Qt Quick Ultralite imagedecoder Example

/****************************************************************************** ** ** Copyright (C) 2024 The Qt Company Ltd. ** Contact: https://www.qt.io/licensing/ ** ** This file is part of the Qt Quick Ultralite module. ** ** $QT_BEGIN_LICENSE:COMM$ ** ** Commercial License Usage ** Licensees holding valid commercial Qt licenses may use this file in ** accordance with the commercial license agreement provided with the ** Software or, alternatively, in accordance with the terms contained in ** a written agreement between you and The Qt Company. For licensing terms ** and conditions see http://www.qt.io/terms-conditions. For further ** information use the contact form at http://www.qt.io/contact-us. ** ** $QT_END_LICENSE$ ** ******************************************************************************/
#include "traveot2gimagedecoder.h" #include <ut_class_surface.h> extern "C" uint32_t Jpeg_DecStart(uint32_t, uint32_t, uint32_t); extern "C" uint32_t tvii_convert_decoded_buffers(unsigned char *, uint32_t, uint32_t, CYGFX_SM_FORMAT); static int16_t img_width, img_height; bool jpegInformation(Qul::PlatformInterface::ImageDecoder::RequestDataCallback &callback, int16_t *width, int16_t *height, Qul::PixelFormat *actualPixelFormat, Qul::PixelFormat optimalOpaquePixelFormat, Qul::PixelFormat optimalAlphaPixelFormat); TviiImageDecoder::TviiImageDecoder() {} TviiImageDecoder::~TviiImageDecoder() {} bool TviiImageDecoder::imageInformation(RequestDataCallback &callback, int16_t *width, int16_t *height, Qul::PixelFormat *actualPixelFormat, Qul::PixelFormat optimalOpaquePixelFormat, Qul::PixelFormat optimalAlphaPixelFormat) { bool ret = jpegInformation(callback, width, height, actualPixelFormat, optimalOpaquePixelFormat, optimalAlphaPixelFormat); img_width = *width; img_height = *height; return ret; } static CYGFX_SM_FORMAT convertFormat(Qul::PixelFormat format) { CYGFX_SM_FORMAT result = CYGFX_SM_FORMAT_A8R8G8B8; switch (format) { case Qul::PixelFormat_ARGB32: case Qul::PixelFormat_ARGB32_Premultiplied: result = CYGFX_SM_FORMAT_A8R8G8B8; break; case Qul::PixelFormat_RGB32: result = CYGFX_SM_FORMAT_X8R8G8B8; break; case Qul::PixelFormat_RGB888: result = CYGFX_SM_FORMAT_R8G8B8; break; case Qul::PixelFormat_RGB16: result = CYGFX_SM_FORMAT_R5G6B5; break; case Qul::PixelFormat_Alpha8: result = CYGFX_SM_FORMAT_A8; break; default: Qul::PlatformInterface::log("[%s] Unsupported Format! (%d)\n\r", __PRETTY_FUNCTION__, format); } return result; } int TviiImageDecoder::decodeImage(RequestDataCallback &callback, unsigned char *outbuffer, uint32_t outbufferSize, Qul::PixelFormat pixelFormat, uint32_t requiredBytesPerLine) { if (img_width % 64 != 0) { Qul::PlatformInterface::log("JPEG decoder requires source images width to be multiples of 64."); return -1; } unsigned int addr = (unsigned int) callback.rawData(); unsigned int size = callback.totalAvailableDataSize(); uint32_t stride = img_width; uint32_t ret = Jpeg_DecStart(addr, size, stride); if (ret != 0) { Qul::PlatformInterface::log("Jpeg_DecStart failed with return code %x\n", ret); return -1; } ret = tvii_convert_decoded_buffers(outbuffer, (uint32_t) img_width, (uint32_t) img_height, convertFormat(pixelFormat)); if (ret != 0) { Qul::PlatformInterface::log("tvii_convert_decoded_buffers failed with return code %x\n", ret); } return ret; }