From cd8ae0e4f628bd491fcaf1dd4778bc283d619065 Mon Sep 17 00:00:00 2001
From: Hannes Schulze <haschu0103@outlook.de>
Date: Fri, 31 Jan 2025 23:24:45 +0100
Subject: implement renderer

---
 lib/nes/app/graphics/renderer.cc | 104 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 104 insertions(+)
 create mode 100644 lib/nes/app/graphics/renderer.cc

(limited to 'lib/nes/app/graphics/renderer.cc')

diff --git a/lib/nes/app/graphics/renderer.cc b/lib/nes/app/graphics/renderer.cc
new file mode 100644
index 0000000..c53ea12
--- /dev/null
+++ b/lib/nes/app/graphics/renderer.cc
@@ -0,0 +1,104 @@
+#include "nes/app/graphics/renderer.hh"
+#include "nes/app/graphics/color.hh"
+#include "nes/app/graphics/mask-tile.hh"
+#include "nes/app/graphics/image-tile.hh"
+#include "nes/app/graphics/image-view.hh"
+#include "nes/common/display.hh"
+
+namespace nes::app
+{
+	renderer::renderer(display& display)
+		: display_{ display }
+	{
+	}
+
+	auto renderer::render_image_tile(unsigned const x, unsigned const y, image_tile const tile) -> void
+	{
+		if (x >= width || y >= height) { return; }
+
+		for (auto y_px = unsigned{ 0 }; y_px < 8; ++y_px)
+		{
+			for (auto x_px = unsigned{ 0 }; x_px < 8; ++x_px)
+			{
+				auto const c = tile.data[y_px * 8 + x_px];
+				if (c != color::transparent)
+				{
+					display_.set(8 * x + x_px, 8 * y + y_px, resolve_color(c));
+				}
+			}
+		}
+	}
+
+	auto renderer::render_mask_tile(unsigned const x, unsigned const y, mask_tile const tile, color const c) -> void
+	{
+		if (c == color::transparent) { return; }
+		if (x >= width || y >= height) { return; }
+
+		auto const resolved = resolve_color(c);
+		for (auto y_px = unsigned{ 0 }; y_px < 8; ++y_px)
+		{
+			auto row = tile.data[y_px];
+			for (auto x_px = unsigned{ 0 }; x_px < 8; ++x_px)
+			{
+				if (row & 0b10000000)
+				{
+					display_.set(8 * x + x_px, 8 * y + y_px, resolved);
+				}
+				row <<= 1;
+			}
+		}
+	}
+
+	auto renderer::render_image(unsigned const x, unsigned const y, image_view const image) -> void
+	{
+		for (auto y_img = unsigned{ 0 }; y_img < image.get_height(); ++y_img)
+		{
+			for (auto x_img = unsigned{ 0 }; x_img < image.get_width(); ++x_img)
+			{
+				render_image_tile(x + x_img, y + y_img, image.get(x, y));
+			}
+		}
+	}
+
+	auto renderer::render_rect(
+		unsigned const x, unsigned const y, unsigned const width, unsigned const height, color const c) -> void
+	{
+		if (c == color::transparent) { return; }
+		if (x >= width || y >= height) { return; }
+
+		auto const resolved = resolve_color(c);
+		auto const x_stop = std::min(x + width, renderer::width);
+		auto const y_stop = std::min(y + width, renderer::height);
+		for (auto y_px = unsigned{ y * 8 }; y_px < y_stop * 8; ++y_px)
+		{
+			for (auto x_px = unsigned{ x * 8 }; x_px < x_stop * 8; ++x_px)
+			{
+				display_.set(x_px, y_px, resolved);
+			}
+		}
+	}
+
+	auto renderer::render_fill(color const c) -> void
+	{
+		render_rect(0, 0, width, height, c);
+	}
+
+	auto renderer::resolve_color(color const c) const -> rgb
+	{
+		switch (c)
+		{
+			case color::transparent: break;
+			case color::background_primary: return rgb::from_hex(0x004058);
+			case color::background_secondary: return rgb::from_hex(0x002B3B);
+			case color::foreground_primary: return rgb::from_hex(0xFCFCFC);
+			case color::foreground_secondary: return rgb::from_hex(0x008888);
+			case color::accent_primary: return rgb::from_hex(0xE45C10);
+			case color::accent_secondary: return rgb::from_hex(0x881400);
+			case color::fixed_white: return rgb::from_hex(0xFCFCFC);
+			case color::fixed_gray: return rgb::from_hex(0xBCBCBC);
+			case color::fixed_black: return rgb::from_hex(0x000000);
+		}
+
+		return rgb::from_hex(0x000000);
+	}
+} // namespace nes::app
\ No newline at end of file
-- 
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