From ebaad0f35a1af5ba4d77501f38b9a542af9de129 Mon Sep 17 00:00:00 2001
From: Connor McLaughlin <stenzek@gmail.com>
Date: Fri, 25 Dec 2020 18:01:39 +1000
Subject: [PATCH] Common/GL: Add replace method to texture

---
 src/common/gl/texture.cpp | 14 +++++++++++++-
 src/common/gl/texture.h   |  1 +
 2 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/src/common/gl/texture.cpp b/src/common/gl/texture.cpp
index 416c40d23..065991cc3 100644
--- a/src/common/gl/texture.cpp
+++ b/src/common/gl/texture.cpp
@@ -36,6 +36,7 @@ bool Texture::Create(u32 width, u32 height, u32 samples, GLenum internal_format,
 
   if (samples > 1)
   {
+    Assert(!data);
     if (GLAD_GL_ARB_texture_storage || GLAD_GL_ES_VERSION_3_1)
       glTexStorage2DMultisample(target, samples, internal_format, width, height, GL_FALSE);
     else
@@ -43,7 +44,7 @@ bool Texture::Create(u32 width, u32 height, u32 samples, GLenum internal_format,
   }
   else
   {
-    if (GLAD_GL_ARB_texture_storage || GLAD_GL_ES_VERSION_3_0)
+    if ((GLAD_GL_ARB_texture_storage || GLAD_GL_ES_VERSION_3_0) && !data)
       glTexStorage2D(target, 1, internal_format, width, height);
     else
       glTexImage2D(target, 0, internal_format, width, height, 0, format, type, data);
@@ -74,6 +75,17 @@ bool Texture::Create(u32 width, u32 height, u32 samples, GLenum internal_format,
   return true;
 }
 
+void Texture::Replace(u32 width, u32 height, GLenum internal_format, GLenum format, GLenum type, const void* data)
+{
+  Assert(IsValid() && m_samples == 1);
+
+  m_width = width;
+  m_height = height;
+
+  glBindTexture(GL_TEXTURE_2D, m_id);
+  glTexImage2D(GL_TEXTURE_2D, 0, internal_format, width, height, 0, format, type, data);
+}
+
 void Texture::SetLinearFilter(bool enabled)
 {
   Assert(!IsMultisampled());
diff --git a/src/common/gl/texture.h b/src/common/gl/texture.h
index 3a8102fda..1a7016a09 100644
--- a/src/common/gl/texture.h
+++ b/src/common/gl/texture.h
@@ -12,6 +12,7 @@ public:
 
   bool Create(u32 width, u32 height, u32 samples, GLenum internal_format, GLenum format, GLenum type,
               const void* data = nullptr, bool linear_filter = false, bool wrap = false);
+  void Replace(u32 width, u32 height, GLenum internal_format, GLenum format, GLenum type, const void* data);
   bool CreateFramebuffer();
 
   void Destroy();