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[backends] make heatmap use ImPool, add ShowBackendMetrics, misc cleanup

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This commit is contained in:
Evan Pezent 2021-07-03 11:10:35 -07:00
parent 4371c2d200
commit aa1918ff16
3 changed files with 63 additions and 63 deletions
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2
backends/implot_backend.h
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@ -37,11 +37,13 @@ namespace Backend {
#ifdef IMPLOT_BACKEND_ENABLED
void* CreateContext();
void DestroyContext();
void ShowBackendMetrics();
void BustPlotCache();
void BustItemCache();
#else
inline void* CreateContext() { return nullptr; }
inline void DestroyContext() {}
inline void ShowBackendMetrics() {}
inline void BustPlotCache() {}
inline void BustItemCache() {}
#endif

116
backends/implot_impl_opengl3.cpp
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@ -37,7 +37,6 @@ namespace Backend {
struct HeatmapShader
{
GLuint ID = 0; ///< Shader ID for the heatmap shader
GLuint AttribLocationProjection = 0; ///< Attribute location for the projection matrix uniform
GLuint AttribLocationMinValue = 0; ///< Attribute location for the minimum value uniform
GLuint AttribLocationMaxValue = 0; ///< Attribute location for the maximum value uniform
@ -48,6 +47,7 @@ struct HeatmapShader
struct HeatmapData
{
ImGuiID ID;
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
@ -57,6 +57,14 @@ struct HeatmapData
float MaxValue; ///< Maximum value of the colormap
bool AxisLogX; ///< Whether the X axis is logarithmic or not
bool AxisLogY; ///< Whether the Y axis is logarithmic or not
HeatmapData() {
glGenTextures(1, &HeatmapTexID);
glBindTexture(GL_TEXTURE_2D, HeatmapTexID);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glBindTexture(GL_TEXTURE_2D, 0);
}
};
struct ContextData
@ -67,9 +75,8 @@ struct ContextData
GLuint AttribLocationImGuiProjection = 0; ///< Attribute location for the projection matrix uniform (ImGui default shader)
GLuint ImGuiShader = 0; ///< Shader ID of ImGui's default shader
ImVector<HeatmapData> HeatmapDataList; ///< Array of heatmap data
ImPool<HeatmapData> Heatmaps; ///< Array of heatmap data
ImVector<GLuint> ColormapIDs; ///< Texture IDs of the colormap textures
ImGuiStorage ItemIDs; ///< PlotID <-> Heatmap array index table
ImVector<float> temp1; ///< Temporary data
ImVector<ImS32> temp2; ///< Temporary data
@ -78,24 +85,21 @@ struct ContextData
void* CreateContext()
{
return new ContextData;
return IM_NEW(ContextData)();
}
void DestroyContext()
{
ContextData& Context = *((ContextData*)GImPlot->backendCtx);
for(const HeatmapData& data : Context.HeatmapDataList)
glDeleteTextures(1, &data.HeatmapTexID);
for(GLuint texID : Context.ColormapIDs)
ContextData* Context = ((ContextData*)GImPlot->backendCtx);
// free OpenGL resources
for(int i = 0; i < Context->Heatmaps.GetBufSize(); ++i)
glDeleteTextures(1, &Context->Heatmaps.GetByIndex(i)->HeatmapTexID);
for(GLuint texID : Context->ColormapIDs)
glDeleteTextures(1, &texID);
glDeleteProgram(Context.ShaderInt.ID);
glDeleteProgram(Context.ShaderFloat.ID);
Context.HeatmapDataList.clear();
Context.ItemIDs.Clear();
glDeleteProgram(Context->ShaderInt.ID);
glDeleteProgram(Context->ShaderFloat.ID);
Context->Heatmaps.Clear();
IM_DELETE(Context);
}
#define HEATMAP_VERTEX_SHADER_CODE \
@ -214,8 +218,7 @@ static void RenderCallback(const ImDrawList*, const ImDrawCmd* cmd)
ContextData& Context = *((ContextData*)GImPlot->backendCtx);
int itemID = (int)(intptr_t)cmd->UserCallbackData;
int plotIdx = Context.ItemIDs.GetInt(itemID, -1);
HeatmapData& data = Context.HeatmapDataList[plotIdx];
HeatmapData& data = *Context.Heatmaps.GetByKey(itemID);
// Get projection matrix of current shader
float OrthoProjection[4][4];
@ -239,7 +242,6 @@ static void ResetState(const ImDrawList*, const ImDrawCmd*)
{
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, 0);
ContextData& Context = *((ContextData*)GImPlot->backendCtx);
glUseProgram(Context.ImGuiShader);
}
@ -248,12 +250,10 @@ static void SetTextureData(int itemID, const void* data, GLsizei rows, GLsizei c
{
ContextData& Context = *((ContextData*)GImPlot->backendCtx);
int idx = Context.ItemIDs.GetInt(itemID, -1);
GLuint texID = Context.HeatmapDataList[idx].HeatmapTexID;
Context.HeatmapDataList[idx].ShaderProgram = (type == GL_FLOAT ? &Context.ShaderFloat : &Context.ShaderInt);
HeatmapData& hm = *Context.Heatmaps.GetByKey(itemID);
hm.ShaderProgram = (type == GL_FLOAT ? &Context.ShaderFloat : &Context.ShaderInt);
// Set heatmap data
glBindTexture(GL_TEXTURE_2D, texID);
glBindTexture(GL_TEXTURE_2D, hm.HeatmapTexID);
glTexImage2D(GL_TEXTURE_2D, 0, internalFormat, cols, rows, 0, format, type, data);
}
@ -273,18 +273,6 @@ void AddColormap(const ImU32* keys, int count, bool qual)
Context.ColormapIDs.push_back(textureID);
}
static GLuint CreateHeatmapTexture()
{
GLuint textureID;
glGenTextures(1, &textureID);
glBindTexture(GL_TEXTURE_2D, textureID);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glBindTexture(GL_TEXTURE_2D, 0);
return 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); }
@ -335,9 +323,7 @@ void SetHeatmapData(int itemID, const ImU64* values, int rows, int cols)
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];
HeatmapData& data = *Context.Heatmaps.GetByKey(itemID);
data.AxisLogX = x_is_log;
data.AxisLogY = y_is_log;
data.MinBounds = bounds_min;
@ -347,42 +333,48 @@ void SetAxisLog(int itemID, bool x_is_log, bool y_is_log, const ImPlotPoint& bou
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);
if(idx == Context.HeatmapDataList.Size)
{
// New entry
Context.ItemIDs.SetInt(itemID, Context.HeatmapDataList.Size);
Context.HeatmapDataList.push_back(HeatmapData());
Context.HeatmapDataList[idx].HeatmapTexID = CreateHeatmapTexture();
}
HeatmapData& data = Context.HeatmapDataList[idx];
HeatmapData& data = *Context.Heatmaps.GetOrAddByKey(itemID);
data.ID = itemID;
data.ColormapTexID = Context.ColormapIDs[colormap];
data.MinValue = scale_min;
data.MaxValue = scale_max;
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.AddCallback(ResetState, nullptr);
}
void BustPlotCache()
{
ContextData& Context = *((ContextData*)GImPlot->backendCtx);
for(const HeatmapData& data : Context.HeatmapDataList)
glDeleteTextures(1, &data.HeatmapTexID);
Context.HeatmapDataList.clear();
Context.ItemIDs.Clear();
void BustPlotCache() {
BustItemCache();
}
void BustItemCache() {}
void BustItemCache() {
ContextData* Context = ((ContextData*)GImPlot->backendCtx);
for(int i = 0; i < Context->Heatmaps.GetBufSize(); ++i)
glDeleteTextures(1, &Context->Heatmaps.GetByIndex(i)->HeatmapTexID);
Context->Heatmaps.Clear();
}
void ShowBackendMetrics() {
ContextData* Context = ((ContextData*)GImPlot->backendCtx);
// heatmaps
int n_heatmaps = Context->Heatmaps.GetBufSize();
if (ImGui::TreeNode("Heatmaps","Heatmaps (%d)",n_heatmaps)) {
for (int i = 0; i < n_heatmaps; ++i) {
HeatmapData& data = *Context->Heatmaps.GetByIndex(i);
ImGui::PushID(i);
if (ImGui::TreeNode("Item","Item [0x%08X]", data.ID)) {
ImGui::BulletText("HeatmapTexID: %u", data.HeatmapTexID);
ImGui::BulletText("ColormapTexID: %u", data.ColormapTexID);
ImGui::TreePop();
}
ImGui::PopID();
}
ImGui::TreePop();
}
}
} // namespace Backend
} // namespace ImPlot

6
implot.cpp
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@ -4067,6 +4067,12 @@ void ShowMetricsWindow(bool* p_popen) {
}
ImGui::TreePop();
}
#ifdef IMPLOT_BACKEND_ENABLED
if (ImGui::TreeNode("Backend")) {
ImPlot::Backend::ShowBackendMetrics();
ImGui::TreePop();
}
#endif
ImGui::End();
}