Add rlImGuiImageFit function

README.md

@@ -65,6 +65,7 @@ void rlImGuiImage(const Texture *image);
 void rlImGuiImageSize(const Texture *image, int width, int height);
 void rlImGuiImageSizeV(const Texture* image, Vector2 size);
 void rlImGuiImageRect(const Texture* image, int destWidth, int destHeight, Rectangle sourceRect);
+void rlImGuiImageFit(const Texture* image, bool center);
 void rlImGuiImageRenderTexture(const RenderTexture* image);
 void rlImGuiImageRenderTextureFit(const RenderTexture* image, bool center);
 

rlImGui.cpp

@@ -609,6 +609,37 @@ void rlImGuiImageRect(const Texture* image, int destWidth, int destHeight, Recta
     ImGui::Image((ImTextureID)image->id, ImVec2(float(destWidth), float(destHeight)), uv0, uv1);
 }
 
+void rlImGuiImageFit(const Texture* image, bool center)
+{
+    if (!image)
+        return;
+
+    if (GlobalContext)
+        ImGui::SetCurrentContext(GlobalContext);
+
+    ImVec2 area = ImGui::GetContentRegionAvail();
+
+    float scale =  area.x / image->width;
+
+    float y = image->height * scale;
+    if (y > area.y)
+    {
+        scale = area.y / image->height;
+    }
+
+    int sizeX = int(image->width * scale);
+    int sizeY = int(image->height * scale);
+
+    if (center)
+    {
+        ImGui::SetCursorPosX(0);
+        ImGui::SetCursorPosX(area.x/2 - sizeX/2);
+        ImGui::SetCursorPosY(ImGui::GetCursorPosY() + (area.y / 2 - sizeY / 2));
+    }
+
+    rlImGuiImageRect(image, sizeX, sizeY, Rectangle{ 0,0, float(image->width), float(image->height) });
+}
+
 void rlImGuiImageRenderTexture(const RenderTexture* image)
 {
     if (!image)

rlImGui.h

@@ -159,6 +159,14 @@ RLIMGUIAPI void rlImGuiImageSizeV(const Texture* image, Vector2 size);
 /// <param name="sourceRect">The portion of the texture to draw as an image. Negative values for the width and height will flip the image</param>
 RLIMGUIAPI void rlImGuiImageRect(const Texture* image, int destWidth, int destHeight, Rectangle sourceRect);
 
+/// <summary>
+/// Draws a texture as an image an ImGui Context
+/// Fits the texture to the available content area
+/// </summary>
+/// <param name="image">The texture to draw</param>
+/// <param name="center">When true the image will be centered in the content area</param>
+RLIMGUIAPI void rlImGuiImageFit(const Texture* image, bool center);
+
 /// <summary>
 /// Draws a render texture as an image an ImGui Context, automatically flipping the Y axis so it will show correctly on screen
 /// </summary>