blender
/
blender
129
398
Fork 572
Code Issues 6.2k Pull Requests 746 Projects 19 Wiki Activity

use new immediate mode for UI_draw_box_shadow 

This serves as a good example of the Gawain API. (I’ve thought of a
better way to draw drop shadows, but that can wait!)

Part of T49043.

This is what I had in mind for D1753.
This commit is contained in:
Mike Erwin 2016-08-11 01:06:17 -04:00
parent 7664d947b3
commit 4565f3d0c8
1 changed files with 36 additions and 26 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

62
source/blender/editors/interface/interface_draw.c
View File

@ -57,6 +57,8 @@
#include "GPU_draw.h"
#include "GPU_basic_shader.h"
#include "GPU_shader.h"
#include "GPU_immediate.h"
#include "UI_interface.h"
@ -1668,46 +1670,54 @@ void ui_draw_but_NODESOCKET(ARegion *ar, uiBut *but, uiWidgetColors *UNUSED(wcol
/* ****************************************************** */
static void ui_shadowbox(float minx, float miny, float maxx, float maxy, float shadsize, unsigned char alpha)
static void ui_shadowbox(unsigned pos, unsigned color, float minx, float miny, float maxx, float maxy, float shadsize, unsigned char alpha)
{
/* right quad */
glColor4ub(0, 0, 0, alpha);
glVertex2f(maxx, miny);
glVertex2f(maxx, maxy - 0.3f * shadsize);
glColor4ub(0, 0, 0, 0);
glVertex2f(maxx + shadsize, maxy - 0.75f * shadsize);
glVertex2f(maxx + shadsize, miny);
immAttrib4ub(color, 0, 0, 0, alpha);
immVertex2f(pos, maxx, miny);
immVertex2f(pos, maxx, maxy - 0.3f * shadsize);
immAttrib4ub(color, 0, 0, 0, 0);
immVertex2f(pos, maxx + shadsize, maxy - 0.75f * shadsize);
immVertex2f(pos, maxx + shadsize, miny);
/* corner shape */
glColor4ub(0, 0, 0, alpha);
glVertex2f(maxx, miny);
glColor4ub(0, 0, 0, 0);
glVertex2f(maxx + shadsize, miny);
glVertex2f(maxx + 0.7f * shadsize, miny - 0.7f * shadsize);
glVertex2f(maxx, miny - shadsize);
immAttrib4ub(color, 0, 0, 0, alpha);
immVertex2f(pos, maxx, miny);
immAttrib4ub(color, 0, 0, 0, 0);
immVertex2f(pos, maxx + shadsize, miny);
immVertex2f(pos, maxx + 0.7f * shadsize, miny - 0.7f * shadsize);
immVertex2f(pos, maxx, miny - shadsize);
/* bottom quad */
glColor4ub(0, 0, 0, alpha);
glVertex2f(minx + 0.3f * shadsize, miny);
glVertex2f(maxx, miny);
glColor4ub(0, 0, 0, 0);
glVertex2f(maxx, miny - shadsize);
glVertex2f(minx + 0.5f * shadsize, miny - shadsize);
immAttrib4ub(color, 0, 0, 0, alpha);
immVertex2f(pos, minx + 0.3f * shadsize, miny);
immVertex2f(pos, maxx, miny);
immAttrib4ub(color, 0, 0, 0, 0);
immVertex2f(pos, maxx, miny - shadsize);
immVertex2f(pos, minx + 0.5f * shadsize, miny - shadsize);
}
void UI_draw_box_shadow(unsigned char alpha, float minx, float miny, float maxx, float maxy)
{
glEnable(GL_BLEND);
glBegin(GL_QUADS);
VertexFormat *format = immVertexFormat();
unsigned pos = add_attrib(format, "pos", GL_FLOAT, 2, KEEP_FLOAT);
unsigned color = add_attrib(format, "color", GL_UNSIGNED_BYTE, 4, NORMALIZE_INT_TO_FLOAT);
immBindBuiltinProgram(GPU_SHADER_2D_SMOOTH_COLOR);
immBegin(GL_QUADS, 36);
/* accumulated outline boxes to make shade not linear, is more pleasant */
ui_shadowbox(minx, miny, maxx, maxy, 11.0, (20 * alpha) >> 8);
ui_shadowbox(minx, miny, maxx, maxy, 7.0, (40 * alpha) >> 8);
ui_shadowbox(minx, miny, maxx, maxy, 5.0, (80 * alpha) >> 8);
glEnd();
ui_shadowbox(pos, color, minx, miny, maxx, maxy, 11.0, (20 * alpha) >> 8);
ui_shadowbox(pos, color, minx, miny, maxx, maxy, 7.0, (40 * alpha) >> 8);
ui_shadowbox(pos, color, minx, miny, maxx, maxy, 5.0, (80 * alpha) >> 8);
immEnd();
immUnbindProgram();
glDisable(GL_BLEND);
}