Changes for opengl render to reflect new alpha premul pipeline

without hurting quick texture painting

- ED_view3d_draw_offscreen will now output buffer with
  transparent alpha, if sky needed it should be alpha-undered
  later.

- ED_view3d_draw_offscreen_imbuf now accepts alpha mode as an
  argument which could be either R_ADDSKY or R_PREMULALPHA

- OpenGL render and sequencer's opengl preview will now reflect
  scene's Alpha Mode

- Quick Edit will use OpenGL with transparent alpha mode

1 files changed, 3 insertions, 0 deletions

diff --git a/source/blender/imbuf/IMB_imbuf.h b/source/blender/imbuf/IMB_imbuf.h
index 850060ef4d5..8d60227377b 100644
--- a/source/blender/imbuf/IMB_imbuf.h
+++ b/source/blender/imbuf/IMB_imbuf.h
@@ -416,6 +416,9 @@ void nearest_interpolation_color(struct ImBuf *in, unsigned char col[4], float c
 void bilinear_interpolation_color(struct ImBuf *in, unsigned char col[4], float col_float[4], float u, float v);
 void bilinear_interpolation_color_wrap(struct ImBuf *in, unsigned char col[4], float col_float[4], float u, float v);
 
+void IMB_alpha_under_color_float(float *rect_float, int x, int y, float backcol[3]);
+void IMB_alpha_under_color_byte(unsigned char *rect, int x, int y, float backcol[3]);
+
 /**
  *
  * \attention defined in readimage.c