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Fix vertically-flipped 2D histograms

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marcizhu 2021-06-25 11:52:38 +02:00
parent 5f11a7875d
commit bef982f0b6
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GPG Key ID: 2D8FA5B173E88095
3 changed files with 10 additions and 11 deletions
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12
backends/implot_impl_opengl3.cpp
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@ -53,8 +53,8 @@ struct HeatmapData
HeatmapShader* ShaderProgram; ///< Shader to be used by this heatmap (either ShaderInt or ShaderFloat)
GLuint HeatmapTexID; ///< Texture ID of the heatmap 2D texture
GLuint ColormapTexID; ///< Texture ID of the colormap 1D texture
ImVec2 MinBounds; ///< Minimum bounds of the heatmap
ImVec2 MaxBounds; ///< Maximum bounds of the heatmap
ImPlotPoint MinBounds; ///< Minimum bounds of the heatmap
ImPlotPoint MaxBounds; ///< Maximum bounds of the heatmap
float MinValue; ///< Minimum value of the colormap
float MaxValue; ///< Maximum value of the colormap
bool AxisLogX; ///< Whether the X axis is logarithmic or not
@ -332,19 +332,19 @@ void SetHeatmapData(int itemID, const ImU64* values, int rows, int cols)
SetTextureData(itemID, Context.temp3.Data, rows, cols, GL_R32UI, GL_RED_INTEGER, GL_UNSIGNED_INT);
}
void SetAxisLog(int itemID, bool x_is_log, bool y_is_log, const ImVec2& bounds_min, const ImVec2& bounds_max)
void SetAxisLog(int itemID, bool x_is_log, bool y_is_log, const ImPlotPoint& bounds_min, const ImPlotPoint& bounds_max)
{
ContextData& Context = *((ContextData*)GImPlot->backendCtx);
int idx = Context.ItemIDs.GetInt(itemID, -1);
HeatmapData& data = Context.HeatmapDataList[idx];
data.AxisLogX = x_is_log;
data.AxisLogY =y_is_log;
data.AxisLogY = y_is_log;
data.MinBounds = bounds_min;
data.MaxBounds = bounds_max;
}
void RenderHeatmap(int itemID, ImDrawList& DrawList, const ImVec2& bounds_min, const ImVec2& bounds_max, float scale_min, float scale_max, ImPlotColormap colormap)
void RenderHeatmap(int itemID, ImDrawList& DrawList, const ImVec2& bounds_min, const ImVec2& bounds_max, float scale_min, float scale_max, ImPlotColormap colormap, bool reverse_y)
{
ContextData& Context = *((ContextData*)GImPlot->backendCtx);
int idx = Context.ItemIDs.GetInt(itemID, Context.HeatmapDataList.Size);
@ -367,7 +367,7 @@ void RenderHeatmap(int itemID, ImDrawList& DrawList, const ImVec2& bounds_min, c
DrawList.AddCallback(RenderCallback, (void*)(intptr_t)itemID);
DrawList.PrimReserve(6, 4);
DrawList.PrimRectUV(bounds_min, bounds_max, ImVec2(0.0f, 1.0f), ImVec2(1.0f, 0.0f), 0);
DrawList.PrimRectUV(bounds_min, bounds_max, ImVec2(0.0f, reverse_y ? 1.0f : 0.0f), ImVec2(1.0f, reverse_y ? 0.0f : 1.0f), 0);
DrawList.AddCallback(ResetState, nullptr);
}

4
backends/implot_impl_opengl3.h
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@ -188,7 +188,7 @@ IMPLOT_API void SetHeatmapData(int itemID, const ImU64* values, int rows, int c
*/
IMPLOT_API void RenderHeatmap(
int itemID, ImDrawList& DrawList, const ImVec2& bounds_min, const ImVec2& bounds_max,
float scale_min, float scale_max, ImPlotColormap colormap);
float scale_min, float scale_max, ImPlotColormap colormap, bool reverse_y);
/**
* @brief Set logarithmic axis
@ -202,7 +202,7 @@ IMPLOT_API void RenderHeatmap(
* @param bounds_min Minimum bounds (for X & Y) of the heatmap
* @param bounds_min Maximum bounds (for X & Y) of the heatmap
*/
void SetAxisLog(int itemID, bool x_is_log, bool y_is_log, const ImVec2& bounds_min, const ImVec2& bounds_max);
void SetAxisLog(int itemID, bool x_is_log, bool y_is_log, const ImPlotPoint& bounds_min, const ImPlotPoint& bounds_max);
}
}

5
implot_items.cpp
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@ -1895,15 +1895,14 @@ void RenderHeatmap(Transformer transformer, ImDrawList& DrawList, const T* value
#ifdef IMPLOT_BACKEND_HAS_HEATMAP
ImVec2 bmin = transformer(bounds_min);
ImVec2 bmax = transformer(bounds_max);
ImPlotScale scale = GetCurrentScale();
// NOTE: Order is important!
Backend::RenderHeatmap(gp.CurrentItem->ID, DrawList, bmin, bmax, scale_min, scale_max, gp.Style.Colormap);
Backend::RenderHeatmap(gp.CurrentItem->ID, DrawList, bmin, bmax, scale_min, scale_max, gp.Style.Colormap, reverse_y);
Backend::SetAxisLog(gp.CurrentItem->ID,
scale == ImPlotScale_LogLin || scale == ImPlotScale_LogLog,
scale == ImPlotScale_LinLog || scale == ImPlotScale_LogLog,
ImVec2(bounds_min.x, bounds_min.y), ImVec2(bounds_max.x, bounds_max.y));
bounds_min, bounds_max);
Backend::SetHeatmapData(gp.CurrentItem->ID, values, rows, cols);
#else
GetterHeatmap<T> getter(values, rows, cols, scale_min, scale_max, (bounds_max.x - bounds_min.x) / cols, (bounds_max.y - bounds_min.y) / rows, bounds_min.x, yref, ydir);