st_context.h revision 2b151bbb957284e7a1a272c1b5ec6c9307e6e623 
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
35struct bitmap_cache;
36struct blit_state;
37struct dd_function_table;
38struct draw_context;
39struct draw_stage;
40struct gen_mipmap_state;
41struct st_context;
42struct st_fragment_program;
43struct u_upload_mgr;
44
45
46#define ST_NEW_MESA                    0x1 /* Mesa state has changed */
47#define ST_NEW_FRAGMENT_PROGRAM        0x2
48#define ST_NEW_VERTEX_PROGRAM          0x4
49#define ST_NEW_FRAMEBUFFER             0x8
50#define ST_NEW_EDGEFLAGS_DATA          0x10
51#define ST_NEW_GEOMETRY_PROGRAM        0x20
52
53
54struct st_state_flags {
55   GLuint mesa;
56   GLuint st;
57};
58
59struct st_tracked_state {
60   const char *name;
61   struct st_state_flags dirty;
62   void (*update)( struct st_context *st );
63};
64
65
66
67struct st_context
68{
69   struct st_context_iface iface;
70
71   struct gl_context *ctx;
72
73   struct pipe_context *pipe;
74
75   struct u_upload_mgr *uploader;
76   struct draw_context *draw;  /**< For selection/feedback/rastpos only */
77   struct draw_stage *feedback_stage;  /**< For GL_FEEDBACK rendermode */
78   struct draw_stage *selection_stage;  /**< For GL_SELECT rendermode */
79   struct draw_stage *rastpos_stage;  /**< For glRasterPos */
80   GLboolean sw_primitive_restart;
81   GLboolean clamp_frag_color_in_shader;
82   GLboolean clamp_vert_color_in_shader;
83
84
85   /* On old libGL's for linux we need to invalidate the drawables
86    * on glViewpport calls, this is set via a option.
87    */
88   boolean invalidate_on_gl_viewport;
89
90   /* Some state is contained in constant objects.
91    * Other state is just parameter values.
92    */
93   struct {
94      struct pipe_blend_state               blend;
95      struct pipe_depth_stencil_alpha_state depth_stencil;
96      struct pipe_rasterizer_state          rasterizer;
97      struct pipe_sampler_state             samplers[PIPE_MAX_SAMPLERS];
98      struct pipe_sampler_state             vertex_samplers[PIPE_MAX_VERTEX_SAMPLERS];
99      struct pipe_clip_state clip;
100      struct {
101         void *ptr;
102         unsigned size;
103      } constants[PIPE_SHADER_TYPES];
104      struct pipe_framebuffer_state framebuffer;
105      struct pipe_sampler_view *sampler_views[PIPE_MAX_SAMPLERS];
106      struct pipe_sampler_view *sampler_vertex_views[PIPE_MAX_VERTEX_SAMPLERS];
107      struct pipe_scissor_state scissor;
108      struct pipe_viewport_state viewport;
109      unsigned sample_mask;
110
111      GLuint num_samplers;
112      GLuint num_vertex_samplers;
113      GLuint num_textures;
114      GLuint num_vertex_textures;
115
116      GLuint poly_stipple[32];  /**< In OpenGL's bottom-to-top order */
117   } state;
118
119   char vendor[100];
120   char renderer[100];
121
122   struct st_state_flags dirty;
123
124   GLboolean missing_textures;
125   GLboolean vertdata_edgeflags;
126
127   /** Mapping from VERT_RESULT_x to post-transformed vertex slot */
128   const GLuint *vertex_result_to_slot;
129
130   struct st_vertex_program *vp;    /**< Currently bound vertex program */
131   struct st_fragment_program *fp;  /**< Currently bound fragment program */
132   struct st_geometry_program *gp;  /**< Currently bound geometry program */
133
134   struct st_vp_variant *vp_variant;
135   struct st_fp_variant *fp_variant;
136   struct st_gp_variant *gp_variant;
137
138   struct gl_texture_object *default_texture;
139
140   struct {
141      struct gl_program_cache *cache;
142      struct st_fragment_program *program;  /**< cur pixel transfer prog */
143      GLuint xfer_prog_sn;  /**< pixel xfer program serial no. */
144      GLuint user_prog_sn;  /**< user fragment program serial no. */
145      struct st_fragment_program *combined_prog;
146      GLuint combined_prog_sn;
147      struct pipe_resource *pixelmap_texture;
148      struct pipe_sampler_view *pixelmap_sampler_view;
149      boolean pixelmap_enabled;  /**< use the pixelmap texture? */
150   } pixel_xfer;
151
152   /** for glBitmap */
153   struct {
154      struct pipe_rasterizer_state rasterizer;
155      struct pipe_sampler_state samplers[2];
156      enum pipe_format tex_format;
157      void *vs;
158      struct bitmap_cache *cache;
159   } bitmap;
160
161   /** for glDraw/CopyPixels */
162   struct {
163      struct gl_fragment_program *shaders[4];
164      void *vert_shaders[2];   /**< ureg shaders */
165   } drawpix;
166
167   /** for glClear */
168   struct {
169      struct pipe_rasterizer_state raster;
170      struct pipe_viewport_state viewport;
171      void *vs;
172      void *fs;
173      float vertices[4][2][4];  /**< vertex pos + color */
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   /* User vertex buffers. */
192   struct {
193      struct pipe_resource *buffer;
194
195      /** Element size */
196      GLuint element_size;
197
198      /** Attribute stride */
199      GLsizei stride;
200   } user_attrib[PIPE_MAX_ATTRIBS];
201   unsigned num_user_attribs;
202
203   /* Active render condition. */
204   struct pipe_query *render_condition;
205   unsigned condition_mode;
206
207   int32_t draw_stamp;
208   int32_t read_stamp;
209};
210
211
212/* Need this so that we can implement Mesa callbacks in this module.
213 */
214static INLINE struct st_context *st_context(struct gl_context *ctx)
215{
216   return ctx->st;
217}
218
219
220/**
221 * Wrapper for struct gl_framebuffer.
222 * This is an opaque type to the outside world.
223 */
224struct st_framebuffer
225{
226   struct gl_framebuffer Base;
227   void *Private;
228
229   struct st_framebuffer_iface *iface;
230   enum st_attachment_type statts[ST_ATTACHMENT_COUNT];
231   unsigned num_statts;
232   int32_t stamp;
233   int32_t iface_stamp;
234};
235
236
237extern void st_init_driver_functions(struct dd_function_table *functions);
238
239void st_invalidate_state(struct gl_context * ctx, GLuint new_state);
240
241
242
243#define Y_0_TOP 1
244#define Y_0_BOTTOM 2
245
246static INLINE GLuint
247st_fb_orientation(const struct gl_framebuffer *fb)
248{
249   if (fb && fb->Name == 0) {
250      /* Drawing into a window (on-screen buffer).
251       *
252       * Negate Y scale to flip image vertically.
253       * The NDC Y coords prior to viewport transformation are in the range
254       * [y=-1=bottom, y=1=top]
255       * Hardware window coords are in the range [y=0=top, y=H-1=bottom] where
256       * H is the window height.
257       * Use the viewport transformation to invert Y.
258       */
259      return Y_0_TOP;
260   }
261   else {
262      /* Drawing into user-created FBO (very likely a texture).
263       *
264       * For textures, T=0=Bottom, so by extension Y=0=Bottom for rendering.
265       */
266      return Y_0_BOTTOM;
267   }
268}
269
270
271/** clear-alloc a struct-sized object, with casting */
272#define ST_CALLOC_STRUCT(T)   (struct T *) calloc(1, sizeof(struct T))
273
274
275extern int
276st_get_msaa(void);
277
278extern struct st_context *
279st_create_context(gl_api api, struct pipe_context *pipe,
280                  const struct gl_config *visual,
281                  struct st_context *share);
282
283extern void
284st_destroy_context(struct st_context *st);
285
286
287#endif
288