mirror of
https://github.com/Ryujinx/SDL.git
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135 lines
3.6 KiB
C
135 lines
3.6 KiB
C
/*
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Simple DirectMedia Layer
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Copyright (C) 1997-2017 Sam Lantinga <slouken@libsdl.org>
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
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claim that you wrote the original software. If you use this software
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in a product, an acknowledgment in the product documentation would be
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appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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*/
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/*
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Contributed by Brandon Schaefer, <brandon.schaefer@canonical.com>
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*/
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#include "../../SDL_internal.h"
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#if SDL_VIDEO_DRIVER_MIR
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#include "SDL_mirevents.h"
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#include "SDL_mirframebuffer.h"
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#include "SDL_mirwindow.h"
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#include "SDL_mirdyn.h"
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int
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MIR_CreateWindowFramebuffer(_THIS, SDL_Window* window, Uint32* format,
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void** pixels, int* pitch)
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{
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MIR_Data* mir_data = _this->driverdata;
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mir_data->software = SDL_TRUE;
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if (MIR_CreateWindow(_this, window) < 0)
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return SDL_SetError("Failed to create a mir window.");
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*format = MIR_GetSDLPixelFormat(mir_data->pixel_format);
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if (*format == SDL_PIXELFORMAT_UNKNOWN)
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return SDL_SetError("Unknown pixel format");
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*pitch = (((window->w * SDL_BYTESPERPIXEL(*format)) + 3) & ~3);
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*pixels = SDL_malloc(window->h*(*pitch));
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if (*pixels == NULL)
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return SDL_OutOfMemory();
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return 0;
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}
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int
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MIR_UpdateWindowFramebuffer(_THIS, SDL_Window* window,
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const SDL_Rect* rects, int numrects)
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{
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MIR_Window* mir_window = window->driverdata;
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MirGraphicsRegion region;
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MirBufferStream* bs;
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int i, j, x, y, w, h, start;
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int bytes_per_pixel, bytes_per_row, s_stride, d_stride;
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char* s_dest;
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char* pixels;
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bs = MIR_mir_window_get_buffer_stream(mir_window->window);
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MIR_mir_buffer_stream_get_graphics_region(bs, ®ion);
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s_dest = region.vaddr;
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pixels = (char*)window->surface->pixels;
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s_stride = window->surface->pitch;
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d_stride = region.stride;
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bytes_per_pixel = window->surface->format->BytesPerPixel;
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for (i = 0; i < numrects; i++) {
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s_dest = region.vaddr;
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pixels = (char*)window->surface->pixels;
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x = rects[i].x;
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y = rects[i].y;
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w = rects[i].w;
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h = rects[i].h;
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if (w <= 0 || h <= 0 || (x + w) <= 0 || (y + h) <= 0)
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continue;
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if (x < 0) {
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x += w;
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w += rects[i].x;
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}
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if (y < 0) {
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y += h;
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h += rects[i].y;
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}
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if (x + w > window->w)
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w = window->w - x;
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if (y + h > window->h)
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h = window->h - y;
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start = y * s_stride + x;
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pixels += start;
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s_dest += start;
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bytes_per_row = bytes_per_pixel * w;
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for (j = 0; j < h; j++) {
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SDL_memcpy(s_dest, pixels, bytes_per_row);
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pixels += s_stride;
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s_dest += d_stride;
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}
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}
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MIR_mir_buffer_stream_swap_buffers_sync(bs);
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return 0;
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}
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void
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MIR_DestroyWindowFramebuffer(_THIS, SDL_Window* window)
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{
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}
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#endif /* SDL_VIDEO_DRIVER_MIR */
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/* vi: set ts=4 sw=4 expandtab: */
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