[nostalgia] Start on new TileSheetEditor

src/nostalgia/core/studio/tilesheetpixels.hpp

@@ -0,0 +1,59 @@
+/*
+ * Copyright 2016 - 2021 Gary Talent (gary@drinkingtea.net). All rights reserved.
+ */
+
+#pragma once
+
+#include <imgui.h>
+
+#include <nostalgia/core/gfx.hpp>
+#include <nostalgia/glutils/glutils.hpp>
+#include <nostalgia/studio/studio.hpp>
+
+namespace nostalgia::core {
+
+class TileSheetPixels {
+
+	private:
+		static constexpr auto VertexVboRows = 4;
+		static constexpr auto VertexVboRowLength = 5;
+		static constexpr auto VertexVboLength = VertexVboRows * VertexVboRowLength;
+		static constexpr auto VertexEboLength = 6;
+		static constexpr auto VShad = R"(
+		{}
+		in vec2 vPosition;
+		in vec3 vColor;
+		out vec3 fColor;
+		void main() {
+			gl_Position = vec4(vPosition, 0.0, 1.0);
+			fColor = vColor;
+		})";
+		static constexpr auto FShad = R"(
+		{}
+		in vec3 fColor;
+		out vec4 outColor;
+		void main() {
+			//outColor = vec4(0.0, 0.7, 1.0, 1.0);
+			outColor = vec4(fColor, 1.0);
+		})";
+
+		glutils::GLProgram m_shader;
+		glutils::BufferSet m_bufferSet;
+
+	public:
+		ox::Error buildShader() noexcept;
+
+		void draw(bool update) noexcept;
+
+		void initBufferSet(const NostalgiaGraphic &img, const NostalgiaPalette &pal) noexcept;
+
+	private:
+		static void setPixelBufferObject(unsigned vertexRow, float x, float y, Color16 color, float *vbo, GLuint *ebo) noexcept;
+
+		void setBufferObjects(const NostalgiaGraphic &img, const NostalgiaPalette &pal, glutils::BufferSet *bg) noexcept;
+
+		static class ImVec2 pixelSize() noexcept;
+
+};
+
+}