compressed texture

1 files changed, 12 insertions, 1 deletions

diff --git a/src/graphics/texture.c b/src/graphics/texture.c
index 3d3ea6f..ebc4e58 100644
--- a/src/graphics/texture.c
+++ b/src/graphics/texture.c
@@ -19,6 +19,16 @@ static int mgl_texture_format_to_opengl_format(mgl_texture_format format) {
     return 0;
 }
 
+static int mgl_texture_format_to_compressed_opengl_format(mgl_texture_format format) {
+    switch(format) {
+        case MGL_TEXTURE_GRAY:       return GL_LUMINANCE8;
+        case MGL_TEXTURE_GRAY_ALPHA: return GL_LUMINANCE8_ALPHA8;
+        case MGL_TEXTURE_RGB:        return GL_COMPRESSED_RGB_S3TC_DXT1_EXT;
+        case MGL_TEXTURE_RGB_ALPHA:  return GL_COMPRESSED_RGBA_S3TC_DXT5_EXT;
+    }
+    return 0;
+}
+
 static int mgl_texture_format_to_source_opengl_format(mgl_texture_format format) {
     switch(format) {
         case MGL_TEXTURE_GRAY:       return GL_LUMINANCE8_ALPHA8;
@@ -30,6 +40,7 @@ static int mgl_texture_format_to_source_opengl_format(mgl_texture_format format)
 }
 
 /* TODO: Ensure texture is power of 2 if the hardware doesn't support non power of two textures */
+/* TODO: Verify if source format should always be 4 components (RGBA) because apparently if its another format then opengl will internally convert it to RGBA */
 int mgl_texture_load_from_file(mgl_texture *self, const char *filepath) {
     self->id = 0;
     
@@ -48,7 +59,7 @@ int mgl_texture_load_from_file(mgl_texture *self, const char *filepath) {
         return -1;
     }
 
-    const int opengl_texture_format = mgl_texture_format_to_opengl_format(self->format);
+    const int opengl_texture_format = mgl_texture_format_to_compressed_opengl_format(self->format);
 
     context->gl.glBindTexture(GL_TEXTURE_2D, self->id);
     context->gl.glTexImage2D(GL_TEXTURE_2D, 0, opengl_texture_format, self->width, self->height, 0, mgl_texture_format_to_source_opengl_format(self->format), GL_UNSIGNED_BYTE, image_data);