diff options
Diffstat (limited to 'source/blender/editors/screen/screen_draw.c')
-rw-r--r-- | source/blender/editors/screen/screen_draw.c | 496 |
1 files changed, 496 insertions, 0 deletions
diff --git a/source/blender/editors/screen/screen_draw.c b/source/blender/editors/screen/screen_draw.c new file mode 100644 index 00000000000..52c13871925 --- /dev/null +++ b/source/blender/editors/screen/screen_draw.c @@ -0,0 +1,496 @@ +/* + * ***** BEGIN GPL LICENSE BLOCK ***** + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software Foundation, + * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + * + * ***** END GPL LICENSE BLOCK ***** + */ + +/** \file blender/editors/screen/screen_draw.c + * \ingroup edscr + */ + +#include "ED_screen.h" + +#include "GPU_framebuffer.h" +#include "GPU_immediate.h" +#include "GPU_matrix.h" + +#include "WM_api.h" +#include "WM_types.h" + +#include "screen_intern.h" + + +/** + * Draw horizontal shape visualizing future joining (left as well right direction of future joining). + */ +static void draw_horizontal_join_shape(ScrArea *sa, char dir, unsigned int pos) +{ + vec2f points[10]; + short i; + float w, h; + float width = sa->v3->vec.x - sa->v1->vec.x; + float height = sa->v3->vec.y - sa->v1->vec.y; + + if (height < width) { + h = height / 8; + w = height / 4; + } + else { + h = width / 8; + w = width / 4; + } + + points[0].x = sa->v1->vec.x; + points[0].y = sa->v1->vec.y + height / 2; + + points[1].x = sa->v1->vec.x; + points[1].y = sa->v1->vec.y; + + points[2].x = sa->v4->vec.x - w; + points[2].y = sa->v4->vec.y; + + points[3].x = sa->v4->vec.x - w; + points[3].y = sa->v4->vec.y + height / 2 - 2 * h; + + points[4].x = sa->v4->vec.x - 2 * w; + points[4].y = sa->v4->vec.y + height / 2; + + points[5].x = sa->v4->vec.x - w; + points[5].y = sa->v4->vec.y + height / 2 + 2 * h; + + points[6].x = sa->v3->vec.x - w; + points[6].y = sa->v3->vec.y; + + points[7].x = sa->v2->vec.x; + points[7].y = sa->v2->vec.y; + + points[8].x = sa->v4->vec.x; + points[8].y = sa->v4->vec.y + height / 2 - h; + + points[9].x = sa->v4->vec.x; + points[9].y = sa->v4->vec.y + height / 2 + h; + + if (dir == 'l') { + /* when direction is left, then we flip direction of arrow */ + float cx = sa->v1->vec.x + width; + for (i = 0; i < 10; i++) { + points[i].x -= cx; + points[i].x = -points[i].x; + points[i].x += sa->v1->vec.x; + } + } + + immBegin(PRIM_TRIANGLE_FAN, 5); + + for (i = 0; i < 5; i++) { + immVertex2f(pos, points[i].x, points[i].y); + } + + immEnd(); + + immBegin(PRIM_TRIANGLE_FAN, 5); + + for (i = 4; i < 8; i++) { + immVertex2f(pos, points[i].x, points[i].y); + } + + immVertex2f(pos, points[0].x, points[0].y); + immEnd(); + + immRectf(pos, points[2].x, points[2].y, points[8].x, points[8].y); + immRectf(pos, points[6].x, points[6].y, points[9].x, points[9].y); +} + +/** + * Draw vertical shape visualizing future joining (up/down direction). + */ +static void draw_vertical_join_shape(ScrArea *sa, char dir, unsigned int pos) +{ + vec2f points[10]; + short i; + float w, h; + float width = sa->v3->vec.x - sa->v1->vec.x; + float height = sa->v3->vec.y - sa->v1->vec.y; + + if (height < width) { + h = height / 4; + w = height / 8; + } + else { + h = width / 4; + w = width / 8; + } + + points[0].x = sa->v1->vec.x + width / 2; + points[0].y = sa->v3->vec.y; + + points[1].x = sa->v2->vec.x; + points[1].y = sa->v2->vec.y; + + points[2].x = sa->v1->vec.x; + points[2].y = sa->v1->vec.y + h; + + points[3].x = sa->v1->vec.x + width / 2 - 2 * w; + points[3].y = sa->v1->vec.y + h; + + points[4].x = sa->v1->vec.x + width / 2; + points[4].y = sa->v1->vec.y + 2 * h; + + points[5].x = sa->v1->vec.x + width / 2 + 2 * w; + points[5].y = sa->v1->vec.y + h; + + points[6].x = sa->v4->vec.x; + points[6].y = sa->v4->vec.y + h; + + points[7].x = sa->v3->vec.x; + points[7].y = sa->v3->vec.y; + + points[8].x = sa->v1->vec.x + width / 2 - w; + points[8].y = sa->v1->vec.y; + + points[9].x = sa->v1->vec.x + width / 2 + w; + points[9].y = sa->v1->vec.y; + + if (dir == 'u') { + /* when direction is up, then we flip direction of arrow */ + float cy = sa->v1->vec.y + height; + for (i = 0; i < 10; i++) { + points[i].y -= cy; + points[i].y = -points[i].y; + points[i].y += sa->v1->vec.y; + } + } + + immBegin(PRIM_TRIANGLE_FAN, 5); + + for (i = 0; i < 5; i++) { + immVertex2f(pos, points[i].x, points[i].y); + } + + immEnd(); + + immBegin(PRIM_TRIANGLE_FAN, 5); + + for (i = 4; i < 8; i++) { + immVertex2f(pos, points[i].x, points[i].y); + } + + immVertex2f(pos, points[0].x, points[0].y); + immEnd(); + + immRectf(pos, points[2].x, points[2].y, points[8].x, points[8].y); + immRectf(pos, points[6].x, points[6].y, points[9].x, points[9].y); +} + +/** + * Draw join shape due to direction of joining. + */ +static void draw_join_shape(ScrArea *sa, char dir, unsigned int pos) +{ + if (dir == 'u' || dir == 'd') { + draw_vertical_join_shape(sa, dir, pos); + } + else { + draw_horizontal_join_shape(sa, dir, pos); + } +} + +/** + * Draw screen area darker with arrow (visualization of future joining). + */ +static void scrarea_draw_shape_dark(ScrArea *sa, char dir, unsigned int pos) +{ + glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); + immUniformColor4ub(0, 0, 0, 50); + + draw_join_shape(sa, dir, pos); +} + +/** + * Draw screen area ligher with arrow shape ("eraser" of previous dark shape). + */ +static void scrarea_draw_shape_light(ScrArea *sa, char UNUSED(dir), unsigned int pos) +{ + glBlendFunc(GL_DST_COLOR, GL_SRC_ALPHA); + /* value 181 was hardly computed: 181~105 */ + immUniformColor4ub(255, 255, 255, 50); + /* draw_join_shape(sa, dir); */ + + immRectf(pos, sa->v1->vec.x, sa->v1->vec.y, sa->v3->vec.x, sa->v3->vec.y); +} + +static void drawscredge_area_draw(int sizex, int sizey, short x1, short y1, short x2, short y2, unsigned int pos) +{ + int count = 0; + + if (x2 < sizex - 1) count += 2; + if (x1 > 0) count += 2; + if (y2 < sizey - 1) count += 2; + if (y1 > 0) count += 2; + + if (count == 0) { + return; + } + + immBegin(PRIM_LINES, count); + + /* right border area */ + if (x2 < sizex - 1) { + immVertex2f(pos, x2, y1); + immVertex2f(pos, x2, y2); + } + + /* left border area */ + if (x1 > 0) { /* otherwise it draws the emboss of window over */ + immVertex2f(pos, x1, y1); + immVertex2f(pos, x1, y2); + } + + /* top border area */ + if (y2 < sizey - 1) { + immVertex2f(pos, x1, y2); + immVertex2f(pos, x2, y2); + } + + /* bottom border area */ + if (y1 > 0) { + immVertex2f(pos, x1, y1); + immVertex2f(pos, x2, y1); + } + + immEnd(); +} + +/** + * \brief Screen edges drawing. + */ +static void drawscredge_area(ScrArea *sa, int sizex, int sizey, unsigned int pos) +{ + short x1 = sa->v1->vec.x; + short y1 = sa->v1->vec.y; + short x2 = sa->v3->vec.x; + short y2 = sa->v3->vec.y; + + drawscredge_area_draw(sizex, sizey, x1, y1, x2, y2, pos); +} + +/** + * Only for edge lines between areas, and the blended join arrows. + */ +void ED_screen_draw(wmWindow *win) +{ + bScreen *screen = WM_window_get_active_screen(win); + const int winsize_x = WM_window_pixels_x(win); + const int winsize_y = WM_window_pixels_y(win); + + ScrArea *sa; + ScrArea *sa1 = NULL; + ScrArea *sa2 = NULL; + ScrArea *sa3 = NULL; + + wmSubWindowSet(win, screen->mainwin); + + unsigned int pos = VertexFormat_add_attrib(immVertexFormat(), "pos", COMP_F32, 2, KEEP_FLOAT); + immBindBuiltinProgram(GPU_SHADER_2D_UNIFORM_COLOR); + + /* Note: first loop only draws if U.pixelsize > 1, skip otherwise */ + if (U.pixelsize > 1.0f) { + /* FIXME: doesn't our glLineWidth already scale by U.pixelsize? */ + glLineWidth((2.0f * U.pixelsize) - 1); + immUniformColor3ub(0x50, 0x50, 0x50); + + for (sa = screen->areabase.first; sa; sa = sa->next) { + drawscredge_area(sa, winsize_x, winsize_y, pos); + } + } + + glLineWidth(1); + immUniformColor3ub(0, 0, 0); + + for (sa = screen->areabase.first; sa; sa = sa->next) { + drawscredge_area(sa, winsize_x, winsize_y, pos); + + /* gather area split/join info */ + if (sa->flag & AREA_FLAG_DRAWJOINFROM) sa1 = sa; + if (sa->flag & AREA_FLAG_DRAWJOINTO) sa2 = sa; + if (sa->flag & (AREA_FLAG_DRAWSPLIT_H | AREA_FLAG_DRAWSPLIT_V)) sa3 = sa; + } + + /* blended join arrow */ + if (sa1 && sa2) { + int dir = area_getorientation(sa1, sa2); + int dira = -1; + if (dir != -1) { + switch (dir) { + case 0: /* W */ + dir = 'r'; + dira = 'l'; + break; + case 1: /* N */ + dir = 'd'; + dira = 'u'; + break; + case 2: /* E */ + dir = 'l'; + dira = 'r'; + break; + case 3: /* S */ + dir = 'u'; + dira = 'd'; + break; + } + } + + glEnable(GL_BLEND); + + scrarea_draw_shape_dark(sa2, dir, pos); + scrarea_draw_shape_light(sa1, dira, pos); + + glDisable(GL_BLEND); + } + + /* splitpoint */ + if (sa3) { + glEnable(GL_BLEND); + immUniformColor4ub(255, 255, 255, 100); + + immBegin(PRIM_LINES, 2); + + if (sa3->flag & AREA_FLAG_DRAWSPLIT_H) { + immVertex2f(pos, sa3->totrct.xmin, win->eventstate->y); + immVertex2f(pos, sa3->totrct.xmax, win->eventstate->y); + + immEnd(); + + immUniformColor4ub(0, 0, 0, 100); + + immBegin(PRIM_LINES, 2); + + immVertex2f(pos, sa3->totrct.xmin, win->eventstate->y + 1); + immVertex2f(pos, sa3->totrct.xmax, win->eventstate->y + 1); + } + else { + immVertex2f(pos, win->eventstate->x, sa3->totrct.ymin); + immVertex2f(pos, win->eventstate->x, sa3->totrct.ymax); + + immEnd(); + + immUniformColor4ub(0, 0, 0, 100); + + immBegin(PRIM_LINES, 2); + + immVertex2f(pos, win->eventstate->x + 1, sa3->totrct.ymin); + immVertex2f(pos, win->eventstate->x + 1, sa3->totrct.ymax); + } + + immEnd(); + + glDisable(GL_BLEND); + } + + immUnbindProgram(); + + screen->do_draw = false; +} + + +/* -------------------------------------------------------------------- */ +/* Screen Thumbnail Preview */ + +/** + * Calculates a scale factor to squash the preview for \a screen into a rectangle of given size and aspect. + */ +static void screen_preview_scale_get( + const bScreen *screen, float size_x, float size_y, + const float asp[2], + float r_scale[2]) +{ + float max_x = 0, max_y = 0; + + for (ScrArea *sa = screen->areabase.first; sa; sa = sa->next) { + max_x = MAX2(max_x, sa->totrct.xmax); + max_y = MAX2(max_y, sa->totrct.ymax); + } + r_scale[0] = (size_x * asp[0]) / max_x; + r_scale[1] = (size_y * asp[1]) / max_y; +} + +static void screen_preview_draw_areas(const bScreen *screen, const float scale[2], const float col[4], + const float ofs_between_areas) +{ + const float ofs_h = ofs_between_areas * 0.5f; + unsigned int pos = VertexFormat_add_attrib(immVertexFormat(), "pos", COMP_F32, 2, KEEP_FLOAT); + + immBindBuiltinProgram(GPU_SHADER_2D_UNIFORM_COLOR); + immUniformColor4fv(col); + + for (ScrArea *sa = screen->areabase.first; sa; sa = sa->next) { + rctf rect = { + .xmin = sa->totrct.xmin * scale[0] + ofs_h, + .xmax = sa->totrct.xmax * scale[0] - ofs_h, + .ymin = sa->totrct.ymin * scale[1] + ofs_h, + .ymax = sa->totrct.ymax * scale[1] - ofs_h + }; + + immBegin(PRIM_TRIANGLE_FAN, 4); + immVertex2f(pos, rect.xmin, rect.ymin); + immVertex2f(pos, rect.xmax, rect.ymin); + immVertex2f(pos, rect.xmax, rect.ymax); + immVertex2f(pos, rect.xmin, rect.ymax); + immEnd(); + } + + immUnbindProgram(); +} + +static void screen_preview_draw(const bScreen *screen, int size_x, int size_y) +{ + const float asp[2] = {1.0f, 0.8f}; /* square previews look a bit ugly */ + /* could use theme color (tui.wcol_menu_item.text), but then we'd need to regenerate all previews when changing */ + const float col[4] = {1.0f, 1.0f, 1.0f, 1.0f}; + float scale[2]; + + wmOrtho2(0.0f, size_x, 0.0f, size_y); + /* center */ + gpuPushMatrix(); + gpuTranslate2f(size_x * (1.0f - asp[0]) * 0.5f, size_y * (1.0f - asp[1]) * 0.5f); + + screen_preview_scale_get(screen, size_x, size_y, asp, scale); + screen_preview_draw_areas(screen, scale, col, 1.5f); + + gpuPopMatrix(); +} + +/** + * Render the preview for a screen layout in \a screen. + */ +void ED_screen_preview_render(const bScreen *screen, int size_x, int size_y, unsigned int *r_rect) +{ + char err_out[256] = "unknown"; + GPUOffScreen *offscreen = GPU_offscreen_create(size_x, size_y, 0, err_out); + + GPU_offscreen_bind(offscreen, true); + glClearColor(0.0, 0.0, 0.0, 0.0); + glClear(GL_COLOR_BUFFER_BIT); + + screen_preview_draw(screen, size_x, size_y); + + GPU_offscreen_read_pixels(offscreen, GL_UNSIGNED_BYTE, r_rect); + GPU_offscreen_unbind(offscreen, true); + + GPU_offscreen_free(offscreen); +} |