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Implement heatmap rendering in a single function (#263)

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Marc 2021-07-04 16:19:01 +02:00 committed by GitHub
parent 8f1655b975
commit 127a6d336a
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3 changed files with 44 additions and 44 deletions
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7
backends/implot_backend.h
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@ -66,8 +66,11 @@ namespace Backend {
void SetHeatmapData(int itemID, const double* values, int rows, int cols);
void SetHeatmapData(int itemID, const float* values, int rows, int cols);
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);
int itemID, const void* data, ImGuiDataType data_type, int rows, int cols,
float scale_min, float scale_max, const ImVec2& coords_min,
const ImVec2& coords_max, const ImPlotPoint& bounds_min,
const ImPlotPoint& bounds_max, /*ImPlotScale*/int scale, bool reverse_y,
ImPlotColormap cmap, ImDrawList& DrawList);
void SetAxisLog(int itemID, bool x_is_log, bool y_is_log, const ImPlotPoint& bounds_min, const ImPlotPoint& bounds_max);
#endif

69
backends/implot_impl_opengl3.cpp
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@ -246,14 +246,9 @@ static void ResetState(const ImDrawList*, const ImDrawCmd*)
glUseProgram(Context.ImGuiShader);
}
static void SetTextureData(int itemID, const void* data, GLsizei rows, GLsizei cols, GLint internalFormat, GLenum format, GLenum type)
static void SetTextureData(GLuint textureID, const void* data, GLsizei rows, GLsizei cols, GLint internalFormat, GLenum format, GLenum type)
{
ContextData& Context = *((ContextData*)GImPlot->backendCtx);
HeatmapData& hm = *Context.Heatmaps.GetByKey(itemID);
hm.ShaderProgram = (type == GL_FLOAT ? &Context.ShaderFloat : &Context.ShaderInt);
glBindTexture(GL_TEXTURE_2D, hm.HeatmapTexID);
glBindTexture(GL_TEXTURE_2D, textureID);
glTexImage2D(GL_TEXTURE_2D, 0, internalFormat, cols, rows, 0, format, type, data);
}
@ -273,15 +268,7 @@ void AddColormap(const ImU32* keys, int count, bool qual)
Context.ColormapIDs.push_back(textureID);
}
void SetHeatmapData(int itemID, const ImS8* values, int rows, int cols) { SetTextureData(itemID, values, rows, cols, GL_R8I, GL_RED_INTEGER, GL_BYTE); }
void SetHeatmapData(int itemID, const ImU8* values, int rows, int cols) { SetTextureData(itemID, values, rows, cols, GL_R8UI, GL_RED_INTEGER, GL_UNSIGNED_BYTE); }
void SetHeatmapData(int itemID, const ImS16* values, int rows, int cols) { SetTextureData(itemID, values, rows, cols, GL_R16I, GL_RED_INTEGER, GL_SHORT); }
void SetHeatmapData(int itemID, const ImU16* values, int rows, int cols) { SetTextureData(itemID, values, rows, cols, GL_R16UI, GL_RED_INTEGER, GL_UNSIGNED_SHORT); }
void SetHeatmapData(int itemID, const ImS32* values, int rows, int cols) { SetTextureData(itemID, values, rows, cols, GL_R32I, GL_RED_INTEGER, GL_INT); }
void SetHeatmapData(int itemID, const ImU32* values, int rows, int cols) { SetTextureData(itemID, values, rows, cols, GL_R32UI, GL_RED_INTEGER, GL_UNSIGNED_INT); }
void SetHeatmapData(int itemID, const float* values, int rows, int cols) { SetTextureData(itemID, values, rows, cols, GL_R32F, GL_RED, GL_FLOAT); }
void SetHeatmapData(int itemID, const double* values, int rows, int cols)
void SetHeatmapData(GLuint textureID, const double* values, int rows, int cols)
{
ContextData& Context = *((ContextData*)GImPlot->backendCtx);
@ -291,10 +278,10 @@ void SetHeatmapData(int itemID, const double* values, int rows, int cols)
for(int i = 0; i < rows*cols; i++)
Context.temp1[i] = (float)values[i];
SetTextureData(itemID, Context.temp1.Data, rows, cols, GL_R32F, GL_RED, GL_FLOAT);
SetTextureData(textureID, Context.temp1.Data, rows, cols, GL_R32F, GL_RED, GL_FLOAT);
}
void SetHeatmapData(int itemID, const ImS64* values, int rows, int cols)
void SetHeatmapData(GLuint textureID, const ImS64* values, int rows, int cols)
{
ContextData& Context = *((ContextData*)GImPlot->backendCtx);
@ -304,10 +291,10 @@ void SetHeatmapData(int itemID, const ImS64* values, int rows, int cols)
for(int i = 0; i < rows*cols; i++)
Context.temp2[i] = (ImS32)values[i];
SetTextureData(itemID, Context.temp2.Data, rows, cols, GL_R32I, GL_RED_INTEGER, GL_INT);
SetTextureData(textureID, Context.temp2.Data, rows, cols, GL_R32I, GL_RED_INTEGER, GL_INT);
}
void SetHeatmapData(int itemID, const ImU64* values, int rows, int cols)
void SetHeatmapData(GLuint textureID, const ImU64* values, int rows, int cols)
{
ContextData& Context = *((ContextData*)GImPlot->backendCtx);
@ -317,32 +304,46 @@ void SetHeatmapData(int itemID, const ImU64* values, int rows, int cols)
for(int i = 0; i < rows*cols; i++)
Context.temp3[i] = (ImU32)values[i];
SetTextureData(itemID, Context.temp3.Data, rows, cols, GL_R32UI, GL_RED_INTEGER, GL_UNSIGNED_INT);
SetTextureData(textureID, 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 ImPlotPoint& bounds_min, const ImPlotPoint& bounds_max)
{
ContextData& Context = *((ContextData*)GImPlot->backendCtx);
HeatmapData& data = *Context.Heatmaps.GetByKey(itemID);
data.AxisLogX = x_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, bool reverse_y)
void RenderHeatmap(
int itemID, const void* values, ImGuiDataType data_type, int rows, int cols, float scale_min, float scale_max,
const ImVec2& coords_min, const ImVec2& coords_max, const ImPlotPoint& bounds_min, const ImPlotPoint& bounds_max,
ImPlotScale scale, bool reverse_y, ImPlotColormap cmap, ImDrawList& DrawList)
{
ContextData& Context = *((ContextData*)GImPlot->backendCtx);
HeatmapData& data = *Context.Heatmaps.GetOrAddByKey(itemID);
data.ID = itemID;
data.ColormapTexID = Context.ColormapIDs[colormap];
data.ColormapTexID = Context.ColormapIDs[cmap];
data.MinValue = scale_min;
data.MaxValue = scale_max;
data.AxisLogX = scale == ImPlotScale_LogLin || scale == ImPlotScale_LogLog;
data.AxisLogY = scale == ImPlotScale_LinLog || scale == ImPlotScale_LogLog;
data.MinBounds = bounds_min;
data.MaxBounds = bounds_max;
data.ShaderProgram = (data_type == ImGuiDataType_Float || data_type == ImGuiDataType_Double ? &Context.ShaderFloat : &Context.ShaderInt);
switch(data_type)
{
case ImGuiDataType_S8: SetTextureData(data.HeatmapTexID, (const ImS8*) values, rows, cols, GL_R8I, GL_RED_INTEGER, GL_BYTE ); break;
case ImGuiDataType_U8: SetTextureData(data.HeatmapTexID, (const ImU8*) values, rows, cols, GL_R8UI, GL_RED_INTEGER, GL_UNSIGNED_BYTE ); break;
case ImGuiDataType_S16: SetTextureData(data.HeatmapTexID, (const ImS16*)values, rows, cols, GL_R16I, GL_RED_INTEGER, GL_SHORT ); break;
case ImGuiDataType_U16: SetTextureData(data.HeatmapTexID, (const ImU16*)values, rows, cols, GL_R16UI, GL_RED_INTEGER, GL_UNSIGNED_SHORT); break;
case ImGuiDataType_S32: SetTextureData(data.HeatmapTexID, (const ImS32*)values, rows, cols, GL_R32I, GL_RED_INTEGER, GL_INT ); break;
case ImGuiDataType_U32: SetTextureData(data.HeatmapTexID, (const ImU32*)values, rows, cols, GL_R32UI, GL_RED_INTEGER, GL_UNSIGNED_INT ); break;
case ImGuiDataType_S64: SetHeatmapData(data.HeatmapTexID, (const ImS64*)values, rows, cols); break;
case ImGuiDataType_U64: SetHeatmapData(data.HeatmapTexID, (const ImU64*)values, rows, cols); break;
case ImGuiDataType_Float: SetTextureData(data.HeatmapTexID, (const float*)values, rows, cols, GL_R32F, GL_RED, GL_FLOAT); break;
case ImGuiDataType_Double: SetHeatmapData(data.HeatmapTexID, (double*)values, rows, cols); break;
};
if(Context.ShaderInt.ID == 0 || Context.ShaderFloat.ID == 0)
DrawList.AddCallback(CreateHeatmapShader, nullptr);
DrawList.AddCallback(RenderCallback, (void*)(intptr_t)itemID);
DrawList.PrimReserve(6, 4);
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.PrimRectUV(coords_min, coords_max, ImVec2(0.0f, reverse_y ? 1.0f : 0.0f), ImVec2(1.0f, reverse_y ? 0.0f : 1.0f), 0);
DrawList.AddCallback(ResetState, nullptr);
}

12
implot_items.cpp
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@ -1910,15 +1910,11 @@ void RenderHeatmap(Transformer transformer, ImDrawList& DrawList, const T* value
if (GImPlot->Style.UseGpuAacceleration) {
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, (float)scale_min, (float)scale_max, gp.Style.Colormap, reverse_y);
Backend::SetAxisLog(gp.CurrentItem->ID,
scale == ImPlotScale_LogLin || scale == ImPlotScale_LogLog,
scale == ImPlotScale_LinLog || scale == ImPlotScale_LogLog,
bounds_min, bounds_max);
Backend::SetHeatmapData(gp.CurrentItem->ID, values, rows, cols);
Backend::RenderHeatmap(
gp.CurrentItem->ID, values, ImGuiDataTypeGetter<T>::Value, rows, cols,
(float)scale_min, (float)scale_max, bmin, bmax, bounds_min, bounds_max,
GetCurrentScale(), reverse_y, gp.Style.Colormap, DrawList);
}
else
#endif