Merge pull request #2122 from PCSX2/target_load

GSdx-TC: Fix load size calculation in target update Fixes #1972 Fixes #2110 Fixes #2138

plugins/GSdx/GS.h

@@ -1457,3 +1457,9 @@ enum class CRCHackLevel : int8
 	Full,
 	Aggressive
 };
+
+#ifdef ENABLE_ACCURATE_BUFFER_EMULATION
+const GSVector2i default_rt_size(2048, 2048);
+#else
+const GSVector2i default_rt_size(1280, 1024);
+#endif

plugins/GSdx/GSRendererHW.cpp

@@ -23,8 +23,8 @@
 #include "GSRendererHW.h"
 
 GSRendererHW::GSRendererHW(GSTextureCache* tc)
-	: m_width(native_buffer.x)
-	, m_height(native_buffer.y)
+	: m_width(default_rt_size.x)
+	, m_height(default_rt_size.y)
 	, m_custom_width(1024)
 	, m_custom_height(1024)
 	, m_reset(false)
@@ -159,8 +159,8 @@ void GSRendererHW::CustomResolutionScaling()
 		return;
 
 	m_tc->RemovePartial();
-	m_width = std::max(m_width, native_buffer.x);
-	m_height = std::max(framebuffer_height[m_large_framebuffer], native_buffer.y);
+	m_width = std::max(m_width, default_rt_size.x);
+	m_height = std::max(framebuffer_height[m_large_framebuffer], default_rt_size.y);
 
 	std::string overhead = std::to_string(framebuffer_height[1] - framebuffer_height[0]);
 	std::string message = "(Custom resolution) Framebuffer size set to " + std::to_string(crtc_width) + "x" + std::to_string(crtc_height);

plugins/GSdx/GSRendererHW.h

@@ -30,7 +30,6 @@
 class GSRendererHW : public GSRenderer
 {
 private:
-	GSVector2i native_buffer = GSVector2i{1280, 1024};
 	int m_width;
 	int m_height;
 	int m_custom_width;

plugins/GSdx/GSTextureCache.cpp

@@ -1846,18 +1846,13 @@ void GSTextureCache::Target::Update()
 	// Alternate
 	// 1/ uses multiple vertex rectangle
 
-	GSVector2i t_size = m_texture->GetSize();
-	GSVector2 t_scale = m_texture->GetScale();
+	GSVector2i t_size = default_rt_size;
 
-	//Avoids division by zero when calculating texture size.
-	t_scale = GSVector2(std::max(1.0f, t_scale.x), std::max(1.0f, t_scale.y));
-	t_size.x = lround(static_cast<float>(t_size.x) / t_scale.x);
-	t_size.y = lround(static_cast<float>(t_size.y) / t_scale.y);
-
-	// Don't load above the GS memory
-	int max_y_blocks = (MAX_BLOCKS - m_TEX0.TBP0) / std::max(1u, m_TEX0.TBW);
-	int max_y = (max_y_blocks >> 5) * GSLocalMemory::m_psm[m_TEX0.PSM].pgs.y;
-	t_size.y = std::min(t_size.y, max_y);
+	// Ensure buffer width is at least of the minimum required value.
+	// Probably not necessary but doesn't hurt to be on the safe side.
+	// I've seen some games use buffer sizes over 1024, which might bypass our default limit
+	int buffer_width = m_TEX0.TBW << 6;
+	t_size.x = std::max(buffer_width, t_size.x);
 
 	GSVector4i r = m_dirty.GetDirtyRectAndClear(m_TEX0, t_size);
 

plugins/GSdx/config.h

@@ -23,6 +23,7 @@
 
 //#define ENABLE_VTUNE
 //#define ENABLE_PCRTC_DEBUG
+//#define ENABLE_ACCURATE_BUFFER_EMULATION
 #define ENABLE_JIT_RASTERIZER
 
 #define EXTERNAL_SHADER_LOADING 1