Campbell Barton
de13d0a80c
While \file doesn't need an argument, it can't have another doxy command after it.
132 lines
3.5 KiB
C
132 lines
3.5 KiB
C
/*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
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* All rights reserved.
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*/
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/** \file
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* \ingroup wm
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*
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* OpenGL utilities for setting up 2D viewport for window and regions.
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*/
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#include "BLI_math.h"
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#include "BLI_rect.h"
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#include "DNA_screen_types.h"
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#include "DNA_windowmanager_types.h"
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#include "BIF_gl.h"
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#include "GPU_matrix.h"
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#include "WM_api.h"
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void wmViewport(const rcti *winrct)
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{
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int width = BLI_rcti_size_x(winrct) + 1;
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int height = BLI_rcti_size_y(winrct) + 1;
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glViewport(winrct->xmin, winrct->ymin, width, height);
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glScissor(winrct->xmin, winrct->ymin, width, height);
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wmOrtho2_pixelspace(width, height);
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GPU_matrix_identity_set();
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}
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void wmPartialViewport(rcti *drawrct, const rcti *winrct, const rcti *partialrct)
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{
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/* Setup part of the viewport for partial redraw. */
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bool scissor_pad;
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if (partialrct->xmin == partialrct->xmax) {
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/* Full region. */
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*drawrct = *winrct;
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scissor_pad = true;
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}
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else {
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/* Partial redraw, clipped to region. */
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BLI_rcti_isect(winrct, partialrct, drawrct);
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scissor_pad = false;
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}
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int x = drawrct->xmin - winrct->xmin;
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int y = drawrct->ymin - winrct->ymin;
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int width = BLI_rcti_size_x(winrct) + 1;
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int height = BLI_rcti_size_y(winrct) + 1;
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int scissor_width = BLI_rcti_size_x(drawrct);
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int scissor_height = BLI_rcti_size_y(drawrct);
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/* Partial redraw rect uses different convention than region rect,
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* so compensate for that here. One pixel offset is noticeable with
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* viewport border render. */
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if (scissor_pad) {
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scissor_width += 1;
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scissor_height += 1;
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}
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glViewport(0, 0, width, height);
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glScissor(x, y, scissor_width, scissor_height);
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wmOrtho2_pixelspace(width, height);
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GPU_matrix_identity_set();
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}
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void wmWindowViewport(wmWindow *win)
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{
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int width = WM_window_pixels_x(win);
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int height = WM_window_pixels_y(win);
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glViewport(0, 0, width, height);
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glScissor(0, 0, width, height);
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wmOrtho2_pixelspace(width, height);
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GPU_matrix_identity_set();
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}
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void wmOrtho2(float x1, float x2, float y1, float y2)
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{
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/* prevent opengl from generating errors */
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if (x1 == x2) x2 += 1.0f;
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if (y1 == y2) y2 += 1.0f;
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GPU_matrix_ortho_set(x1, x2, y1, y2, -100, 100);
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}
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static void wmOrtho2_offset(const float x, const float y, const float ofs)
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{
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wmOrtho2(ofs, x + ofs, ofs, y + ofs);
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}
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/* Default pixel alignment for regions. */
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void wmOrtho2_region_pixelspace(const ARegion *ar)
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{
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wmOrtho2_offset(ar->winx, ar->winy, -0.01f);
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}
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void wmOrtho2_pixelspace(const float x, const float y)
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{
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wmOrtho2_offset(x, y, -GLA_PIXEL_OFS);
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}
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void wmGetProjectionMatrix(float mat[4][4], const rcti *winrct)
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{
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int width = BLI_rcti_size_x(winrct) + 1;
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int height = BLI_rcti_size_y(winrct) + 1;
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orthographic_m4(mat, -GLA_PIXEL_OFS, (float)width - GLA_PIXEL_OFS, -GLA_PIXEL_OFS, (float)height - GLA_PIXEL_OFS, -100, 100);
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}
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