}
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void RageSurfaceUtils::GetRGBAV( const uint8_t *p, const RageSurface *src, uint8_t *v )
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{
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uint32_t pixel = decodepixel(p, src->format->BytesPerPixel);
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if( src->format->BytesPerPixel == 1 ) // paletted
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{
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memcpy( v, &src->format->palette->colors[pixel], sizeof(RageSurfaceColor));
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}
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else // RGBA
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GetRGBAV(pixel, src, v);
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}
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/* Inverse of GetRawRGBAV. */
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uint32_t RageSurfaceUtils::SetRawRGBAV( const RageSurfaceFormat *fmt, const uint8_t *v )
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{
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return v[0] << fmt->Rshift |
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v[1] << fmt->Gshift |
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v[2] << fmt->Bshift |
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v[3] << fmt->Ashift;
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}
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void RageSurfaceUtils::SetRawRGBAV( uint8_t *p, const RageSurface *src, const uint8_t *v )
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{
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uint32_t pixel = SetRawRGBAV(src->format, v);
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encodepixel(p, src->format->BytesPerPixel, pixel);
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}
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/* Inverse of GetRGBAV. */
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uint32_t RageSurfaceUtils::SetRGBAV( const RageSurfaceFormat *fmt, const uint8_t *v )
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{
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return (v[0] >> fmt->Rloss) << fmt->Rshift |
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(v[1] >> fmt->Gloss) << fmt->Gshift |
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(v[2] >> fmt->Bloss) << fmt->Bshift |
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(v[3] >> fmt->Aloss) << fmt->Ashift;
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}
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void RageSurfaceUtils::SetRGBAV( uint8_t *p, const RageSurface *src, const uint8_t *v )
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{
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uint32_t pixel = SetRGBAV(src->format, v);
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encodepixel(p, src->format->BytesPerPixel, pixel);
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}
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void RageSurfaceUtils::GetBitsPerChannel( const RageSurfaceFormat *fmt, uint32_t bits[4] )
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{
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/* The actual bits stored in each color is 8-loss. */
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bits[0] = 8 - fmt->Rloss;
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bits[1] = 8 - fmt->Gloss;
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bits[2] = 8 - fmt->Bloss;
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bits[3] = 8 - fmt->Aloss;
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}
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void RageSurfaceUtils::CopySurface( RageSurface *src, RageSurface *dest )
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{
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/* Copy the palette, if we have one. */
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if( src->format->BitsPerPixel == 8 && dest->format->BitsPerPixel == 8 )
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{
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ASSERT( dest->format->palette );
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dest->fmt.palette = src->fmt.palette;
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}
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Blit( src, dest, -1, -1, false );
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}
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bool RageSurfaceUtils::ConvertSurface( RageSurface *src, RageSurface *&dst,
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int width, int height, int bpp,
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uint32_t R, uint32_t G, uint32_t B, uint32_t A )
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{
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dst = CreateSurface( width, height, bpp, R, G, B, A );
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/* If the formats are the same, no conversion is needed. */
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if( width == src->w && height == src->h && src->format == dst->format )
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{
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delete dst;
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dst = NULL;
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return false;
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}
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CopySurface( src, dst );
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return true;
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}
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void RageSurfaceUtils::ConvertSurface(RageSurface *&image,
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int width, int height, int bpp,
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uint32_t R, uint32_t G, uint32_t B, uint32_t A)
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{
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RageSurface *ret_image;
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if( !ConvertSurface( image, ret_image, width, height, bpp, R, G, B, A ) )
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return;
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delete image;
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image = ret_image;
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}
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/* Local helper for FixHiddenAlpha. */
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static void FindAlphaRGB(const RageSurface *img, uint8_t &r, uint8_t &g, uint8_t &b, bool reverse)
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{
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r = g = b = 0;
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/* If we have no alpha, there's no alpha color. */
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if( img->format->BitsPerPixel > 8 && !img->format->Amask )
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return;
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/* Eww. Sorry. Iterate front-to-back or in reverse. */
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for(int y = reverse? img->h-1:0;
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reverse? (y >=0):(y < img->h); reverse? (--y):(++y))
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{
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uint8_t *row = (uint8_t *)img->pixels + img->pitch*y;
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if(reverse)
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row += img->format->BytesPerPixel * (img->w-1);
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for(int x = 0; x < img->w; ++x)
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{
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uint32_t val = RageSurfaceUtils::decodepixel(row, img->format->BytesPerPixel);
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if( img->format->BitsPerPixel == 8 )
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{
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if( img->format->palette->colors[val].a )
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{
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/* This color isn't fully transparent, so grab it. */
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r = img->format->palette->colors[val].r;
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g = img->format->palette->colors[val].g;
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b = img->format->palette->colors[val].b;
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return;
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}
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}
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else
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{
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if( val & img->format->Amask )
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{
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/* This color isn't fully transparent, so grab it. */
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img->format->GetRGB( val, &r, &g, &b );
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return;
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}
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}
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if( reverse )
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row -= img->format->BytesPerPixel;
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else
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row += img->format->BytesPerPixel;
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}
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}
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/* Huh? The image is completely transparent. */
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r = g = b = 0;
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}
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/* Local helper for FixHiddenAlpha. Set the underlying RGB values of all pixels in
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* img that are completely transparent. */
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static void SetAlphaRGB(const RageSurface *img, uint8_t r, uint8_t g, uint8_t b)
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{
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/* If it's a paletted surface, all we have to do is change the palette. */
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if( img->format->BitsPerPixel == 8 )
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{
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for( int c = 0; c < img->format->palette->ncolors; ++c )
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{
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if( img->format->palette->colors[c].a )
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continue;
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img->format->palette->colors[c].r = r;
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img->format->palette->colors[c].g = g;
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img->format->palette->colors[c].b = b;
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}
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return;
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}
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/* If it's RGBA and there's no alpha channel, we have nothing to do. */
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if( img->format->BitsPerPixel > 8 && !img->format->Amask )
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return;
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uint32_t trans;
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img->format->MapRGBA( r, g, b, 0, trans );
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for( int y = 0; y < img->h; ++y )
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{
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uint8_t *row = (uint8_t *)img->pixels + img->pitch*y;
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for( int x = 0; x < img->w; ++x )
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{
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uint32_t val = RageSurfaceUtils::decodepixel( row, img->format->BytesPerPixel );
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if( val != trans && !(val&img->format->Amask) )
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{
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RageSurfaceUtils::encodepixel( row, img->format->BytesPerPixel, trans );
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}
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row += img->format->BytesPerPixel;
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}
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}
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}
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/* When we scale up images (which we always do in high res), pixels
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* that are completely transparent can be blended with opaque pixels,
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* causing their RGB elements to show. This is visible in many textures
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* as a pixel-wide border in the wrong color. This is tricky to fix.
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* We need to set the RGB components of completely transparent pixels
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* to a reasonable color.
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*
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* Most images have a single border color. For these, the transparent
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* color is easy: search through the image top-bottom-left-right,
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* find the first non-transparent pixel, and pull out its RGB.
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*
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* A few images don't. We can only make a guess here. What we'll do
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* is, after the above search, do the same in reverse (bottom-top-right-
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* left). If the color we find is different, we'll just set the border
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* color to black.
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*/
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void RageSurfaceUtils::FixHiddenAlpha( RageSurface *img )
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{
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uint8_t r, g, b;
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FindAlphaRGB(img, r, g, b, false);
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uint8_t cr, cg, cb; /* compare */
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FindAlphaRGB(img, cr, cg, cb, true);
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if( cr != r || cg != g || cb != b )
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r = g = b = 0;
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SetAlphaRGB(img, r, g, b);
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}
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/* Find various traits of a surface. Do these all at once, so we only have to
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* iterate the surface once. */
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int RageSurfaceUtils::FindSurfaceTraits( const RageSurface *img )
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{
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const int NEEDS_NO_ALPHA=0, NEEDS_BOOL_ALPHA=1, NEEDS_FULL_ALPHA=2;
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int alpha_type = NEEDS_NO_ALPHA;
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uint32_t max_alpha;
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if( img->format->BitsPerPixel == 8 )
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max_alpha = 0xFF;
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else
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max_alpha = img->format->Amask;
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for(int y = 0; y < img->h; ++y)
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{
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uint8_t *row = (uint8_t *)img->pixels + img->pitch*y;
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for(int x = 0; x < img->w; ++x)
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{
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uint32_t val = decodepixel(row, img->format->BytesPerPixel);
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uint32_t alpha;
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if( img->format->BitsPerPixel == 8 )
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alpha = img->format->palette->colors[val].a;
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else
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alpha = (val & img->format->Amask);
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if( alpha == 0 )
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alpha_type = max( alpha_type, NEEDS_BOOL_ALPHA );
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else if( alpha != max_alpha )
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alpha_type = max( alpha_type, NEEDS_FULL_ALPHA );
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row += img->format->BytesPerPixel;
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}
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}
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int ret = 0;
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switch( alpha_type )
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{
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case NEEDS_NO_ALPHA: ret |= TRAIT_NO_TRANSPARENCY; break;
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case NEEDS_BOOL_ALPHA: ret |= TRAIT_BOOL_TRANSPARENCY; break;
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case NEEDS_FULL_ALPHA: break;
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default: ASSERT(0);
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}
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return ret;
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}
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/* Local helper for BlitTransform. */
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static inline void GetRawRGBAV_XY( const RageSurface *src, uint8_t *v, int x, int y )
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{
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const uint8_t *srcp = (const uint8_t *) src->pixels + (y * src->pitch);
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const uint8_t *srcpx = srcp + (x * src->fmt.BytesPerPixel);
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RageSurfaceUtils::GetRawRGBAV( srcpx, src->fmt, v );
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}
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static inline float scale( float x, float l1, float h1, float l2, float h2 )
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{
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return ((x - l1) / (h1 - l1) * (h2 - l2) + l2);
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}
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/* Completely unoptimized. */
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void RageSurfaceUtils::BlitTransform( const RageSurface *src, RageSurface *dst,
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const float fCoords[8] /* TL, BR, BL, TR */ )
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{
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ASSERT( src->format->BytesPerPixel == dst->format->BytesPerPixel );
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const float Coords[8] = {
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(fCoords[0] * (src->w)), (fCoords[1] * (src->h)),
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(fCoords[2] * (src->w)), (fCoords[3] * (src->h)),
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(fCoords[4] * (src->w)), (fCoords[5] * (src->h)),
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(fCoords[6] * (src->w)), (fCoords[7] * (src->h))
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};
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const int TL_X = 0, TL_Y = 1, BL_X = 2, BL_Y = 3,
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BR_X = 4, BR_Y = 5, TR_X = 6, TR_Y = 7;
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for( int y = 0; y < dst->h; ++y )
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{
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uint8_t *dstp = (uint8_t *) dst->pixels + (y * dst->pitch); /* line */
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uint8_t *dstpx = dstp; /* pixel */
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const float start_y = scale(float(y), 0, float(dst->h), Coords[TL_Y], Coords[BL_Y]);
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const float end_y = scale(float(y), 0, float(dst->h), Coords[TR_Y], Coords[BR_Y]);
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const float start_x = scale(float(y), 0, float(dst->h), Coords[TL_X], Coords[BL_X]);
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const float end_x = scale(float(y), 0, float(dst->h), Coords[TR_X], Coords[BR_X]);
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for( int x = 0; x < dst->w; ++x )
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{
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const float src_xp = scale(float(x), 0, float(dst->w), start_x, end_x);
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const float src_yp = scale(float(x), 0, float(dst->w), start_y, end_y);
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/* If the surface is two pixels wide, src_xp is 0..2. .5 indicates
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* pixel[0]; 1 indicates 50% pixel[0], 50% pixel[1]; 1.5 indicates
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* pixel[1]; 2 indicates 50% pixel[1], 50% pixel[2] (which is clamped
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* to pixel[1]). */
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int src_x[2], src_y[2];
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src_x[0] = (int) truncf(src_xp - 0.5f);
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src_x[1] = src_x[0] + 1;
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src_y[0] = (int) truncf(src_yp - 0.5f);
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src_y[1] = src_y[0] + 1;
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/* Emulate GL_REPEAT. */
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src_x[0] = clamp(src_x[0], 0, src->w);
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src_x[1] = clamp(src_x[1], 0, src->w);
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src_y[0] = clamp(src_y[0], 0, src->h);
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src_y[1] = clamp(src_y[1], 0, src->h);
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/* Decode our four pixels. */
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uint8_t v[4][4];
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GetRawRGBAV_XY(src, v[0], src_x[0], src_y[0]);
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GetRawRGBAV_XY(src, v[1], src_x[0], src_y[1]);
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GetRawRGBAV_XY(src, v[2], src_x[1], src_y[0]);
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GetRawRGBAV_XY(src, v[3], src_x[1], src_y[1]);
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/* Distance from the pixel chosen: */
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float weight_x = src_xp - (src_x[0] + 0.5f);
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float weight_y = src_yp - (src_y[0] + 0.5f);
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/* Filter: */
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uint8_t out[4] = { 0,0,0,0 };
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for(int i = 0; i < 4; ++i)
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{
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float sum = 0;
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sum += v[0][i] * (1-weight_x) * (1-weight_y);
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sum += v[1][i] * (1-weight_x) * (weight_y);
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sum += v[2][i] * (weight_x) * (1-weight_y);
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sum += v[3][i] * (weight_x) * (weight_y);
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out[i] = (uint8_t) clamp( lrintf(sum), 0, 255 );
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}
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/* If the source has no alpha, set the destination to opaque. */
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if( src->format->Amask == 0 )
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out[3] = uint8_t( dst->format->Amask >> dst->format->Ashift );
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SetRawRGBAV(dstpx, dst, out);
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dstpx += dst->format->BytesPerPixel;
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}
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}
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}
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/*
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* Simplified:
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*
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* No source alpha.
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* Palette -> palette blits assume the palette is identical (no mapping).
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* No color key.
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* No general blitting rects.
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*/
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static void blit_same_type( RageSurface *src_surf, const RageSurface *dst_surf, int width, int height )
|
|
{
|
|
const char *src = (const char *) src_surf->pixels;
|
|
const char *dst = (const char *) dst_surf->pixels;
|
|
|
|
/* Bytes to skip at the end of a line. */
|
|
const int srcskip = src_surf->pitch - width*src_surf->format->BytesPerPixel;
|
|
const int dstskip = dst_surf->pitch - width*dst_surf->format->BytesPerPixel;
|
|
|
|
/* XXX: duff's this */
|
|
while( height-- )
|
|
{
|
|
int x = 0;
|
|
while( x++ < width )
|
|
{
|
|
/* (Relatively) fast. */
|
|
switch( src_surf->format->BytesPerPixel )
|
|
{
|
|
case 1: *((uint8_t *)dst) = *((uint8_t *)src); break;
|
|
case 2: *((uint16_t *)dst) = *((uint16_t *)src); break;
|
|
case 3: ((uint8_t *)dst)[0] = ((uint8_t *)src)[0];
|
|
((uint8_t *)dst)[1] = ((uint8_t *)src)[1];
|
|
((uint8_t *)dst)[2] = ((uint8_t *)src)[2];
|
|
break;
|
|
case 4: *((uint32_t *)dst) = *((uint32_t *)src); break;
|
|
}
|
|
|
|
src += src_surf->format->BytesPerPixel;
|
|
dst += dst_surf->format->BytesPerPixel;
|
|
}
|
|
|
|
src += srcskip;
|
|
dst += dstskip;
|
|
}
|
|
}
|
|
|
|
/* Rescaling blit with no ckey. This is used to update movies in
|
|
* D3D, so optimization is very important. */
|
|
static void blit_rgba_to_rgba( RageSurface *src_surf, const RageSurface *dst_surf, int width, int height )
|
|
{
|
|
const char *src = (const char *) src_surf->pixels;
|
|
const char *dst = (const char *) dst_surf->pixels;
|
|
|
|
/* Bytes to skip at the end of a line. */
|
|
const int srcskip = src_surf->pitch - width*src_surf->format->BytesPerPixel;
|
|
const int dstskip = dst_surf->pitch - width*dst_surf->format->BytesPerPixel;
|
|
|
|
uint32_t src_bits[4], dst_bits[4];
|
|
RageSurfaceUtils::GetBitsPerChannel(src_surf->format, src_bits);
|
|
RageSurfaceUtils::GetBitsPerChannel(dst_surf->format, dst_bits);
|
|
|
|
const int rshifts[4] = {
|
|
src_surf->format->Rshift + src_bits[0] - dst_bits[0],
|
|
src_surf->format->Gshift + src_bits[1] - dst_bits[1],
|
|
src_surf->format->Bshift + src_bits[2] - dst_bits[2],
|
|
src_surf->format->Ashift + src_bits[3] - dst_bits[3],
|
|
};
|
|
const int lshifts[4] = {
|
|
dst_surf->format->Rshift,
|
|
dst_surf->format->Gshift,
|
|
dst_surf->format->Bshift,
|
|
dst_surf->format->Ashift,
|
|
};
|
|
|
|
const uint32_t masks[4] = {
|
|
src_surf->format->Rmask,
|
|
src_surf->format->Gmask,
|
|
src_surf->format->Bmask,
|
|
src_surf->format->Amask
|
|
};
|
|
|
|
int ormask = 0;
|
|
if( src_surf->format->Amask == 0 )
|
|
ormask = dst_surf->format->Amask;
|
|
|
|
while( height-- )
|
|
{
|
|
int x = 0;
|
|
while( x++ < width )
|
|
{
|
|
unsigned int pixel = RageSurfaceUtils::decodepixel((uint8_t *) src, src_surf->format->BytesPerPixel);
|
|
|
|
/* Convert pixel to the destination RGBA. */
|
|
unsigned int opixel = 0;
|
|
opixel |= (pixel & masks[0]) >> rshifts[0] << lshifts[0];
|
|
opixel |= (pixel & masks[1]) >> rshifts[1] << lshifts[1];
|
|
opixel |= (pixel & masks[2]) >> rshifts[2] << lshifts[2];
|
|
opixel |= (pixel & masks[3]) >> rshifts[3] << lshifts[3];
|
|
|
|
// Correct surfaces that don't have an alpha channel.
|
|
opixel |= ormask;
|
|
|
|
/* Store it. */
|
|
RageSurfaceUtils::encodepixel((uint8_t *) dst, dst_surf->format->BytesPerPixel, opixel);
|
|
|
|
src += src_surf->format->BytesPerPixel;
|
|
dst += dst_surf->format->BytesPerPixel;
|
|
}
|
|
|
|
src += srcskip;
|
|
dst += dstskip;
|
|
}
|
|
}
|
|
|
|
static void blit_generic( RageSurface *src_surf, const RageSurface *dst_surf, int width, int height )
|
|
{
|
|
const char *src = (const char *) src_surf->pixels;
|
|
const char *dst = (const char *) dst_surf->pixels;
|
|
|
|
/* Bytes to skip at the end of a line. */
|
|
const int srcskip = src_surf->pitch - width*src_surf->format->BytesPerPixel;
|
|
const int dstskip = dst_surf->pitch - width*dst_surf->format->BytesPerPixel;
|
|
|
|
while( height-- )
|
|
{
|
|
int x = 0;
|
|
while( x++ < width )
|
|
{
|
|
unsigned int pixel = RageSurfaceUtils::decodepixel((uint8_t *) src, src_surf->format->BytesPerPixel);
|
|
|
|
uint8_t colors[4];
|
|
/* Convert pixel to the destination RGBA. */
|
|
colors[0] = src_surf->format->palette->colors[pixel].r;
|
|
colors[1] = src_surf->format->palette->colors[pixel].g;
|
|
colors[2] = src_surf->format->palette->colors[pixel].b;
|
|
colors[3] = src_surf->format->palette->colors[pixel].a;
|
|
pixel = RageSurfaceUtils::SetRGBAV(dst_surf->format, colors);
|
|
|
|
/* Store it. */
|
|
RageSurfaceUtils::encodepixel((uint8_t *) dst, dst_surf->format->BytesPerPixel, pixel);
|
|
|
|
src += src_surf->format->BytesPerPixel;
|
|
dst += dst_surf->format->BytesPerPixel;
|
|
}
|
|
|
|
src += srcskip;
|
|
dst += dstskip;
|
|
}
|
|
|
|
}
|
|
|
|
/* Blit src onto dst. */
|
|
void RageSurfaceUtils::Blit( RageSurface *src, RageSurface *dst, int width, int height, bool ckey )
|
|
{
|
|
if(width == -1)
|
|
width = src->w;
|
|
if(height == -1)
|
|
height = src->h;
|
|
width = min(src->w, dst->w);
|
|
height = min(src->h, dst->h);
|
|
|
|
/* Types of blits:
|
|
* RGBA->RGBA, same format without colorkey
|
|
* RGBA->RGBA, same format with colorkey
|
|
* PAL->PAL; ignore colorkey flag
|
|
* RGBA->RGBA different format without colorkey
|
|
* RGBA->RGBA different format with colorkey
|
|
* PAL->RGBA with colorkey
|
|
* PAL->RGBA without colorkey
|
|
*/
|
|
if( src->format->BytesPerPixel == dst->format->BytesPerPixel &&
|
|
src->format->Rmask == dst->format->Rmask &&
|
|
src->format->Gmask == dst->format->Gmask &&
|
|
src->format->Bmask == dst->format->Bmask &&
|
|
src->format->Amask == dst->format->Amask )
|
|
{
|
|
/* RGBA->RGBA with the same format, or PAL->PAL. Simple copy. */
|
|
blit_same_type(src, dst, width, height);
|
|
}
|
|
|
|
else if( src->format->BytesPerPixel != 1 && dst->format->BytesPerPixel != 1 )
|
|
{
|
|
/* RGBA->RGBA with different formats. */
|
|
blit_rgba_to_rgba(src, dst, width, height);
|
|
}
|
|
|
|
else if( src->format->BytesPerPixel == 1 && dst->format->BytesPerPixel != 1 )
|
|
{
|
|
/* PAL->RGBA. */
|
|
blit_generic(src, dst, width, height);
|
|
}
|
|
else
|
|
/* We don't do RGBA->PAL. */
|
|
ASSERT(0);
|
|
|
|
/*
|
|
* The destination surface may be larger than the source. For example, we may be
|
|
* blitting a 200x200 image onto a 256x256 surface for OpenGL. Normally, that extra
|
|
* space isn't actually used; we'll only render the image space. However, bilinear
|
|
* filtering will cause the lines of pixels at 201x... and ...x201 to be visible. We
|
|
* need to make sure those pixels make sense.
|
|
*
|
|
* Previously, we just cleared the image to transparent or the color key. This
|
|
* has two problems. First, we may not have space for a color key (an image with
|
|
* 256 non-transparent palette colors). Second, that's not completely correct;
|
|
* it'll force the outside border of the image to filter to transparent. If the image
|
|
* is being tiled with another image, that may leave seams.
|
|
*
|
|
* (In some cases, filtering to transparent is preferable, particularly when displaying
|
|
* a sprite in perspective. If you want that, add blank space to the image explicitly.)
|
|
*
|
|
* Copy the last column (200x... -> 201x...), then the last row (...x200 -> ...x201).
|
|
*/
|
|
|
|
if( width < dst->w )
|
|
{
|
|
/* Duplicate the last column. */
|
|
int offset = dst->format->BytesPerPixel * (width-1);
|
|
uint8_t *p = (uint8_t *) dst->pixels + offset;
|
|
|
|
for( int y = 0; y < height; ++y )
|
|
{
|
|
uint32_t pixel = decodepixel( p, dst->format->BytesPerPixel );
|
|
encodepixel( p+dst->format->BytesPerPixel, dst->format->BytesPerPixel, pixel );
|
|
|
|
p += dst->pitch;
|
|
}
|
|
}
|
|
|
|
if( height < dst->h )
|
|
{
|
|
/* Duplicate the last row. */
|
|
char *srcp = (char *) dst->pixels;
|
|
srcp += dst->pitch * (height-1);
|
|
memcpy( srcp + dst->pitch, srcp, dst->pitch );
|
|
}
|
|
}
|
|
|
|
struct SurfaceHeader
|
|
{
|
|
int width, height, pitch;
|
|
int Rmask, Gmask, Bmask, Amask;
|
|
int bpp;
|
|
};
|
|
|
|
/* Save and load RageSurfaces to disk, in a very fast, nonportable way. */
|
|
bool RageSurfaceUtils::SaveSurface( RageSurface *img, CString file )
|
|
{
|
|
RageFile f;
|
|
if( !f.Open( file, RageFile::WRITE ) )
|
|
return false;
|
|
|
|
SurfaceHeader h;
|
|
memset( &h, 0, sizeof(h) );
|
|
|
|
h.height = img->h;
|
|
h.width = img->w;
|
|
h.pitch = img->pitch;
|
|
h.Rmask = img->format->Rmask;
|
|
h.Gmask = img->format->Gmask;
|
|
h.Bmask = img->format->Bmask;
|
|
h.Amask = img->format->Amask;
|
|
h.bpp = img->format->BitsPerPixel;
|
|
|
|
f.Write( &h, sizeof(h) );
|
|
|
|
if(h.bpp == 8)
|
|
f.Write( img->format->palette->colors, 256 * sizeof(RageSurfaceColor) );
|
|
|
|
f.Write( img->pixels, img->h * img->pitch );
|
|
|
|
return true;
|
|
}
|
|
|
|
RageSurface *RageSurfaceUtils::LoadSurface( CString file )
|
|
{
|
|
RageFile f;
|
|
if( !f.Open( file ) )
|
|
return false;
|
|
|
|
SurfaceHeader h;
|
|
if( f.Read( &h, sizeof(h) ) != sizeof(h) )
|
|
return NULL;
|
|
|
|
RageSurfaceColor palette[256];
|
|
if(h.bpp == 8)
|
|
if( f.Read( palette, 256 * sizeof(RageSurfaceColor) != 256 * sizeof(RageSurfaceColor) ) )
|
|
return NULL;
|
|
|
|
/* Create the surface. */
|
|
RageSurface *img = CreateSurface( h.width, h.height, h.bpp,
|
|
h.Rmask, h.Gmask, h.Bmask, h.Amask );
|
|
ASSERT( img );
|
|
ASSERT( h.pitch == img->pitch );
|
|
|
|
if( f.Read( img->pixels, h.height * h.pitch ) != h.height * h.pitch )
|
|
{
|
|
delete img;
|
|
return NULL;
|
|
}
|
|
|
|
/* Set the palette. */
|
|
if( h.bpp == 8 )
|
|
memcpy( img->fmt.palette->colors, palette, 256*sizeof(RageSurfaceColor) );
|
|
|
|
return img;
|
|
}
|
|
|
|
/*
|
|
* This converts an image to a special 8-bit paletted format. The palette is set up
|
|
* so that palette indexes look like regular, packed components.
|
|
*
|
|
* For example, an image with 8 bits of grayscale and 0 bits of alpha has a palette
|
|
* that looks like { 0,0,0,255 }, { 1,1,1,255 }, { 2,2,2,255 }, ... { 255,255,255,255 }.
|
|
* This results in index components that can be treated as grayscale values.
|
|
*
|
|
* An image with 2 bits of grayscale and 2 bits of alpha look like
|
|
* { 0,0,0,0 }, { 85,85,85,0 }, { 170,170,170,0 }, { 255,255,255,0 },
|
|
* { 0,0,0,85 }, { 85,85,85,85 }, { 170,170,170,85 }, { 255,255,255,85 }, ...
|
|
*
|
|
* This results in index components that can be pulled apart like regular packed
|
|
* values: the first two bits of the index are the grayscale component, and the next
|
|
* two bits are the alpha component.
|
|
*
|
|
* This gives us a generic way to handle arbitrary 8-bit texture formats.
|
|
*/
|
|
RageSurface *RageSurfaceUtils::Palettize( RageSurface *src_surf, int GrayBits, int AlphaBits )
|
|
{
|
|
AlphaBits = min( AlphaBits, 8-src_surf->format->Aloss );
|
|
|
|
const int TotalBits = GrayBits + AlphaBits;
|
|
ASSERT( TotalBits <= 8 );
|
|
|
|
RageSurface *dst_surf = CreateSurface(src_surf->w, src_surf->h,
|
|
8, 0,0,0,0 );
|
|
|
|
/* Set up the palette. */
|
|
const int TotalColors = 1 << TotalBits;
|
|
const int Ivalues = 1 << GrayBits; // number of intensity values
|
|
const int Ishift = 0; // intensity shift
|
|
const int Imask = ((1 << GrayBits) - 1) << Ishift; // intensity mask
|
|
const int Iloss = 8-GrayBits;
|
|
|
|
const int Avalues = 1 << AlphaBits; // number of alpha values
|
|
const int Ashift = GrayBits; // alpha shift
|
|
const int Amask = ((1 << AlphaBits) - 1) << Ashift; // alpha mask
|
|
const int Aloss = 8-AlphaBits;
|
|
|
|
for( int index = 0; index < TotalColors; ++index )
|
|
{
|
|
const int I = (index & Imask) >> Ishift;
|
|
const int A = (index & Amask) >> Ashift;
|
|
|
|
int ScaledI;
|
|
if( Ivalues == 1 )
|
|
ScaledI = 255; // if only one intensity value, always fullbright
|
|
else
|
|
ScaledI = clamp( int(roundf(I * (255.0f / (Ivalues-1)))), 0, 255 );
|
|
|
|
int ScaledA;
|
|
if( Avalues == 1 )
|
|
ScaledA = 255; // if only one alpha value, always opaque
|
|
else
|
|
ScaledA = clamp( int(roundf(A * (255.0f / (Avalues-1)))), 0, 255 );
|
|
|
|
RageSurfaceColor c;
|
|
c.r = uint8_t(ScaledI);
|
|
c.g = uint8_t(ScaledI);
|
|
c.b = uint8_t(ScaledI);
|
|
c.a = uint8_t(ScaledA);
|
|
|
|
dst_surf->fmt.palette->colors[index] = c;
|
|
}
|
|
|
|
const char *src = (const char *) src_surf->pixels;
|
|
const char *dst = (const char *) dst_surf->pixels;
|
|
|
|
int height = src_surf->h;
|
|
int width = src_surf->w;
|
|
|
|
/* Bytes to skip at the end of a line. */
|
|
const int srcskip = src_surf->pitch - width*src_surf->format->BytesPerPixel;
|
|
const int dstskip = dst_surf->pitch - width*dst_surf->format->BytesPerPixel;
|
|
|
|
while( height-- )
|
|
{
|
|
int x = 0;
|
|
while( x++ < width )
|
|
{
|
|
unsigned int pixel = decodepixel((uint8_t *) src, src_surf->format->BytesPerPixel);
|
|
|
|
uint8_t colors[4];
|
|
GetRGBAV(pixel, src_surf, colors);
|
|
|
|
int Ival = 0;
|
|
Ival += colors[0];
|
|
Ival += colors[1];
|
|
Ival += colors[2];
|
|
Ival /= 3;
|
|
|
|
pixel = (Ival >> Iloss) << Ishift |
|
|
(colors[3] >> Aloss) << Ashift;
|
|
|
|
/* Store it. */
|
|
*((uint8_t *) dst) = uint8_t(pixel);
|
|
|
|
src += src_surf->format->BytesPerPixel;
|
|
dst += dst_surf->format->BytesPerPixel;
|
|
}
|
|
|
|
src += srcskip;
|
|
dst += dstskip;
|
|
}
|
|
|
|
return dst_surf;
|
|
}
|
|
|
|
|
|
RageSurface *RageSurfaceUtils::MakeDummySurface( int height, int width )
|
|
{
|
|
RageSurface *ret_image = CreateSurface( width, height, 8, 0,0,0,0 );
|
|
|
|
RageSurfaceColor pink( 0xFF, 0x10, 0xFF, 0xFF );
|
|
ret_image->fmt.palette->colors[0] = pink;
|
|
|
|
memset( ret_image->pixels, 0, ret_image->h*ret_image->pitch );
|
|
|
|
return ret_image;
|
|
}
|
|
|
|
/* HACK: Some banners and textures have #F800F8 as the color key. Search the edge
|
|
* it; if we find it, use that as the color key. */
|
|
static bool ImageUsesOffHotPink( const RageSurface *img )
|
|
{
|
|
uint32_t OffHotPink;
|
|
if( !img->format->MapRGBA( 0xF8, 0, 0xF8, 0xFF, OffHotPink ) )
|
|
return false;
|
|
|
|
const uint8_t *p = img->pixels;
|
|
for( int x = 0; x < img->w; ++x )
|
|
{
|
|
uint32_t val = RageSurfaceUtils::decodepixel( p, img->format->BytesPerPixel );
|
|
if( val == OffHotPink )
|
|
return true;
|
|
p += img->format->BytesPerPixel;
|
|
}
|
|
|
|
p = img->pixels;
|
|
p += img->pitch * (img->h-1);
|
|
for( int i=0; i < img->w; i++ )
|
|
{
|
|
uint32_t val = RageSurfaceUtils::decodepixel( p, img->format->BytesPerPixel );
|
|
if( val == OffHotPink )
|
|
return true;
|
|
p += img->format->BytesPerPixel;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/* Set #FF00FF and #F800F8 to transparent. img may be reallocated if it has no alpha
|
|
* bits. */
|
|
void RageSurfaceUtils::ApplyHotPinkColorKey( RageSurface *&img )
|
|
{
|
|
if( img->format->BitsPerPixel == 8 )
|
|
{
|
|
uint32_t color;
|
|
if( img->format->MapRGBA( 0xF8, 0, 0xF8, 0xFF, color ) )
|
|
img->format->palette->colors[ color ].a = 0;
|
|
if( img->format->MapRGBA( 0xFF, 0, 0xFF, 0xFF, color ) )
|
|
img->format->palette->colors[ color ].a = 0;
|
|
return;
|
|
}
|
|
|
|
/* RGBA. */
|
|
/* Make sure we have alpha. */
|
|
if( !img->format->Amask )
|
|
{
|
|
/* We don't have any alpha. Try to enable it without copying. */
|
|
int usable_bits = (1<<img->format->BitsPerPixel)-1;
|
|
usable_bits &= ~img->format->Rmask;
|
|
usable_bits &= ~img->format->Gmask;
|
|
usable_bits &= ~img->format->Bmask;
|
|
|
|
for( int i = 0; img->format->Amask == 0 && i < 32; ++i )
|
|
{
|
|
if( usable_bits & (1<<i) )
|
|
{
|
|
img->format->Amask = 1<<i;
|
|
img->format->Aloss = 7;
|
|
img->format->Ashift = (uint8_t) i;
|
|
}
|
|
}
|
|
|
|
if( img->format->Amask == 0 )
|
|
ConvertSurface( img, img->w, img->h,
|
|
32, 0xFF000000, 0x00FF0000, 0x0000FF00, 0x000000FF );
|
|
}
|
|
|
|
uint32_t HotPink;
|
|
|
|
bool bHaveColorKey;
|
|
if( ImageUsesOffHotPink(img) )
|
|
bHaveColorKey = img->format->MapRGBA( 0xF8, 0, 0xF8, 0xFF, HotPink );
|
|
else
|
|
bHaveColorKey = img->format->MapRGBA( 0xFF, 0, 0xFF, 0xFF, HotPink );
|
|
if( !bHaveColorKey )
|
|
return;
|
|
|
|
for( int y = 0; y < img->h; ++y )
|
|
{
|
|
uint8_t *row = (uint8_t *)img->pixels + img->pitch*y;
|
|
|
|
for( int x = 0; x < img->w; ++x )
|
|
{
|
|
uint32_t val = decodepixel( row, img->format->BytesPerPixel );
|
|
if( val == HotPink )
|
|
encodepixel( row, img->format->BytesPerPixel, 0 );
|
|
|
|
row += img->format->BytesPerPixel;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* (c) 2001-2004 Glenn Maynard, Chris Danford
|
|
* All rights reserved.
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a
|
|
* copy of this software and associated documentation files (the
|
|
* "Software"), to deal in the Software without restriction, including
|
|
* without limitation the rights to use, copy, modify, merge, publish,
|
|
* distribute, and/or sell copies of the Software, and to permit persons to
|
|
* whom the Software is furnished to do so, provided that the above
|
|
* copyright notice(s) and this permission notice appear in all copies of
|
|
* the Software and that both the above copyright notice(s) and this
|
|
* permission notice appear in supporting documentation.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
|
|
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
|
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF
|
|
* THIRD PARTY RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR HOLDERS
|
|
* INCLUDED IN THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL INDIRECT
|
|
* OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
|
|
* OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
|
|
* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
|
|
* PERFORMANCE OF THIS SOFTWARE.
|
|
*/
|