Atlas - SDL_vitaframebuffer.c
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[FILE BEGIN]
1/*
2  Simple DirectMedia Layer
3  Copyright (C) 1997-2025 Sam Lantinga <[email protected]>
4
5  This software is provided 'as-is', without any express or implied
6  warranty.  In no event will the authors be held liable for any damages
7  arising from the use of this software.
8
9  Permission is granted to anyone to use this software for any purpose,
10  including commercial applications, and to alter it and redistribute it
11  freely, subject to the following restrictions:
12
13  1. The origin of this software must not be misrepresented; you must not
14     claim that you wrote the original software. If you use this software
15     in a product, an acknowledgment in the product documentation would be
16     appreciated but is not required.
17  2. Altered source versions must be plainly marked as such, and must not be
18     misrepresented as being the original software.
19  3. This notice may not be removed or altered from any source distribution.
20*/
21#include "SDL_internal.h"
22
23#ifdef SDL_VIDEO_DRIVER_VITA
24
25#include "SDL_vitavideo.h"
26
27#include <psp2/kernel/sysmem.h>
28
29#define SCREEN_W             960
30#define SCREEN_H             544
31#define ALIGN(x, a)          (((x) + ((a)-1)) & ~((a)-1))
32#define DISPLAY_PIXEL_FORMAT SCE_DISPLAY_PIXELFORMAT_A8B8G8R8
33
34void *vita_gpu_alloc(unsigned int type, unsigned int size, SceUID *uid)
35{
36    void *mem;
37
38    if (type == SCE_KERNEL_MEMBLOCK_TYPE_USER_CDRAM_RW) {
39        size = ALIGN(size, 256 * 1024);
40    } else {
41        size = ALIGN(size, 4 * 1024);
42    }
43
44    *uid = sceKernelAllocMemBlock("gpu_mem", type, size, NULL);
45
46    if (*uid < 0) {
47        return NULL;
48    }
49
50    if (sceKernelGetMemBlockBase(*uid, &mem) < 0) {
51        return NULL;
52    }
53
54    return mem;
55}
56
57void vita_gpu_free(SceUID uid)
58{
59    void *mem = NULL;
60    if (sceKernelGetMemBlockBase(uid, &mem) < 0) {
61        return;
62    }
63    sceKernelFreeMemBlock(uid);
64}
65
66bool VITA_CreateWindowFramebuffer(SDL_VideoDevice *_this, SDL_Window *window, SDL_PixelFormat *format, void **pixels, int *pitch)
67{
68    SDL_WindowData *data = window->internal;
69    SceDisplayFrameBuf framebuf;
70
71    *format = SDL_PIXELFORMAT_ABGR8888;
72    *pitch = SCREEN_W * 4;
73
74    data->buffer = vita_gpu_alloc(
75        SCE_KERNEL_MEMBLOCK_TYPE_USER_CDRAM_RW,
76        4 * SCREEN_W * SCREEN_H,
77        &data->buffer_uid);
78
79    // SDL_memset the buffer to black
80    SDL_memset(data->buffer, 0x0, SCREEN_W * SCREEN_H * 4);
81
82    SDL_memset(&framebuf, 0x00, sizeof(SceDisplayFrameBuf));
83    framebuf.size = sizeof(SceDisplayFrameBuf);
84    framebuf.base = data->buffer;
85    framebuf.pitch = SCREEN_W;
86    framebuf.pixelformat = DISPLAY_PIXEL_FORMAT;
87    framebuf.width = SCREEN_W;
88    framebuf.height = SCREEN_H;
89    sceDisplaySetFrameBuf(&framebuf, SCE_DISPLAY_SETBUF_NEXTFRAME);
90
91    *pixels = data->buffer;
92
93    return true;
94}
95
96bool VITA_UpdateWindowFramebuffer(SDL_VideoDevice *_this, SDL_Window *window, const SDL_Rect *rects, int numrects)
97{
98    // do nothing
99    return true;
100}
101
102void VITA_DestroyWindowFramebuffer(SDL_VideoDevice *_this, SDL_Window *window)
103{
104    SDL_WindowData *data = window->internal;
105
106    if (!data) {
107        // The window wasn't fully initialized
108        return;
109    }
110
111    vita_gpu_free(data->buffer_uid);
112    data->buffer = NULL;
113    return;
114}
115
116#endif // SDL_VIDEO_DRIVER_VITA
117
[FILE END]
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