Cleanup: GPU: Use explicit clear value in GPU_clear* commands

This replace `GPU_clear()` by `GPU_clear_color()` and `GPU_clear_depth()`.
Since we always set the clear value before clearing, it is unecessary
to track the clear color state.
Moreover, it makes it clearer what we clear the framebuffer to.

3 files changed, 1 insertions, 13 deletions

diff --git a/source/blender/editors/interface/interface_panel.c b/source/blender/editors/interface/interface_panel.c
index 812aa25568a..4f3c36c0b3b 100644
--- a/source/blender/editors/interface/interface_panel.c
+++ b/source/blender/editors/interface/interface_panel.c
@@ -1442,10 +1442,6 @@ void UI_panels_end(const bContext *C, ARegion *region, int *r_x, int *r_y)
 
 void UI_panels_draw(const bContext *C, ARegion *region)
 {
-  if (region->alignment != RGN_ALIGN_FLOAT) {
-    UI_ThemeClearColor(TH_BACK);
-  }
-
   /* Draw panels, selected on top. Also in reverse order, because
    * UI blocks are added in reverse order and we need child panels
    * to draw on top. */
diff --git a/source/blender/editors/interface/interface_region_hud.c b/source/blender/editors/interface/interface_region_hud.c
index 1773a7b3057..204653f047d 100644
--- a/source/blender/editors/interface/interface_region_hud.c
+++ b/source/blender/editors/interface/interface_region_hud.c
@@ -217,8 +217,7 @@ static void hud_region_draw(const bContext *C, ARegion *region)
 {
   UI_view2d_view_ortho(&region->v2d);
   wmOrtho2_region_pixelspace(region);
-  GPU_clear_color(0, 0, 0, 0.0f);
-  GPU_clear(GPU_COLOR_BIT);
+  GPU_clear_color(0.0f, 0.0f, 0.0f, 0.0f);
 
   if ((region->flag & RGN_FLAG_HIDDEN) == 0) {
     ui_draw_menu_back(NULL,
diff --git a/source/blender/editors/interface/resources.c b/source/blender/editors/interface/resources.c
index 84fe3e13426..4c2b71514a4 100644
--- a/source/blender/editors/interface/resources.c
+++ b/source/blender/editors/interface/resources.c
@@ -1474,13 +1474,6 @@ void UI_ThemeClearColor(int colorid)
   GPU_clear_color(col[0], col[1], col[2], 1.0f);
 }
 
-void UI_ThemeClearColorAlpha(int colorid, float alpha)
-{
-  float col[3];
-  UI_GetThemeColor3fv(colorid, col);
-  GPU_clear_color(col[0], col[1], col[2], alpha);
-}
-
 int UI_ThemeMenuShadowWidth(void)
 {
   bTheme *btheme = UI_GetTheme();