1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
|
// To use emscripten's SDL library here, you need to define
// Module.canvas and at least one of Module.ctx2D, Module.ctxGL.
mergeInto(Library, {
$SDL__deps: ['$Browser'],
$SDL: {
defaults: {
width: 320,
height: 240
},
surfaces: {},
structs: {
PixelFormat: Runtime.generateStructInfo([['void*', 'palette'], ['i8', 'BitsPerPixel'], ['i8', 'BytesPerPixel']])
},
makeSurface: function(width, height, flags) {
var surf = _malloc(14*QUANTUM_SIZE); // SDL_Surface has 14 fields of quantum size
var buffer = _malloc(width*height*4);
var pixelFormat = _malloc(18*QUANTUM_SIZE);
IHEAP[surf+QUANTUM_SIZE*0] = flags; // SDL_Surface.flags
IHEAP[surf+QUANTUM_SIZE*1] = pixelFormat; // SDL_Surface.format TODO
IHEAP[surf+QUANTUM_SIZE*2] = width; // SDL_Surface.w
IHEAP[surf+QUANTUM_SIZE*3] = height; // SDL_Surface.h
IHEAP[surf+QUANTUM_SIZE*4] = width*4; // SDL_Surface.pitch, assuming RGBA for now, since that is what ImageData gives us in browsers
IHEAP[surf+QUANTUM_SIZE*5] = buffer; // SDL_Surface.pixels
IHEAP[pixelFormat + SDL.structs.PixelFormat.palette] = 0; // TODO
IHEAP[pixelFormat + SDL.structs.PixelFormat.BitsPerPixel] = 32;
IHEAP[pixelFormat + SDL.structs.PixelFormat.BytesPerPixel] = 4;
SDL.surfaces[surf] = {
width: width,
height: height,
canvas: Module.canvas,
ctx: Module.ctx2D,
surf: surf,
buffer: buffer,
pixelFormat: pixelFormat,
alpha: 255
};
return surf;
},
freeSurface: function(surf) {
_free(SDL.surfaces[surf].buffer);
_free(SDL.surfaces[surf].pixelFormat);
_free(surf);
delete SDL.surfaces[surf];
}
},
SDL_Init__deps: ['$SDL'],
SDL_Init: function(what) {
return 0; // success
},
SDL_WasInit: function() { return 0 }, // TODO
SDL_GetVideoInfo: function() {
// %struct.SDL_VideoInfo = type { i32, i32, %struct.SDL_PixelFormat*, i32, i32 } - 5 fields of quantum size
var ret = _malloc(5*QUANTUM_SIZE);
// TODO: Use macros like in library.js
IHEAP[ret] = 0; // TODO
IHEAP[ret+QUANTUM_SIZE] = 0; // TODO
IHEAP[ret+QUANTUM_SIZE*2] = 0; // TODO
IHEAP[ret+QUANTUM_SIZE*3] = SDL.defaults.width;
IHEAP[ret+QUANTUM_SIZE*4] = SDL.defaults.height;
return ret;
},
SDL_ListModes: function(format, flags) {
return -1; // -1 == all modes are ok. TODO
},
SDL_GL_SetAttribute: function(attr, value) {
// TODO
},
SDL_SetVideoMode: function(width, height, depth, flags) {
return SDL.makeSurface(width, height, flags);
},
SDL_Quit: function() {
return 1;
},
SDL_LockSurface: function(surf) {
var surfData = SDL.surfaces[surf];
surfData.image = surfData.ctx.getImageData(0, 0, surfData.width, surfData.height);
// Copy pixel data to somewhere accessible to 'C/C++'
var num = surfData.image.data.length;
for (var i = 0; i < num; i++) {
// TODO: Use macros like in library.js
IHEAP[surfData.buffer+i] = surfData.image.data[i];
}
// Mark in C/C++-accessible SDL structure
// SDL_Surface has the following fields: Uint32 flags, SDL_PixelFormat *format; int w, h; Uint16 pitch; void *pixels; ...
// So we have fields all of the same size, and 5 of them before us.
// TODO: Use macros like in library.js
IHEAP[surf + 5*QUANTUM_SIZE] = surfData.buffer;
},
SDL_UnlockSurface: function(surf) {
var surfData = SDL.surfaces[surf];
// Copy pixel data to image
var num = surfData.image.data.length;
for (var i = 0; i < num; i++) {
// TODO: Use macros like in library.js
surfData.image.data[i] = IHEAP[surfData.buffer+i];
}
for (var i = 0; i < num/4; i++) {
surfData.image.data[i*4+3] = 255; // opacity, as canvases blend alpha
}
// Copy to canvas
surfData.ctx.putImageData(surfData.image, 0, 0);
// Cleanup
surfData.image = null;
},
SDL_Flip: function(surf) {
// We actually do this in Unlock...
},
SDL_Delay: function(delay) {
// No can do... unless you were a generator...
},
SDL_WM_SetCaption: function(title, icon) {
title = Pointer_stringify(title);
icon = Pointer_stringify(icon);
},
SDL_EnableKeyRepeat: function(delay, interval) {
// TODO
},
SDL_ShowCursor: function(toggle) {
// TODO
},
SDL_GetError: function() {
return Pointer_make(intArrayFromString("SDL is cool"), null);
},
SDL_CreateRGBSurface: function(flags, width, height, depth, rmask, gmask, bmask, amask) {
return SDL.makeSurface(width, height, flags);
},
SDL_FreeSurface: function(surf) {
SDL.freeSurface(surf);
},
SDL_UpperBlit: function(src, srcrect, dst, dstrect) {
assert(!srcrect && !dstrect); // TODO
var srcData = SDL.surfaces[src];
var dstData = SDL.surfaces[dst];
assert(srcData.width === dstData.width && srcData.height === dstData.height);
for (var i = 0; i < srcData.width*srcData.height*4; i++) {
IHEAP[dstData.buffer + i] = IHEAP[srcData.buffer + i];
}
return 0;
},
SDL_BlitSurface__deps: ['SDL_UpperBlit'],
SDL_BlitSurface: function(src, srcrect, dst, dstrect) {
return _SDL_Blit(src, srcrect, dst, dstrect);
},
SDL_SetAlpha: function(surf, flag, alpha) {
SDL.surfaces[surf].alpha = alpha;
},
// SDL_Image
IMG_Load: function(filename) {
filename = Pointer_stringify(filename);
var format = filename.split('.').slice(-1)[0];
var data = readBinary(filename);
var raw = Browser.decodeImage(data, format);
var surf = SDL.makeSurface(raw.width, raw.height, 0);
// XXX Extremely inefficient!
for (var i = 0; i < raw.width*raw.height*4; i++) {
IHEAP[SDL.surfaces[surf].buffer+i] = raw.data[i];
}
return surf;
}
});
|
