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authordec05eba <dec05eba@protonmail.com>2021-10-12 21:09:53 +0200
committerdec05eba <dec05eba@protonmail.com>2021-10-12 21:09:53 +0200
commit08dcbfa7772149bcdcc0ab660a897853a30103a0 (patch)
treec3789dadef191e8942993d1e8fcafc266377ed8a /src/graphics
parent4aa7273eea642bff78477b0b220c7056628b13a8 (diff)
compressed texture
Diffstat (limited to 'src/graphics')
-rw-r--r--src/graphics/texture.c13
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);