mirror of
https://github.com/brl/mutter.git
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8e204e036a
As we will start adding support for more pixel formats, we will need to define a notion of planes. This commit doesn't make any functional change, but starts adding the idea of pixel formats and how they (at this point only theoretically) can have multple planes. Since a lot of code in Mutter assumes we only get to deal with single plane pixel formats, this commit also adds assertions and if-checks to make sure we don't accidentally try something that doesn't make sense. https://gitlab.gnome.org/GNOME/mutter/merge_requests/858
444 lines
14 KiB
C
444 lines
14 KiB
C
/*
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* Cogl
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*
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* A Low Level GPU Graphics and Utilities API
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*
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* Copyright (C) 2011 Intel Corporation.
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* Copyright (C) 2019 DisplayLink (UK) Ltd.
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation
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* files (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use, copy,
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* modify, merge, publish, distribute, sublicense, and/or sell copies
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* of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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* Authors:
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* Neil Roberts <neil@linux.intel.com>
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*/
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#include "cogl-config.h"
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#include <string.h>
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#include "cogl-util.h"
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#include "cogl-blit.h"
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#include "cogl-context-private.h"
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#include "cogl-framebuffer-private.h"
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#include "cogl-texture-private.h"
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#include "cogl-texture-2d-private.h"
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#include "cogl-private.h"
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#include "cogl1-context.h"
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static const CoglBlitMode *_cogl_blit_default_mode = NULL;
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static gboolean
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_cogl_blit_texture_render_begin (CoglBlitData *data)
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{
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CoglContext *ctx = data->src_tex->context;
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CoglOffscreen *offscreen;
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CoglFramebuffer *fb;
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CoglPipeline *pipeline;
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unsigned int dst_width, dst_height;
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GError *ignore_error = NULL;
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offscreen = _cogl_offscreen_new_with_texture_full
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(data->dst_tex, COGL_OFFSCREEN_DISABLE_DEPTH_AND_STENCIL, 0 /* level */);
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fb = COGL_FRAMEBUFFER (offscreen);
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if (!cogl_framebuffer_allocate (fb, &ignore_error))
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{
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g_error_free (ignore_error);
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cogl_object_unref (fb);
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return FALSE;
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}
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data->dest_fb = fb;
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dst_width = cogl_texture_get_width (data->dst_tex);
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dst_height = cogl_texture_get_height (data->dst_tex);
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/* Set up an orthographic projection so we can use pixel
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coordinates to render to the texture */
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cogl_framebuffer_orthographic (fb,
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0, 0, dst_width, dst_height,
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-1 /* near */, 1 /* far */);
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/* We cache a pipeline used for migrating on to the context so
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that it doesn't have to continuously regenerate a shader
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program */
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if (ctx->blit_texture_pipeline == NULL)
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{
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ctx->blit_texture_pipeline = cogl_pipeline_new (ctx);
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cogl_pipeline_set_layer_filters (ctx->blit_texture_pipeline, 0,
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COGL_PIPELINE_FILTER_NEAREST,
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COGL_PIPELINE_FILTER_NEAREST);
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/* Disable blending by just directly taking the contents of the
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source texture */
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cogl_pipeline_set_blend (ctx->blit_texture_pipeline,
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"RGBA = ADD(SRC_COLOR, 0)",
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NULL);
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}
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pipeline = ctx->blit_texture_pipeline;
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cogl_pipeline_set_layer_texture (pipeline, 0, data->src_tex);
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data->pipeline = pipeline;
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return TRUE;
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}
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static void
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_cogl_blit_texture_render_blit (CoglBlitData *data,
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int src_x,
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int src_y,
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int dst_x,
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int dst_y,
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int width,
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int height)
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{
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cogl_framebuffer_draw_textured_rectangle (data->dest_fb,
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data->pipeline,
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dst_x, dst_y,
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dst_x + width,
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dst_y + height,
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src_x / (float) data->src_width,
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src_y / (float) data->src_height,
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(src_x + width) /
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(float) data->src_width,
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(src_y + height) /
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(float) data->src_height);
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}
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static void
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_cogl_blit_texture_render_end (CoglBlitData *data)
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{
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CoglContext *ctx = data->src_tex->context;
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/* Attach the target texture to the texture render pipeline so that
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we don't keep a reference to the source texture forever. This is
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assuming that the destination texture will live for a long time
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which is currently the case when cogl_blit_* is used from the
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atlas code. It may be better in future to keep around a set of
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dummy 1x1 textures for each texture target that we could bind
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instead. This would also be useful when using a pipeline as a
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hash table key such as for the ARBfp program cache. */
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cogl_pipeline_set_layer_texture (ctx->blit_texture_pipeline, 0,
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data->dst_tex);
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cogl_object_unref (data->dest_fb);
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}
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static gboolean
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_cogl_blit_framebuffer_begin (CoglBlitData *data)
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{
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CoglContext *ctx = data->src_tex->context;
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CoglOffscreen *dst_offscreen = NULL, *src_offscreen = NULL;
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CoglFramebuffer *dst_fb, *src_fb;
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GError *ignore_error = NULL;
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/* We can only blit between FBOs if both textures have the same
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premult convention and the blit framebuffer extension is
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supported. */
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if ((_cogl_texture_get_format (data->src_tex) & COGL_PREMULT_BIT) !=
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(_cogl_texture_get_format (data->dst_tex) & COGL_PREMULT_BIT) ||
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!_cogl_has_private_feature (ctx, COGL_PRIVATE_FEATURE_BLIT_FRAMEBUFFER))
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return FALSE;
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dst_offscreen = _cogl_offscreen_new_with_texture_full
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(data->dst_tex, COGL_OFFSCREEN_DISABLE_DEPTH_AND_STENCIL, 0 /* level */);
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dst_fb = COGL_FRAMEBUFFER (dst_offscreen);
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if (!cogl_framebuffer_allocate (dst_fb, &ignore_error))
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{
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g_error_free (ignore_error);
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goto error;
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}
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src_offscreen= _cogl_offscreen_new_with_texture_full
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(data->src_tex,
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COGL_OFFSCREEN_DISABLE_DEPTH_AND_STENCIL,
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0 /* level */);
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src_fb = COGL_FRAMEBUFFER (src_offscreen);
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if (!cogl_framebuffer_allocate (src_fb, &ignore_error))
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{
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g_error_free (ignore_error);
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goto error;
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}
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data->src_fb = src_fb;
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data->dest_fb = dst_fb;
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return TRUE;
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error:
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if (dst_offscreen)
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cogl_object_unref (dst_offscreen);
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if (src_offscreen)
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cogl_object_unref (src_offscreen);
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return FALSE;
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}
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static void
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_cogl_blit_framebuffer_blit (CoglBlitData *data,
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int src_x,
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int src_y,
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int dst_x,
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int dst_y,
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int width,
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int height)
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{
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cogl_blit_framebuffer (data->src_fb,
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data->dest_fb,
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src_x, src_y,
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dst_x, dst_y,
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width, height,
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NULL);
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}
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static void
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_cogl_blit_framebuffer_end (CoglBlitData *data)
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{
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cogl_object_unref (data->src_fb);
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cogl_object_unref (data->dest_fb);
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}
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static gboolean
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_cogl_blit_copy_tex_sub_image_begin (CoglBlitData *data)
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{
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CoglOffscreen *offscreen;
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CoglFramebuffer *fb;
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GError *ignore_error = NULL;
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/* This will only work if the target texture is a CoglTexture2D */
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if (!cogl_is_texture_2d (data->dst_tex))
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return FALSE;
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offscreen = _cogl_offscreen_new_with_texture_full
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(data->src_tex, COGL_OFFSCREEN_DISABLE_DEPTH_AND_STENCIL, 0 /* level */);
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fb = COGL_FRAMEBUFFER (offscreen);
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if (!cogl_framebuffer_allocate (fb, &ignore_error))
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{
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g_error_free (ignore_error);
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cogl_object_unref (fb);
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return FALSE;
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}
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data->src_fb = fb;
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return TRUE;
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}
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static void
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_cogl_blit_copy_tex_sub_image_blit (CoglBlitData *data,
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int src_x,
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int src_y,
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int dst_x,
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int dst_y,
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int width,
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int height)
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{
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_cogl_texture_2d_copy_from_framebuffer (COGL_TEXTURE_2D (data->dst_tex),
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src_x, src_y,
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width, height,
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data->src_fb,
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dst_x, dst_y,
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0); /* level */
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}
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static void
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_cogl_blit_copy_tex_sub_image_end (CoglBlitData *data)
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{
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cogl_object_unref (data->src_fb);
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}
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static gboolean
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_cogl_blit_get_tex_data_begin (CoglBlitData *data)
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{
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data->format = _cogl_texture_get_format (data->src_tex);
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g_return_val_if_fail (cogl_pixel_format_get_n_planes (data->format) == 1,
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FALSE);
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data->bpp = cogl_pixel_format_get_bytes_per_pixel (data->format, 0);
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data->image_data = g_malloc (data->bpp * data->src_width *
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data->src_height);
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cogl_texture_get_data (data->src_tex, data->format,
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data->src_width * data->bpp, data->image_data);
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return TRUE;
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}
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static void
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_cogl_blit_get_tex_data_blit (CoglBlitData *data,
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int src_x,
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int src_y,
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int dst_x,
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int dst_y,
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int width,
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int height)
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{
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GError *ignore = NULL;
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int rowstride = data->src_width * data->bpp;
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int offset = rowstride * src_y + src_x * data->bpp;
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_cogl_texture_set_region (data->dst_tex,
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width, height,
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data->format,
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rowstride,
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data->image_data + offset,
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dst_x, dst_y,
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0, /* level */
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&ignore);
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/* TODO: support chaining up errors during the blit */
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}
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static void
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_cogl_blit_get_tex_data_end (CoglBlitData *data)
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{
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g_free (data->image_data);
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}
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/* These should be specified in order of preference */
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static const CoglBlitMode
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_cogl_blit_modes[] =
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{
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{
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"texture-render",
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_cogl_blit_texture_render_begin,
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_cogl_blit_texture_render_blit,
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_cogl_blit_texture_render_end
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},
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{
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"framebuffer",
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_cogl_blit_framebuffer_begin,
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_cogl_blit_framebuffer_blit,
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_cogl_blit_framebuffer_end
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},
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{
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"copy-tex-sub-image",
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_cogl_blit_copy_tex_sub_image_begin,
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_cogl_blit_copy_tex_sub_image_blit,
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_cogl_blit_copy_tex_sub_image_end
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},
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{
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"get-tex-data",
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_cogl_blit_get_tex_data_begin,
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_cogl_blit_get_tex_data_blit,
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_cogl_blit_get_tex_data_end
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}
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};
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void
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_cogl_blit_begin (CoglBlitData *data,
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CoglTexture *dst_tex,
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CoglTexture *src_tex)
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{
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int i;
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if (_cogl_blit_default_mode == NULL)
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{
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const char *default_mode_string;
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/* Allow the default to be specified with an environment
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variable. For the time being these functions are only used
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when blitting between atlas textures so the environment
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variable is named to be specific to the atlas code. If we
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want to use the code in other places we should create another
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environment variable for each specific use case */
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if ((default_mode_string = g_getenv ("COGL_ATLAS_DEFAULT_BLIT_MODE")))
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{
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for (i = 0; i < G_N_ELEMENTS (_cogl_blit_modes); i++)
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if (!strcmp (_cogl_blit_modes[i].name, default_mode_string))
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{
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_cogl_blit_default_mode = _cogl_blit_modes + i;
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break;
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}
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if (i >= G_N_ELEMENTS (_cogl_blit_modes))
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{
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g_warning ("Unknown blit mode %s", default_mode_string);
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_cogl_blit_default_mode = _cogl_blit_modes;
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}
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}
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else
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/* Default to the first blit mode */
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_cogl_blit_default_mode = _cogl_blit_modes;
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}
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memset (data, 0, sizeof (CoglBlitData));
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data->dst_tex = dst_tex;
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data->src_tex = src_tex;
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data->src_width = cogl_texture_get_width (src_tex);
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data->src_height = cogl_texture_get_height (src_tex);
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/* Try the default blit mode first */
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if (!_cogl_blit_default_mode->begin_func (data))
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{
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COGL_NOTE (ATLAS, "Failed to set up blit mode %s",
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_cogl_blit_default_mode->name);
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/* Try all of the other modes in order */
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for (i = 0; i < G_N_ELEMENTS (_cogl_blit_modes); i++)
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if (_cogl_blit_modes + i != _cogl_blit_default_mode &&
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_cogl_blit_modes[i].begin_func (data))
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{
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/* Use this mode as the default from now on */
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_cogl_blit_default_mode = _cogl_blit_modes + i;
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break;
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}
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else
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COGL_NOTE (ATLAS,
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"Failed to set up blit mode %s",
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_cogl_blit_modes[i].name);
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/* The last blit mode can't fail so this should never happen */
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g_return_if_fail (i < G_N_ELEMENTS (_cogl_blit_modes));
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}
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data->blit_mode = _cogl_blit_default_mode;
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COGL_NOTE (ATLAS, "Setup blit using %s", _cogl_blit_default_mode->name);
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}
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void
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_cogl_blit (CoglBlitData *data,
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int src_x,
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int src_y,
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int dst_x,
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int dst_y,
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int width,
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int height)
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{
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data->blit_mode->blit_func (data, src_x, src_y, dst_x, dst_y, width, height);
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}
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void
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_cogl_blit_end (CoglBlitData *data)
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{
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data->blit_mode->end_func (data);
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}
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