Whatewver

src/display/texture/palette.h

@@ -8,6 +8,18 @@
 #pragma once
 #include "display/color.h"
 
+#if DISPLAY_SDL2
+  #if DISPLAY_SHADER == 1
+
+  #elif DISPLAY_COLOR_TABLE == 1
+    
+  #else
+    #error "Unsupported palette mode"
+  #endif
+#else
+  #error "Unsupported palette mode"
+#endif
+
 #define PALETTE_COUNT_MAX 4
 #define PALETTE_COLOR_COUNT_MAX 0xFF
 

src/display/texture/palettetexture.c

@@ -0,0 +1,51 @@
+/**
+ * Copyright (c) 2026 Dominic Masters
+ * 
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#include "palettetexture.h"
+#include "assert/assert.h"
+
+void paletteTextureInit(
+  palettetexture_t *texture,
+  const int32_t width,
+  const int32_t height,
+  const uint8_t *data
+) {
+  assertNotNull(texture, "Palette texture cannot be NULL");
+  assertTrue(width > 0 && height > 0, "width/height must be greater than 0");
+  assertNotNull(data, "Palette texture data cannot be NULL");
+
+  #if DISPLAY_SDL2
+    #if DISPLAY_SHADER == 1
+      // Palette textures not supported, convert to GL_RED style texture
+      // so shader can perform the lookup.
+      uint8_t formatted[width * height];
+      for(int32_t i = 0; i < width * height; i++) {
+        uint8_t index = data.paletteData[i];
+        formatted[i] = index * 128;
+      }
+      glTexImage2D(
+        GL_TEXTURE_2D, 0, GL_R8, width, height, 0,
+        GL_RED, GL_UNSIGNED_BYTE, (void*)formatted
+      );
+      
+    #else
+      glTexImage2D(
+        GL_TEXTURE_2D,
+        0, GL_COLOR_INDEX8_EXT,
+        width, height,
+        0, GL_COLOR_INDEX8_EXT,
+        GL_UNSIGNED_BYTE, (void*)data.paletteData
+      );
+      // glColorTableEXT(
+      //   GL_TEXTURE_2D, GL_RGBA, data.palette.palette->colorCount, GL_RGBA,
+      //   GL_UNSIGNED_BYTE, (const void*)data.palette.palette->colors
+      // );
+    #endif
+  #else
+    #error "Palette textures not supported on this platform"
+  #endif
+}

src/display/texture/palettetexture.h

@@ -0,0 +1,28 @@
+/**
+ * Copyright (c) 2026 Dominic Masters
+ * 
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#pragma once
+#include "dusk.h"
+
+typedef struct {
+  
+} palettetexture_t;
+
+/**
+ * Initializes a palette texture.
+ * 
+ * @param texture The palette texture to initialize.
+ * @param width The width of the texture. Must be a power of 2.
+ * @param height The height of the texture. Must be a power of 2.
+ * @param data The palette index data for the texture.
+ */
+void paletteTextureInit(
+  palettetexture_t *texture,
+  const int32_t width,
+  const int32_t height,
+  const uint8_t *data
+);