vg_context.h revision ac8fdbc1c723afb19eeaba5457ba78d0bf33b8d4 
1/**************************************************************************
2 *
3 * Copyright 2009 VMware, Inc.  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#ifndef VG_CONTEXT_H
28#define VG_CONTEXT_H
29
30#include "vg_state.h"
31
32#include "pipe/p_format.h"
33#include "pipe/p_state.h"
34#include "util/u_pointer.h"
35#include "util/u_math.h"
36#include "state_tracker/st_api.h"
37
38#include "cso_cache/cso_hash.h"
39#include "cso_cache/cso_context.h"
40
41struct renderer;
42struct shaders_cache;
43struct shader;
44struct vg_shader;
45struct mapi_table;
46
47struct st_renderbuffer {
48   enum pipe_format   format;
49   struct pipe_surface *surface;
50   struct pipe_resource *texture;
51   VGint width, height;
52};
53
54struct st_framebuffer {
55   VGint width, height;
56   struct st_renderbuffer *strb;
57   struct st_renderbuffer *dsrb;
58
59   struct pipe_sampler_view *surface_mask_view;
60
61   struct pipe_sampler_view *blend_texture_view;
62
63
64   struct st_framebuffer_iface *iface;
65   enum st_attachment_type strb_att;
66
67   void *privateData;
68   int32_t stamp;
69   int32_t iface_stamp;
70};
71
72enum vg_object_type {
73   VG_OBJECT_UNKNOWN = 0,
74   VG_OBJECT_PAINT,
75   VG_OBJECT_IMAGE,
76   VG_OBJECT_MASK,
77   VG_OBJECT_FONT,
78   VG_OBJECT_PATH,
79
80   VG_OBJECT_LAST
81};
82enum dirty_state {
83   BLEND_DIRTY         = 1 << 0,
84   FRAMEBUFFER_DIRTY   = 1 << 1,
85   DEPTH_STENCIL_DIRTY = 1 << 2,
86   PAINT_DIRTY         = 1 << 3,
87
88   ALL_DIRTY           = BLEND_DIRTY |
89                         FRAMEBUFFER_DIRTY |
90                         DEPTH_STENCIL_DIRTY |
91                         PAINT_DIRTY
92};
93
94struct vg_context
95{
96   struct st_context_iface iface;
97   struct mapi_table *dispatch;
98
99   struct pipe_context *pipe;
100   enum pipe_format ds_format;
101
102   struct {
103      struct vg_state vg;
104      VGbitfield dirty;
105   } state;
106
107   VGErrorCode _error;
108
109   struct st_framebuffer *draw_buffer;
110
111   struct cso_hash *owned_objects[VG_OBJECT_LAST];
112
113   struct {
114      struct pipe_resource *cbuf;
115      struct pipe_sampler_state sampler;
116
117      struct vg_shader *union_fs;
118      struct vg_shader *intersect_fs;
119      struct vg_shader *subtract_fs;
120      struct vg_shader *set_fs;
121   } mask;
122
123   struct cso_context *cso_context;
124
125   struct renderer *renderer;
126   struct shaders_cache *sc;
127   struct shader *shader;
128
129   struct pipe_sampler_state blend_sampler;
130   struct vg_paint *default_paint;
131
132   struct blit_state *blit;
133
134   int32_t draw_stamp;
135};
136
137
138/**
139 *  Base class for VG objects like paths, images, fonts.
140 */
141struct vg_object {
142   enum vg_object_type type;
143   VGHandle handle;
144   struct vg_context *ctx;
145};
146
147
148void vg_init_object(struct vg_object *obj, struct vg_context *ctx, enum vg_object_type type);
149void vg_free_object(struct vg_object *obj);
150
151VGboolean vg_object_is_valid(VGHandle object, enum vg_object_type type);
152
153struct vg_context *vg_create_context(struct pipe_context *pipe,
154                                     const void *visual,
155                                     struct vg_context *share);
156void vg_destroy_context(struct vg_context *ctx);
157struct vg_context *vg_current_context(void);
158void vg_set_current_context(struct vg_context *ctx);
159
160VGboolean vg_context_is_object_valid(struct vg_context *ctx,
161                                     enum vg_object_type type,
162                                     VGHandle object);
163void vg_context_add_object(struct vg_context *ctx,
164                           enum vg_object_type type,
165                           void *ptr);
166void vg_context_remove_object(struct vg_context *ctx,
167                              enum vg_object_type type,
168                              void *ptr);
169
170void vg_validate_state(struct vg_context *ctx);
171
172void vg_set_error(struct vg_context *ctx,
173                  VGErrorCode code);
174
175struct pipe_sampler_view *vg_prepare_blend_surface(struct vg_context *ctx);
176struct pipe_sampler_view *vg_prepare_blend_surface_from_mask(struct vg_context *ctx);
177
178struct pipe_sampler_view *vg_get_surface_mask(struct vg_context *ctx);
179
180VGboolean vg_get_paint_matrix(struct vg_context *ctx,
181                              const struct matrix *paint_to_user,
182                              const struct matrix *user_to_surface,
183                              struct matrix *mat);
184
185static INLINE VGboolean is_aligned_to(const void *ptr, VGbyte alignment)
186{
187   void *aligned = align_pointer(ptr, alignment);
188   return (ptr == aligned) ? VG_TRUE : VG_FALSE;
189}
190
191static INLINE VGboolean is_aligned(const void *ptr)
192{
193   return is_aligned_to(ptr, 4);
194}
195
196static INLINE void vg_shift_rectx(VGfloat coords[4],
197                                 const VGfloat *bounds,
198                                 const VGfloat shift)
199{
200   coords[0] += shift;
201   coords[2] -= shift;
202   if (bounds) {
203      coords[2] = MIN2(coords[2], bounds[2]);
204      /* bound x/y + width/height */
205      if ((coords[0] + coords[2]) > (bounds[0] + bounds[2])) {
206         coords[2] = (bounds[0] + bounds[2]) - coords[0];
207      }
208   }
209}
210
211static INLINE void vg_shift_recty(VGfloat coords[4],
212                                 const VGfloat *bounds,
213                                 const VGfloat shift)
214{
215   coords[1] += shift;
216   coords[3] -= shift;
217   if (bounds) {
218      coords[3] = MIN2(coords[3], bounds[3]);
219      if ((coords[1] + coords[3]) > (bounds[1] + bounds[3])) {
220         coords[3] = (bounds[1] + bounds[3]) - coords[1];
221      }
222   }
223}
224
225static INLINE void vg_bound_rect(VGfloat coords[4],
226                                 const VGfloat bounds[4],
227                                 VGfloat shift[4])
228{
229   /* if outside the bounds */
230   if (coords[0] > (bounds[0] + bounds[2]) ||
231       coords[1] > (bounds[1] + bounds[3]) ||
232       (coords[0] + coords[2]) < bounds[0] ||
233       (coords[1] + coords[3]) < bounds[1]) {
234      coords[0] = 0.f;
235      coords[1] = 0.f;
236      coords[2] = 0.f;
237      coords[3] = 0.f;
238      shift[0] = 0.f;
239      shift[1] = 0.f;
240      return;
241   }
242
243   /* bound x */
244   if (coords[0] < bounds[0]) {
245      shift[0] = bounds[0] - coords[0];
246      coords[2] -= shift[0];
247      coords[0] = bounds[0];
248   } else
249      shift[0] = 0.f;
250
251   /* bound y */
252   if (coords[1] < bounds[1]) {
253      shift[1] = bounds[1] - coords[1];
254      coords[3] -= shift[1];
255      coords[1] = bounds[1];
256   } else
257      shift[1] = 0.f;
258
259   shift[2] = bounds[2] - coords[2];
260   shift[3] = bounds[3] - coords[3];
261   /* bound width/height */
262   coords[2] = MIN2(coords[2], bounds[2]);
263   coords[3] = MIN2(coords[3], bounds[3]);
264
265   /* bound x/y + width/height */
266   if ((coords[0] + coords[2]) > (bounds[0] + bounds[2])) {
267      coords[2] = (bounds[0] + bounds[2]) - coords[0];
268   }
269   if ((coords[1] + coords[3]) > (bounds[1] + bounds[3])) {
270      coords[3] = (bounds[1] + bounds[3]) - coords[1];
271   }
272
273   /* if outside the bounds */
274   if ((coords[0] + coords[2]) < bounds[0] ||
275       (coords[1] + coords[3]) < bounds[1]) {
276      coords[0] = 0.f;
277      coords[1] = 0.f;
278      coords[2] = 0.f;
279      coords[3] = 0.f;
280      return;
281   }
282}
283
284#endif
285