Cleanup: remove unused OpenGL functions, rename some for clarity

5 files changed, 102 insertions, 156 deletions

diff --git a/source/blender/editors/include/BIF_glutil.h b/source/blender/editors/include/BIF_glutil.h
index a2e8d6afd4b..c30674907da 100644
--- a/source/blender/editors/include/BIF_glutil.h
+++ b/source/blender/editors/include/BIF_glutil.h
@@ -32,35 +32,6 @@ struct ColorManagedViewSettings;
 struct ImBuf;
 struct bContext;
 
-/* A few functions defined here are being DEPRECATED for Blender 2.8
- *
- * Do not use them in new code, and you are encouraged to
- * convert existing code to draw without these.
- *
- * These will be deleted before we ship 2.8!
- * - merwin
- */
-
-/**
- * Returns a float value as obtained by glGetFloatv.
- * The param must cause only one value to be gotten from GL.
- */
-float glaGetOneFloat(int param);
-int glaGetOneInt(int param);
-
-/**
- * Functions like glRasterPos2i, except ensures that the resulting
- * raster position is valid. \a known_good_x and \a known_good_y
- * should be coordinates of a point known to be within the current
- * view frustum.
- * \attention This routine should be used when the distance of \a x
- * and \a y away from the known good point is small (ie. for small icons
- * and for bitmap characters), when drawing large+zoomed images it is
- * possible for overflow to occur, the glaDrawPixelsSafe routine should
- * be used instead.
- */
-void glaRasterPosSafe2f(float x, float y, float known_good_x, float known_good_y);
-
 typedef struct IMMDrawPixelsTexState {
   struct GPUShader *shader;
   unsigned int pos;
@@ -148,29 +119,47 @@ void immDrawPixelsTexScaled_clipping(IMMDrawPixelsTexState *state,
                                      float yzoom,
                                      float color[4]);
 
-void set_inverted_drawing(int enable);
-
-/* own working polygon offset */
-float bglPolygonOffsetCalc(const float winmat[16], float viewdist, float dist);
-void bglPolygonOffset(float viewdist, float dist);
-
-/* **** Color management helper functions for GLSL display/transform ***** */
-
-/* Draw imbuf on a screen, preferably using GLSL display transform */
-void glaDrawImBuf_glsl(struct ImBuf *ibuf,
+/* Image buffer drawing functions, with display transform
+ *
+ * The view and display settings can either be specified manually, or retrived
+ * from the context with the _ctx variations.
+ *
+ * For better performance clipping coordinates can be specified so parts of the
+ * image outside the view are skipped. */
+
+void ED_draw_imbuf(struct ImBuf *ibuf,
+                   float x,
+                   float y,
+                   int zoomfilter,
+                   struct ColorManagedViewSettings *view_settings,
+                   struct ColorManagedDisplaySettings *display_settings,
+                   float zoom_x,
+                   float zoom_y);
+void ED_draw_imbuf_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,
+                            float zoom_x,
+                            float zoom_y);
+
+void ED_draw_imbuf_ctx(const struct bContext *C,
+                       struct ImBuf *ibuf,
                        float x,
                        float y,
                        int zoomfilter,
-                       struct ColorManagedViewSettings *view_settings,
-                       struct ColorManagedDisplaySettings *display_settings,
                        float zoom_x,
                        float zoom_y);
-void glaDrawImBuf_glsl_clipping(struct ImBuf *ibuf,
+void ED_draw_imbuf_ctx_clipping(const struct bContext *C,
+                                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,
@@ -178,25 +167,14 @@ void glaDrawImBuf_glsl_clipping(struct ImBuf *ibuf,
                                 float zoom_x,
                                 float zoom_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,
-                           float zoom_x,
-                           float zoom_y);
-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,
-                                    float zoom_x,
-                                    float zoom_y);
+/* OpenGL drawing utility functions. Do not use these in new code, these
+ * are intended to be moved or removed in the future. */
+
+void set_inverted_drawing(int enable);
+
+/* own working polygon offset */
+float bglPolygonOffsetCalc(const float winmat[16], float viewdist, float dist);
+void bglPolygonOffset(float viewdist, float dist);
 
 void immDrawBorderCorners(unsigned int pos, const struct rcti *border, float zoomx, float zoomy);
 
diff --git a/source/blender/editors/screen/glutil.c b/source/blender/editors/screen/glutil.c
index 7fec62157c1..868bc982c51 100644
--- a/source/blender/editors/screen/glutil.c
+++ b/source/blender/editors/screen/glutil.c
@@ -58,37 +58,6 @@ void set_inverted_drawing(int enable)
   GL_TOGGLE(GL_DITHER, !enable);
 }
 
-float glaGetOneFloat(int param)
-{
-  GLfloat v;
-  glGetFloatv(param, &v);
-  return v;
-}
-
-int glaGetOneInt(int param)
-{
-  GLint v;
-  glGetIntegerv(param, &v);
-  return v;
-}
-
-void glaRasterPosSafe2f(float x, float y, float known_good_x, float known_good_y)
-{
-  GLubyte dummy = 0;
-
-  /* As long as known good coordinates are correct
-   * this is guaranteed to generate an ok raster
-   * position (ignoring potential (real) overflow
-   * issues).
-   */
-  glRasterPos2f(known_good_x, known_good_y);
-
-  /* Now shift the raster position to where we wanted
-   * it in the first place using the glBitmap trick.
-   */
-  glBitmap(0, 0, 0, 0, x - known_good_x, y - known_good_y, &dummy);
-}
-
 static int get_cached_work_texture(int *r_w, int *r_h)
 {
   static GLint texid = -1;
@@ -564,18 +533,18 @@ void bglPolygonOffset(float viewdist, float dist)
 /* **** Color management helper functions for GLSL display/transform ***** */
 
 /* Draw given image buffer on a screen using GLSL for display transform */
-void glaDrawImBuf_glsl_clipping(ImBuf *ibuf,
-                                float x,
-                                float y,
-                                int zoomfilter,
-                                ColorManagedViewSettings *view_settings,
-                                ColorManagedDisplaySettings *display_settings,
-                                float clip_min_x,
-                                float clip_min_y,
-                                float clip_max_x,
-                                float clip_max_y,
-                                float zoom_x,
-                                float zoom_y)
+void ED_draw_imbuf_clipping(ImBuf *ibuf,
+                            float x,
+                            float y,
+                            int zoomfilter,
+                            ColorManagedViewSettings *view_settings,
+                            ColorManagedDisplaySettings *display_settings,
+                            float clip_min_x,
+                            float clip_min_y,
+                            float clip_max_x,
+                            float clip_max_y,
+                            float zoom_x,
+                            float zoom_y)
 {
   bool force_fallback = false;
   bool need_fallback = true;
@@ -702,65 +671,64 @@ void glaDrawImBuf_glsl_clipping(ImBuf *ibuf,
   }
 }
 
-void glaDrawImBuf_glsl(ImBuf *ibuf,
-                       float x,
-                       float y,
-                       int zoomfilter,
-                       ColorManagedViewSettings *view_settings,
-                       ColorManagedDisplaySettings *display_settings,
-                       float zoom_x,
-                       float zoom_y)
+void ED_draw_imbuf(ImBuf *ibuf,
+                   float x,
+                   float y,
+                   int zoomfilter,
+                   ColorManagedViewSettings *view_settings,
+                   ColorManagedDisplaySettings *display_settings,
+                   float zoom_x,
+                   float zoom_y)
 {
-  glaDrawImBuf_glsl_clipping(ibuf,
-                             x,
-                             y,
-                             zoomfilter,
-                             view_settings,
-                             display_settings,
-                             0.0f,
-                             0.0f,
-                             0.0f,
-                             0.0f,
-                             zoom_x,
-                             zoom_y);
+  ED_draw_imbuf_clipping(ibuf,
+                         x,
+                         y,
+                         zoomfilter,
+                         view_settings,
+                         display_settings,
+                         0.0f,
+                         0.0f,
+                         0.0f,
+                         0.0f,
+                         zoom_x,
+                         zoom_y);
 }
 
-void glaDrawImBuf_glsl_ctx_clipping(const bContext *C,
-                                    ImBuf *ibuf,
-                                    float x,
-                                    float y,
-                                    int zoomfilter,
-                                    float clip_min_x,
-                                    float clip_min_y,
-                                    float clip_max_x,
-                                    float clip_max_y,
-                                    float zoom_x,
-                                    float zoom_y)
+void ED_draw_imbuf_ctx_clipping(const bContext *C,
+                                ImBuf *ibuf,
+                                float x,
+                                float y,
+                                int zoomfilter,
+                                float clip_min_x,
+                                float clip_min_y,
+                                float clip_max_x,
+                                float clip_max_y,
+                                float zoom_x,
+                                float zoom_y)
 {
   ColorManagedViewSettings *view_settings;
   ColorManagedDisplaySettings *display_settings;
 
   IMB_colormanagement_display_settings_from_ctx(C, &view_settings, &display_settings);
 
-  glaDrawImBuf_glsl_clipping(ibuf,
-                             x,
-                             y,
-                             zoomfilter,
-                             view_settings,
-                             display_settings,
-                             clip_min_x,
-                             clip_min_y,
-                             clip_max_x,
-                             clip_max_y,
-                             zoom_x,
-                             zoom_y);
+  ED_draw_imbuf_clipping(ibuf,
+                         x,
+                         y,
+                         zoomfilter,
+                         view_settings,
+                         display_settings,
+                         clip_min_x,
+                         clip_min_y,
+                         clip_max_x,
+                         clip_max_y,
+                         zoom_x,
+                         zoom_y);
 }
 
-void glaDrawImBuf_glsl_ctx(
+void ED_draw_imbuf_ctx(
     const bContext *C, ImBuf *ibuf, float x, float y, int zoomfilter, float zoom_x, float zoom_y)
 {
-  glaDrawImBuf_glsl_ctx_clipping(
-      C, ibuf, x, y, zoomfilter, 0.0f, 0.0f, 0.0f, 0.0f, zoom_x, zoom_y);
+  ED_draw_imbuf_ctx_clipping(C, ibuf, x, y, zoomfilter, 0.0f, 0.0f, 0.0f, 0.0f, zoom_x, zoom_y);
 }
 
 /* don't move to GPU_immediate_util.h because this uses user-prefs
diff --git a/source/blender/editors/space_clip/clip_draw.c b/source/blender/editors/space_clip/clip_draw.c
index a3aa4f4bed5..dbc37fc6727 100644
--- a/source/blender/editors/space_clip/clip_draw.c
+++ b/source/blender/editors/space_clip/clip_draw.c
@@ -341,7 +341,7 @@ static void draw_movieclip_buffer(const bContext *C,
     filter = GL_NEAREST;
   }
 
-  glaDrawImBuf_glsl_ctx(C, ibuf, x, y, filter, zoomx * width / ibuf->x, zoomy * height / ibuf->y);
+  ED_draw_imbuf_ctx(C, ibuf, x, y, filter, zoomx * width / ibuf->x, zoomy * height / ibuf->y);
 
   if (ibuf->planes == 32) {
     GPU_blend(false);
diff --git a/source/blender/editors/space_image/image_draw.c b/source/blender/editors/space_image/image_draw.c
index a87808e1601..3baee1d723b 100644
--- a/source/blender/editors/space_image/image_draw.c
+++ b/source/blender/editors/space_image/image_draw.c
@@ -575,7 +575,7 @@ static void draw_image_buffer(const bContext *C,
     /* If RGBA display with color management */
     if ((sima->flag & (SI_SHOW_R | SI_SHOW_G | SI_SHOW_B | SI_SHOW_ALPHA)) == 0) {
 
-      glaDrawImBuf_glsl_ctx_clipping(
+      ED_draw_imbuf_ctx_clipping(
           C, ibuf, x, y, GL_NEAREST, 0, 0, clip_max_x, clip_max_y, zoomx, zoomy);
     }
     else {
diff --git a/source/blender/editors/space_node/drawnode.c b/source/blender/editors/space_node/drawnode.c
index 327aa94ca3e..eb9c1cc2965 100644
--- a/source/blender/editors/space_node/drawnode.c
+++ b/source/blender/editors/space_node/drawnode.c
@@ -3481,12 +3481,12 @@ void draw_nodespace_back_pix(const bContext *C,
         GPU_blend_set_func_separate(
             GPU_SRC_ALPHA, GPU_ONE_MINUS_SRC_ALPHA, GPU_ONE, GPU_ONE_MINUS_SRC_ALPHA);
 
-        glaDrawImBuf_glsl_ctx(C, ibuf, x, y, GL_NEAREST, snode->zoom, snode->zoom);
+        ED_draw_imbuf_ctx(C, ibuf, x, y, GL_NEAREST, snode->zoom, snode->zoom);
 
         GPU_blend(false);
       }
       else {
-        glaDrawImBuf_glsl_ctx(C, ibuf, x, y, GL_NEAREST, snode->zoom, snode->zoom);
+        ED_draw_imbuf_ctx(C, ibuf, x, y, GL_NEAREST, snode->zoom, snode->zoom);
       }
 
       if (cache_handle) {