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Merge pull request #7 from Cruel/texture-formats

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Add ETC1 and ETC1A4 texture support
This commit is contained in:
fincs 2016-05-03 12:36:14 +02:00
commit d0f8988237
1 changed files with 13 additions and 7 deletions
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20
source/texture.c
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@ -1,26 +1,30 @@
#include "context.h"
#include <string.h>
// Return bits per pixel
static inline size_t fmtSize(GPU_TEXCOLOR fmt)
{
switch (fmt)
{
case GPU_RGBA8:
return 4;
return 32;
case GPU_RGB8:
return 3;
return 24;
case GPU_RGBA5551:
case GPU_RGB565:
case GPU_RGBA4:
case GPU_LA8:
case GPU_HILO8:
return 2;
return 16;
case GPU_L8:
case GPU_A8:
case GPU_LA4:
return 1;
//case GPU_L4: // is actually 0.5
//TODO: ETC is ??
case GPU_ETC1A4:
return 8;
case GPU_L4:
case GPU_A4:
case GPU_ETC1:
return 4;
default:
return 0;
}
@ -38,7 +42,7 @@ static bool C3Di_TexInitCommon(C3D_Tex* tex, int width, int height, GPU_TEXCOLOR
u32 size = fmtSize(format);
if (!size) return false;
size *= width * height;
size *= width * height / 8;
tex->data = texAlloc(size);
if (!tex->data) return false;
@ -46,6 +50,8 @@ static bool C3Di_TexInitCommon(C3D_Tex* tex, int width, int height, GPU_TEXCOLOR
tex->width = width;
tex->height = height;
tex->param = GPU_TEXTURE_MAG_FILTER(GPU_NEAREST) | GPU_TEXTURE_MIN_FILTER(GPU_NEAREST);
if (format == GPU_ETC1)
tex->param |= GPU_TEXTURE_ETC1_PARAM;
tex->fmt = format;
tex->size = size;
return true;