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-rw-r--r--core/image.cpp338
1 files changed, 336 insertions, 2 deletions
diff --git a/core/image.cpp b/core/image.cpp
index e5489c06fa..d9ba6c1594 100644
--- a/core/image.cpp
+++ b/core/image.cpp
@@ -1399,10 +1399,344 @@ int Image::get_format_pallete_size(Format p_format) {
}
+
+
+Error Image::_decompress_bc() {
+
+ print_line("decompressing bc");
+
+ int mm;
+ int size = _get_dst_image_size(width,height,FORMAT_RGBA,mm,mipmaps);
+
+ DVector<uint8_t> newdata;
+ newdata.resize(size);
+
+ DVector<uint8_t>::Write w = newdata.write();
+ DVector<uint8_t>::Read r = data.read();
+
+ int rofs=0;
+ int wofs=0;
+ int wd=width,ht=height;
+
+ for(int i=0;i<=mm;i++) {
+
+ switch(format) {
+
+ case FORMAT_BC1: {
+
+ int len = (wd*ht)/16;
+ uint8_t* dst=&w[wofs];
+
+ uint32_t ofs_table[16];
+ for(int x=0;x<4;x++) {
+
+ for(int y=0;y<4;y++) {
+
+ ofs_table[15-(y*4+(3-x))]=(x+y*wd)*4;
+ }
+ }
+
+
+ for(int j=0;j<len;j++) {
+
+ const uint8_t* src=&r[rofs+j*8];
+ uint16_t col_a=src[1];
+ col_a<<=8;
+ col_a|=src[0];
+ uint16_t col_b=src[3];
+ col_b<<=8;
+ col_b|=src[2];
+
+ uint8_t table[4][4]={
+ { (col_a>>11)<<3, ((col_a>>5)&0x3f)<<2, ((col_a)&0x1f)<<3, 255 },
+ { (col_b>>11)<<3, ((col_b>>5)&0x3f)<<2, ((col_b)&0x1f)<<3, 255 },
+ {0,0,0,255},
+ {0,0,0,255}
+ };
+
+ if (col_a<col_b) {
+ //punchrough
+ table[2][0]=(int(table[0][0])+int(table[1][0]))>>1;
+ table[2][1]=(int(table[0][1])+int(table[1][1]))>>1;
+ table[2][2]=(int(table[0][2])+int(table[1][2]))>>1;
+ table[3][3]=0; //premul alpha black
+ } else {
+ //gradient
+ table[2][0]=(int(table[0][0])*2+int(table[1][0]))/3;
+ table[2][1]=(int(table[0][1])*2+int(table[1][1]))/3;
+ table[2][2]=(int(table[0][2])*2+int(table[1][2]))/3;
+ table[3][0]=(int(table[0][0])+int(table[1][0])*2)/3;
+ table[3][1]=(int(table[0][1])+int(table[1][1])*2)/3;
+ table[3][2]=(int(table[0][2])+int(table[1][2])*2)/3;
+ }
+
+ uint32_t block=src[4];
+ block<<=8;
+ block|=src[5];
+ block<<=8;
+ block|=src[6];
+ block<<=8;
+ block|=src[7];
+
+ int y = (j/(wd/4))*4;
+ int x = (j%(wd/4))*4;
+ int pixofs = (y*wd+x)*4;
+
+ for(int k=0;k<16;k++) {
+ int idx = pixofs+ofs_table[k];
+ dst[idx+0]=table[block&0x3][0];
+ dst[idx+1]=table[block&0x3][1];
+ dst[idx+2]=table[block&0x3][2];
+ dst[idx+3]=table[block&0x3][3];
+ block>>=2;
+ }
+
+ }
+
+ rofs+=len*8;
+ wofs+=wd*ht*4;
+
+
+ wd/=2;
+ ht/=2;
+
+ } break;
+ case FORMAT_BC2: {
+
+ int len = (wd*ht)/16;
+ uint8_t* dst=&w[wofs];
+
+ uint32_t ofs_table[16];
+ for(int x=0;x<4;x++) {
+
+ for(int y=0;y<4;y++) {
+
+ ofs_table[15-(y*4+(3-x))]=(x+y*wd)*4;
+ }
+ }
+
+
+ for(int j=0;j<len;j++) {
+
+ const uint8_t* src=&r[rofs+j*16];
+
+ uint64_t ablock=src[1];
+ ablock<<=8;
+ ablock|=src[0];
+ ablock<<=8;
+ ablock|=src[3];
+ ablock<<=8;
+ ablock|=src[2];
+ ablock<<=8;
+ ablock|=src[5];
+ ablock<<=8;
+ ablock|=src[4];
+ ablock<<=8;
+ ablock|=src[7];
+ ablock<<=8;
+ ablock|=src[6];
+
+
+ uint16_t col_a=src[8+1];
+ col_a<<=8;
+ col_a|=src[8+0];
+ uint16_t col_b=src[8+3];
+ col_b<<=8;
+ col_b|=src[8+2];
+
+ uint8_t table[4][4]={
+ { (col_a>>11)<<3, ((col_a>>5)&0x3f)<<2, ((col_a)&0x1f)<<3, 255 },
+ { (col_b>>11)<<3, ((col_b>>5)&0x3f)<<2, ((col_b)&0x1f)<<3, 255 },
+ {0,0,0,255},
+ {0,0,0,255}
+ };
+
+ //always gradient
+ table[2][0]=(int(table[0][0])*2+int(table[1][0]))/3;
+ table[2][1]=(int(table[0][1])*2+int(table[1][1]))/3;
+ table[2][2]=(int(table[0][2])*2+int(table[1][2]))/3;
+ table[3][0]=(int(table[0][0])+int(table[1][0])*2)/3;
+ table[3][1]=(int(table[0][1])+int(table[1][1])*2)/3;
+ table[3][2]=(int(table[0][2])+int(table[1][2])*2)/3;
+
+ uint32_t block=src[4+8];
+ block<<=8;
+ block|=src[5+8];
+ block<<=8;
+ block|=src[6+8];
+ block<<=8;
+ block|=src[7+8];
+
+ int y = (j/(wd/4))*4;
+ int x = (j%(wd/4))*4;
+ int pixofs = (y*wd+x)*4;
+
+ for(int k=0;k<16;k++) {
+ uint8_t alpha = ablock&0xf;
+ alpha=int(alpha)*255/15; //right way for alpha
+ int idx = pixofs+ofs_table[k];
+ dst[idx+0]=table[block&0x3][0];
+ dst[idx+1]=table[block&0x3][1];
+ dst[idx+2]=table[block&0x3][2];
+ dst[idx+3]=alpha;
+ block>>=2;
+ ablock>>=4;
+ }
+
+ }
+
+ rofs+=len*16;
+ wofs+=wd*ht*4;
+
+
+ wd/=2;
+ ht/=2;
+
+ } break;
+ case FORMAT_BC3: {
+
+ int len = (wd*ht)/16;
+ uint8_t* dst=&w[wofs];
+
+ uint32_t ofs_table[16];
+ for(int x=0;x<4;x++) {
+
+ for(int y=0;y<4;y++) {
+
+ ofs_table[15-(y*4+(3-x))]=(x+y*wd)*4;
+ }
+ }
+
+
+
+ for(int j=0;j<len;j++) {
+
+ const uint8_t* src=&r[rofs+j*16];
+
+ uint8_t a_start=src[1];
+ uint8_t a_end=src[0];
+
+ uint64_t ablock=src[3];
+ ablock<<=8;
+ ablock|=src[2];
+ ablock<<=8;
+ ablock|=src[5];
+ ablock<<=8;
+ ablock|=src[4];
+ ablock<<=8;
+ ablock|=src[7];
+ ablock<<=8;
+ ablock|=src[6];
+
+ uint8_t atable[8];
+
+ if (a_start>a_end) {
+
+ atable[0]=(int(a_start)*7+int(a_end)*0)/7;
+ atable[1]=(int(a_start)*6+int(a_end)*1)/7;
+ atable[2]=(int(a_start)*5+int(a_end)*2)/7;
+ atable[3]=(int(a_start)*4+int(a_end)*3)/7;
+ atable[4]=(int(a_start)*3+int(a_end)*4)/7;
+ atable[5]=(int(a_start)*2+int(a_end)*5)/7;
+ atable[6]=(int(a_start)*1+int(a_end)*6)/7;
+ atable[7]=(int(a_start)*0+int(a_end)*7)/7;
+ } else {
+
+ atable[0]=(int(a_start)*5+int(a_end)*0)/5;
+ atable[1]=(int(a_start)*4+int(a_end)*1)/5;
+ atable[2]=(int(a_start)*3+int(a_end)*2)/5;
+ atable[3]=(int(a_start)*2+int(a_end)*3)/5;
+ atable[4]=(int(a_start)*1+int(a_end)*4)/5;
+ atable[5]=(int(a_start)*0+int(a_end)*5)/5;
+ atable[6]=0;
+ atable[7]=255;
+
+ }
+
+
+ uint16_t col_a=src[8+1];
+ col_a<<=8;
+ col_a|=src[8+0];
+ uint16_t col_b=src[8+3];
+ col_b<<=8;
+ col_b|=src[8+2];
+
+ uint8_t table[4][4]={
+ { (col_a>>11)<<3, ((col_a>>5)&0x3f)<<2, ((col_a)&0x1f)<<3, 255 },
+ { (col_b>>11)<<3, ((col_b>>5)&0x3f)<<2, ((col_b)&0x1f)<<3, 255 },
+ {0,0,0,255},
+ {0,0,0,255}
+ };
+
+ //always gradient
+ table[2][0]=(int(table[0][0])*2+int(table[1][0]))/3;
+ table[2][1]=(int(table[0][1])*2+int(table[1][1]))/3;
+ table[2][2]=(int(table[0][2])*2+int(table[1][2]))/3;
+ table[3][0]=(int(table[0][0])+int(table[1][0])*2)/3;
+ table[3][1]=(int(table[0][1])+int(table[1][1])*2)/3;
+ table[3][2]=(int(table[0][2])+int(table[1][2])*2)/3;
+
+
+ uint32_t block=src[4+8];
+ block<<=8;
+ block|=src[5+8];
+ block<<=8;
+ block|=src[6+8];
+ block<<=8;
+ block|=src[7+8];
+
+ int y = (j/(wd/4))*4;
+ int x = (j%(wd/4))*4;
+ int pixofs = (y*wd+x)*4;
+
+
+
+ for(int k=0;k<16;k++) {
+ uint8_t alpha = ablock&0x7;
+ int idx = pixofs+ofs_table[k];
+ dst[idx+0]=table[block&0x3][0];
+ dst[idx+1]=table[block&0x3][1];
+ dst[idx+2]=table[block&0x3][2];
+ dst[idx+3]=atable[alpha];
+ block>>=2;
+ ablock>>=3;
+ }
+
+ }
+
+ rofs+=len*16;
+ wofs+=wd*ht*4;
+
+
+ wd/=2;
+ ht/=2;
+
+ } break;
+ }
+
+ }
+
+ w=DVector<uint8_t>::Write();
+ r=DVector<uint8_t>::Read();
+
+ data=newdata;
+ format=FORMAT_RGBA;
+
+ return OK;
+}
+
+
+Image Image::decompressed() const {
+
+ Image img=*this;
+ img.decompress();
+ return img;
+}
+
Error Image::decompress() {
- if (format>=FORMAT_BC1 && format<=FORMAT_BC5 && _image_decompress_bc)
- _image_decompress_bc(this);
+ if (format>=FORMAT_BC1 && format<=FORMAT_BC5 )
+ _decompress_bc();//_image_decompress_bc(this);
else if (format>=FORMAT_PVRTC2 && format<=FORMAT_PVRTC4_ALPHA && _image_decompress_pvrtc)
_image_decompress_pvrtc(this);
else if (format==FORMAT_ETC && _image_decompress_etc)
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-30 06:20:50 +0000