From 4bcef4bd354286bdaa50c61deba8a07707466bef Mon Sep 17 00:00:00 2001
From: Gary Talent <gary@drinkingtea.net>
Date: Wed, 1 Feb 2023 02:07:55 -0600
Subject: [PATCH] [nostalgia/core/userland] Add support for multiple sprite
 size/shapes

---
 src/nostalgia/core/userland/gfx_opengl.cpp | 73 ++++++++++++++++------
 1 file changed, 54 insertions(+), 19 deletions(-)

diff --git a/src/nostalgia/core/userland/gfx_opengl.cpp b/src/nostalgia/core/userland/gfx_opengl.cpp
index 5f66eeab..00941963 100644
--- a/src/nostalgia/core/userland/gfx_opengl.cpp
+++ b/src/nostalgia/core/userland/gfx_opengl.cpp
@@ -7,6 +7,7 @@
 #include <ox/std/array.hpp>
 #include <ox/std/fmt.hpp>
 
+#include <nostalgia/geo/vec.hpp>
 #include <nostalgia/glutils/glutils.hpp>
 
 #include <nostalgia/core/context.hpp>
@@ -27,7 +28,7 @@ constexpr uint64_t BgVertexVboRows = 4;
 constexpr uint64_t BgVertexVboRowLength = 4;
 constexpr uint64_t BgVertexVboLength = BgVertexVboRows * BgVertexVboRowLength;
 constexpr uint64_t BgVertexEboLength = 6;
-constexpr uint64_t SpriteVertexVboRows = 4;
+constexpr uint64_t SpriteVertexVboRows = 256;
 constexpr uint64_t SpriteVertexVboRowLength = 5;
 constexpr uint64_t SpriteVertexVboLength = SpriteVertexVboRows * SpriteVertexVboRowLength;
 constexpr uint64_t SpriteVertexEboLength = 6;
@@ -103,17 +104,7 @@ constexpr ox::StringView spritevshadTmpl = R"(
 		fTexCoord = vTexCoord * vec2(1, vTileHeight) * vec2(vEnabled, vEnabled);
 	})";
 
-constexpr ox::StringView spritefshadTmpl = R"(
-	{}
-	out vec4 outColor;
-	in vec2 fTexCoord;
-	uniform sampler2D image;
-	uniform vec4 fPalette[256];
-	void main() {
-		int idx = int(texture(image, fTexCoord).rgb.r * 256);
-		outColor = fPalette[idx];
-		//outColor = vec4(0.0, 0.7, 1.0, 1.0);
-	})";
+constexpr ox::StringView spritefshadTmpl = bgfshadTmpl;
 
 [[nodiscard]]
 static constexpr auto bgVertexRow(unsigned x, unsigned y) noexcept {
@@ -270,9 +261,9 @@ static void tickFps(GlImplData *id) noexcept {
 		const auto duration = static_cast<double>(now - id->prevFpsCheckTime) / 1000.0;
 		const auto fps = static_cast<int>(static_cast<double>(id->draws) / duration);
 		if constexpr(config::UserlandFpsPrint) {
-			oxInfof("FPS: {}", fps);
+			oxOutf("FPS: {}\n", fps);
 		}
-		oxTracef("nostalgia::core::gfx::gl::fps", "FPS: {}", fps);
+		oxTracef("nostalgia::core::gfx::fps", "FPS: {}", fps);
 		id->prevFpsCheckTime = now;
 		id->draws = 0;
 	}
@@ -432,7 +423,9 @@ void draw(Context *ctx) noexcept {
 	glClear(GL_COLOR_BUFFER_BIT);
 	// render
 	renderer::drawBackgrounds(id);
-	renderer::drawSprites(id);
+	if (id->spriteBlocks.tex) {
+		renderer::drawSprites(id);
+	}
 	for (const auto cd : ctx->drawers) {
 		cd->draw(ctx);
 	}
@@ -466,17 +459,59 @@ void setSprite(Context *ctx,
                [[maybe_unused]] unsigned spriteShape,
                [[maybe_unused]] unsigned spriteSize,
                unsigned flipX) noexcept {
+	//oxTracef("nostalgia::core::gfx::gl", "setSprite(ctx, {}, {}, {}, {}, {}, {}, {})",
+	//         idx, x, y, tileIdx, spriteShape, spriteSize, flipX);
+	// Tonc Table 8.4
+	static constexpr ox::Array<geo::Vec<unsigned>, 12> dimensions{
+		// col 0
+		{1, 1}, // 0, 0
+		{2, 2}, // 0, 1
+		{4, 4}, // 0, 2
+		{8, 8}, // 0, 3
+		// col 1
+		{2, 1}, // 1, 0
+		{4, 1}, // 1, 1
+		{4, 2}, // 1, 2
+		{8, 4}, // 1, 3
+		// col 2
+		{1, 1}, // 2, 0
+		{1, 4}, // 2, 1
+		{2, 4}, // 2, 2
+		{4, 8}, // 2, 3
+	};
+	const auto dim = dimensions[(spriteShape << 2) | spriteSize];
 	const auto uX = static_cast<unsigned>(x) % 255;
 	const auto uY = static_cast<unsigned>(y) % 127;
 	auto &id = *ctx->rendererData<renderer::GlImplData>();
-	auto vbo = &id.spriteBlocks.vertices[idx * renderer::SpriteVertexVboLength];
-	auto ebo = &id.spriteBlocks.elements[idx * renderer::SpriteVertexEboLength];
-	renderer::setSpriteBufferObject(ctx, idx * renderer::SpriteVertexVboRows, 1,
-	                                static_cast<float>(uX) / 8, static_cast<float>(uY) / 8, tileIdx, flipX, vbo, ebo);
+	auto i = 0u;
+	const auto set = [&](unsigned xIt, unsigned yIt) {
+		const auto fX = static_cast<float>(uX + xIt * 8) / 8;
+		const auto fY = static_cast<float>(uY + yIt * 8) / 8;
+		const auto cidx = idx + i;
+		auto vbo = &id.spriteBlocks.vertices[cidx * renderer::SpriteVertexVboLength];
+		auto ebo = &id.spriteBlocks.elements[cidx * renderer::SpriteVertexEboLength];
+		renderer::setSpriteBufferObject(ctx, cidx * renderer::SpriteVertexVboRows, 1,
+												  fX, fY, tileIdx + i, flipX, vbo, ebo);
+		++i;
+	};
+	if (!flipX) {
+		for (auto yIt = 0u; yIt < dim.y; ++yIt) {
+			for (auto xIt = 0u; xIt < dim.x; ++xIt) {
+				set(xIt, yIt);
+			}
+		}
+	} else {
+		for (auto yIt = 0u; yIt < dim.y; ++yIt) {
+			for (auto xIt = dim.x - 1; xIt < ~0u; --xIt) {
+				set(xIt, yIt);
+			}
+		}
+	}
 	id.spriteBlocks.updated = true;
 }
 
 void setTile(Context *ctx, unsigned bgIdx, int column, int row, uint8_t tile) noexcept {
+	//oxTracef("nostalgia::core::gfx::gl", "setTile(ctx, {}, {}, {}, {})", bgIdx, column, row, tile);
 	const auto id = ctx->rendererData<renderer::GlImplData>();
 	const auto z = static_cast<unsigned>(bgIdx);
 	const auto y = static_cast<unsigned>(row);