From 5db32f367a4afce2460b6be86f6b4b0629a433b0 Mon Sep 17 00:00:00 2001
From: Gregory Wells <me@gregorywells.dev>
Date: Mon, 18 Aug 2025 20:24:17 -0400
Subject: [PATCH] OpenGL texture API

---
 .../apis/opengl/loader/opengl_device_loader.c |  7 ++--
 .../apis/opengl/src/textures/opengl_texture.c | 34 +++++++++++++++++++
 .../apis/opengl/src/textures/opengl_texture.h |  4 +++
 3 files changed, 42 insertions(+), 3 deletions(-)
 create mode 100644 projects/apis/opengl/src/textures/opengl_texture.c

diff --git a/projects/apis/opengl/loader/opengl_device_loader.c b/projects/apis/opengl/loader/opengl_device_loader.c
index 9e2b0bd..d3edbce 100644
--- a/projects/apis/opengl/loader/opengl_device_loader.c
+++ b/projects/apis/opengl/loader/opengl_device_loader.c
@@ -7,6 +7,7 @@
 #include "uniforms/uniform/opengl_uniform.h"
 #include "commands/pool/opengl_command_pool.h"
 #include "buffer/opengl_buffer.h"
+#include "textures/opengl_texture.h"
 
 gnDeviceFunctions loadOpenGLDeviceFunctions() {
     return (gnDeviceFunctions){
@@ -44,9 +45,9 @@ gnDeviceFunctions loadOpenGLDeviceFunctions() {
         ._gnUpdateStorageUniform = openglUpdateStorageUniform,
         ._gnUpdateImageUniform = openglUpdateImageUniform,
 
-        ._gnCreateTexture = NULL,
-        ._gnTextureData = NULL,
-        ._gnDestroyTexture = NULL,
+        ._gnCreateTexture = openglCreateTexture,
+        ._gnTextureData = openglTextureData,
+        ._gnDestroyTexture = openglDestroyTexture,
 
         ._gnSubmit = NULL,
         ._gnPresent = NULL,
diff --git a/projects/apis/opengl/src/textures/opengl_texture.c b/projects/apis/opengl/src/textures/opengl_texture.c
new file mode 100644
index 0000000..8663472
--- /dev/null
+++ b/projects/apis/opengl/src/textures/opengl_texture.c
@@ -0,0 +1,34 @@
+#include "opengl_texture.h"
+#include "surface/opengl_surface.h"
+
+GLenum GryphnTargetToOpenGL(gnTextureType type) {
+    switch(type) {
+    case GN_TEXTURE_2D: return GL_TEXTURE_2D;
+    }
+}
+
+gnReturnCode openglCreateTexture(gnTexture texture, gnDevice device, const gnTextureInfo info) {
+    texture->texture = malloc(sizeof(gnPlatformTexture));
+    glCreateTextures(GryphnTargetToOpenGL(info.type), 1, &texture->texture->id);
+    glTextureStorage2D(
+        texture->texture->id,
+        1,
+        glGryphnFormatToOpenGLInternalFormat(info.format),
+        info.extent.x, info.extent.y
+    );
+    return GN_SUCCESS;
+}
+void openglTextureData(gnTextureHandle texture, void* pixelData) {
+    glTextureSubImage2D(
+        texture->texture->id,
+    	0,
+    	0, 0,
+    	texture->info.extent.x, texture->info.extent.y,
+    	GL_RGBA,
+    	GL_UNSIGNED_BYTE,
+    	pixelData
+    );
+}
+void openglDestroyTexture(gnTexture texture) {
+
+}
diff --git a/projects/apis/opengl/src/textures/opengl_texture.h b/projects/apis/opengl/src/textures/opengl_texture.h
index 8cc3256..c861338 100644
--- a/projects/apis/opengl/src/textures/opengl_texture.h
+++ b/projects/apis/opengl/src/textures/opengl_texture.h
@@ -5,3 +5,7 @@
 typedef struct gnPlatformTexture_t {
     GLuint id;
 } gnPlatformTexture;
+
+gnReturnCode openglCreateTexture(gnTexture texture, gnDevice device, const gnTextureInfo info);
+void openglTextureData(gnTextureHandle texture, void* pixelData);
+void openglDestroyTexture(gnTexture texture);