st_context.h revision a6457c0692f1bc292ae4120ff5cd0bed340271b9 
1/**************************************************************************
2 *
3 * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
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 above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
16 * of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25 *
26 **************************************************************************/
27
28#ifndef ST_CONTEXT_H
29#define ST_CONTEXT_H
30
31#include "main/mtypes.h"
32#include "pipe/p_state.h"
33#include "state_tracker/st_api.h"
34#include "main/fbobject.h"
35
36struct bitmap_cache;
37struct blit_state;
38struct dd_function_table;
39struct draw_context;
40struct draw_stage;
41struct gen_mipmap_state;
42struct st_context;
43struct st_fragment_program;
44struct u_upload_mgr;
45
46
47#define ST_NEW_MESA                    (1 << 0) /* Mesa state has changed */
48#define ST_NEW_FRAGMENT_PROGRAM        (1 << 1)
49#define ST_NEW_VERTEX_PROGRAM          (1 << 2)
50#define ST_NEW_FRAMEBUFFER             (1 << 3)
51#define ST_NEW_EDGEFLAGS_DATA          (1 << 4)
52#define ST_NEW_GEOMETRY_PROGRAM        (1 << 5)
53#define ST_NEW_VERTEX_ARRAYS           (1 << 6)
54
55
56struct st_state_flags {
57   GLuint mesa;
58   GLuint st;
59};
60
61struct st_tracked_state {
62   const char *name;
63   struct st_state_flags dirty;
64   void (*update)( struct st_context *st );
65};
66
67
68
69struct st_context
70{
71   struct st_context_iface iface;
72
73   struct gl_context *ctx;
74
75   struct pipe_context *pipe;
76
77   struct u_upload_mgr *uploader, *indexbuf_uploader, *constbuf_uploader;
78
79   struct draw_context *draw;  /**< For selection/feedback/rastpos only */
80   struct draw_stage *feedback_stage;  /**< For GL_FEEDBACK rendermode */
81   struct draw_stage *selection_stage;  /**< For GL_SELECT rendermode */
82   struct draw_stage *rastpos_stage;  /**< For glRasterPos */
83   GLboolean clamp_frag_color_in_shader;
84   GLboolean clamp_vert_color_in_shader;
85   boolean has_stencil_export; /**< can do shader stencil export? */
86
87   /* On old libGL's for linux we need to invalidate the drawables
88    * on glViewpport calls, this is set via a option.
89    */
90   boolean invalidate_on_gl_viewport;
91
92   boolean vertex_array_out_of_memory;
93
94   /* Some state is contained in constant objects.
95    * Other state is just parameter values.
96    */
97   struct {
98      struct pipe_blend_state               blend;
99      struct pipe_depth_stencil_alpha_state depth_stencil;
100      struct pipe_rasterizer_state          rasterizer;
101      struct pipe_sampler_state samplers[PIPE_SHADER_TYPES][PIPE_MAX_SAMPLERS];
102      GLuint num_samplers[PIPE_SHADER_TYPES];
103      struct pipe_sampler_view *sampler_views[PIPE_SHADER_TYPES][PIPE_MAX_SAMPLERS];
104      GLuint num_sampler_views[PIPE_SHADER_TYPES];
105      struct pipe_clip_state clip;
106      struct {
107         void *ptr;
108         unsigned size;
109      } constants[PIPE_SHADER_TYPES];
110      struct pipe_framebuffer_state framebuffer;
111      struct pipe_scissor_state scissor;
112      struct pipe_viewport_state viewport;
113      unsigned sample_mask;
114
115      GLuint poly_stipple[32];  /**< In OpenGL's bottom-to-top order */
116
117      GLuint fb_orientation;
118   } state;
119
120   char vendor[100];
121   char renderer[100];
122
123   struct st_state_flags dirty;
124
125   GLboolean missing_textures;
126   GLboolean vertdata_edgeflags;
127
128   /** Mapping from VERT_RESULT_x to post-transformed vertex slot */
129   const GLuint *vertex_result_to_slot;
130
131   struct st_vertex_program *vp;    /**< Currently bound vertex program */
132   struct st_fragment_program *fp;  /**< Currently bound fragment program */
133   struct st_geometry_program *gp;  /**< Currently bound geometry program */
134
135   struct st_vp_variant *vp_variant;
136   struct st_fp_variant *fp_variant;
137   struct st_gp_variant *gp_variant;
138
139   struct gl_texture_object *default_texture;
140
141   struct {
142      struct gl_program_cache *cache;
143      struct st_fragment_program *program;  /**< cur pixel transfer prog */
144      GLuint xfer_prog_sn;  /**< pixel xfer program serial no. */
145      GLuint user_prog_sn;  /**< user fragment program serial no. */
146      struct st_fragment_program *combined_prog;
147      GLuint combined_prog_sn;
148      struct pipe_resource *pixelmap_texture;
149      struct pipe_sampler_view *pixelmap_sampler_view;
150      boolean pixelmap_enabled;  /**< use the pixelmap texture? */
151   } pixel_xfer;
152
153   /** for glBitmap */
154   struct {
155      struct pipe_rasterizer_state rasterizer;
156      struct pipe_sampler_state samplers[2];
157      enum pipe_format tex_format;
158      void *vs;
159      struct bitmap_cache *cache;
160   } bitmap;
161
162   /** for glDraw/CopyPixels */
163   struct {
164      struct gl_fragment_program *shaders[4];
165      void *vert_shaders[2];   /**< ureg shaders */
166   } drawpix;
167
168   /** for glClear */
169   struct {
170      struct pipe_rasterizer_state raster;
171      struct pipe_viewport_state viewport;
172      void *vs;
173      void *fs;
174      boolean enable_ds_separate;
175   } clear;
176
177   /** used for anything using util_draw_vertex_buffer */
178   struct pipe_vertex_element velems_util_draw[3];
179
180   void *passthrough_fs;  /**< simple pass-through frag shader */
181
182   enum pipe_texture_target internal_target;
183   struct gen_mipmap_state *gen_mipmap;
184   struct blit_state *blit;
185
186   struct cso_context *cso_context;
187
188   int force_msaa;
189   void *winsys_drawable_handle;
190
191   /* Active render condition. */
192   struct pipe_query *render_condition;
193   unsigned condition_mode;
194
195   int32_t draw_stamp;
196   int32_t read_stamp;
197
198   struct st_config_options options;
199};
200
201
202/* Need this so that we can implement Mesa callbacks in this module.
203 */
204static INLINE struct st_context *st_context(struct gl_context *ctx)
205{
206   return ctx->st;
207}
208
209
210/**
211 * Wrapper for struct gl_framebuffer.
212 * This is an opaque type to the outside world.
213 */
214struct st_framebuffer
215{
216   struct gl_framebuffer Base;
217   void *Private;
218
219   struct st_framebuffer_iface *iface;
220   enum st_attachment_type statts[ST_ATTACHMENT_COUNT];
221   unsigned num_statts;
222   int32_t stamp;
223   int32_t iface_stamp;
224};
225
226
227extern void st_init_driver_functions(struct dd_function_table *functions);
228
229void st_invalidate_state(struct gl_context * ctx, GLuint new_state);
230
231
232
233#define Y_0_TOP 1
234#define Y_0_BOTTOM 2
235
236static INLINE GLuint
237st_fb_orientation(const struct gl_framebuffer *fb)
238{
239   if (fb && _mesa_is_winsys_fbo(fb)) {
240      /* Drawing into a window (on-screen buffer).
241       *
242       * Negate Y scale to flip image vertically.
243       * The NDC Y coords prior to viewport transformation are in the range
244       * [y=-1=bottom, y=1=top]
245       * Hardware window coords are in the range [y=0=top, y=H-1=bottom] where
246       * H is the window height.
247       * Use the viewport transformation to invert Y.
248       */
249      return Y_0_TOP;
250   }
251   else {
252      /* Drawing into user-created FBO (very likely a texture).
253       *
254       * For textures, T=0=Bottom, so by extension Y=0=Bottom for rendering.
255       */
256      return Y_0_BOTTOM;
257   }
258}
259
260
261/** clear-alloc a struct-sized object, with casting */
262#define ST_CALLOC_STRUCT(T)   (struct T *) calloc(1, sizeof(struct T))
263
264
265extern int
266st_get_msaa(void);
267
268extern struct st_context *
269st_create_context(gl_api api, struct pipe_context *pipe,
270                  const struct gl_config *visual,
271                  struct st_context *share,
272                  const struct st_config_options *options);
273
274extern void
275st_destroy_context(struct st_context *st);
276
277
278#endif
279