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fix bpp calculation for vq compressed textures

This commit is contained in:
Anthony Pesch 2017-10-19 16:53:06 -07:00
parent 6e9f8b9ddb
commit 747fddb805
1 changed files with 10 additions and 4 deletions
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14
src/guest/pvr/ta.c
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@ -160,21 +160,27 @@ uint32_t ta_texture_addr(union tsp tsp, union tcw tcw, int *size) {
uint32_t texture_addr = tcw.texture_addr << 3;
int texture_size = 0;
int compressed = ta_texture_compressed(tcw);
int mipmaps = ta_texture_mipmaps(tcw);
int width = ta_texture_width(tsp, tcw);
int height = ta_texture_height(tsp, tcw);
/* compressed textures have the additional fixed-size codebook */
if (ta_texture_compressed(tcw)) {
if (compressed) {
texture_size += PVR_CODEBOOK_SIZE;
}
/* calculate the size of each mipmap level */
int width = ta_texture_width(tsp, tcw);
int height = ta_texture_height(tsp, tcw);
int bpp = 16;
if (tcw.pixel_fmt == PVR_PXL_8BPP) {
bpp = 8;
} else if (tcw.pixel_fmt == PVR_PXL_4BPP) {
bpp = 4;
} else if (compressed) {
/* each index in a compressed texture is 8 bits and represents 4 pixels */
bpp = 2;
}
int mipmaps = ta_texture_mipmaps(tcw);
int levels = mipmaps ? ctz32(width) + 1 : 1;
while (levels--) {
int mip_width = width >> levels;