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104 lines
2.9 KiB
104 lines
2.9 KiB
5 years ago
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#include "hwcursor.hpp"
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#include <cstdint>
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#include <tuple>
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#if SDL_VERSION_ATLEAST(2, 0, 0)
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#include <SDL_mouse.h>
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#include <SDL_render.h>
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#include <SDL_surface.h>
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#endif
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#include "DiabloUI/diabloui.h"
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#include "cursor.h"
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#include "engine.h"
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#include "utils/display.h"
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#include "utils/sdl_ptrs.h"
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namespace devilution {
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namespace {
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CursorInfo CurrentCursorInfo;
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#if SDL_VERSION_ATLEAST(2, 0, 0)
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SDLCursorUniquePtr CurrentCursor;
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void SetHardwareCursor(SDL_Surface *surface)
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{
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float scaleX;
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float scaleY;
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if (renderer != nullptr) {
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SDL_RenderGetScale(renderer, &scaleX, &scaleY);
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}
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SDLCursorUniquePtr newCursor;
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if (renderer == nullptr || (scaleX == 1.0F && scaleY == 1.0F)) {
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newCursor = SDLCursorUniquePtr { SDL_CreateColorCursor(surface, 0, 0) };
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} else {
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// SDL does not support BlitScaled from 8-bit to RGBA.
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SDLSurfaceUniquePtr converted { SDL_ConvertSurfaceFormat(surface, SDL_PIXELFORMAT_ARGB8888, 0) };
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const int scaledW = surface->w * scaleX; // NOLINT(bugprone-narrowing-conversions)
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const int scaledH = surface->h * scaleY; // NOLINT(bugprone-narrowing-conversions)
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SDLSurfaceUniquePtr scaledSurface { SDL_CreateRGBSurfaceWithFormat(0, scaledW, scaledH, 32, SDL_PIXELFORMAT_ARGB8888) };
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SDL_BlitScaled(converted.get(), nullptr, scaledSurface.get(), nullptr);
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newCursor = SDLCursorUniquePtr { SDL_CreateColorCursor(scaledSurface.get(), 0, 0) };
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}
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SDL_SetCursor(newCursor.get());
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CurrentCursor = std::move(newCursor);
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}
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void SetHardwareCursorFromSprite(int pcurs)
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{
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const int outlineWidth = IsItemSprite(pcurs) ? 1 : 0;
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int width;
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int height;
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std::tie(width, height) = GetInvItemSize(pcurs);
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width += 2 * outlineWidth;
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height += 2 * outlineWidth;
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auto out = CelOutputBuffer::Alloc(width, height);
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SDL_SetSurfacePalette(out.surface, palette);
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// Transparent color must not be used in the sprite itself.
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// Colors 1-127 are outside of the UI palette so are safe to use.
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constexpr std::uint8_t TransparentColor = 1;
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SDL_FillRect(out.surface, nullptr, TransparentColor);
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SDL_SetColorKey(out.surface, 1, TransparentColor);
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CelDrawCursor(out, { outlineWidth, height - outlineWidth }, pcurs);
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SetHardwareCursor(out.surface);
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out.Free();
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}
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#endif
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} // namespace
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CursorInfo GetCurrentCursorInfo()
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{
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return CurrentCursorInfo;
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}
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void SetHardwareCursor(CursorInfo cursorInfo)
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{
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#if SDL_VERSION_ATLEAST(2, 0, 0)
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CurrentCursorInfo = cursorInfo;
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switch (cursorInfo.type()) {
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case CursorType::Game:
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SetHardwareCursorFromSprite(cursorInfo.id());
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break;
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case CursorType::UserInterface:
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// ArtCursor is null while loading the game on the progress screen,
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// called via palette fade from ShowProgress.
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if (ArtCursor.surface != nullptr)
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SetHardwareCursor(ArtCursor.surface.get());
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break;
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case CursorType::Unknown:
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break;
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}
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#endif
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}
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} // namespace devilution
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