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@ -3,6 +3,8 @@
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* |
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* Implementation of scrolling dialog text. |
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*/ |
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#include <string> |
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#include <vector> |
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#include "control.h" |
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#include "dx.h" |
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@ -12,6 +14,7 @@
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#include "textdat.h" |
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#include "utils/language.h" |
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#include "utils/stdcompat/optional.hpp" |
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#include "utils/stdcompat/string_view.hpp" |
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namespace devilution { |
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@ -20,77 +23,36 @@ bool qtextflag;
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namespace { |
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/** Current y position of text in px */ |
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int qtexty; |
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/** Pointer to the current text being displayed */ |
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const char *qtextptr; |
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/** Vertical speed of the scrolling text in ms/px */ |
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int qtextSpd; |
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/** Time of last rendering of the text */ |
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Uint32 sgLastScroll; |
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/** Start time of scrolling */ |
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Uint32 ScrollStart; |
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/** Graphics for the window border */ |
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std::optional<CelSprite> pTextBoxCels; |
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/** Pixels for a line of text and the empty space under it. */ |
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const int lineHeight = 38; |
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const int LineHeight = 38; |
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/**
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* @brief Build a single line of text from the given text stream |
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* @param text The original text |
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* @param line The buffer to insert the line in to |
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* @return Indicate that the end of the text was reached |
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*/ |
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bool BuildLine(const char *text, char line[128]) |
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std::vector<std::string> TextLines; |
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void LoadText(const char *text) |
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{ |
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int lineWidth = 0; |
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int l = 0; |
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while (*text != '\n' && *text != '|' && lineWidth < 543) { |
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uint8_t c = gbFontTransTbl[(uint8_t)*text]; |
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text++; |
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if (c != '\0') { |
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line[l] = c; |
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lineWidth += fontkern[GameFontMed][fontframe[GameFontMed][c]] + 2; |
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} else { |
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l--; |
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} |
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l++; |
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} |
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line[l] = '\0'; |
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if (*text == '|') { |
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line[l] = '\0'; |
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return true; |
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} |
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TextLines.clear(); |
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if (*text != '\n') { |
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while (line[l] != ' ' && l > 0) { |
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line[l] = '\0'; |
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l--; |
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} |
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} |
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char tempstr[1536]; // Longest test is about 768 chars * 2 for unicode
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strcpy(tempstr, text); |
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return false; |
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} |
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WordWrapGameString(tempstr, 543, GameFontMed, 2); |
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const string_view paragraphs = tempstr; |
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/**
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* @brief Calculate the number of line required by the given text |
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* @return Number of lines |
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*/ |
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int GetLinesInText(const char *text) |
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{ |
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char line[128]; |
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int lines = 0; |
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bool doneflag = false; |
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while (!doneflag) { |
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doneflag = BuildLine(text, line); |
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text += strlen(line); |
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if (*text == '\n') |
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text++; |
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lines++; |
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size_t previous = 0; |
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while (true) { |
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size_t next = paragraphs.find("\n", previous); |
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TextLines.emplace_back(paragraphs.substr(previous, next)); |
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if (next == std::string::npos) |
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break; |
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previous = next + 1; |
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} |
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return lines; |
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} |
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/**
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@ -98,99 +60,62 @@ int GetLinesInText(const char *text)
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* @param nSFX The index of the sound in the sgSFX table |
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* @return ms/px |
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*/ |
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int CalcTextSpeed(int nSFX) |
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int CalculateTextSpeed(int nSFX) |
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{ |
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int TextHeight; |
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Uint32 SfxFrames; |
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const int numLines = GetLinesInText(qtextptr); |
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const int numLines = TextLines.size(); |
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#ifndef NOSOUND |
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SfxFrames = GetSFXLength(nSFX); |
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Uint32 SfxFrames = GetSFXLength(nSFX); |
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assert(SfxFrames != 0); |
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#else |
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// Sound is disabled -- estimate length from the number of lines.
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SfxFrames = numLines * 3000; |
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Uint32 SfxFrames = numLines * 3000; |
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#endif |
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TextHeight = lineHeight * numLines; |
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TextHeight += lineHeight * 5; // adjust so when speaker is done two line are left
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int textHeight = LineHeight * numLines; |
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textHeight += LineHeight * 5; // adjust so when speaker is done two line are left
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return SfxFrames / TextHeight; |
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return SfxFrames / textHeight; |
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} |
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/**
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* @brief Print a character |
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* @param sx Back buffer coordinate |
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* @param sy Back buffer coordinate |
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* @param cel CEL sprite |
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* @param nCel CEL frame number |
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*/ |
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void PrintQTextChr(int sx, int sy, const CelSprite &cel, int nCel) |
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int CalculateTextPosition() |
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{ |
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const int start_y = 49 + UI_OFFSET_Y; |
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const CelOutputBuffer &buf = GlobalBackBuffer().subregionY(start_y, 260); |
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CelDrawTo(buf, sx, sy - start_y, cel, nCel); |
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} |
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Uint32 currTime = SDL_GetTicks(); |
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/**
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* @brief Draw the current text in the quest dialog window |
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* @return the start of the text currently being rendered |
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*/ |
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void ScrollQTextContent(const char *pnl) |
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{ |
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for (Uint32 currTime = SDL_GetTicks(); sgLastScroll + qtextSpd < currTime; sgLastScroll += qtextSpd) { |
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qtexty--; |
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if (qtexty <= 49 + UI_OFFSET_Y) { |
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qtexty += 38; |
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qtextptr = pnl; |
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if (*pnl == '|') { |
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qtextflag = false; |
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} |
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break; |
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} |
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} |
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int y = (currTime - ScrollStart) / qtextSpd - 260; |
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int textHeight = LineHeight * TextLines.size(); |
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if (y >= textHeight) |
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qtextflag = false; |
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return y; |
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} |
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/**
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* @brief Draw the current text in the quest dialog window |
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*/ |
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static void DrawQTextContent() |
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void DrawQTextContent(const CelOutputBuffer &out) |
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{ |
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// TODO: Draw to the given `out` buffer.
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const char *text, *pnl; |
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char line[128]; |
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text = qtextptr; |
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pnl = nullptr; |
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int tx = 48 + PANEL_X; |
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int ty = qtexty; |
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bool doneflag = false; |
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while (!doneflag) { |
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doneflag = BuildLine(text, line); |
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for (int i = 0; line[i]; i++) { |
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text++; |
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uint8_t c = fontframe[GameFontMed][gbFontTransTbl[(uint8_t)line[i]]]; |
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if (*text == '\n') { |
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text++; |
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} |
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if (c != 0) { |
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PrintQTextChr(tx, ty, *pMedTextCels, c); |
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} |
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tx += fontkern[GameFontMed][c] + 2; |
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} |
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if (pnl == nullptr) { |
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pnl = text; |
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int y = CalculateTextPosition(); |
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const int sx = PANEL_X + 48; |
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const int sy = LineHeight / 2 - (y % LineHeight); |
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const unsigned int skipLines = y / LineHeight; |
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for (int i = 0; i < 8; i++) { |
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const int lineNumber = skipLines + i; |
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if (lineNumber < 0 || lineNumber >= (int)TextLines.size()) { |
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continue; |
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} |
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tx = 48 + PANEL_X; |
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ty += lineHeight; |
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if (ty > 341 + UI_OFFSET_Y) { |
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doneflag = true; |
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const char *line = TextLines[lineNumber].c_str(); |
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if (line[0] == '\0') { |
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continue; |
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} |
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} |
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ScrollQTextContent(pnl); |
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DrawString(out, line, { sx, sy + i * LineHeight, 543, LineHeight }, UIS_MED, 2); |
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} |
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} |
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} // namespace
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@ -220,11 +145,10 @@ void InitQTextMsg(_speech_id m)
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{ |
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if (alltext[m].scrlltxt) { |
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questlog = false; |
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qtextptr = _(alltext[m].txtstr); |
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LoadText(_(alltext[m].txtstr)); |
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qtextflag = true; |
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qtexty = 340 + UI_OFFSET_Y; |
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qtextSpd = CalcTextSpeed(alltext[m].sfxnr); |
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sgLastScroll = SDL_GetTicks(); |
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qtextSpd = CalculateTextSpeed(alltext[m].sfxnr); |
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ScrollStart = SDL_GetTicks(); |
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} |
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PlaySFX(alltext[m].sfxnr); |
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} |
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@ -238,7 +162,7 @@ void DrawQTextBack(const CelOutputBuffer &out)
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void DrawQText(const CelOutputBuffer &out) |
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{ |
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DrawQTextBack(out); |
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DrawQTextContent(); |
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DrawQTextContent(out.subregionY(UI_OFFSET_Y + 49, 260)); |
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} |
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} // namespace devilution
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Anders Jenbo
5 years ago