1 /**************************************************************************
2 *
3 * Copyright 2009 VMware, Inc.
4 * All Rights Reserved.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
17 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
18 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
19 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
20 * USE OR OTHER DEALINGS IN THE SOFTWARE.
21 *
22 * The above copyright notice and this permission notice (including the
23 * next paragraph) shall be included in all copies or substantial portions
24 * of the Software.
25 *
26 *
27 **************************************************************************/
28
29 /**
30 * @file
31 * GDI software rasterizer support.
32 *
33 * @author Jose Fonseca <jfonseca@vmware.com>
34 */
35
36
37 #include <windows.h>
38
39 #include "pipe/p_format.h"
40 #include "pipe/p_context.h"
41 #include "util/u_inlines.h"
42 #include "util/format/u_format.h"
43 #include "util/u_math.h"
44 #include "util/u_memory.h"
45 #include "frontend/sw_winsys.h"
46 #include "gdi_sw_winsys.h"
47
48
49 struct gdi_sw_displaytarget
50 {
51 enum pipe_format format;
52 unsigned width;
53 unsigned height;
54 unsigned stride;
55
56 unsigned size;
57
58 void *data;
59
60 BITMAPINFO bmi;
61 };
62
63
64 /** Cast wrapper */
65 static inline struct gdi_sw_displaytarget *
gdi_sw_displaytarget(struct sw_displaytarget * buf)66 gdi_sw_displaytarget( struct sw_displaytarget *buf )
67 {
68 return (struct gdi_sw_displaytarget *)buf;
69 }
70
71
72 static bool
gdi_sw_is_displaytarget_format_supported(struct sw_winsys * ws,unsigned tex_usage,enum pipe_format format)73 gdi_sw_is_displaytarget_format_supported( struct sw_winsys *ws,
74 unsigned tex_usage,
75 enum pipe_format format )
76 {
77 switch(format) {
78 case PIPE_FORMAT_B8G8R8X8_UNORM:
79 case PIPE_FORMAT_B8G8R8A8_UNORM:
80 return true;
81
82 /* TODO: Support other formats possible with BMPs, as described in
83 * http://msdn.microsoft.com/en-us/library/dd183376(VS.85).aspx */
84
85 default:
86 return false;
87 }
88 }
89
90
91 static void *
gdi_sw_displaytarget_map(struct sw_winsys * ws,struct sw_displaytarget * dt,unsigned flags)92 gdi_sw_displaytarget_map(struct sw_winsys *ws,
93 struct sw_displaytarget *dt,
94 unsigned flags )
95 {
96 struct gdi_sw_displaytarget *gdt = gdi_sw_displaytarget(dt);
97
98 return gdt->data;
99 }
100
101
102 static void
gdi_sw_displaytarget_unmap(struct sw_winsys * ws,struct sw_displaytarget * dt)103 gdi_sw_displaytarget_unmap(struct sw_winsys *ws,
104 struct sw_displaytarget *dt )
105 {
106
107 }
108
109
110 static void
gdi_sw_displaytarget_destroy(struct sw_winsys * winsys,struct sw_displaytarget * dt)111 gdi_sw_displaytarget_destroy(struct sw_winsys *winsys,
112 struct sw_displaytarget *dt)
113 {
114 struct gdi_sw_displaytarget *gdt = gdi_sw_displaytarget(dt);
115
116 align_free(gdt->data);
117 FREE(gdt);
118 }
119
120
121 static struct sw_displaytarget *
gdi_sw_displaytarget_create(struct sw_winsys * winsys,unsigned tex_usage,enum pipe_format format,unsigned width,unsigned height,unsigned alignment,const void * front_private,unsigned * stride)122 gdi_sw_displaytarget_create(struct sw_winsys *winsys,
123 unsigned tex_usage,
124 enum pipe_format format,
125 unsigned width, unsigned height,
126 unsigned alignment,
127 const void *front_private,
128 unsigned *stride)
129 {
130 struct gdi_sw_displaytarget *gdt;
131 unsigned cpp;
132 unsigned bpp;
133
134 gdt = CALLOC_STRUCT(gdi_sw_displaytarget);
135 if(!gdt)
136 goto no_gdt;
137
138 gdt->format = format;
139 gdt->width = width;
140 gdt->height = height;
141
142 bpp = util_format_get_blocksizebits(format);
143 cpp = util_format_get_blocksize(format);
144
145 gdt->stride = align(width * cpp, alignment);
146 gdt->size = gdt->stride * height;
147
148 gdt->data = align_malloc(gdt->size, alignment);
149 if(!gdt->data)
150 goto no_data;
151
152 gdt->bmi.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
153 gdt->bmi.bmiHeader.biWidth = gdt->stride / cpp;
154 gdt->bmi.bmiHeader.biHeight= -(long)height;
155 gdt->bmi.bmiHeader.biPlanes = 1;
156 gdt->bmi.bmiHeader.biBitCount = bpp;
157 gdt->bmi.bmiHeader.biCompression = BI_RGB;
158 gdt->bmi.bmiHeader.biSizeImage = 0;
159 gdt->bmi.bmiHeader.biXPelsPerMeter = 0;
160 gdt->bmi.bmiHeader.biYPelsPerMeter = 0;
161 gdt->bmi.bmiHeader.biClrUsed = 0;
162 gdt->bmi.bmiHeader.biClrImportant = 0;
163
164 *stride = gdt->stride;
165 return (struct sw_displaytarget *)gdt;
166
167 no_data:
168 FREE(gdt);
169 no_gdt:
170 return NULL;
171 }
172
173
174 static struct sw_displaytarget *
gdi_sw_displaytarget_from_handle(struct sw_winsys * winsys,const struct pipe_resource * templet,struct winsys_handle * whandle,unsigned * stride)175 gdi_sw_displaytarget_from_handle(struct sw_winsys *winsys,
176 const struct pipe_resource *templet,
177 struct winsys_handle *whandle,
178 unsigned *stride)
179 {
180 assert(0);
181 return NULL;
182 }
183
184
185 static bool
gdi_sw_displaytarget_get_handle(struct sw_winsys * winsys,struct sw_displaytarget * dt,struct winsys_handle * whandle)186 gdi_sw_displaytarget_get_handle(struct sw_winsys *winsys,
187 struct sw_displaytarget *dt,
188 struct winsys_handle *whandle)
189 {
190 assert(0);
191 return false;
192 }
193
194
195 void
gdi_sw_display(struct sw_winsys * winsys,struct sw_displaytarget * dt,HDC hDC)196 gdi_sw_display( struct sw_winsys *winsys,
197 struct sw_displaytarget *dt,
198 HDC hDC )
199 {
200 struct gdi_sw_displaytarget *gdt = gdi_sw_displaytarget(dt);
201
202 StretchDIBits(hDC,
203 0, 0, gdt->width, gdt->height,
204 0, 0, gdt->width, gdt->height,
205 gdt->data, &gdt->bmi, 0, SRCCOPY);
206 }
207
208 static void
gdi_sw_displaytarget_display(struct sw_winsys * winsys,struct sw_displaytarget * dt,void * context_private,struct pipe_box * box)209 gdi_sw_displaytarget_display(struct sw_winsys *winsys,
210 struct sw_displaytarget *dt,
211 void *context_private,
212 struct pipe_box *box)
213 {
214 /* nasty:
215 */
216 HDC hDC = (HDC)context_private;
217
218 gdi_sw_display(winsys, dt, hDC);
219 }
220
221
222 static void
gdi_sw_destroy(struct sw_winsys * winsys)223 gdi_sw_destroy(struct sw_winsys *winsys)
224 {
225 FREE(winsys);
226 }
227
228 struct sw_winsys *
gdi_create_sw_winsys(void)229 gdi_create_sw_winsys(void)
230 {
231 static struct sw_winsys *winsys;
232
233 winsys = CALLOC_STRUCT(sw_winsys);
234 if(!winsys)
235 return NULL;
236
237 winsys->destroy = gdi_sw_destroy;
238 winsys->is_displaytarget_format_supported = gdi_sw_is_displaytarget_format_supported;
239 winsys->displaytarget_create = gdi_sw_displaytarget_create;
240 winsys->displaytarget_from_handle = gdi_sw_displaytarget_from_handle;
241 winsys->displaytarget_get_handle = gdi_sw_displaytarget_get_handle;
242 winsys->displaytarget_map = gdi_sw_displaytarget_map;
243 winsys->displaytarget_unmap = gdi_sw_displaytarget_unmap;
244 winsys->displaytarget_display = gdi_sw_displaytarget_display;
245 winsys->displaytarget_destroy = gdi_sw_displaytarget_destroy;
246
247 return winsys;
248 }
249
250