181 lines
5 KiB
C
181 lines
5 KiB
C
#include <stdint.h>
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#include <stdbool.h>
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#include <malloc.h>
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#include <coreinit/screen.h>
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#include <coreinit/cache.h>
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#include <vpad/input.h>
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#include <whb/proc.h>
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void quit(void);
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void welcome(OSScreenID screen);
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void drawScreen(OSScreenID screen, VPADTouchData gamepad, int color);
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int main(int argc, char **argv)
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{
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// initialize ProcUI and OSScreen
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WHBProcInit();
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OSScreenInit();
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// allocate memory to render both displays and align them
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size_t tvBufferSize = OSScreenGetBufferSizeEx(SCREEN_TV);
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size_t drcBufferSize = OSScreenGetBufferSizeEx(SCREEN_DRC);
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void *tvBuffer = memalign(0x100, tvBufferSize);
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void *drcBuffer = memalign(0x100, drcBufferSize);
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// free used video memory and deinitialize OSScreen and ProcUI
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void quit(void)
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{
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if (tvBuffer)
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free(tvBuffer);
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if (drcBuffer)
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free(drcBuffer);
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OSScreenShutdown();
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WHBProcShutdown();
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};
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// check if memory allocation was successful otherwise kill program
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if (!tvBuffer || !drcBuffer)
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{
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quit();
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return 1;
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}
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// tell the screens where the allocated memory is
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OSScreenSetBufferEx(SCREEN_TV, tvBuffer);
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OSScreenSetBufferEx(SCREEN_DRC, drcBuffer);
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// enable control of the displays
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OSScreenEnableEx(SCREEN_TV, true);
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OSScreenEnableEx(SCREEN_DRC, true);
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VPADStatus status;
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VPADReadError error;
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VPADTouchData gamepadTouchScreen;
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bool vpad_fatal = false;
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uint32_t penColor = 0xFFFFFF00;
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// welcome message
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void welcome(OSScreenID screen)
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{
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OSScreenPutFontEx(screen, 0, 0, "Welcome to SimpleDrawU!");
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OSScreenPutFontEx(screen, 0, 1, "A is red.");
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OSScreenPutFontEx(screen, 0, 2, "B is yellow.");
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OSScreenPutFontEx(screen, 0, 3, "X is blue.");
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OSScreenPutFontEx(screen, 0, 4, "Y is green.");
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OSScreenPutFontEx(screen, 0, 5, "Plus is white.");
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OSScreenPutFontEx(screen, 0, 6, "Minus is black (erase).");
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OSScreenPutFontEx(screen, 0, 7, "Press both Plus and Minus");
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OSScreenPutFontEx(screen, 0, 8, "to clear the screen, enjoy!");
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}
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welcome(SCREEN_TV);
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welcome(SCREEN_DRC);
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// define color palette
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enum penColor
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{
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white = 0xFFFFFF00,
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black = 0x00000000,
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red = 0xBF5B5B00,
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yellow = 0xC6B95500,
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blue = 0x3C8D8800,
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green = 0x86B46000,
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};
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// draw pixels to screen
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void drawScreen(OSScreenID screen, VPADTouchData gamepad, int color)
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{
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OSScreenPutPixelEx(screen, gamepad.x - 1, gamepad.y - 1, color);
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OSScreenPutPixelEx(screen, gamepad.x + 1, gamepad.y + 1, color);
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OSScreenPutPixelEx(screen, gamepad.x + 1, gamepad.y, color);
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OSScreenPutPixelEx(screen, gamepad.x - 1, gamepad.y, color);
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OSScreenPutPixelEx(screen, gamepad.x, gamepad.y, color);
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OSScreenPutPixelEx(screen, gamepad.x, gamepad.y + 1, color);
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OSScreenPutPixelEx(screen, gamepad.x, gamepad.y - 1, color);
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OSScreenPutPixelEx(screen, gamepad.x - 1, gamepad.y + 1, color);
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OSScreenPutPixelEx(screen, gamepad.x + 1, gamepad.y - 1, color);
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};
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// while ProcUI is running
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while (WHBProcIsRunning())
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{
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// read gamepad inputs and check if error
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VPADRead(VPAD_CHAN_0, &status, 1, &error);
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switch (error)
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{
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case VPAD_READ_SUCCESS:
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{
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VPADGetTPCalibratedPoint(VPAD_CHAN_0, &gamepadTouchScreen, &status.tpNormal);
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break;
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}
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case VPAD_READ_NO_SAMPLES:
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{
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continue;
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}
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case VPAD_READ_INVALID_CONTROLLER:
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{
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vpad_fatal = true;
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break;
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}
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default:
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{
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vpad_fatal = true;
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break;
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}
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}
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if (vpad_fatal)
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break;
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// clear screen
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if ((status.hold & VPAD_BUTTON_PLUS) && (status.hold & VPAD_BUTTON_MINUS))
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{
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OSScreenClearBufferEx(SCREEN_TV, black);
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OSScreenClearBufferEx(SCREEN_DRC, black);
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}
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// select color
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if (status.hold & VPAD_BUTTON_PLUS)
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{
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penColor = white;
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}
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if (status.hold & VPAD_BUTTON_MINUS)
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{
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penColor = black;
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}
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if (status.hold & VPAD_BUTTON_A)
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{
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penColor = red;
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}
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if (status.hold & VPAD_BUTTON_B)
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{
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penColor = yellow;
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}
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if (status.hold & VPAD_BUTTON_X)
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{
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penColor = blue;
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}
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if (status.hold & VPAD_BUTTON_Y)
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{
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penColor = green;
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}
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// draw on screen
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if (gamepadTouchScreen.touched)
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{
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drawScreen(SCREEN_TV, gamepadTouchScreen, penColor);
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drawScreen(SCREEN_DRC, gamepadTouchScreen, penColor);
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}
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// commit drawing to the screen
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DCFlushRange(tvBuffer, tvBufferSize);
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DCFlushRange(drcBuffer, drcBufferSize);
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OSScreenFlipBuffersEx(SCREEN_TV);
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OSScreenFlipBuffersEx(SCREEN_DRC);
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}
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quit();
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return 0;
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}
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