/************************************************************************** * * Copyright 2009 Marek Olšák * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sub license, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice (including the * next paragraph) shall be included in all copies or substantial portions * of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. * **************************************************************************/ #ifndef U_BLITTER_H #define U_BLITTER_H #include "util/u_framebuffer.h" #include "util/u_inlines.h" #include "util/u_memory.h" #include "pipe/p_state.h" #ifdef __cplusplus extern "C" { #endif struct pipe_context; enum blitter_attrib_type { UTIL_BLITTER_ATTRIB_NONE, UTIL_BLITTER_ATTRIB_COLOR, UTIL_BLITTER_ATTRIB_TEXCOORD }; struct blitter_context { /** * Draw a rectangle. * * \param x1 An X coordinate of the top-left corner. * \param y1 A Y coordinate of the top-left corner. * \param x2 An X coordinate of the bottom-right corner. * \param y2 A Y coordinate of the bottom-right corner. * \param depth A depth which the rectangle is rendered at. * * \param type Semantics of the attributes "attrib". * If type is UTIL_BLITTER_ATTRIB_NONE, ignore them. * If type is UTIL_BLITTER_ATTRIB_COLOR, the attributes * make up a constant RGBA color, and should go * to the GENERIC0 varying slot of a fragment shader. * If type is UTIL_BLITTER_ATTRIB_TEXCOORD, {a1, a2} and * {a3, a4} specify top-left and bottom-right texture * coordinates of the rectangle, respectively, and should go * to the GENERIC0 varying slot of a fragment shader. * * \param attrib See type. * * \note A driver may optionally override this callback to implement * a specialized hardware path for drawing a rectangle, e.g. using * a rectangular point sprite. */ void (*draw_rectangle)(struct blitter_context *blitter, unsigned x1, unsigned y1, unsigned x2, unsigned y2, float depth, enum blitter_attrib_type type, const float attrib[4]); /* Whether the blitter is running. */ boolean running; /* Private members, really. */ struct pipe_context *pipe; /**< pipe context */ void *saved_blend_state; /**< blend state */ void *saved_dsa_state; /**< depth stencil alpha state */ void *saved_velem_state; /**< vertex elements state */ void *saved_rs_state; /**< rasterizer state */ void *saved_fs, *saved_vs; /**< fragment shader, vertex shader */ struct pipe_framebuffer_state saved_fb_state; /**< framebuffer state */ struct pipe_stencil_ref saved_stencil_ref; /**< stencil ref */ struct pipe_viewport_state saved_viewport; struct pipe_clip_state saved_clip; int saved_num_sampler_states; void *saved_sampler_states[PIPE_MAX_SAMPLERS]; int saved_num_sampler_views; struct pipe_sampler_view *saved_sampler_views[PIPE_MAX_SAMPLERS]; int saved_num_vertex_buffers; struct pipe_vertex_buffer saved_vertex_buffers[PIPE_MAX_ATTRIBS]; }; /** * Create a blitter context. */ struct blitter_context *util_blitter_create(struct pipe_context *pipe); /** * Destroy a blitter context. */ void util_blitter_destroy(struct blitter_context *blitter); /** * Return the pipe context associated with a blitter context. */ static INLINE struct pipe_context *util_blitter_get_pipe(struct blitter_context *blitter) { return blitter->pipe; } /* * These CSOs must be saved before any of the following functions is called: * - blend state * - depth stencil alpha state * - rasterizer state * - vertex shader * - fragment shader */ /** * Clear a specified set of currently bound buffers to specified values. */ void util_blitter_clear(struct blitter_context *blitter, unsigned width, unsigned height, unsigned num_cbufs, unsigned clear_buffers, const float *rgba, double depth, unsigned stencil); void util_blitter_clear_depth_custom(struct blitter_context *blitter, unsigned width, unsigned height, double depth, void *custom_dsa); /** * Copy a block of pixels from one surface to another. * * You can copy from any color format to any other color format provided * the former can be sampled and the latter can be rendered to. Otherwise, * a software fallback path is taken and both surfaces must be of the same * format. * * The same holds for depth-stencil formats with the exception that stencil * cannot be copied unless you set ignore_stencil to FALSE. In that case, * a software fallback path is taken and both surfaces must be of the same * format. * * Use pipe_screen->is_format_supported to know your options. * * These states must be saved in the blitter in addition to the state objects * already required to be saved: * - framebuffer state * - fragment sampler states * - fragment sampler textures */ void util_blitter_copy_region(struct blitter_context *blitter, struct pipe_resource *dst, unsigned dstlevel, unsigned dstx, unsigned dsty, unsigned dstz, struct pipe_resource *src, unsigned srclevel, const struct pipe_box *srcbox, boolean ignore_stencil); /** * Clear a region of a (color) surface to a constant value. * * These states must be saved in the blitter in addition to the state objects * already required to be saved: * - framebuffer state */ void util_blitter_clear_render_target(struct blitter_context *blitter, struct pipe_surface *dst, const float *rgba, unsigned dstx, unsigned dsty, unsigned width, unsigned height); /** * Clear a region of a depth-stencil surface, both stencil and depth * or only one of them if this is a combined depth-stencil surface. * * These states must be saved in the blitter in addition to the state objects * already required to be saved: * - framebuffer state */ void util_blitter_clear_depth_stencil(struct blitter_context *blitter, struct pipe_surface *dst, unsigned clear_flags, double depth, unsigned stencil, unsigned dstx, unsigned dsty, unsigned width, unsigned height); void util_blitter_custom_depth_stencil(struct blitter_context *blitter, struct pipe_surface *zsurf, struct pipe_surface *cbsurf, void *dsa_stage, float depth); /* The functions below should be used to save currently bound constant state * objects inside a driver. The objects are automatically restored at the end * of the util_blitter_{clear, copy_region, fill_region} functions and then * forgotten. * * CSOs not listed here are not affected by util_blitter. */ static INLINE void util_blitter_save_blend(struct blitter_context *blitter, void *state) { blitter->saved_blend_state = state; } static INLINE void util_blitter_save_depth_stencil_alpha(struct blitter_context *blitter, void *state) { blitter->saved_dsa_state = state; } static INLINE void util_blitter_save_vertex_elements(struct blitter_context *blitter, void *state) { blitter->saved_velem_state = state; } static INLINE void util_blitter_save_stencil_ref(struct blitter_context *blitter, const struct pipe_stencil_ref *state) { blitter->saved_stencil_ref = *state; } static INLINE void util_blitter_save_rasterizer(struct blitter_context *blitter, void *state) { blitter->saved_rs_state = state; } static INLINE void util_blitter_save_fragment_shader(struct blitter_context *blitter, void *fs) { blitter->saved_fs = fs; } static INLINE void util_blitter_save_vertex_shader(struct blitter_context *blitter, void *vs) { blitter->saved_vs = vs; } static INLINE void util_blitter_save_framebuffer(struct blitter_context *blitter, const struct pipe_framebuffer_state *state) { blitter->saved_fb_state.nr_cbufs = 0; /* It's ~0 now, meaning it's unsaved. */ util_copy_framebuffer_state(&blitter->saved_fb_state, state); } static INLINE void util_blitter_save_viewport(struct blitter_context *blitter, struct pipe_viewport_state *state) { blitter->saved_viewport = *state; } static INLINE void util_blitter_save_clip(struct blitter_context *blitter, struct pipe_clip_state *state) { blitter->saved_clip = *state; } static INLINE void util_blitter_save_fragment_sampler_states( struct blitter_context *blitter, int num_sampler_states, void **sampler_states) { assert(num_sampler_states <= Elements(blitter->saved_sampler_states)); blitter->saved_num_sampler_states = num_sampler_states; memcpy(blitter->saved_sampler_states, sampler_states, num_sampler_states * sizeof(void *)); } static INLINE void util_blitter_save_fragment_sampler_views(struct blitter_context *blitter, int num_views, struct pipe_sampler_view **views) { unsigned i; assert(num_views <= Elements(blitter->saved_sampler_views)); blitter->saved_num_sampler_views = num_views; for (i = 0; i < num_views; i++) pipe_sampler_view_reference(&blitter->saved_sampler_views[i], views[i]); } static INLINE void util_blitter_save_vertex_buffers(struct blitter_context *blitter, int num_vertex_buffers, struct pipe_vertex_buffer *vertex_buffers) { assert(num_vertex_buffers <= Elements(blitter->saved_vertex_buffers)); blitter->saved_num_vertex_buffers = 0; util_copy_vertex_buffers(blitter->saved_vertex_buffers, (unsigned*)&blitter->saved_num_vertex_buffers, vertex_buffers, num_vertex_buffers); } #ifdef __cplusplus } #endif #endif