Pierre Ossman | 403ac27 | 2017-01-02 17:00:41 +0100 | [diff] [blame] | 1 | /* Copyright 2016 Pierre Ossman for Cendio AB |
| 2 | * |
| 3 | * This is free software; you can redistribute it and/or modify |
| 4 | * it under the terms of the GNU General Public License as published by |
| 5 | * the Free Software Foundation; either version 2 of the License, or |
| 6 | * (at your option) any later version. |
| 7 | * |
| 8 | * This software is distributed in the hope that it will be useful, |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 11 | * GNU General Public License for more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU General Public License |
| 14 | * along with this software; if not, write to the Free Software |
| 15 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, |
| 16 | * USA. |
| 17 | */ |
| 18 | |
| 19 | #include <assert.h> |
| 20 | |
| 21 | #include <ApplicationServices/ApplicationServices.h> |
| 22 | |
| 23 | #include <FL/Fl_RGB_Image.H> |
| 24 | #include <FL/Fl_Window.H> |
| 25 | #include <FL/x.H> |
| 26 | |
| 27 | #include <rdr/Exception.h> |
| 28 | |
| 29 | #include "Surface.h" |
| 30 | |
Pierre Ossman | 3d74d88 | 2017-01-02 19:49:52 +0100 | [diff] [blame^] | 31 | static void render(CGContextRef gc, CGImageRef image, |
| 32 | int src_x, int src_y, int src_w, int src_h, |
| 33 | int x, int y, int w, int h) |
| 34 | { |
| 35 | CGRect rect; |
| 36 | |
| 37 | CGContextSaveGState(gc); |
| 38 | |
| 39 | // We have to use clipping to partially display an image |
| 40 | rect.origin.x = x; |
| 41 | rect.origin.y = y; |
| 42 | rect.size.width = w; |
| 43 | rect.size.height = h; |
| 44 | |
| 45 | CGContextClipToRect(gc, rect); |
| 46 | |
| 47 | rect.origin.x = x - src_x; |
| 48 | rect.origin.y = y - src_y; |
| 49 | rect.size.width = src_w; |
| 50 | rect.size.height = src_h; |
| 51 | |
| 52 | CGContextDrawImage(gc, rect, image); |
| 53 | |
| 54 | CGContextRestoreGState(gc); |
| 55 | } |
| 56 | |
Pierre Ossman | 403ac27 | 2017-01-02 17:00:41 +0100 | [diff] [blame] | 57 | void Surface::clear(unsigned char r, unsigned char g, unsigned char b, unsigned char a) |
| 58 | { |
| 59 | unsigned char* out; |
| 60 | int x, y; |
| 61 | |
| 62 | r = (unsigned)r * a / 255; |
| 63 | g = (unsigned)g * a / 255; |
| 64 | b = (unsigned)b * a / 255; |
| 65 | |
| 66 | out = data; |
| 67 | for (y = 0;y < width();y++) { |
| 68 | for (x = 0;x < height();x++) { |
| 69 | *out++ = b; |
| 70 | *out++ = g; |
| 71 | *out++ = r; |
| 72 | *out++ = a; |
| 73 | } |
| 74 | } |
| 75 | } |
| 76 | |
| 77 | void Surface::draw(int src_x, int src_y, int x, int y, int w, int h) |
| 78 | { |
Pierre Ossman | 403ac27 | 2017-01-02 17:00:41 +0100 | [diff] [blame] | 79 | CGContextSaveGState(fl_gc); |
| 80 | |
| 81 | // Reset the transformation matrix back to the default identity |
| 82 | // matrix as otherwise we get a massive performance hit |
| 83 | CGContextConcatCTM(fl_gc, CGAffineTransformInvert(CGContextGetCTM(fl_gc))); |
| 84 | |
| 85 | // macOS Coordinates are from bottom left, not top left |
| 86 | src_y = height() - (src_y + h); |
| 87 | y = Fl_Window::current()->h() - (y + h); |
| 88 | |
Pierre Ossman | 3d74d88 | 2017-01-02 19:49:52 +0100 | [diff] [blame^] | 89 | render(fl_gc, image, src_x, src_y, width(), height(), x, y, w, h); |
Pierre Ossman | 403ac27 | 2017-01-02 17:00:41 +0100 | [diff] [blame] | 90 | |
| 91 | CGContextRestoreGState(fl_gc); |
| 92 | } |
| 93 | |
Pierre Ossman | 3d74d88 | 2017-01-02 19:49:52 +0100 | [diff] [blame^] | 94 | void Surface::draw(Surface* dst, int src_x, int src_y, int x, int y, int w, int h) |
| 95 | { |
| 96 | CGColorSpaceRef lut; |
| 97 | CGContextRef bitmap; |
| 98 | |
| 99 | lut = CGDisplayCopyColorSpace(kCGDirectMainDisplay); |
| 100 | if (!lut) { |
| 101 | lut = CGColorSpaceCreateDeviceRGB(); |
| 102 | if (!lut) |
| 103 | throw rdr::Exception("CGColorSpaceCreateDeviceRGB"); |
| 104 | } |
| 105 | |
| 106 | bitmap = CGBitmapContextCreate(dst->data, dst->width(), |
| 107 | dst->height(), 8, dst->width()*4, lut, |
| 108 | kCGImageAlphaNoneSkipFirst | kCGBitmapByteOrder32Little); |
| 109 | CGColorSpaceRelease(lut); |
| 110 | if (!bitmap) |
| 111 | throw rdr::Exception("CGBitmapContextCreate"); |
| 112 | |
| 113 | // macOS Coordinates are from bottom left, not top left |
| 114 | src_y = height() - (src_y + h); |
| 115 | y = dst->height() - (y + h); |
| 116 | |
| 117 | render(bitmap, image, src_x, src_y, width(), height(), x, y, w, h); |
| 118 | |
| 119 | CGContextRelease(bitmap); |
| 120 | } |
| 121 | |
Pierre Ossman | 403ac27 | 2017-01-02 17:00:41 +0100 | [diff] [blame] | 122 | void Surface::alloc() |
| 123 | { |
| 124 | CGColorSpaceRef lut; |
| 125 | CGDataProviderRef provider; |
| 126 | |
| 127 | data = new unsigned char[width() * height() * 4]; |
| 128 | |
| 129 | lut = CGDisplayCopyColorSpace(kCGDirectMainDisplay); |
| 130 | if (!lut) { |
| 131 | lut = CGColorSpaceCreateDeviceRGB(); |
| 132 | if (!lut) |
| 133 | throw rdr::Exception("CGColorSpaceCreateDeviceRGB"); |
| 134 | } |
| 135 | |
| 136 | provider = CGDataProviderCreateWithData(NULL, data, |
| 137 | width() * height() * 4, NULL); |
| 138 | if (!provider) |
| 139 | throw rdr::Exception("CGDataProviderCreateWithData"); |
| 140 | |
| 141 | image = CGImageCreate(width(), height(), 8, 32, width() * 4, lut, |
| 142 | kCGImageAlphaNoneSkipFirst | kCGBitmapByteOrder32Little, |
| 143 | provider, NULL, false, kCGRenderingIntentDefault); |
| 144 | CGColorSpaceRelease(lut); |
| 145 | CGDataProviderRelease(provider); |
| 146 | if (!image) |
| 147 | throw rdr::Exception("CGImageCreate"); |
| 148 | } |
| 149 | |
| 150 | void Surface::dealloc() |
| 151 | { |
| 152 | CGImageRelease(image); |
| 153 | delete [] data; |
| 154 | } |
| 155 | |
| 156 | void Surface::update(const Fl_RGB_Image* image) |
| 157 | { |
| 158 | int x, y; |
| 159 | const unsigned char* in; |
| 160 | unsigned char* out; |
| 161 | |
| 162 | assert(image->w() == width()); |
| 163 | assert(image->h() == height()); |
| 164 | |
| 165 | // Convert data and pre-multiply alpha |
| 166 | in = (const unsigned char*)image->data()[0]; |
| 167 | out = data; |
| 168 | for (y = 0;y < image->h();y++) { |
| 169 | for (x = 0;x < image->w();x++) { |
| 170 | switch (image->d()) { |
| 171 | case 1: |
| 172 | *out++ = in[0]; |
| 173 | *out++ = in[0]; |
| 174 | *out++ = in[0]; |
| 175 | *out++ = 0xff; |
| 176 | break; |
| 177 | case 2: |
| 178 | *out++ = (unsigned)in[0] * in[1] / 255; |
| 179 | *out++ = (unsigned)in[0] * in[1] / 255; |
| 180 | *out++ = (unsigned)in[0] * in[1] / 255; |
| 181 | *out++ = in[1]; |
| 182 | break; |
| 183 | case 3: |
| 184 | *out++ = in[2]; |
| 185 | *out++ = in[1]; |
| 186 | *out++ = in[0]; |
| 187 | *out++ = 0xff; |
| 188 | break; |
| 189 | case 4: |
| 190 | *out++ = (unsigned)in[2] * in[3] / 255; |
| 191 | *out++ = (unsigned)in[1] * in[3] / 255; |
| 192 | *out++ = (unsigned)in[0] * in[3] / 255; |
| 193 | *out++ = in[3]; |
| 194 | break; |
| 195 | } |
| 196 | in += image->d(); |
| 197 | } |
| 198 | if (image->ld() != 0) |
| 199 | in += image->ld() - image->w() * image->d(); |
| 200 | } |
| 201 | } |