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Diffstat (limited to 'mesalib/src/gallium/auxiliary/util/u_blitter.h')
| -rw-r--r-- | mesalib/src/gallium/auxiliary/util/u_blitter.h | 338 |
1 files changed, 338 insertions, 0 deletions
diff --git a/mesalib/src/gallium/auxiliary/util/u_blitter.h b/mesalib/src/gallium/auxiliary/util/u_blitter.h new file mode 100644 index 000000000..e59fe6b51 --- /dev/null +++ b/mesalib/src/gallium/auxiliary/util/u_blitter.h @@ -0,0 +1,338 @@ +/**************************************************************************
+ *
+ * Copyright 2009 Marek Olšák <maraeo@gmail.com>
+ *
+ * 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
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