From 470dac0e891c1ec59dfe52e77861cf068837976d Mon Sep 17 00:00:00 2001
From: dec05eba <dec05eba@protonmail.com>
Date: Wed, 31 Jul 2024 20:55:37 +0200
Subject: Add mipmap option

---
 src/gl.c               |  1 +
 src/graphics/sprite.c  |  8 ++++++++
 src/graphics/texture.c | 22 ++++++++++++++++++----
 3 files changed, 27 insertions(+), 4 deletions(-)

(limited to 'src')

diff --git a/src/gl.c b/src/gl.c
index adc7c89..4ac022a 100644
--- a/src/gl.c
+++ b/src/gl.c
@@ -109,6 +109,7 @@ int mgl_gl_load(mgl_gl *self) {
         { (void**)&self->glXSwapIntervalEXT, "glXSwapIntervalEXT" },
         { (void**)&self->glXSwapIntervalMESA, "glXGetSwapIntervalMESA" },
         { (void**)&self->glXSwapIntervalSGI, "glXSwapIntervalSGI" },
+        { (void**)&self->glGenerateMipmap, "glGenerateMipmap" },
 
         { NULL, NULL }
     };
diff --git a/src/graphics/sprite.c b/src/graphics/sprite.c
index 95f733b..3110cf9 100644
--- a/src/graphics/sprite.c
+++ b/src/graphics/sprite.c
@@ -47,6 +47,14 @@ void mgl_sprite_set_height(mgl_sprite *self, float height) {
     self->scale.y = self->scale.x;
 }
 
+mgl_vec2f mgl_sprite_get_size(const mgl_sprite *self) {
+    if(self->texture) {
+        return (mgl_vec2f){ (float)self->texture->width * self->scale.x, (float)self->texture->height * self->scale.y };
+    } else {
+        return (mgl_vec2f){ 0.0f, 0.0f };
+    }
+}
+
 /* TODO: Cache texture bind to not bind texture if its already bound and do not bind texture 0 */
 void mgl_sprite_draw(mgl_context *context, mgl_sprite *sprite) {
     if(!sprite->texture)
diff --git a/src/graphics/texture.c b/src/graphics/texture.c
index e098dd2..5de3d2b 100644
--- a/src/graphics/texture.c
+++ b/src/graphics/texture.c
@@ -96,22 +96,30 @@ int mgl_texture_load_from_memory(mgl_texture *self, const unsigned char *data, i
     if(width > self->max_width || height > self->max_height)
         return -1;
 
+    mgl_context *context = mgl_get_context();
+
     self->width = width;
     self->height = height;
     self->format = mgl_image_format_to_mgl_texture_format(format);
-    self->pixel_coordinates = load_options ? load_options->pixel_coordinates : false;
+    self->pixel_coordinates = load_options && load_options->pixel_coordinates;
+    self->mipmap = load_options && load_options->mipmap && context->gl.glGenerateMipmap; /* TODO: Check if glGenerateMipmap is actually available */
 
     int opengl_texture_format = mgl_texture_format_to_opengl_format(self->format);
     if(load_options && load_options->compressed)
         opengl_texture_format = mgl_texture_format_to_compressed_opengl_format(self->format);
 
-    mgl_context *context = mgl_get_context();
     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, data);
     context->gl.glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
     context->gl.glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
-    context->gl.glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
-    context->gl.glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+    if(self->mipmap) {
+        context->gl.glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+        context->gl.glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
+        context->gl.glGenerateMipmap(GL_TEXTURE_2D);
+    } else {
+        context->gl.glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+        context->gl.glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+    }
     context->gl.glBindTexture(GL_TEXTURE_2D, 0);
 
     return 0;
@@ -125,6 +133,9 @@ int mgl_texture_update(mgl_texture *self, const unsigned char *data, int offset_
     context->gl.glBindTexture(GL_TEXTURE_2D, self->id);
     const mgl_texture_format texture_format = mgl_image_format_to_mgl_texture_format(format);
     context->gl.glTexSubImage2D(GL_TEXTURE_2D, 0, offset_x, offset_y, width, height, mgl_texture_format_to_source_opengl_format(texture_format), GL_UNSIGNED_BYTE, data);
+    if(self->mipmap) {
+        context->gl.glGenerateMipmap(GL_TEXTURE_2D);
+    }
     context->gl.glBindTexture(GL_TEXTURE_2D, 0);
     return 0;
 }
@@ -147,6 +158,9 @@ int mgl_texture_resize(mgl_texture *self, int new_width, int new_height, const m
     mgl_context *context = mgl_get_context();
     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, NULL);
+    if(self->mipmap) {
+        context->gl.glGenerateMipmap(GL_TEXTURE_2D);
+    }
     context->gl.glBindTexture(GL_TEXTURE_2D, 0);
     return 0;
 }
-- 
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