From 44bca81fdd5ac809b1c084aea304fb770d3ca2c6 Mon Sep 17 00:00:00 2001
From: Arkadiusz Lach <[EMAIL REDACTED]>
Date: Sat, 25 Jan 2025 01:36:57 +0100
Subject: [PATCH] Change default texture scale mode per renderer
* SDL_SetDefaultTextureScaleMode(SDL_Renderer *renderer, SDL_ScaleMode scale_mode)
* SDL_GetDefaultTextureScaleMode(SDL_Renderer *renderer, SDL_ScaleMode *scale_mode)
---
include/SDL3/SDL_render.h | 35 +++++++++++++++++++++++++++++++++++
src/render/SDL_render.c | 27 ++++++++++++++++++++++++++-
src/render/SDL_sysrender.h | 3 +++
3 files changed, 64 insertions(+), 1 deletion(-)
diff --git a/include/SDL3/SDL_render.h b/include/SDL3/SDL_render.h
index 3352545d4bd0d..de3eca228107e 100644
--- a/include/SDL3/SDL_render.h
+++ b/include/SDL3/SDL_render.h
@@ -2637,6 +2637,41 @@ extern SDL_DECLSPEC bool SDLCALL SDL_RenderDebugText(SDL_Renderer *renderer, flo
*/
extern SDL_DECLSPEC bool SDLCALL SDL_RenderDebugTextFormat(SDL_Renderer *renderer, float x, float y, SDL_PRINTF_FORMAT_STRING const char *fmt, ...) SDL_PRINTF_VARARG_FUNC(4);
+/**
+ * Set default scale mode for new textures for given renderer.
+ *
+ * When a renderer is created, scale_mode defaults to SDL_SCALEMODE_LINEAR.
+ *
+ * \param renderer the renderer to update.
+ * \param scale_mode the scale mode to change to for new textures.
+ * \returns true on success or false on failure; call SDL_GetError() for more
+ * information.
+ *
+ * \threadsafety This function should only be called on the main thread.
+ *
+ * \since This function is available since SDL 3.4.0.
+ *
+ * \sa SDL_GetDefaultTextureScaleMode
+ */
+extern SDL_DECLSPEC bool SDLCALL SDL_SetDefaultTextureScaleMode(SDL_Renderer *renderer, SDL_ScaleMode scale_mode);
+
+/**
+ * Get default texture scale mode of the given renderer.
+ *
+ * \param renderer the renderer to get data from.
+ * \param scale_mode a SDL_ScaleMode filled with current default scale mode.
+ * See SDL_SetDefaultTextureScaleMode() for the meaning of the value.
+ * \returns true on success or false on failure; call SDL_GetError() for more
+ * information.
+ *
+ * \threadsafety This function should only be called on the main thread.
+ *
+ * \since This function is available since SDL 3.4.0.
+ *
+ * \sa SDL_SetDefaultTextureScaleMode
+ */
+extern SDL_DECLSPEC bool SDLCALL SDL_GetDefaultTextureScaleMode(SDL_Renderer *renderer, SDL_ScaleMode *scale_mode);
+
/* Ends C function definitions when using C++ */
#ifdef __cplusplus
}
diff --git a/src/render/SDL_render.c b/src/render/SDL_render.c
index a66552f36c34e..ff2e54d2235cc 100644
--- a/src/render/SDL_render.c
+++ b/src/render/SDL_render.c
@@ -1081,6 +1081,8 @@ SDL_Renderer *SDL_CreateRendererWithProperties(SDL_PropertiesID props)
renderer->line_method = SDL_GetRenderLineMethod();
}
+ renderer->scale_mode = SDL_SCALEMODE_LINEAR;
+
renderer->SDR_white_point = 1.0f;
renderer->HDR_headroom = 1.0f;
renderer->desired_color_scale = 1.0f;
@@ -1392,7 +1394,7 @@ SDL_Texture *SDL_CreateTextureWithProperties(SDL_Renderer *renderer, SDL_Propert
texture->color.b = 1.0f;
texture->color.a = 1.0f;
texture->blendMode = SDL_ISPIXELFORMAT_ALPHA(format) ? SDL_BLENDMODE_BLEND : SDL_BLENDMODE_NONE;
- texture->scaleMode = SDL_SCALEMODE_LINEAR;
+ texture->scaleMode = renderer->scale_mode;
texture->view.pixel_w = w;
texture->view.pixel_h = h;
texture->view.viewport.w = -1;
@@ -5674,3 +5676,26 @@ bool SDL_RenderDebugTextFormat(SDL_Renderer *renderer, float x, float y, SDL_PRI
SDL_free(str);
return retval;
}
+
+bool SDL_SetDefaultTextureScaleMode(SDL_Renderer *renderer, SDL_ScaleMode scale_mode)
+{
+ CHECK_RENDERER_MAGIC(renderer, false);
+
+ renderer->scale_mode = scale_mode;
+
+ return true;
+}
+
+bool SDL_GetDefaultTextureScaleMode(SDL_Renderer *renderer, SDL_ScaleMode *scale_mode)
+{
+ if (scale_mode) {
+ *scale_mode = SDL_SCALEMODE_LINEAR;
+ }
+
+ CHECK_RENDERER_MAGIC(renderer, false);
+
+ if (scale_mode) {
+ *scale_mode = renderer->scale_mode;
+ }
+ return true;
+}
diff --git a/src/render/SDL_sysrender.h b/src/render/SDL_sysrender.h
index 9d39dfd3a55e6..4d87ad6a06790 100644
--- a/src/render/SDL_sysrender.h
+++ b/src/render/SDL_sysrender.h
@@ -264,6 +264,9 @@ struct SDL_Renderer
// The method of drawing lines
SDL_RenderLineMethod line_method;
+ // Default scale mode for textures created with this renderer
+ SDL_ScaleMode scale_mode;
+
// The list of textures
SDL_Texture *textures;
SDL_Texture *target;