Clip invisible parts of image when drawing in 2D textures and GLSL Modes

This commit avoids draw of invisible parts of image in image editor,
making it faster to re-draw the image.

Especially handy when painting on a high-res image when zoomed-in.

1 files changed, 18 insertions, 0 deletions

diff --git a/source/blender/editors/include/BIF_glutil.h b/source/blender/editors/include/BIF_glutil.h
index e45e5f5e7ab..0ac5c17a552 100644
--- a/source/blender/editors/include/BIF_glutil.h
+++ b/source/blender/editors/include/BIF_glutil.h
@@ -143,6 +143,8 @@ void glaDrawPixelsSafe(float x, float y, int img_w, int img_h, int row_w, int fo
  */
 
 void glaDrawPixelsTex(float x, float y, int img_w, int img_h, int format, int type, int zoomfilter, void *rect);
+void glaDrawPixelsTex_clipping(float x, float y, int img_w, int img_h, int format, int type, int zoomfilter, void *rect,
+                               float clip_min_x, float clip_min_y, float clip_max_x, float clip_max_y);
 
 /**
  * glaDrawPixelsAuto - Switches between texture or pixel drawing using UserDef.
@@ -150,9 +152,13 @@ void glaDrawPixelsTex(float x, float y, int img_w, int img_h, int format, int ty
  * needs glaDefine2DArea to be set.
  */
 void glaDrawPixelsAuto(float x, float y, int img_w, int img_h, int format, int type, int zoomfilter, void *rect);
+void glaDrawPixelsAuto_clipping(float x, float y, int img_w, int img_h, int format, int type, int zoomfilter, void *rect,
+                                float clip_min_x, float clip_min_y, float clip_max_x, float clip_max_y);
 
 
 void glaDrawPixelsTexScaled(float x, float y, int img_w, int img_h, int format, int type, int zoomfilter, void *rect, float scaleX, float scaleY);
+void glaDrawPixelsTexScaled_clipping(float x, float y, int img_w, int img_h, int format, int type, int zoomfilter, void *rect, float scaleX, float scaleY,
+                                     float clip_min_x, float clip_min_y, float clip_max_x, float clip_max_y);
 
 /* 2D Drawing Assistance */
 
@@ -205,9 +211,21 @@ void bgl_get_mats(bglMats *mats);
 void glaDrawImBuf_glsl(struct ImBuf *ibuf, float x, float y, int zoomfilter,
                        struct ColorManagedViewSettings *view_settings,
                        struct ColorManagedDisplaySettings *display_settings);
+void glaDrawImBuf_glsl_clipping(struct ImBuf *ibuf, float x, float y, int zoomfilter,
+                                struct ColorManagedViewSettings *view_settings,
+                                struct ColorManagedDisplaySettings *display_settings,
+                                float clip_min_x, float clip_min_y,
+                                float clip_max_x, float clip_max_y);
+
 
 /* Draw imbuf on a screen, preferably using GLSL display transform */
 void glaDrawImBuf_glsl_ctx(const struct bContext *C, struct ImBuf *ibuf, float x, float y, int zoomfilter);
+void glaDrawImBuf_glsl_ctx_clipping(const struct bContext *C,
+                                    struct ImBuf *ibuf,
+                                    float x, float y,
+                                    int zoomfilter,
+                                    float clip_min_x, float clip_min_y,
+                                    float clip_max_x, float clip_max_y);
 
 void glaDrawBorderCorners(const struct rcti *border, float zoomx, float zoomy);