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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/u_format.h"
43 #include "util/u_math.h"
44 #include "util/u_memory.h"
45 #include "state_tracker/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 boolean
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 boolean
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