b9a98cd051d4b7aa9d5eaaa073b0d36ad6ed42f4
[mesa.git] / src / mesa / state_tracker / st_context.h
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
36 struct bitmap_cache;
37 struct dd_function_table;
38 struct draw_context;
39 struct draw_stage;
40 struct gen_mipmap_state;
41 struct st_context;
42 struct st_fragment_program;
43 struct u_upload_mgr;
44
45
46 #define ST_NEW_MESA (1 << 0) /* Mesa state has changed */
47 #define ST_NEW_FRAGMENT_PROGRAM (1 << 1)
48 #define ST_NEW_VERTEX_PROGRAM (1 << 2)
49 #define ST_NEW_FRAMEBUFFER (1 << 3)
50 #define ST_NEW_EDGEFLAGS_DATA (1 << 4)
51 #define ST_NEW_GEOMETRY_PROGRAM (1 << 5)
52 #define ST_NEW_VERTEX_ARRAYS (1 << 6)
53
54
55 struct st_state_flags {
56 GLuint mesa;
57 GLuint st;
58 };
59
60 struct st_tracked_state {
61 const char *name;
62 struct st_state_flags dirty;
63 void (*update)( struct st_context *st );
64 };
65
66
67
68 struct st_context
69 {
70 struct st_context_iface iface;
71
72 struct gl_context *ctx;
73
74 struct pipe_context *pipe;
75
76 struct u_upload_mgr *uploader, *indexbuf_uploader, *constbuf_uploader;
77
78 struct draw_context *draw; /**< For selection/feedback/rastpos only */
79 struct draw_stage *feedback_stage; /**< For GL_FEEDBACK rendermode */
80 struct draw_stage *selection_stage; /**< For GL_SELECT rendermode */
81 struct draw_stage *rastpos_stage; /**< For glRasterPos */
82 GLboolean clamp_frag_color_in_shader;
83 GLboolean clamp_vert_color_in_shader;
84 boolean has_stencil_export; /**< can do shader stencil export? */
85 boolean has_time_elapsed;
86 boolean has_shader_model3;
87
88 /* On old libGL's for linux we need to invalidate the drawables
89 * on glViewpport calls, this is set via a option.
90 */
91 boolean invalidate_on_gl_viewport;
92
93 boolean vertex_array_out_of_memory;
94
95 /* Some state is contained in constant objects.
96 * Other state is just parameter values.
97 */
98 struct {
99 struct pipe_blend_state blend;
100 struct pipe_depth_stencil_alpha_state depth_stencil;
101 struct pipe_rasterizer_state rasterizer;
102 struct pipe_sampler_state samplers[PIPE_SHADER_TYPES][PIPE_MAX_SAMPLERS];
103 GLuint num_samplers[PIPE_SHADER_TYPES];
104 struct pipe_sampler_view *sampler_views[PIPE_SHADER_TYPES][PIPE_MAX_SAMPLERS];
105 GLuint num_sampler_views[PIPE_SHADER_TYPES];
106 struct pipe_clip_state clip;
107 struct {
108 void *ptr;
109 unsigned size;
110 } constants[PIPE_SHADER_TYPES];
111 struct pipe_framebuffer_state framebuffer;
112 struct pipe_scissor_state scissor;
113 struct pipe_viewport_state viewport;
114 unsigned sample_mask;
115
116 GLuint poly_stipple[32]; /**< In OpenGL's bottom-to-top order */
117
118 GLuint fb_orientation;
119 } state;
120
121 char vendor[100];
122 char renderer[100];
123
124 struct st_state_flags dirty;
125
126 GLboolean missing_textures;
127 GLboolean vertdata_edgeflags;
128
129 /** Mapping from VARYING_SLOT_x to post-transformed vertex slot */
130 const GLuint *vertex_result_to_slot;
131
132 struct st_vertex_program *vp; /**< Currently bound vertex program */
133 struct st_fragment_program *fp; /**< Currently bound fragment program */
134 struct st_geometry_program *gp; /**< Currently bound geometry program */
135
136 struct st_vp_variant *vp_variant;
137 struct st_fp_variant *fp_variant;
138 struct st_gp_variant *gp_variant;
139
140 struct gl_texture_object *default_texture;
141
142 struct {
143 struct gl_program_cache *cache;
144 struct st_fragment_program *program; /**< cur pixel transfer prog */
145 GLuint xfer_prog_sn; /**< pixel xfer program serial no. */
146 GLuint user_prog_sn; /**< user fragment program serial no. */
147 struct st_fragment_program *combined_prog;
148 GLuint combined_prog_sn;
149 struct pipe_resource *pixelmap_texture;
150 struct pipe_sampler_view *pixelmap_sampler_view;
151 boolean pixelmap_enabled; /**< use the pixelmap texture? */
152 } pixel_xfer;
153
154 /** for glBitmap */
155 struct {
156 struct pipe_rasterizer_state rasterizer;
157 struct pipe_sampler_state samplers[2];
158 enum pipe_format tex_format;
159 void *vs;
160 struct bitmap_cache *cache;
161 } bitmap;
162
163 /** for glDraw/CopyPixels */
164 struct {
165 struct gl_fragment_program *shaders[4];
166 void *vert_shaders[2]; /**< ureg shaders */
167 } drawpix;
168
169 /** for glClear */
170 struct {
171 struct pipe_rasterizer_state raster;
172 struct pipe_viewport_state viewport;
173 void *vs;
174 void *fs;
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
185 struct cso_context *cso_context;
186
187 void *winsys_drawable_handle;
188
189 /* The number of vertex buffers from the last call of validate_arrays. */
190 unsigned last_num_vbuffers;
191
192 int32_t draw_stamp;
193 int32_t read_stamp;
194
195 struct st_config_options options;
196 };
197
198
199 /* Need this so that we can implement Mesa callbacks in this module.
200 */
201 static INLINE struct st_context *st_context(struct gl_context *ctx)
202 {
203 return ctx->st;
204 }
205
206
207 /**
208 * Wrapper for struct gl_framebuffer.
209 * This is an opaque type to the outside world.
210 */
211 struct st_framebuffer
212 {
213 struct gl_framebuffer Base;
214 void *Private;
215
216 struct st_framebuffer_iface *iface;
217 enum st_attachment_type statts[ST_ATTACHMENT_COUNT];
218 unsigned num_statts;
219 int32_t stamp;
220 int32_t iface_stamp;
221 };
222
223
224 extern void st_init_driver_functions(struct dd_function_table *functions);
225
226 void st_invalidate_state(struct gl_context * ctx, GLuint new_state);
227
228
229
230 #define Y_0_TOP 1
231 #define Y_0_BOTTOM 2
232
233 static INLINE GLuint
234 st_fb_orientation(const struct gl_framebuffer *fb)
235 {
236 if (fb && _mesa_is_winsys_fbo(fb)) {
237 /* Drawing into a window (on-screen buffer).
238 *
239 * Negate Y scale to flip image vertically.
240 * The NDC Y coords prior to viewport transformation are in the range
241 * [y=-1=bottom, y=1=top]
242 * Hardware window coords are in the range [y=0=top, y=H-1=bottom] where
243 * H is the window height.
244 * Use the viewport transformation to invert Y.
245 */
246 return Y_0_TOP;
247 }
248 else {
249 /* Drawing into user-created FBO (very likely a texture).
250 *
251 * For textures, T=0=Bottom, so by extension Y=0=Bottom for rendering.
252 */
253 return Y_0_BOTTOM;
254 }
255 }
256
257
258 /** clear-alloc a struct-sized object, with casting */
259 #define ST_CALLOC_STRUCT(T) (struct T *) calloc(1, sizeof(struct T))
260
261
262 extern struct st_context *
263 st_create_context(gl_api api, struct pipe_context *pipe,
264 const struct gl_config *visual,
265 struct st_context *share,
266 const struct st_config_options *options);
267
268 extern void
269 st_destroy_context(struct st_context *st);
270
271
272 #endif