Add compressed texture formats;

src/graphics/graphics.c

@@ -49,7 +49,7 @@ void lovrGraphicsInit() {
   // Initialize all the things
   glfwMakeContextCurrent(state.window);
   glfwSetWindowCloseCallback(state.window, onCloseWindow);
-#ifdef _WIN32
+#ifndef LOVR_WEB
   gladLoadGLLoader((GLADloadproc) glfwGetProcAddress);
 #endif
   glfwSetTime(0);

src/lib/glfw.h

@@ -6,7 +6,7 @@
 #define GLFW_INCLUDE_GLCOREARB
 #elif _WIN32
 #define APIENTRY __stdcall
-#include "glad/glad.h"
 #endif
 
+#include "glad/glad.h"
 #include <GLFW/glfw3.h>

src/loaders/texture.c

@@ -17,6 +17,27 @@ const TextureFormat FORMAT_RGBA = {
   .blockBytes = 4
 };
 
+const TextureFormat FORMAT_DXT1 = {
+  .glInternalFormat = GL_COMPRESSED_RGB_S3TC_DXT1_EXT,
+  .glFormat = GL_COMPRESSED_RGB_S3TC_DXT1_EXT,
+  .compressed = 1,
+  .blockBytes = 8
+};
+
+const TextureFormat FORMAT_DXT3 = {
+  .glInternalFormat = GL_COMPRESSED_RGBA_S3TC_DXT3_EXT,
+  .glFormat = GL_COMPRESSED_RGBA_S3TC_DXT3_EXT,
+  .compressed = 1,
+  .blockBytes = 16
+};
+
+const TextureFormat FORMAT_DXT5 = {
+  .glInternalFormat = GL_COMPRESSED_RGBA_S3TC_DXT5_EXT,
+  .glFormat = GL_COMPRESSED_RGBA_S3TC_DXT5_EXT,
+  .compressed = 1,
+  .blockBytes = 16
+};
+
 TextureData* lovrTextureDataGetBlank(int width, int height, uint8_t value, TextureFormat format) {
   TextureData* textureData = malloc(sizeof(TextureData));
   if (!textureData) return NULL;

src/loaders/texture.h

@@ -11,7 +11,7 @@ typedef struct {
   int compressed;
 } TextureFormat;
 
-extern const TextureFormat FORMAT_RGB, FORMAT_RGBA;
+extern const TextureFormat FORMAT_RGB, FORMAT_RGBA, FORMAT_DXT1, FORMAT_DXT3, FORMAT_DXT5;
 
 typedef struct {