From 05dc633a8c35221ce8d6abe6ddf027f8b0bab6c2 Mon Sep 17 00:00:00 2001
From: tfarley <tfarleygithub@gmail.com>
Date: Mon, 18 May 2015 21:21:33 -0700
Subject: OpenGL renderer

---
 src/video_core/renderer_opengl/pica_to_gl.h | 105 ++++++++++++++++++++++++++++
 1 file changed, 105 insertions(+)
 create mode 100644 src/video_core/renderer_opengl/pica_to_gl.h

(limited to 'src/video_core/renderer_opengl/pica_to_gl.h')

diff --git a/src/video_core/renderer_opengl/pica_to_gl.h b/src/video_core/renderer_opengl/pica_to_gl.h
new file mode 100644
index 00000000..8369c649
--- /dev/null
+++ b/src/video_core/renderer_opengl/pica_to_gl.h
@@ -0,0 +1,105 @@
+// Copyright 2015 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "common/common_types.h"
+
+#include "video_core/pica.h"
+
+#include "generated/gl_3_2_core.h"
+
+namespace PicaToGL {
+
+inline GLenum WrapMode(Pica::Regs::TextureConfig::WrapMode mode) {
+    static const GLenum wrap_mode_table[] = {
+        GL_CLAMP_TO_EDGE,  // WrapMode::ClampToEdge
+        0,                 // Unknown
+        GL_REPEAT,         // WrapMode::Repeat
+        GL_MIRRORED_REPEAT // WrapMode::MirroredRepeat
+    };
+
+    // Range check table for input
+    if (mode >= ARRAY_SIZE(wrap_mode_table)) {
+        LOG_CRITICAL(Render_OpenGL, "Unknown texture wrap mode %d", mode);
+        UNREACHABLE();
+
+        return GL_CLAMP_TO_EDGE;
+    }
+
+    GLenum gl_mode = wrap_mode_table[mode];
+
+    // Check for dummy values indicating an unknown mode
+    if (gl_mode == 0) {
+        LOG_CRITICAL(Render_OpenGL, "Unknown texture wrap mode %d", mode);
+        UNIMPLEMENTED();
+
+        return GL_CLAMP_TO_EDGE;
+    }
+
+    return gl_mode;
+}
+
+inline GLenum BlendFunc(u32 factor) {
+    static const GLenum blend_func_table[] = {
+        GL_ZERO,                     // BlendFactor::Zero
+        GL_ONE,                      // BlendFactor::One
+        GL_SRC_COLOR,                // BlendFactor::SourceColor
+        GL_ONE_MINUS_SRC_COLOR,      // BlendFactor::OneMinusSourceColor
+        GL_DST_COLOR,                // BlendFactor::DestColor
+        GL_ONE_MINUS_DST_COLOR,      // BlendFactor::OneMinusDestColor
+        GL_SRC_ALPHA,                // BlendFactor::SourceAlpha
+        GL_ONE_MINUS_SRC_ALPHA,      // BlendFactor::OneMinusSourceAlpha
+        GL_DST_ALPHA,                // BlendFactor::DestAlpha
+        GL_ONE_MINUS_DST_ALPHA,      // BlendFactor::OneMinusDestAlpha
+        GL_CONSTANT_COLOR,           // BlendFactor::ConstantColor
+        GL_ONE_MINUS_CONSTANT_COLOR, // BlendFactor::OneMinusConstantColor
+        GL_CONSTANT_ALPHA,           // BlendFactor::ConstantAlpha
+        GL_ONE_MINUS_CONSTANT_ALPHA, // BlendFactor::OneMinusConstantAlpha
+        GL_SRC_ALPHA_SATURATE,       // BlendFactor::SourceAlphaSaturate
+    };
+
+    // Range check table for input
+    if (factor >= ARRAY_SIZE(blend_func_table)) {
+        LOG_CRITICAL(Render_OpenGL, "Unknown blend factor %d", factor);
+        UNREACHABLE();
+
+        return GL_ONE;
+    }
+
+    return blend_func_table[factor];
+}
+
+inline GLenum CompareFunc(u32 func) {
+    static const GLenum compare_func_table[] = {
+        GL_NEVER,    // CompareFunc::Never
+        GL_ALWAYS,   // CompareFunc::Always
+        GL_EQUAL,    // CompareFunc::Equal
+        GL_NOTEQUAL, // CompareFunc::NotEqual
+        GL_LESS,     // CompareFunc::LessThan
+        GL_LEQUAL,   // CompareFunc::LessThanOrEqual
+        GL_GREATER,  // CompareFunc::GreaterThan
+        GL_GEQUAL,   // CompareFunc::GreaterThanOrEqual
+    };
+
+    // Range check table for input
+    if (func >= ARRAY_SIZE(compare_func_table)) {
+        LOG_CRITICAL(Render_OpenGL, "Unknown compare function %d", func);
+        UNREACHABLE();
+
+        return GL_ALWAYS;
+    }
+
+    return compare_func_table[func];
+}
+
+inline std::array<GLfloat, 4> ColorRGBA8(const u8* bytes) {
+    return { { bytes[0] / 255.0f,
+               bytes[1] / 255.0f,
+               bytes[2] / 255.0f,
+               bytes[3] / 255.0f
+           } };
+}
+
+} // namespace
-- 
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