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author | Hugues Ross <hugues.ross@gmail.com> | 2020-02-15 10:33:18 -0500 |
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committer | GitHub <noreply@github.com> | 2020-02-15 15:33:18 +0000 |
commit | 7ce21788f86d489d6dc08d9b2d3f6e3f8495b64e (patch) | |
tree | b3388dad101a3b6b4edee239a21bdc662071faca /src/gui/guiAnimatedImage.cpp | |
parent | ee7d35760242824fd6b00a6ab1d9a2e6e5873d2c (diff) | |
download | minetest-7ce21788f86d489d6dc08d9b2d3f6e3f8495b64e.tar.gz minetest-7ce21788f86d489d6dc08d9b2d3f6e3f8495b64e.tar.bz2 minetest-7ce21788f86d489d6dc08d9b2d3f6e3f8495b64e.zip |
Add animated_image[] formspec element (#9258)
Diffstat (limited to 'src/gui/guiAnimatedImage.cpp')
-rw-r--r-- | src/gui/guiAnimatedImage.cpp | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/src/gui/guiAnimatedImage.cpp b/src/gui/guiAnimatedImage.cpp new file mode 100644 index 000000000..822304087 --- /dev/null +++ b/src/gui/guiAnimatedImage.cpp @@ -0,0 +1,83 @@ +#include "guiAnimatedImage.h" + +#include "client/guiscalingfilter.h" +#include "client/tile.h" // ITextureSource +#include "log.h" +#include "porting.h" +#include <string> + +GUIAnimatedImage::GUIAnimatedImage(gui::IGUIEnvironment *env, gui::IGUIElement *parent, + s32 id, const core::rect<s32> &rectangle, const std::string &name, + ISimpleTextureSource *tsrc) : + gui::IGUIElement(gui::EGUIET_ELEMENT, env, parent, id, rectangle), + m_name(name), m_tsrc(tsrc), m_texture(nullptr), m_global_time(0), + m_frame_idx(0), m_frame_count(1), m_frame_duration(1), m_frame_time(0) +{ + // Expected format: "texture_name:frame_count,frame_duration" + // If this format is not met, the string will be loaded as a normal texture + + std::string::size_type colon_position = name.find(':', 0); + std::string::size_type comma_position = name.find(',', 0); + + if (comma_position != std::string::npos && + colon_position != std::string::npos && + comma_position < name.size()) { + m_texture = m_tsrc->getTexture(name.substr(0, colon_position)); + + m_frame_count = std::max(stoi(name.substr( + colon_position + 1, comma_position - colon_position - 1)), 1); + + m_frame_duration = std::max(stoi(name.substr(comma_position + 1)), 1); + } else { + // Leave the count/duration and display a static image + m_texture = m_tsrc->getTexture(name); + errorstream << "animated_image[]: Invalid texture format " << name << + ". Expected format: texture_name:frame_count,frame_duration" << std::endl; + } + + if (m_texture != nullptr) { + core::dimension2d<u32> size = m_texture->getOriginalSize(); + if (size.Height < (u64)m_frame_count) { + m_frame_count = size.Height; + } + } else { + // No need to step an animation if we have nothing to draw + m_frame_count = 1; + } +} + +void GUIAnimatedImage::draw() +{ + // Render the current frame + if (m_texture != nullptr) { + video::IVideoDriver *driver = Environment->getVideoDriver(); + + const video::SColor color(255, 255, 255, 255); + const video::SColor colors[] = {color, color, color, color}; + + core::dimension2d<u32> size = m_texture->getOriginalSize(); + size.Height /= m_frame_count; + + draw2DImageFilterScaled( driver, m_texture, AbsoluteRect, + core::rect<s32>(core::position2d<s32>(0, size.Height * m_frame_idx), size), + NoClip ? nullptr : &AbsoluteClippingRect, colors, true); + } + + // Step the animation + if (m_frame_count > 1) { + // Determine the delta time to step + u64 new_global_time = porting::getTimeMs(); + if (m_global_time > 0) + m_frame_time += new_global_time - m_global_time; + + m_global_time = new_global_time; + + // Advance by the number of elapsed frames, looping if necessary + m_frame_idx += u32(m_frame_time / m_frame_duration); + m_frame_idx %= m_frame_count; + + // If 1 or more frames have elapsed, reset the frame time counter with + // the remainder + m_frame_time %= m_frame_duration; + } +} |