A basic graphics package for the LPC4088 Display Module.
Dependents: lpc4088_displaymodule_demo_sphere sampleGUI sampleEmptyGUI lpc4088_displaymodule_fs_aid ... more
Fork of DMBasicGUI by
Diff: SlideShow/SlideShow.cpp
- Revision:
- 5:f4de114c31c3
- Child:
- 10:651861441108
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/SlideShow/SlideShow.cpp Sun Dec 21 13:53:07 2014 +0100 @@ -0,0 +1,914 @@ +#include "SlideShow.h" +#include "Image.h" +#include "mbed_debug.h" +#include "DMBoard.h" + +/****************************************************************************** + * Defines and typedefs + *****************************************************************************/ + +#define SLIDESHOW_DBG 0 + +#define NO_SLOT -12 /* Some constant to indicate that no slot is in use */ + +/* Helper macros for the Fade transition */ +#define FADE_XRED(__in) (((__in)>>11)&0x1f) +#define FADE_XGREEN(__in) (((__in)>>6)&0x3f) +#define FADE_XBLUE(__in) ((__in)&0x1f) +#define FADE_COMBINE(__old, __new, __mul) \ + ( ((((FADE_XRED(__old)*(8-(__mul)))+(FADE_XRED(__new)*(__mul)))>>3)<<11) \ + | ((((FADE_XGREEN(__old)*(8-(__mul)))+(FADE_XGREEN(__new)*(__mul)))>>3)<<5) \ + | (((FADE_XBLUE(__old)*(8-(__mul)))+(FADE_XBLUE(__new)*(__mul)))>>3) ) + + +/****************************************************************************** + * Global variables + *****************************************************************************/ + +extern volatile uint32_t msTicks; + +/****************************************************************************** + * Private Functions + *****************************************************************************/ + +void SlideShow::Command::print() +{ + switch(type) + { + case Clear: + printf("CMD: Clear screen\n"); + break; + case Goto: + printf("CMD: Goto command %d\n", information); + break; + case LoadImage: + printf("CMD: Load file %s into [%d]\n", fname, information); + break; + case Show: + printf("CMD: Show image [%d] with %s transition\n", information, transition->typeString()); + break; + case Wait: + printf("CMD: Wait %d ms\n", information); + break; + case Callout: + printf("CMD: Callout %d\n", information); + break; + default: + printf("Unknown command\n"); + } +} + +SlideShow::SlideShowError SlideShow::Command::handle(SlideShow* ss, int* seqIdx, int* lastTime) +{ + SlideShowError result = Ok; + + //printf("[%03d] ", *seqIdx); print(); + switch (type) + { + case Clear: + // Use the 3rd back buffer as a fake image for the transition + Image::ImageData_t d; + d.height = ss->screenHeight; + d.width = ss->screenWidth; + d.pixels = &ss->ImageBackBuffer[ss->screenPixels*2]; + d.pointerToFree = NULL; + memset(d.pixels, information, ss->screenBytes); + if (ss->CurrentSlot == NO_SLOT) { + result = transition->execute(ss, NULL, &d); + } else { + result = transition->execute(ss, &(ss->PreparedImages[ss->CurrentSlot]), &d); + } + *lastTime = msTicks; + *seqIdx+=1; + break; + + case Goto: + *seqIdx = information; + break; + + case LoadImage: + if ((result = ss->loadImage(fname, information)) != Ok) + { + printf("Failed to load image. Aborting...\n"); + break; + } + *seqIdx+=1; + break; + + case Show: + if (ss->CurrentSlot == NO_SLOT) { + result = transition->execute(ss, NULL, &(ss->PreparedImages[information])); + } else { + result = transition->execute(ss, &(ss->PreparedImages[ss->CurrentSlot]), &(ss->PreparedImages[information])); + } + if (result != Ok) { + printf("Failed to show image. Aborting...\n"); + break; + } + ss->CurrentSlot = information; + *lastTime = msTicks; + *seqIdx+=1; + break; + + case Wait: + ss->delay(*lastTime, information); + *lastTime = msTicks; + *seqIdx+=1; + break; + + case Callout: + if (ss->callout != NULL) { + result = ss->callout(ss->calloutId, ss, information); + } else { + // Silently accept that no callout listener is registered + } + *seqIdx+=1; + break; + + default: + printf("Found unknown command at index %d\n", *seqIdx); + result = InvalidScript; + } + return result; +} + +SlideShow::SlideShowError SlideShow::Transition::execute(SlideShow* ss, Image::ImageData_t* CurrentImage, Image::ImageData_t* NewImage) +{ + SlideShowError result = Ok; + + do { + + // TODO: This would be a good place to handle rendering of differently sized images, + // could unregister+register if NewImage is different from CurrentImage + + // Register with the Renderer if needed. + if (ss->rendHnd == 0) { + if (ss->rend == NULL) { + printf("No registered renderer\n"); + result = RuntimeError; + break; + } + + // time to register with the renderer + ss->rendHnd = ss->rend->registerUser(ss->layer, ss->drawXoff, ss->drawYoff, + NewImage->width, NewImage->height); + if (ss->rendHnd == 0) { + printf("Failed to register with renderer\n"); + result = RuntimeError; + break; + } + } + + switch (t) { + case None: + { + ss->rend->setFramebuffer(ss->rendHnd, NewImage->pixels); + } + break; + + case LeftRight: // TODO: Note that this transition is only implemented for fullscreen mode + { + // Create a buffer with the old image + if (CurrentImage == NULL) { + memset(ss->ImageBackBuffer, 0, ss->screenBytes); + } else { + memcpy(ss->ImageBackBuffer, CurrentImage->pixels, ss->screenBytes); + } + int end = ss->screenWidth - LeftRight_PixelsToSkip; + for (int x = 0; x < end; x += LeftRight_PixelsToSkip) + { + int off = 0; + for (int y = 0; y < ss->screenHeight; y++) + { + memcpy(ss->ImageBackBuffer + (off+x), NewImage->pixels + (off+x), + LeftRight_PixelsToSkip*sizeof(uint16_t)); + off += ss->screenWidth; + } + + // Show the updated image + ss->rend->setFramebuffer(ss->rendHnd, ss->ImageBackBuffer); + + // Sleep and do over again + wait_ms(LeftRight_DelayMs); + } + + // Show final image + ss->rend->setFramebuffer(ss->rendHnd, NewImage->pixels); + } + break; + + case DownUp: // TODO: Note that this transition is only implemented for fullscreen mode + { + // Create a buffer with the two images after each other, NewImage below + if (CurrentImage == NULL) { + memset(ss->ImageBackBuffer, 0, ss->screenBytes); + } else { + memcpy(ss->ImageBackBuffer, CurrentImage->pixels, ss->screenBytes); + } + memcpy(ss->ImageBackBuffer+ss->screenPixels, NewImage->pixels, ss->screenBytes); + + // We will be using a back buffer + for (int i = DownUp_LineSkip/2; i < (ss->screenHeight-1); i+=DownUp_LineSkip) + { + // Show image by advancing what is shown one line at a time + ss->rend->setFramebuffer(ss->rendHnd, ss->ImageBackBuffer + i*ss->screenWidth); + + // Sleep and do over again + wait_ms(DownUp_DelayMs); + } + + // show final image + ss->rend->setFramebuffer(ss->rendHnd, NewImage->pixels); + } + break; + + case TopDown: // TODO: Note that this transition is only implemented for fullscreen mode + { + // Create a buffer with the two images after each other, NewImage above + if (CurrentImage == NULL) { + memset(ss->ImageBackBuffer+ss->screenPixels, 0, ss->screenBytes); + } else { + memcpy(ss->ImageBackBuffer+ss->screenPixels, CurrentImage->pixels, ss->screenBytes); + } + memcpy(ss->ImageBackBuffer, NewImage->pixels, ss->screenBytes); + + // We will be using a back buffer + for (int i = ss->screenHeight - TopDown_LineSkip/2; i > 0; i-=TopDown_LineSkip) + { + // Show image by advancing what is shown one line at a time + ss->rend->setFramebuffer(ss->rendHnd, ss->ImageBackBuffer + i*ss->screenWidth); + + // Sleep and do over again + wait_ms(TopDown_DelayMs); + } + + // show final image + ss->rend->setFramebuffer(ss->rendHnd, NewImage->pixels); + } + break; + + case Blinds: + { + int i; + int blockNumPixels = Blinds_LinesPerBlock * ss->screenWidth; + int blockNumBytes = blockNumPixels * sizeof(uint16_t); + image_t beamBlock = ss->ImageBackBuffer + ss->screenPixels; + image_t bkgBlock = beamBlock + blockNumPixels; + + // Create a buffer with the old image + if (CurrentImage == NULL) { + memset(ss->ImageBackBuffer, 0, ss->screenBytes); + } else { + memcpy(ss->ImageBackBuffer, CurrentImage->pixels, ss->screenBytes); + } + + // Create the two coloured blocks + memset(beamBlock, Blinds_BeamColor, blockNumBytes); + memset(bkgBlock, Blinds_BackColor, blockNumBytes); + + for (i = 0; i < ss->screenPixels; i += blockNumPixels) + { + // Draw the moving beam, erasing the old image + memcpy(ss->ImageBackBuffer+i, beamBlock, blockNumBytes); + + // Fill upp behind the beam with background color + if (i > 0) { + memcpy(ss->ImageBackBuffer+i-blockNumPixels, bkgBlock, blockNumBytes); + } + + // Show the updated image + ss->rend->setFramebuffer(ss->rendHnd, ss->ImageBackBuffer); + + // Sleep and do over again + wait_ms(Blinds_DelayMs); + } + memcpy(ss->ImageBackBuffer+i-blockNumPixels, bkgBlock, blockNumBytes); + ss->rend->setFramebuffer(ss->rendHnd, ss->ImageBackBuffer); + wait_ms(Blinds_DelayMs); + + for (i = 0; i < ss->screenPixels; i += blockNumPixels) + { + // Draw the moving beam, erasing the old image + memcpy(ss->ImageBackBuffer+i, beamBlock, blockNumBytes); + + // Fill upp behind the beam with the new image + if (i > 0) { + memcpy(ss->ImageBackBuffer+i-blockNumPixels, NewImage->pixels+i-blockNumPixels, blockNumBytes); + } + + // Show image by advancing what is shown one line at a time + ss->rend->setFramebuffer(ss->rendHnd, ss->ImageBackBuffer); + + // Sleep and do over again + wait_ms(Blinds_DelayMs); + } + + // show final image + ss->rend->setFramebuffer(ss->rendHnd, NewImage->pixels); + } + break; + + case Fade: + { + // Create a buffer with the old image + if (CurrentImage == NULL) { + memset(ss->ImageBackBuffer, 0, ss->screenBytes * 2); // use an extra backbuffer + } else { + memcpy(ss->ImageBackBuffer, CurrentImage->pixels, ss->screenBytes); + } + + int firstY = 0; + int lastY = NewImage->height; + for (int y = 0, off=0; y < NewImage->height; y++) { + for (int x = 0; x < NewImage->width; x++) { + off++; + if (NewImage->pixels[off] != ss->ImageBackBuffer[off]) { + firstY = y; + y = NewImage->height; + break; + } + } + } + for (int y = NewImage->height-1, off=NewImage->height*NewImage->width-1; y > firstY; y--) { + for (int x = 0; x < NewImage->width; x++) { + off--; + if (NewImage->pixels[off] != ss->ImageBackBuffer[off]) { + lastY = y; + y = -1; + break; + } + } + } + + // Gradually fade between the old and new images + for (int pass = 1; pass < 8; pass++) + { + uint16_t* oldImg = CurrentImage==NULL ? &ss->ImageBackBuffer[ss->screenPixels] : &CurrentImage->pixels[firstY*NewImage->width]; + uint16_t* newImg = &NewImage->pixels[firstY*NewImage->width]; + uint16_t* dstImg = &ss->ImageBackBuffer[firstY*NewImage->width]; + for (int y = firstY; y <= lastY; y++) + { + for (int x = 0; x < NewImage->width; x++) + { + if (*oldImg != *newImg) { + *dstImg = FADE_COMBINE(*oldImg, *newImg, pass); + } + oldImg++; + newImg++; + dstImg++; + } + } + // Show the updated image + ss->rend->setFramebuffer(ss->rendHnd, ss->ImageBackBuffer); + + // Sleep and do over again + wait_ms(Fade_DelayMs); + } + + // show final image + ss->rend->setFramebuffer(ss->rendHnd, NewImage->pixels); + } + break; + + case Unknown: + default: + result = RuntimeError; + } + } while(0); + + return result; +} + +SlideShow::SlideShowError SlideShow::loadFile(const char* path, uint8_t** pData, uint32_t* pSize) +{ + FILE* f = NULL; + uint32_t pos, size, num; + SlideShowError result = Ok; + + *pData = NULL; + *pSize = 0; + + if (fileMutex != NULL) { + fileMutex->lock(); + } + do + { + f = fopen(path, "r"); + if (f == NULL) { + printf("Failed to open file %s for reading\n", path); + result = FileError; + break; + } + + // Determine file size + pos = ftell(f); + fseek(f, 0, SEEK_END); + size = ftell(f); + fseek(f, pos, SEEK_SET); + + // Allocate memory to read into + *pData = (unsigned char*)malloc(size); + if (*pData == NULL) { + printf("Failed to allocate %u bytes to load %s into\n", size, path); + result = OutOfMemory; + break; + } + + // Read entire file + *pSize = size; + pos = 0; + do { + num = fread(*pData + pos, 1, size, f); + if (num > 0) { + size -= num; + pos += num; + } + } while ((num > 0) && (size > 0)); + + if (size != 0) { + printf("Failed to read entire %s, got %u of %ul\n", path, pos, *pSize); + result = FileError; + break; + } + + // All OK + + } while(0); + + if (f != NULL) { + fclose(f); + } + if (result != Ok) { + if (*pData != NULL) { + free(*pData); + *pData = NULL; + *pSize = 0; + } + } + + if (fileMutex != NULL) { + fileMutex->unlock(); + } + + return result; +} + + +// pBuf in, pOffset in/out, pLine out +// returns 0 as long as a token is found +int SlideShow::getNextLine(char* pBuf, int* pOffset, char** ppLine) +{ + int pos = *pOffset; + int result = -1; + + // trim whitespace from start of line + while ((pBuf[pos] == ' ') || (pBuf[pos] == '\t')) + { + pos++; + } + *ppLine = &(pBuf[pos]); + + while (pBuf[pos] != '\0') + { + if ((pBuf[pos] == '\r') || (pBuf[pos] == '\n')) + { + // found the next end of line + pBuf[pos++] = '\0'; + result = 0; + + // move past all end-of-line characters + while ((pBuf[pos] == '\r') || (pBuf[pos] == '\n')) + { + pos++; + } + break; + } + pos++; + } + + *pOffset = pos; + return result; +} + +// pLine in, ppPart1 out, ppPart2 out, ppPart3 out +// returns number of found parts +int SlideShow::splitLine(char* pLine, char** ppPart1, char** ppPart2, char** ppPart3) +{ + int pos = 0; + int found = 0; + + *ppPart1 = NULL; + *ppPart2 = NULL; + *ppPart3 = NULL; + + if (*pLine != '\0') + { + *ppPart1 = &(pLine[0]); + found++; + + while (pLine[pos] != '\0') + { + if (pLine[pos] == ' ') + { + // found the next token separator + pLine[pos++] = '\0'; + found++; + + // move past all token separator characters + while (pLine[pos] == ' ') + { + pos++; + } + + // start looking for end of next token + if (found == 2) + { + *ppPart2 = &(pLine[pos]); + } + else if (found == 3) + { + *ppPart3 = &(pLine[pos]); + } + } + pos++; + } + } + + return found; +} + +// returns index of pLabel or -1 if it doesn't exist +int SlideShow::findLabel(LabelInfo* pLabels, int numLabels, const char* pLabel) +{ + int i; + for (i = 0; i < numLabels; i++) + { + if (strcmp(pLabels[i].pLabel, pLabel) == 0) + { + return pLabels[i].index; + } + } + return -1; +} + +void SlideShow::freeSequence(void) +{ + if (allocatedSequenceItems > 0) { + for (int i = 0; i < usedSequenceItems; i++) { + delete Sequence[i]; + } + free(Sequence); + Sequence = NULL; + allocatedSequenceItems = 0; + usedSequenceItems = 0; + } +} + +SlideShow::SlideShowError SlideShow::expandSequence() +{ + int newSize = allocatedSequenceItems + 20; + Command** newPtr = (Command**)realloc(Sequence, newSize * sizeof(Command*)); + if (newPtr != NULL) { + Sequence = newPtr; + allocatedSequenceItems = newSize; + return Ok; + } else { + return OutOfMemory; + } +} + +SlideShow::SlideShowError SlideShow::parseScript(char* pBuf) +{ + char* pLine = NULL; + int offset = 0; + LabelInfo Labels[10] = {0}; + int numLabels = 0; + LabelInfo UnresolvedGotos[10] = {0}; + int numUnresolvedGotos = 0; + int i; + SlideShowError result; + + // cleanup old sequences + freeSequence(); + + // prepare the new one + result = expandSequence(); + if (result != Ok) { + return result; + } + + // start parsing the new sequence + while (getNextLine(pBuf, &offset, &pLine) == 0) + { + if (*pLine == '#') + { + // found a comment line + } + else + { + char* pCommand; + char* pArg1; + char* pArg2; + int num = splitLine(pLine, &pCommand, &pArg1, &pArg2); + + if ((num >= 1) && (num <= 3) && (strcmp(pCommand, "clear") == 0)) + { + if (num == 1) { + Sequence[usedSequenceItems] = new Command(Command::Clear, 0xff, new Transition("none")); + } else if (num == 2) { + Sequence[usedSequenceItems] = new Command(Command::Clear, strtol(pArg1, NULL, 16), new Transition("none")); + } else { + Transition* t = new Transition(pArg2); + if (t->type() == Transition::Unknown) { + printf("Found invalid transition '%s'. Aborting...\n", pArg2); + result = InvalidScript; + break; + } + Sequence[usedSequenceItems] = new Command(Command::Clear, strtol(pArg1, NULL, 16), t); + } + } + else if ((num == 3) && (strcmp(pCommand, "show") == 0)) + { + Transition* t = new Transition(pArg2); + if (t->type() == Transition::Unknown) { + printf("Found invalid transition '%s'. Aborting...\n", pArg2); + result = InvalidScript; + break; + } + Sequence[usedSequenceItems] = new Command(Command::Show, atoi(pArg1), t); + } + else if ((num == 2) && (strcmp(pCommand, "wait") == 0)) + { + Sequence[usedSequenceItems] = new Command(Command::Wait, atoi(pArg1)); + } + else if ((num == 2) && (strcmp(pCommand, "callout") == 0)) + { + Sequence[usedSequenceItems] = new Command(Command::Callout, atoi(pArg1)); + } + else if ((num == 2) && (strcmp(pCommand, "label") == 0)) + { + int index = findLabel(&(Labels[0]), numLabels, pArg1); + if (index == -1) + { + // found a new label + Labels[numLabels].index = usedSequenceItems; + Labels[numLabels].pLabel = pArg1; + numLabels++; + + // A label doesn't occupy a slot in the sequence + usedSequenceItems--; + } + else + { + // label already declared + printf("Found a second declaration of label '%s'. Aborting...\n", pArg1); + result = InvalidScript; + break; + } + } + else if ((num == 2) && (strcmp(pCommand, "goto") == 0)) + { + int index = findLabel(&(Labels[0]), numLabels, pArg1); + if (index == -1) + { + // couldn't find the label we are looking for so we + // wait for now + UnresolvedGotos[numUnresolvedGotos].index = usedSequenceItems; + UnresolvedGotos[numUnresolvedGotos].pLabel = pArg1; + numUnresolvedGotos++; + } + + // Create the command + Sequence[usedSequenceItems] = new Command(Command::Goto, index); + } + else if ((num == 3) && (strcmp(pCommand, "load") == 0)) + { + Sequence[usedSequenceItems] = new Command(Command::LoadImage, atoi(pArg2), NULL, pArg1, pathPrefix); + if (Sequence[usedSequenceItems]->info() >= MaxNumPreparedImages) { + printf("Attempting to load into invalid slot %d, have 0..%d. Aborting...\n", Sequence[usedSequenceItems]->info(), MaxNumPreparedImages); + result = InvalidScript; + break; + } + } + else + { + // unknown command + printf("Found unknown command '%s'. Aborting...\n", pCommand); + result = InvalidScript; + break; + } + + // start looking for next part in the sequence + usedSequenceItems++; + + // assure we don't pass memory limit + if (usedSequenceItems >= allocatedSequenceItems) + { + result = expandSequence(); + if (result != Ok) { + printf("Failed to allocate memory to hold sequence. Aborting...\n"); + break; + } + } + } + } + + // Resolve any unresolved gotos. Happens when the label is on + // a line with a higher line number than the goto statement. + for (i = 0; i < numUnresolvedGotos && result==Ok; i++) + { + int index = findLabel(&(Labels[0]), numLabels, UnresolvedGotos[i].pLabel); + if (index == -1) + { + printf("Unable to find label '%s' used in goto statement. Aborting...\n", UnresolvedGotos[i].pLabel); + result = InvalidScript; + } + else + { + // Update the goto element with the correct index of the label + Sequence[UnresolvedGotos[i].index]->updateInfo(index); + } + } + + if (result==Ok && usedSequenceItems == 0) + { + printf("Found no sequence. Aborting...\n"); + result = InvalidScript; + } + return result; +} + +SlideShow::SlideShowError SlideShow::loadImage(const char* pFileName, int slot) +{ + SlideShowError result = Ok; + + if (PreparedImages[slot].pointerToFree != NULL) { + free(PreparedImages[slot].pointerToFree); + PreparedImages[slot].pointerToFree = NULL; + } + + if (Image::decode(pFileName, Image::RES_16BIT, &(PreparedImages[slot]), fileMutex) != 0) { + printf("Failed to decode file %s as image\n", pFileName); + result = FileError; + } + + return result; +} +void SlideShow::delay(int lastTime, int millis) +{ + int timeToWait = (lastTime + millis) - msTicks; + if (timeToWait > 0) { + wait_ms(timeToWait); + } +} + +SlideShow::SlideShowError SlideShow::runScript() +{ + SlideShowError result = Ok; + int seqIndex = 0; + int lastTime = 0; + + while ((result == Ok) && (seqIndex < this->usedSequenceItems)) + { + result = Sequence[seqIndex]->handle(this, &seqIndex, &lastTime); + + if (abortBeforeNextStep) { + break; + } + } + +// if (*pAbort) +// { +// return SLIDE_USER_ABORT; +// } +// else +// { +// return SLIDE_SCRIPT_END; +// } + return Ok; +} + + +/****************************************************************************** + * Public Functions + *****************************************************************************/ + +SlideShow::SlideShow(Renderer* r, /*LcdController::Config* screen,*/ const char* pathPrefix, uint8_t* bkg, int xoff, int yoff, int layer, Mutex* fileMutex) +{ + Display* disp = DMBoard::instance().display(); + this->screenWidth = disp->width(); + this->screenHeight = disp->height(); + this->screenPixels = this->screenWidth * this->screenHeight; + this->drawXoff = xoff; + this->drawYoff = yoff; + + // Assume screen->bpp == Bpp_16 + this->screenBytes = 2 * this->screenPixels; + + this->ImageBackBuffer = NULL; + this->Sequence = NULL; + this->allocatedSequenceItems = 0; + this->usedSequenceItems = 0; + + this->pathPrefix = pathPrefix; + + this->CurrentSlot = NO_SLOT; + + memset(PreparedImages, 0, MaxNumPreparedImages * sizeof(Image::ImageData_t)); + + this->fileMutex = fileMutex; + + this->rend = r; + this->rendHnd = 0; + this->layer = layer; + + this->callout = NULL; + + this->abortBeforeNextStep = false; +} + +SlideShow::~SlideShow() +{ + if (ImageBackBuffer != NULL) { + free(ImageBackBuffer); + ImageBackBuffer = NULL; + } + for (int i = 0; i < MaxNumPreparedImages; i++) { + if (PreparedImages[i].pointerToFree != NULL) { + free(PreparedImages[i].pointerToFree); + } + } + + freeSequence(); + + if ((rendHnd != 0) && (rend != NULL)) { + rend->unregisterUser(rendHnd); + } + + //memset(PreparedImages, 0, MaxNumPreparedImages * sizeof(Image::ImageData_t)); +} + +SlideShow::SlideShowError SlideShow::prepare(const char* scriptFile) +{ + uint8_t* pBuf = NULL; + uint32_t size = 0; + SlideShowError result = InvalidScript; + + do + { + if (ImageBackBuffer == NULL) { + // Back buffer will be able to hold three images + ImageBackBuffer = (image_t)malloc(screenBytes * 3); + if (ImageBackBuffer == NULL) { + result = OutOfMemory; + break; + } + } + + // Read the contents of the file into a newly allocated buffer + result = loadFile(scriptFile, &pBuf, &size); + if (result != Ok) + { + break; + } + + //printf("Parsing buffer...\n"); + + // Parse buffer to create the script sequence + result = parseScript((char*)pBuf); + + } while (0); + + // Release resources + if (pBuf != NULL) + { + free(pBuf); + pBuf = NULL; + } + if (result != Ok) { + freeSequence(); + } + + return result; +} + +SlideShow::SlideShowError SlideShow::run() +{ + //printf("Executing script...\n"); + this->abortBeforeNextStep = false; + return runScript(); +} + +void SlideShow::setCalloutHandler(calloutFunc func, int calloutId) +{ + this->callout = func; + this->calloutId = calloutId; +} + +void SlideShow::releaseScreen(void) +{ + if ((rendHnd != 0) && (rend != NULL)) { + rend->unregisterUser(rendHnd); + } + rendHnd = 0; +}