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gsdx-tc: add an explanation of the magic number 0x140

This commit is contained in:
Gregory Hainaut 2015-05-18 07:40:01 +02:00
parent 97b237712c
commit 0cb6c37f14
2 changed files with 6 additions and 1 deletions
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1
plugins/GSdx/GSRendererHW.cpp
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@ -64,7 +64,6 @@ void GSRendererHW::SetScaling(){
{ {
m_width = (m_buffer_size * 64) * m_upscale_multiplier; m_width = (m_buffer_size * 64) * m_upscale_multiplier;
m_height = m_width; //Keep it square m_height = m_width; //Keep it square
} }
} }
else else

6
plugins/GSdx/GSTextureCache.cpp
View File

@ -136,6 +136,9 @@ GSTextureCache::Source* GSTextureCache::LookupSource(const GIFRegTEX0& TEX0, con
} else if ((t->m_TEX0.TBW == 20) && (t->m_TEX0.PSM == 2) && GSUtil::HasSharedBits(bp, psm, t->m_TEX0.TBP0 + 0x140, t->m_TEX0.PSM)) { } else if ((t->m_TEX0.TBW == 20) && (t->m_TEX0.PSM == 2) && GSUtil::HasSharedBits(bp, psm, t->m_TEX0.TBP0 + 0x140, t->m_TEX0.PSM)) {
// try to detect render target bigger than 1024 Texels // try to detect render target bigger than 1024 Texels
// 0x140: In 16 bits format, pages are 64 pixels and 8KB
// Half of 1280 is 640 so 10 pages
// TBP0 unit is block of 256B => (10 pages * 8 KB) / (1 block * 256B) = 320 = 0x140
half_right = true; half_right = true;
dst = t; dst = t;
@ -363,6 +366,9 @@ void GSTextureCache::InvalidateVideoMem(GSOffset* off, const GSVector4i& rect, b
if ((bw == 20) && (psm == 2)) { if ((bw == 20) && (psm == 2)) {
// try to detect render target bigger than 1024 Texels // try to detect render target bigger than 1024 Texels
// 0x140: In 16 bits format, pages are 64 pixels and 8KB
// Half of 1280 is 640 so 10 pages
// TBP0 unit is block of 256B => (10 pages * 8 KB) / (1 block * 256B) = 320 = 0x140
uint32 bbp = bp + 0x140; uint32 bbp = bp + 0x140;
const list<Source*>& m = m_src.m_map[bbp >> 5]; const list<Source*>& m = m_src.m_map[bbp >> 5];