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1 /**************************************************************************
2  * Copyright 2015 VMware, Inc.
3  * All Rights Reserved.
4  *
5  * Permission is hereby granted, free of charge, to any person obtaining a
6  * copy of this software and associated documentation files (the
7  * "Software"), to deal in the Software without restriction, including
8  * without limitation the rights to use, copy, modify, merge, publish,
9  * distribute, sub license, and/or sell copies of the Software, and to
10  * permit persons to whom the Software is furnished to do so, subject to
11  * the following conditions:
12  *
13  * The above copyright notice and this permission notice (including the
14  * next paragraph) shall be included in all copies or substantial portions
15  * of the Software.
16  *
17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
20  * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
21  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
22  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
23  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
24  *
25  **************************************************************************/
26 
27 #include <windows.h>
28 
29 #define WGL_WGLEXT_PROTOTYPES
30 
31 #include <GL/gl.h>
32 #include <GL/wglext.h>
33 
34 #include "state_tracker/st_copytex.h"
35 
36 #include "pipe/p_defines.h"
37 #include "pipe/p_screen.h"
38 #include "pipe/p_state.h"
39 
40 #include "stw_icd.h"
41 #include "stw_context.h"
42 #include "stw_device.h"
43 #include "stw_pixelformat.h"
44 #include "stw_framebuffer.h"
45 #include "stw_st.h"
46 
47 
48 /** Translate a WGL buffer name to a GLenum */
49 static GLenum
translate_ibuffer(int iBuffer)50 translate_ibuffer(int iBuffer)
51 {
52    switch (iBuffer) {
53    case WGL_FRONT_LEFT_ARB:
54       return GL_FRONT_LEFT;
55    case WGL_BACK_LEFT_ARB:
56       return GL_BACK_LEFT;
57    case WGL_FRONT_RIGHT_ARB:
58       return GL_FRONT_RIGHT;
59    case WGL_BACK_RIGHT_ARB:
60       return GL_BACK_RIGHT;
61    case WGL_AUX0_ARB:
62       return GL_AUX0;
63    default:
64       return GL_NONE;
65    }
66 }
67 
68 
69 /** Translate a WGL texture target type to a GLenum */
70 static GLenum
translate_target(unsigned textureTarget)71 translate_target(unsigned textureTarget)
72 {
73    switch (textureTarget) {
74    case WGL_TEXTURE_1D_ARB:
75       return GL_TEXTURE_1D;
76    case WGL_TEXTURE_2D_ARB:
77       return GL_TEXTURE_2D;
78    case WGL_TEXTURE_CUBE_MAP_ARB:
79       return GL_TEXTURE_CUBE_MAP;
80    case WGL_NO_TEXTURE_ARB:
81    default:
82       return GL_NONE;
83    }
84 }
85 
86 
87 /** Translate a WGL texture format to a GLenum */
88 static GLenum
translate_texture_format(unsigned wgl_format)89 translate_texture_format(unsigned wgl_format)
90 {
91    switch (wgl_format) {
92    case WGL_TEXTURE_RGB_ARB:
93       return GL_RGB;
94    case WGL_TEXTURE_RGBA_ARB:
95       return GL_RGBA;
96    case WGL_NO_TEXTURE_ARB:
97    default:
98       return GL_NONE;
99    }
100 }
101 
102 
103 BOOL WINAPI
wglBindTexImageARB(HPBUFFERARB hPbuffer,int iBuffer)104 wglBindTexImageARB(HPBUFFERARB hPbuffer, int iBuffer)
105 {
106    HDC prevDrawable = stw_get_current_dc();
107    HDC prevReadable = stw_get_current_read_dc();
108    HDC dc;
109    struct stw_context *curctx = stw_current_context();
110    struct stw_framebuffer *fb;
111    GLenum texFormat, srcBuffer, target;
112    boolean retVal;
113    int pixelFormatSave;
114 
115    /*
116     * Implementation notes:
117     * Ideally, we'd implement this function with the
118     * st_context_iface::teximage() function which replaces a specific
119     * texture image with a different resource (the pbuffer).
120     * The main problem however, is the pbuffer image is upside down relative
121     * to the texture image.
122     * Window system drawing surfaces (windows & pbuffers) are "top to bottom"
123     * while OpenGL texture images are "bottom to top".  One possible solution
124     * to this is to invert rendering to pbuffers (as we do for renderbuffers)
125     * but that could lead to other issues (and would require extensive
126     * testing).
127     *
128     * The simple alternative is to use a copy-based approach which copies the
129     * pbuffer image into the texture via glCopyTex[Sub]Image.  That's what
130     * we do here.
131     */
132 
133    if (!curctx) {
134       debug_printf("No rendering context in wglBindTexImageARB()\n");
135       SetLastError(ERROR_INVALID_OPERATION);
136       return FALSE;
137    }
138 
139    fb = stw_framebuffer_from_HPBUFFERARB(hPbuffer);
140    if (!fb) {
141       debug_printf("Invalid pbuffer handle in wglBindTexImageARB()\n");
142       SetLastError(ERROR_INVALID_HANDLE);
143       return FALSE;
144    }
145 
146    srcBuffer = translate_ibuffer(iBuffer);
147    if (srcBuffer == GL_NONE) {
148       debug_printf("Invalid buffer 0x%x in wglBindTexImageARB()\n", iBuffer);
149       SetLastError(ERROR_INVALID_DATA);
150       return FALSE;
151    }
152 
153    target = translate_target(fb->textureTarget);
154    if (target == GL_NONE) {
155       debug_printf("no texture target in wglBindTexImageARB()\n");
156       return FALSE;
157    }
158 
159    texFormat = translate_texture_format(fb->textureFormat);
160    if (texFormat == GL_NONE) {
161       debug_printf("no texture format in wglBindTexImageARB()\n");
162       return FALSE;
163    }
164 
165    /*
166     * Bind the pbuffer surface so we can read/copy from it.
167     *
168     * Before we can call stw_make_current() we have to temporarily
169     * change the pbuffer's pixel format to match the context to avoid
170     * an error condition.  After the stw_make_current() we restore the
171     * buffer's pixel format.
172     */
173    pixelFormatSave = fb->iPixelFormat;
174    fb->iPixelFormat = curctx->iPixelFormat;
175    dc = wglGetPbufferDCARB(hPbuffer);
176    retVal = stw_make_current(dc, dc, curctx->dhglrc);
177    fb->iPixelFormat = pixelFormatSave;
178    if (!retVal) {
179       debug_printf("stw_make_current(#1) failed in wglBindTexImageARB()\n");
180       wglReleasePbufferDCARB(hPbuffer, dc);
181       return FALSE;
182    }
183 
184    st_copy_framebuffer_to_texture(srcBuffer, fb->width, fb->height,
185                                   target, fb->textureLevel,
186                                   fb->textureFace, texFormat);
187 
188    /* rebind previous drawing surface */
189    retVal = stw_make_current(prevDrawable, prevReadable, curctx->dhglrc);
190    if (!retVal) {
191       debug_printf("stw_make_current(#2) failed in wglBindTexImageARB()\n");
192    }
193 
194    wglReleasePbufferDCARB(hPbuffer, dc);
195 
196    return retVal;
197 }
198 
199 
200 BOOL WINAPI
wglReleaseTexImageARB(HPBUFFERARB hPbuffer,int iBuffer)201 wglReleaseTexImageARB(HPBUFFERARB hPbuffer, int iBuffer)
202 {
203    struct stw_framebuffer *fb = stw_framebuffer_from_HPBUFFERARB(hPbuffer);
204    GLenum srcBuffer;
205 
206    /* nothing to do here, but we do error checking anyway */
207 
208    if (!fb) {
209       debug_printf("Invalid pbuffer handle in wglReleaseTexImageARB()\n");
210       SetLastError(ERROR_INVALID_HANDLE);
211       return FALSE;
212    }
213 
214    srcBuffer = translate_ibuffer(iBuffer);
215    if (srcBuffer == GL_NONE) {
216       debug_printf("Invalid buffer 0x%x in wglReleaseTexImageARB()\n", iBuffer);
217       SetLastError(ERROR_INVALID_DATA);
218       return FALSE;
219    }
220 
221    return TRUE;
222 }
223 
224 
225 BOOL WINAPI
wglSetPbufferAttribARB(HPBUFFERARB hPbuffer,const int * piAttribList)226 wglSetPbufferAttribARB(HPBUFFERARB hPbuffer, const int *piAttribList)
227 {
228    struct stw_framebuffer *fb = stw_framebuffer_from_HPBUFFERARB(hPbuffer);
229    int face, i;
230 
231    if (!fb) {
232       SetLastError(ERROR_INVALID_HANDLE);
233       return FALSE;
234    }
235 
236    for (i = 0; piAttribList[i]; i += 2) {
237       switch (piAttribList[i]) {
238       case WGL_MIPMAP_LEVEL_ARB:
239          fb->textureLevel = piAttribList[i+1];
240          break;
241       case WGL_CUBE_MAP_FACE_ARB:
242          face = piAttribList[i+1];
243          if (face >= WGL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB &&
244              face <= WGL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB) {
245             fb->textureFace = face - WGL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB;
246          }
247          else {
248             debug_printf("Invalid cube face 0x%x in "
249                          "wglSetPbufferAttribARB()\n",
250                          piAttribList[i]);
251             SetLastError(ERROR_INVALID_DATA);
252             return FALSE;
253          }
254          break;
255       default:
256          debug_printf("Invalid attribute 0x%x in wglSetPbufferAttribARB()\n",
257                       piAttribList[i]);
258          SetLastError(ERROR_INVALID_DATA);
259          return FALSE;
260       }
261    }
262 
263    return TRUE;
264 }
265