reed | 86217d8 | 2014-10-25 20:44:40 -0700 | [diff] [blame] | 1 | |
| 2 | gPath = "/skia/trunk/resources/" |
| 3 | |
| 4 | function load_file(file) |
reed | 07dada7 | 2014-10-29 20:36:05 -0700 | [diff] [blame] | 5 | local prev_path = package.path |
reed | 86217d8 | 2014-10-25 20:44:40 -0700 | [diff] [blame] | 6 | package.path = package.path .. ";" .. gPath .. file .. ".lua" |
| 7 | require(file) |
reed | 07dada7 | 2014-10-29 20:36:05 -0700 | [diff] [blame] | 8 | package.path = prev_path |
reed | d2e7dfb | 2014-10-13 19:43:17 -0700 | [diff] [blame] | 9 | end |
| 10 | |
reed | 86217d8 | 2014-10-25 20:44:40 -0700 | [diff] [blame] | 11 | load_file("slides_utils") |
reed | d2e7dfb | 2014-10-13 19:43:17 -0700 | [diff] [blame] | 12 | |
reed | de330ff | 2014-11-02 19:19:34 -0800 | [diff] [blame^] | 13 | gSlides = parse_file(io.open("/skia/trunk/resources/slides_content2.lua", "r")) |
reed | 18ea777 | 2014-10-11 11:28:07 -0700 | [diff] [blame] | 14 | |
reed | bdc49ae | 2014-10-14 09:34:52 -0700 | [diff] [blame] | 15 | function make_rect(l, t, r, b) |
| 16 | return { left = l, top = t, right = r, bottom = b } |
| 17 | end |
| 18 | |
| 19 | function make_paint(typefacename, stylebits, size, color) |
reed | 18ea777 | 2014-10-11 11:28:07 -0700 | [diff] [blame] | 20 | local paint = Sk.newPaint(); |
| 21 | paint:setAntiAlias(true) |
reed | 09a1d67 | 2014-10-11 13:13:11 -0700 | [diff] [blame] | 22 | paint:setSubpixelText(true) |
reed | bdc49ae | 2014-10-14 09:34:52 -0700 | [diff] [blame] | 23 | paint:setTypeface(Sk.newTypeface(typefacename, stylebits)) |
reed | 18ea777 | 2014-10-11 11:28:07 -0700 | [diff] [blame] | 24 | paint:setTextSize(size) |
| 25 | paint:setColor(color) |
| 26 | return paint |
| 27 | end |
| 28 | |
reed | de330ff | 2014-11-02 19:19:34 -0800 | [diff] [blame^] | 29 | function drawSlide(canvas, slide, master_template) |
| 30 | template = master_template.slide -- need to sniff the slide to know if we're title or slide |
reed | bdc49ae | 2014-10-14 09:34:52 -0700 | [diff] [blame] | 31 | |
| 32 | local x = template.margin_x |
| 33 | local y = template.margin_y |
| 34 | |
reed | de330ff | 2014-11-02 19:19:34 -0800 | [diff] [blame^] | 35 | if slide.blockstyle == "code" then |
| 36 | local paint = master_template.codePaint |
| 37 | local fm = paint:getFontMetrics() |
| 38 | local height = #slide * (fm.descent - fm.ascent) |
| 39 | y = (480 - height) / 2 |
| 40 | for i = 1, #slide do |
| 41 | local node = slide[i] |
| 42 | y = y - fm.ascent |
| 43 | canvas:drawText(node.text, x, y, paint) |
| 44 | y = y + fm.descent |
| 45 | end |
| 46 | return |
| 47 | end |
| 48 | |
reed | 9fbc3f3 | 2014-10-21 07:12:58 -0700 | [diff] [blame] | 49 | local scale = 1.25 |
reed | d2e7dfb | 2014-10-13 19:43:17 -0700 | [diff] [blame] | 50 | for i = 1, #slide do |
| 51 | local node = slide[i] |
reed | 9fbc3f3 | 2014-10-21 07:12:58 -0700 | [diff] [blame] | 52 | local paint = template[node.indent + 1].paint |
| 53 | local extra_dy = template[node.indent + 1].extra_dy |
reed | d2e7dfb | 2014-10-13 19:43:17 -0700 | [diff] [blame] | 54 | local fm = paint:getFontMetrics() |
reed | bdc49ae | 2014-10-14 09:34:52 -0700 | [diff] [blame] | 55 | local x_offset = -fm.ascent * node.indent |
| 56 | |
reed | d2e7dfb | 2014-10-13 19:43:17 -0700 | [diff] [blame] | 57 | y = y - fm.ascent * scale |
reed | bdc49ae | 2014-10-14 09:34:52 -0700 | [diff] [blame] | 58 | canvas:drawText(node.text, x + x_offset, y, paint) |
reed | 9fbc3f3 | 2014-10-21 07:12:58 -0700 | [diff] [blame] | 59 | y = y + fm.descent * scale + extra_dy |
| 60 | end |
| 61 | end |
| 62 | |
reed | 18ea777 | 2014-10-11 11:28:07 -0700 | [diff] [blame] | 63 | -------------------------------------------------------------------------------------- |
reed | 9fbc3f3 | 2014-10-21 07:12:58 -0700 | [diff] [blame] | 64 | function make_tmpl(paint, extra_dy) |
| 65 | return { paint = paint, extra_dy = extra_dy } |
| 66 | end |
reed | 18ea777 | 2014-10-11 11:28:07 -0700 | [diff] [blame] | 67 | |
reed | bdc49ae | 2014-10-14 09:34:52 -0700 | [diff] [blame] | 68 | function SkiaPoint_make_template() |
| 69 | local title = { |
| 70 | margin_x = 30, |
| 71 | margin_y = 100, |
| 72 | } |
reed | 9fbc3f3 | 2014-10-21 07:12:58 -0700 | [diff] [blame] | 73 | title[1] = make_paint("Arial", 1, 50, { a=1, r=1, g=1, b=1 }) |
reed | bdc49ae | 2014-10-14 09:34:52 -0700 | [diff] [blame] | 74 | title[1]:setTextAlign("center") |
reed | 9fbc3f3 | 2014-10-21 07:12:58 -0700 | [diff] [blame] | 75 | title[2] = make_paint("Arial", 1, 25, { a=1, r=.75, g=.75, b=.75 }) |
reed | bdc49ae | 2014-10-14 09:34:52 -0700 | [diff] [blame] | 76 | title[2]:setTextAlign("center") |
reed | 18ea777 | 2014-10-11 11:28:07 -0700 | [diff] [blame] | 77 | |
reed | bdc49ae | 2014-10-14 09:34:52 -0700 | [diff] [blame] | 78 | local slide = { |
| 79 | margin_x = 20, |
reed | 9fbc3f3 | 2014-10-21 07:12:58 -0700 | [diff] [blame] | 80 | margin_y = 25, |
reed | bdc49ae | 2014-10-14 09:34:52 -0700 | [diff] [blame] | 81 | } |
reed | 9fbc3f3 | 2014-10-21 07:12:58 -0700 | [diff] [blame] | 82 | slide[1] = make_tmpl(make_paint("Arial", 1, 36, { a=1, r=1, g=1, b=1 }), 18) |
| 83 | slide[2] = make_tmpl(make_paint("Arial", 0, 30, { a=1, r=1, g=1, b=1 }), 0) |
| 84 | slide[3] = make_tmpl(make_paint("Arial", 0, 24, { a=1, r=.8, g=.8, b=.8 }), 0) |
reed | bdc49ae | 2014-10-14 09:34:52 -0700 | [diff] [blame] | 85 | |
| 86 | return { |
| 87 | title = title, |
| 88 | slide = slide, |
reed | de330ff | 2014-11-02 19:19:34 -0800 | [diff] [blame^] | 89 | codePaint = make_paint("Courier", 0, 24, { a=1, r=.9, g=.9, b=.9 }), |
reed | bdc49ae | 2014-10-14 09:34:52 -0700 | [diff] [blame] | 90 | } |
| 91 | end |
| 92 | |
| 93 | gTemplate = SkiaPoint_make_template() |
reed | 18ea777 | 2014-10-11 11:28:07 -0700 | [diff] [blame] | 94 | |
| 95 | gRedPaint = Sk.newPaint() |
| 96 | gRedPaint:setAntiAlias(true) |
| 97 | gRedPaint:setColor{a=1, r=1, g=0, b=0 } |
| 98 | |
reed | 09a1d67 | 2014-10-11 13:13:11 -0700 | [diff] [blame] | 99 | -- animation.proc is passed the canvas before drawing. |
| 100 | -- The animation.proc returns itself or another animation (which means keep animating) |
| 101 | -- or it returns nil, which stops the animation. |
| 102 | -- |
| 103 | local gCurrAnimation |
| 104 | |
reed | f355df5 | 2014-10-12 12:18:40 -0700 | [diff] [blame] | 105 | gSlideIndex = 1 |
| 106 | |
reed | 96affcd | 2014-10-13 12:38:04 -0700 | [diff] [blame] | 107 | function new_drawable_picture(pic) |
| 108 | return { |
| 109 | picture = pic, |
| 110 | width = pic:width(), |
| 111 | height = pic:height(), |
| 112 | draw = function (self, canvas, x, y, paint) |
| 113 | canvas:drawPicture(self.picture, x, y, paint) |
| 114 | end |
| 115 | } |
| 116 | end |
| 117 | |
| 118 | function new_drawable_image(img) |
| 119 | return { |
| 120 | image = img, |
| 121 | width = img:width(), |
| 122 | height = img:height(), |
| 123 | draw = function (self, canvas, x, y, paint) |
| 124 | canvas:drawImage(self.image, x, y, paint) |
| 125 | end |
| 126 | } |
| 127 | end |
reed | f355df5 | 2014-10-12 12:18:40 -0700 | [diff] [blame] | 128 | |
reed | 86217d8 | 2014-10-25 20:44:40 -0700 | [diff] [blame] | 129 | function new_drawable_slide(slide) |
| 130 | return { |
| 131 | slide = slide, |
| 132 | draw = function (self, canvas, x, y, paint) |
| 133 | if (nil == paint or ("number" == type(paint) and (1 == paint))) then |
| 134 | canvas:save() |
| 135 | else |
| 136 | canvas:saveLayer(paint) |
| 137 | end |
| 138 | canvas:translate(x, y) |
| 139 | drawSlide(canvas, self.slide, gTemplate) |
| 140 | canvas:restore() |
| 141 | end |
| 142 | } |
| 143 | end |
| 144 | |
| 145 | function next_slide() |
| 146 | local prev = gSlides[gSlideIndex] |
| 147 | |
| 148 | gSlideIndex = gSlideIndex + 1 |
| 149 | if gSlideIndex > #gSlides then |
| 150 | gSlideIndex = 1 |
| 151 | end |
| 152 | |
| 153 | spawn_transition(prev, gSlides[gSlideIndex], true) |
| 154 | end |
| 155 | |
| 156 | function prev_slide() |
| 157 | local prev = gSlides[gSlideIndex] |
| 158 | |
| 159 | gSlideIndex = gSlideIndex - 1 |
| 160 | if gSlideIndex < 1 then |
| 161 | gSlideIndex = #gSlides |
| 162 | end |
| 163 | |
| 164 | spawn_transition(prev, gSlides[gSlideIndex], false) |
| 165 | end |
| 166 | |
reed | 468b181 | 2014-10-19 11:42:54 -0700 | [diff] [blame] | 167 | function convert_to_picture_drawable(slide) |
| 168 | local rec = Sk.newPictureRecorder() |
| 169 | drawSlide(rec:beginRecording(640, 480), slide, gTemplate) |
| 170 | return new_drawable_picture(rec:endRecording()) |
| 171 | end |
| 172 | |
| 173 | function convert_to_image_drawable(slide) |
| 174 | local surf = Sk.newRasterSurface(640, 480) |
| 175 | drawSlide(surf:getCanvas(), slide, gTemplate) |
| 176 | return new_drawable_image(surf:newImageSnapshot()) |
| 177 | end |
| 178 | |
reed | 86217d8 | 2014-10-25 20:44:40 -0700 | [diff] [blame] | 179 | -- gMakeDrawable = convert_to_picture_drawable |
| 180 | gMakeDrawable = new_drawable_slide |
reed | 468b181 | 2014-10-19 11:42:54 -0700 | [diff] [blame] | 181 | |
reed | 07dada7 | 2014-10-29 20:36:05 -0700 | [diff] [blame] | 182 | load_file("slides_transitions") |
| 183 | |
reed | f355df5 | 2014-10-12 12:18:40 -0700 | [diff] [blame] | 184 | function spawn_transition(prevSlide, nextSlide, is_forward) |
| 185 | local transition |
| 186 | if is_forward then |
reed | 07dada7 | 2014-10-29 20:36:05 -0700 | [diff] [blame] | 187 | transition = gTransitionTable[nextSlide.transition] |
reed | f355df5 | 2014-10-12 12:18:40 -0700 | [diff] [blame] | 188 | else |
reed | 07dada7 | 2014-10-29 20:36:05 -0700 | [diff] [blame] | 189 | transition = gTransitionTable[prevSlide.transition] |
reed | f355df5 | 2014-10-12 12:18:40 -0700 | [diff] [blame] | 190 | end |
| 191 | |
| 192 | if not transition then |
reed | d2e7dfb | 2014-10-13 19:43:17 -0700 | [diff] [blame] | 193 | transition = fade_slide_transition |
reed | f355df5 | 2014-10-12 12:18:40 -0700 | [diff] [blame] | 194 | end |
| 195 | |
reed | 468b181 | 2014-10-19 11:42:54 -0700 | [diff] [blame] | 196 | local prevDrawable = gMakeDrawable(prevSlide) |
| 197 | local nextDrawable = gMakeDrawable(nextSlide) |
reed | 96affcd | 2014-10-13 12:38:04 -0700 | [diff] [blame] | 198 | gCurrAnimation = transition(prevDrawable, nextDrawable, is_forward) |
reed | f355df5 | 2014-10-12 12:18:40 -0700 | [diff] [blame] | 199 | end |
| 200 | |
| 201 | -------------------------------------------------------------------------------------- |
| 202 | |
reed | 09a1d67 | 2014-10-11 13:13:11 -0700 | [diff] [blame] | 203 | function spawn_rotate_animation() |
| 204 | gCurrAnimation = { |
| 205 | angle = 0, |
| 206 | angle_delta = 5, |
| 207 | pivot_x = 320, |
| 208 | pivot_y = 240, |
reed | f355df5 | 2014-10-12 12:18:40 -0700 | [diff] [blame] | 209 | proc = function (self, canvas, drawSlideProc) |
| 210 | if self.angle >= 360 then |
| 211 | drawSlideProc(canvas) |
reed | 09a1d67 | 2014-10-11 13:13:11 -0700 | [diff] [blame] | 212 | return nil |
| 213 | end |
reed | f355df5 | 2014-10-12 12:18:40 -0700 | [diff] [blame] | 214 | canvas:translate(self.pivot_x, self.pivot_y) |
| 215 | canvas:rotate(self.angle) |
| 216 | canvas:translate(-self.pivot_x, -self.pivot_y) |
| 217 | drawSlideProc(canvas) |
reed | 09a1d67 | 2014-10-11 13:13:11 -0700 | [diff] [blame] | 218 | |
reed | f355df5 | 2014-10-12 12:18:40 -0700 | [diff] [blame] | 219 | self.angle = self.angle + self.angle_delta |
| 220 | return self |
reed | 09a1d67 | 2014-10-11 13:13:11 -0700 | [diff] [blame] | 221 | end |
| 222 | } |
| 223 | end |
| 224 | |
| 225 | function spawn_scale_animation() |
| 226 | gCurrAnimation = { |
| 227 | scale = 1, |
| 228 | scale_delta = .95, |
| 229 | scale_limit = 0.2, |
| 230 | pivot_x = 320, |
| 231 | pivot_y = 240, |
reed | f355df5 | 2014-10-12 12:18:40 -0700 | [diff] [blame] | 232 | proc = function (self, canvas, drawSlideProc) |
| 233 | if self.scale < self.scale_limit then |
| 234 | self.scale = self.scale_limit |
| 235 | self.scale_delta = 1 / self.scale_delta |
reed | 09a1d67 | 2014-10-11 13:13:11 -0700 | [diff] [blame] | 236 | end |
reed | f355df5 | 2014-10-12 12:18:40 -0700 | [diff] [blame] | 237 | if self.scale > 1 then |
| 238 | drawSlideProc(canvas) |
reed | 09a1d67 | 2014-10-11 13:13:11 -0700 | [diff] [blame] | 239 | return nil |
| 240 | end |
reed | f355df5 | 2014-10-12 12:18:40 -0700 | [diff] [blame] | 241 | canvas:translate(self.pivot_x, self.pivot_y) |
| 242 | canvas:scale(self.scale, self.scale) |
| 243 | canvas:translate(-self.pivot_x, -self.pivot_y) |
| 244 | drawSlideProc(canvas) |
reed | 09a1d67 | 2014-10-11 13:13:11 -0700 | [diff] [blame] | 245 | |
reed | f355df5 | 2014-10-12 12:18:40 -0700 | [diff] [blame] | 246 | self.scale = self.scale * self.scale_delta |
| 247 | return self |
reed | 09a1d67 | 2014-10-11 13:13:11 -0700 | [diff] [blame] | 248 | end |
| 249 | } |
| 250 | end |
| 251 | |
reed | 9fbc3f3 | 2014-10-21 07:12:58 -0700 | [diff] [blame] | 252 | local bgPaint = nil |
| 253 | |
| 254 | function draw_bg(canvas) |
| 255 | if not bgPaint then |
| 256 | bgPaint = Sk.newPaint() |
| 257 | local grad = Sk.newLinearGradient( 0, 0, { a=1, r=0, g=0, b=.3 }, |
| 258 | 640, 480, { a=1, r=0, g=0, b=.8 }) |
| 259 | bgPaint:setShader(grad) |
| 260 | end |
| 261 | |
| 262 | canvas:drawPaint(bgPaint) |
| 263 | end |
| 264 | |
reed | bdc49ae | 2014-10-14 09:34:52 -0700 | [diff] [blame] | 265 | function onDrawContent(canvas, width, height) |
| 266 | local matrix = Sk.newMatrix() |
| 267 | matrix:setRectToRect(make_rect(0, 0, 640, 480), make_rect(0, 0, width, height), "center") |
| 268 | canvas:concat(matrix) |
| 269 | |
reed | 9fbc3f3 | 2014-10-21 07:12:58 -0700 | [diff] [blame] | 270 | draw_bg(canvas) |
| 271 | |
reed | f355df5 | 2014-10-12 12:18:40 -0700 | [diff] [blame] | 272 | local drawSlideProc = function(canvas) |
reed | bdc49ae | 2014-10-14 09:34:52 -0700 | [diff] [blame] | 273 | drawSlide(canvas, gSlides[gSlideIndex], gTemplate) |
reed | 09a1d67 | 2014-10-11 13:13:11 -0700 | [diff] [blame] | 274 | end |
| 275 | |
reed | 09a1d67 | 2014-10-11 13:13:11 -0700 | [diff] [blame] | 276 | if gCurrAnimation then |
reed | f355df5 | 2014-10-12 12:18:40 -0700 | [diff] [blame] | 277 | gCurrAnimation = gCurrAnimation:proc(canvas, drawSlideProc) |
reed | 09a1d67 | 2014-10-11 13:13:11 -0700 | [diff] [blame] | 278 | return true |
| 279 | else |
reed | f355df5 | 2014-10-12 12:18:40 -0700 | [diff] [blame] | 280 | drawSlideProc(canvas) |
reed | 09a1d67 | 2014-10-11 13:13:11 -0700 | [diff] [blame] | 281 | return false |
| 282 | end |
| 283 | end |
| 284 | |
| 285 | function onClickHandler(x, y) |
| 286 | return false |
| 287 | end |
| 288 | |
| 289 | local keyProcs = { |
| 290 | n = next_slide, |
| 291 | p = prev_slide, |
| 292 | r = spawn_rotate_animation, |
| 293 | s = spawn_scale_animation, |
reed | c766398 | 2014-10-21 10:46:01 -0700 | [diff] [blame] | 294 | ["="] = function () scale_text_delta(gTemplate, 1) end, |
| 295 | ["-"] = function () scale_text_delta(gTemplate, -1) end, |
reed | 09a1d67 | 2014-10-11 13:13:11 -0700 | [diff] [blame] | 296 | } |
| 297 | |
| 298 | function onCharHandler(uni) |
| 299 | local proc = keyProcs[uni] |
| 300 | if proc then |
| 301 | proc() |
| 302 | return true |
| 303 | end |
| 304 | return false |
| 305 | end |