163 lines
4.8 KiB
C
163 lines
4.8 KiB
C
/**
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* @file lv_ctr_disp.c
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*
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*/
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#if 1
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/*********************
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* INCLUDES
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*********************/
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#include "lv_ctr_disp.h"
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#include <stdbool.h>
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#include <3ds.h>
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#include <citro3d.h>
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#include <citro2d.h>
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/*********************
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* DEFINES
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*********************/
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#define BOTTOM_DISP_HOR_RES 320
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#define BOTTOM_DISP_VER_RES 240
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#define BOTTOM_TEX_HOR_RES 512
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#define BOTTOM_TEX_VER_RES 256
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#define BYTE_PER_PIXEL (LV_COLOR_FORMAT_GET_SIZE(CTR_LV_COLOR_FORMAT))
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#define BOTTOM_DISP_STRIDE (BOTTOM_TEX_HOR_RES * BYTE_PER_PIXEL)
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#define BOTTOM_DISP_BUF_SIZE BOTTOM_DISP_STRIDE * BOTTOM_DISP_VER_RES
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/**********************
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* TYPEDEFS
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**********************/
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/**********************
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* STATIC PROTOTYPES
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**********************/
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static void disp_init(void);
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static void disp_flush(lv_display_t * disp, const lv_area_t * area, uint8_t * px_map);
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/* Calculate nearest power of 2 for a given size */
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__attribute__ ((const)) static inline u32 tex_pot(u32 x) {
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if (x < 32) return 32;
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return 1 << (32 - __builtin_clz(x - 1));
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}
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/**********************
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* STATIC VARIABLES
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**********************/
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C3D_RenderTarget *bottom_screen;
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C3D_Tex tex;
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Tex3DS_SubTexture subt3x;
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LV_ATTRIBUTE_MEM_ALIGN static uint8_t * buf_1 = NULL;
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LV_ATTRIBUTE_MEM_ALIGN static uint8_t * buf_2 = NULL;
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/**********************
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* MACROS
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**********************/
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/**********************
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* GLOBAL FUNCTIONS
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**********************/
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void lv_ctr_disp_init(void)
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{
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/*-------------------------
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* Initialize your display
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* -----------------------*/
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disp_init();
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/*------------------------------------
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* Create a display and set a flush_cb
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* -----------------------------------*/
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lv_display_t * bottom_disp = lv_display_create(BOTTOM_DISP_HOR_RES, BOTTOM_DISP_VER_RES);
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lv_display_set_color_format(bottom_disp, CTR_LV_COLOR_FORMAT);
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lv_display_set_flush_cb(bottom_disp, disp_flush);
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lv_display_set_default(bottom_disp);
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/* Two buffers for double buffering. */
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buf_1 = linearAlloc(BOTTOM_DISP_BUF_SIZE);
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buf_2 = linearAlloc(BOTTOM_DISP_BUF_SIZE);
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lv_display_set_buffers_with_stride(bottom_disp, buf_1, buf_2, BOTTOM_DISP_BUF_SIZE, BOTTOM_DISP_STRIDE, LV_DISPLAY_RENDER_MODE_DIRECT);
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}
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/**********************
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* STATIC FUNCTIONS
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**********************/
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/*Initialize your display and the required peripherals.*/
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static void disp_init(void)
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{
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C3D_Init(C3D_DEFAULT_CMDBUF_SIZE);
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C2D_Init(C2D_DEFAULT_MAX_OBJECTS);
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C2D_Prepare();
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bottom_screen = C2D_CreateScreenTarget(GFX_BOTTOM, GFX_LEFT);
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if(0 == C3D_TexInit(&tex, BOTTOM_TEX_HOR_RES, BOTTOM_TEX_VER_RES, CTR_TEX_COLOR_FORMAT)) puts("Could not create main texture.");
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memset(tex.data, 0xFF, tex.size);
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C3D_TexFlush(&tex);
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tex.border = 0xFFFFFFFF;
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C3D_TexSetWrap(&tex, GPU_CLAMP_TO_BORDER, GPU_CLAMP_TO_BORDER);
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subt3x.width = BOTTOM_DISP_HOR_RES;
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subt3x.height = BOTTOM_DISP_VER_RES;
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subt3x.left = 0.0f;
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subt3x.top = 1.0f;
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subt3x.right = (BOTTOM_DISP_HOR_RES/(float)tex.width);
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subt3x.bottom = (1.0f - BOTTOM_DISP_VER_RES/(float)tex.height);
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C3D_TexSetFilter(&tex, GPU_NEAREST, GPU_NEAREST);
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}
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volatile bool disp_flush_enabled = true;
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/* Enable updating the screen (the flushing process) when disp_flush() is called by LVGL
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*/
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void disp_enable_update(void)
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{
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disp_flush_enabled = true;
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}
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/* Disable updating the screen (the flushing process) when disp_flush() is called by LVGL
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*/
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void disp_disable_update(void)
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{
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disp_flush_enabled = false;
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}
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/*Flush the content of the internal buffer the specific area on the display.
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*`px_map` contains the rendered image as raw pixel map and it should be copied to `area` on the display.
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*You can use DMA or any hardware acceleration to do this operation in the background but
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*'lv_display_flush_ready()' has to be called when it's finished.*/
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static void disp_flush(lv_display_t * disp_drv, const lv_area_t * area, uint8_t * px_map)
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{
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if (lv_display_flush_is_last(disp_drv)) {
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GSPGPU_FlushDataCache(px_map, tex.width * tex.height * 4);
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u32 dim = GX_BUFFER_DIM(tex.width, tex.height);
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C3D_SyncDisplayTransfer((u32 *)px_map, dim, (u32*)tex.data, dim,
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(GX_TRANSFER_FLIP_VERT(0) | GX_TRANSFER_OUT_TILED(1) | GX_TRANSFER_RAW_COPY(0) |
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GX_TRANSFER_IN_FORMAT(CTR_TR_IN_COLOR_FORMAT) | GX_TRANSFER_OUT_FORMAT(CTR_TR_OUT_COLOR_FORMAT) |
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GX_TRANSFER_SCALING(GX_TRANSFER_SCALE_NO))
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);
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C3D_FrameBegin(C3D_FRAME_NONBLOCK);
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C2D_SceneBegin(bottom_screen);
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C2D_Image img = { &tex, &subt3x };
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C2D_DrawImageAt(img, 0, 0, 0.6f, NULL, 1.f, 1.f);
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C3D_FrameEnd(0);
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}
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lv_display_flush_ready(disp_drv);
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}
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#else /*Enable this file at the top*/
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/*This dummy typedef exists purely to silence -Wpedantic.*/
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typedef int keep_pedantic_happy;
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#endif
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