From d13a006945aad31d990266e0c251bb69d9eaa911 Mon Sep 17 00:00:00 2001
From: Benlitz <dev@benlitz.net>
Date: Mon, 17 Jun 2013 15:31:57 +0000
Subject: [PATCH] SetMagFiltering and SetMinFiltering for class Texture.

---
 src/gpu/shader.cpp    |  3 +++
 src/gpu/texture.cpp   | 60 +++++++++++++++++++++++++++++++++++++++++++
 src/lol/gpu/shader.h  |  3 +++
 src/lol/gpu/texture.h | 37 ++++++++++++++++++++++++++
 4 files changed, 103 insertions(+)

diff --git a/src/gpu/shader.cpp b/src/gpu/shader.cpp
index a2ae57c6..70ed34d1 100644
--- a/src/gpu/shader.cpp
+++ b/src/gpu/shader.cpp
@@ -550,6 +550,9 @@ void Shader::SetUniform(ShaderUniform const &uni, ShaderTexture tex, int index)
 {
 #if defined USE_D3D9 || defined _XBOX
     g_d3ddevice->SetTexture(index, (LPDIRECT3DTEXTURE9)tex.m_flags);
+	g_d3ddevice->SetSamplerState(index, D3DSAMP_MAGFILTER, tex.m_attrib & 0xff);
+	g_d3ddevice->SetSamplerState(index, D3DSAMP_MINFILTER, (tex.m_attrib >> 8) & 0xff);
+	g_d3ddevice->SetSamplerState(index, D3DSAMP_MIPFILTER, (tex.m_attrib >> 16) & 0xff);
 #elif !defined __CELLOS_LV2__
     glActiveTexture(GL_TEXTURE0 + index);
     //glEnable(GL_TEXTURE_2D);
diff --git a/src/gpu/texture.cpp b/src/gpu/texture.cpp
index 4cf42f30..815541dc 100644
--- a/src/gpu/texture.cpp
+++ b/src/gpu/texture.cpp
@@ -46,6 +46,9 @@ class TextureData
 
 #if defined USE_D3D9
     IDirect3DTexture9 *m_texture;
+	D3DTEXTUREFILTERTYPE m_mag_filter;
+	D3DTEXTUREFILTERTYPE  m_min_filter;
+	D3DTEXTUREFILTERTYPE  m_mip_filter;
 #elif defined _XBOX
     D3DTexture *m_texture;
 #else
@@ -170,6 +173,9 @@ ShaderTexture Texture::GetTexture() const
     ShaderTexture ret;
 #if defined USE_D3D9 || defined _XBOX
     ret.m_flags = (uint64_t)(uintptr_t)m_data->m_texture;
+	ret.m_attrib = m_data->m_mag_filter;
+	ret.m_attrib |= m_data->m_min_filter << 8;
+	ret.m_attrib |= m_data->m_mip_filter << 16;
 #else
     ret.m_flags = m_data->m_texture;
 #endif
@@ -231,6 +237,60 @@ void Texture::SetSubData(ivec2 origin, ivec2 size, void *data)
 #endif
 }
 
+void Texture::SetMagFiltering(TextureMagFilter filter)
+{
+#if defined _XBOX || defined USE_D3D9
+	// In DirectX, texture filtering is a per-texture-unit state
+	switch (filter)
+	{
+	case TextureMagFilter::NEAREST_TEXEL: m_data->m_mag_filter = D3DTEXF_POINT; break;
+	case TextureMagFilter::LINEAR_TEXEL: m_data->m_mag_filter = D3DTEXF_LINEAR; break;
+	}	
+#else
+    glBindTexture(GL_TEXTURE_2D, m_data->m_texture);
+	GLenum gl_filter;
+	switch (filter)
+	{
+	case TextureMagFilter::NEAREST_TEXEL: gl_filter = GL_NEAREST; break;
+	case TextureMagFilter::LINEAR_TEXEL: gl_filter = GL_LINEAR; break;
+	}
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, gl_filter);
+#endif
+}
+
+void Texture::SetMinFiltering(TextureMinFilter filter)
+{
+#if defined _XBOX || defined USE_D3D9
+	// In DirectX, texture filtering is a per-texture-unit state
+#define F(x, y) \
+	m_data->m_min_filter = x; m_data->m_mip_filter = y;
+	switch (filter)
+	{
+	case TextureMinFilter::NEAREST_TEXEL_NO_MIPMAP: F(D3DTEXF_POINT, D3DTEXF_NONE); break;
+	case TextureMinFilter::LINEAR_TEXEL_NO_MIPMAP: F(D3DTEXF_POINT, D3DTEXF_NONE); break;
+	case TextureMinFilter::NEAREST_TEXEL_NEAREST_MIPMAP: F(D3DTEXF_POINT, D3DTEXF_POINT); break;
+	case TextureMinFilter::LINEAR_TEXEL_NEAREST_MIPMAP: F(D3DTEXF_LINEAR, D3DTEXF_POINT); break;
+	case TextureMinFilter::NEAREST_TEXEL_LINEAR_MIPMAP: F(D3DTEXF_POINT, D3DTEXF_LINEAR); break;
+	case TextureMinFilter::LINEAR_TEXEL_LINEAR_MIPMAP: F(D3DTEXF_LINEAR, D3DTEXF_LINEAR); break;
+	}
+#undef F
+
+#else
+    glBindTexture(GL_TEXTURE_2D, m_data->m_texture);
+	GLenum gl_filter;
+	switch (filter)
+	{
+	case TextureMinFilter::NEAREST_TEXEL_NO_MIPMAP: gl_filter = GL_NEAREST; break;
+	case TextureMinFilter::LINEAR_TEXEL_NO_MIPMAP: gl_filter = GL_LINEAR; break;
+	case TextureMinFilter::NEAREST_TEXEL_NEAREST_MIPMAP: gl_filter = GL_NEAREST_MIPMAP_NEAREST; break;
+	case TextureMinFilter::NEAREST_TEXEL_LINEAR_MIPMAP: gl_filter = GL_NEAREST_MIPMAP_LINEAR; break;
+	case TextureMinFilter::LINEAR_TEXEL_NEAREST_MIPMAP: gl_filter = GL_LINEAR_MIPMAP_NEAREST; break;
+	case TextureMinFilter::LINEAR_TEXEL_LINEAR_MIPMAP: gl_filter = GL_LINEAR_MIPMAP_LINEAR; break;
+	}
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, gl_filter);
+#endif
+}
+
 Texture::~Texture()
 {
 #if defined USE_D3D9 || defined _XBOX
diff --git a/src/lol/gpu/shader.h b/src/lol/gpu/shader.h
index 5186cf70..1e2fdff0 100644
--- a/src/lol/gpu/shader.h
+++ b/src/lol/gpu/shader.h
@@ -57,6 +57,9 @@ public:
 
 private:
     uint64_t m_flags;
+#if defined USE_D3D9 || defined _XBOX
+	uint32_t m_attrib;
+#endif
 };
 
 class ShaderData;
diff --git a/src/lol/gpu/texture.h b/src/lol/gpu/texture.h
index 83e8106b..8b142b5f 100644
--- a/src/lol/gpu/texture.h
+++ b/src/lol/gpu/texture.h
@@ -54,6 +54,40 @@ struct PixelFormat
     }
 };
 
+struct TextureMagFilter
+{
+    enum Value
+    {
+        Unknown = 0,
+		NEAREST_TEXEL,
+		LINEAR_TEXEL,
+    }
+    m_value;
+
+    inline TextureMagFilter() : m_value(Unknown) {}
+    inline TextureMagFilter(Value v) : m_value(v) {}
+    inline operator Value() { return m_value; }
+};
+
+struct TextureMinFilter
+{
+    enum Value
+    {
+        Unknown = 0,
+		NEAREST_TEXEL_NO_MIPMAP,
+		LINEAR_TEXEL_NO_MIPMAP,
+		NEAREST_TEXEL_NEAREST_MIPMAP,
+		NEAREST_TEXEL_LINEAR_MIPMAP,
+		LINEAR_TEXEL_NEAREST_MIPMAP,
+		LINEAR_TEXEL_LINEAR_MIPMAP,
+    }
+    m_value;
+
+    inline TextureMinFilter() : m_value(Unknown) {}
+    inline TextureMinFilter(Value v) : m_value(v) {}
+    inline operator Value() { return m_value; }
+};
+
 class Texture
 {
 public:
@@ -64,6 +98,9 @@ public:
     void SetData(void *data);
     void SetSubData(ivec2 origin, ivec2 size, void *data);
 
+	void SetMagFiltering(TextureMagFilter filter);
+	void SetMinFiltering(TextureMinFilter filter);
+
     ShaderTexture GetTexture() const;
 
 private: