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https://github.com/gwm17/implot.git
synced 2024-11-22 18:28:53 -05:00
Fix integer heatmaps not working properly
This commit is contained in:
marcizhu
parent
718351c6f5
commit
50407e5279
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@ -35,8 +35,20 @@ using namespace gl;
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namespace ImPlot {
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namespace Backend {
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struct Shader
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{
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GLuint ID = 0; ///< Shader ID for the heatmap shader
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GLuint g_AttribLocationHeatmapSampler = 0; ///< Attribute location for the heatmap texture
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GLuint g_AttribLocationColormapSampler = 0; ///< Attribute location for the colormap texture
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GLuint g_AttribLocationProjection = 0; ///< Attribute location for the projection matrix uniform
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GLuint g_AttribLocationMinValue = 0; ///< Attribute location for the minimum value uniform
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GLuint g_AttribLocationMaxValue = 0; ///< Attribute location for the maximum value uniform
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};
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struct HeatmapData
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{
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Shader* ShaderProgram;
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GLuint HeatmapTexID;
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GLuint ColormapTexID;
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float MinValue;
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@ -45,12 +57,8 @@ struct HeatmapData
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struct ContextData
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{
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GLuint g_ShaderProgram = 0; ///< Shader ID for the heatmap shader
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GLuint g_AttribLocationHeatmapSampler = 0; ///< Attribute location for the heatmap texture
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GLuint g_AttribLocationColormapSampler = 0; ///< Attribute location for the colormap texture
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GLuint g_AttribLocationProjection = 0; ///< Attribute location for the projection matrix uniform
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GLuint g_AttribLocationMinValue = 0; ///< Attribute location for the minimum value uniform
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GLuint g_AttribLocationMaxValue = 0; ///< Attribute location for the maximum value uniform
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Shader ShaderInt; ///< Shader for integer heatmaps
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Shader ShaderFloat; ///< Shader for floating-point heatmaps
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GLuint g_AttribLocationImGuiProjection = 0; ///< Attribute location for the projection matrix uniform (ImGui default shader)
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@ -78,10 +86,78 @@ void DestroyContext()
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for(GLuint texID : Context.ColormapIDs)
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glDeleteTextures(1, &texID);
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glDeleteProgram(Context.ShaderInt.ID);
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glDeleteProgram(Context.ShaderFloat.ID);
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Context.HeatmapDataList.clear();
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Context.PlotIDs.Clear();
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}
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#define VERTEX_SHADER_CODE \
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"#version 330 core\n" \
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"precision mediump float;\n" \
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"layout (location = %d) in vec2 Position;\n" \
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"layout (location = %d) in vec2 UV;\n" \
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"\n" \
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"uniform mat4 ProjMtx;\n" \
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"out vec2 Frag_UV;\n" \
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"\n" \
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"void main()\n" \
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"{\n" \
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" Frag_UV = UV;\n" \
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" gl_Position = ProjMtx * vec4(Position.xy, 0.0f, 1.0f);\n" \
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"}\n"
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#define FRAGMENT_SHADER_CODE \
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"#version 330 core\n" \
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"precision mediump float;\n" \
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"\n" \
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"in vec2 Frag_UV;\n" \
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"out vec4 Out_Color;\n" \
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"\n" \
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"uniform sampler1D colormap;\n" \
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"uniform %csampler2D heatmap;\n" \
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"uniform float min_val;\n" \
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"uniform float max_val;\n" \
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"\n" \
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"void main()\n" \
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"{\n" \
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" float value = float(texture(heatmap, Frag_UV).r);\n" \
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" float offset = (value - min_val) / (max_val - min_val);\n" \
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" Out_Color = texture(colormap, clamp(offset, 0.0f, 1.0f));\n" \
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"}\n"
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static void CompileShader(Shader& ShaderProgram, GLchar* VertexShaderCode, GLchar* FragmentShaderCode)
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{
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GLuint g_VertexShader = glCreateShader(GL_VERTEX_SHADER);
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glShaderSource(g_VertexShader, 1, &VertexShaderCode, nullptr);
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glCompileShader(g_VertexShader);
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GLuint g_FragmentShader = glCreateShader(GL_FRAGMENT_SHADER);
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glShaderSource(g_FragmentShader, 1, &FragmentShaderCode, nullptr);
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glCompileShader(g_FragmentShader);
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ShaderProgram.ID = glCreateProgram();
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glAttachShader(ShaderProgram.ID, g_VertexShader);
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glAttachShader(ShaderProgram.ID, g_FragmentShader);
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glLinkProgram(ShaderProgram.ID);
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glDetachShader(ShaderProgram.ID, g_VertexShader);
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glDetachShader(ShaderProgram.ID, g_FragmentShader);
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glDeleteShader(g_VertexShader);
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glDeleteShader(g_FragmentShader);
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ShaderProgram.g_AttribLocationHeatmapSampler = glGetUniformLocation(ShaderProgram.ID, "heatmap");
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ShaderProgram.g_AttribLocationColormapSampler = glGetUniformLocation(ShaderProgram.ID, "colormap");
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ShaderProgram.g_AttribLocationProjection = glGetUniformLocation(ShaderProgram.ID, "ProjMtx");
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ShaderProgram.g_AttribLocationMinValue = glGetUniformLocation(ShaderProgram.ID, "min_val");
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ShaderProgram.g_AttribLocationMaxValue = glGetUniformLocation(ShaderProgram.ID, "max_val");
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glUseProgram(ShaderProgram.ID);
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glUniform1i(ShaderProgram.g_AttribLocationHeatmapSampler, 0); // Set texture slot of heatmap texture
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glUniform1i(ShaderProgram.g_AttribLocationColormapSampler, 1); // Set texture slot of colormap texture
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}
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static void CreateShader(const ImDrawList*, const ImDrawCmd*)
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{
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ContextData& Context = *((ContextData*)GImPlot->backendCtx);
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@ -91,74 +167,25 @@ static void CreateShader(const ImDrawList*, const ImDrawCmd*)
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Context.g_AttribLocationImGuiProjection = glGetUniformLocation(CurrentShader, "ProjMtx");
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GLuint g_AttribLocationVtxPos = (GLuint)glGetAttribLocation(CurrentShader, "Position");
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GLuint g_AttribLocationVtxUV = (GLuint)glGetAttribLocation(CurrentShader, "UV");
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const GLchar* VertexShaderCode_t =
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"#version 330 core\n"
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"precision mediump float;\n"
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"layout (location = %d) in vec2 Position;\n"
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"layout (location = %d) in vec2 UV;\n"
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"\n"
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"uniform mat4 ProjMtx;\n"
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"out vec2 Frag_UV;\n"
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"\n"
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"void main()\n"
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"{\n"
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" Frag_UV = UV;\n"
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" gl_Position = ProjMtx * vec4(Position.xy, 0.0f, 1.0f);\n"
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"}\n";
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const GLchar* FragmentShaderCode =
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"#version 330 core\n"
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"precision mediump float;\n"
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"\n"
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"in vec2 Frag_UV;\n"
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"out vec4 Out_Color;\n"
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"\n"
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"uniform sampler1D colormap;\n"
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"uniform sampler2D heatmap;\n"
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"uniform float min_val;\n"
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"uniform float max_val;\n"
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"\n"
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"void main()\n"
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"{\n"
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" float offset = (texture(heatmap, Frag_UV).r - min_val) / (max_val - min_val);\n"
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" Out_Color = texture(colormap, clamp(offset, 0.0f, 1.0f));\n"
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"}\n";
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GLuint g_AttribLocationVtxPos = (GLuint)glGetAttribLocation(CurrentShader, "Position");
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GLuint g_AttribLocationVtxUV = (GLuint)glGetAttribLocation(CurrentShader, "UV");
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GLchar* VertexShaderCode = new GLchar[512];
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snprintf(VertexShaderCode, 512, VertexShaderCode_t, g_AttribLocationVtxPos, g_AttribLocationVtxUV);
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GLchar* FragmentShaderCode = new GLchar[512];
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GLuint g_VertexShader = glCreateShader(GL_VERTEX_SHADER);
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glShaderSource(g_VertexShader, 1, &VertexShaderCode, nullptr);
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glCompileShader(g_VertexShader);
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snprintf(VertexShaderCode, 512, VERTEX_SHADER_CODE, g_AttribLocationVtxPos, g_AttribLocationVtxUV);
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snprintf(FragmentShaderCode, 512, FRAGMENT_SHADER_CODE, ' ');
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GLuint g_FragmentShader = glCreateShader(GL_FRAGMENT_SHADER);
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glShaderSource(g_FragmentShader, 1, &FragmentShaderCode, nullptr);
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glCompileShader(g_FragmentShader);
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CompileShader(Context.ShaderFloat, VertexShaderCode, FragmentShaderCode);
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Context.g_ShaderProgram = glCreateProgram();
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glAttachShader(Context.g_ShaderProgram, g_VertexShader);
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glAttachShader(Context.g_ShaderProgram, g_FragmentShader);
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glLinkProgram(Context.g_ShaderProgram);
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snprintf(VertexShaderCode, 512, VERTEX_SHADER_CODE, g_AttribLocationVtxPos, g_AttribLocationVtxUV);
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snprintf(FragmentShaderCode, 512, FRAGMENT_SHADER_CODE, 'i');
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glDetachShader(Context.g_ShaderProgram, g_VertexShader);
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glDetachShader(Context.g_ShaderProgram, g_FragmentShader);
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glDeleteShader(g_VertexShader);
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glDeleteShader(g_FragmentShader);
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Context.g_AttribLocationHeatmapSampler = glGetUniformLocation(Context.g_ShaderProgram, "heatmap");
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Context.g_AttribLocationColormapSampler = glGetUniformLocation(Context.g_ShaderProgram, "colormap");
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Context.g_AttribLocationProjection = glGetUniformLocation(Context.g_ShaderProgram, "ProjMtx");
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Context.g_AttribLocationMinValue = glGetUniformLocation(Context.g_ShaderProgram, "min_val");
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Context.g_AttribLocationMaxValue = glGetUniformLocation(Context.g_ShaderProgram, "max_val");
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glUseProgram(Context.g_ShaderProgram);
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glUniform1i(Context.g_AttribLocationHeatmapSampler, 0); // Set texture slot of heatmap texture
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glUniform1i(Context.g_AttribLocationColormapSampler, 1); // Set texture slot of colormap texture
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CompileShader(Context.ShaderInt, VertexShaderCode, FragmentShaderCode);
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glUseProgram(0);
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delete[] VertexShaderCode;
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delete[] FragmentShaderCode;
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}
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static void RenderCallback(const ImDrawList*, const ImDrawCmd* cmd)
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@ -177,14 +204,14 @@ static void RenderCallback(const ImDrawList*, const ImDrawCmd* cmd)
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glGetUniformfv(CurrentShader, Context.g_AttribLocationImGuiProjection, &OrthoProjection[0][0]);
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// Enable our shader
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glUseProgram(Context.g_ShaderProgram);
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glUseProgram(data.ShaderProgram->ID);
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glActiveTexture(GL_TEXTURE0); glBindTexture(GL_TEXTURE_2D, data.HeatmapTexID); // Set texture ID of data
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glActiveTexture(GL_TEXTURE1); glBindTexture(GL_TEXTURE_1D, data.ColormapTexID); // Set texture ID of colormap
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glUniformMatrix4fv(Context.g_AttribLocationProjection, 1, GL_FALSE, &OrthoProjection[0][0]);
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glUniform1f(Context.g_AttribLocationMinValue, data.MinValue); // Set minimum range
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glUniform1f(Context.g_AttribLocationMaxValue, data.MaxValue); // Set maximum range
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glUniformMatrix4fv(data.ShaderProgram->g_AttribLocationProjection, 1, GL_FALSE, &OrthoProjection[0][0]);
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glUniform1f(data.ShaderProgram->g_AttribLocationMinValue, data.MinValue); // Set minimum range
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glUniform1f(data.ShaderProgram->g_AttribLocationMaxValue, data.MaxValue); // Set maximum range
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}
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static void UnbindTexture(const ImDrawList*, const ImDrawCmd*)
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@ -193,16 +220,17 @@ static void UnbindTexture(const ImDrawList*, const ImDrawCmd*)
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glBindTexture(GL_TEXTURE_2D, 0);
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}
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static void SetTextureData(int plotID, const void* data, GLsizei rows, GLsizei cols, GLenum type)
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static void SetTextureData(int plotID, const void* data, GLsizei rows, GLsizei cols, GLint internalFormat, GLenum format, GLenum type)
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{
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ContextData& Context = *((ContextData*)GImPlot->backendCtx);
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int idx = Context.PlotIDs.GetInt(plotID, -1);
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GLuint texID = Context.HeatmapDataList[idx].HeatmapTexID;
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Context.HeatmapDataList[idx].ShaderProgram = (type == GL_FLOAT ? &Context.ShaderFloat : &Context.ShaderInt);
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// Set heatmap data
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glBindTexture(GL_TEXTURE_2D, texID);
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glTexImage2D(GL_TEXTURE_2D, 0, GL_R32F, cols, rows, 0, GL_RED, type, data);
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glTexImage2D(GL_TEXTURE_2D, 0, internalFormat, cols, rows, 0, format, type, data);
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}
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void AddColormap(const ImU32* keys, int count, bool qual)
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@ -233,13 +261,13 @@ static GLuint CreateHeatmapTexture()
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return textureID;
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}
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void SetHeatmapData(int plotID, const ImS8* values, int rows, int cols) { SetTextureData(plotID, values, rows, cols, GL_BYTE); }
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void SetHeatmapData(int plotID, const ImU8* values, int rows, int cols) { SetTextureData(plotID, values, rows, cols, GL_UNSIGNED_BYTE); }
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void SetHeatmapData(int plotID, const ImS16* values, int rows, int cols) { SetTextureData(plotID, values, rows, cols, GL_SHORT); }
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void SetHeatmapData(int plotID, const ImU16* values, int rows, int cols) { SetTextureData(plotID, values, rows, cols, GL_UNSIGNED_SHORT); }
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void SetHeatmapData(int plotID, const ImS32* values, int rows, int cols) { SetTextureData(plotID, values, rows, cols, GL_INT); }
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void SetHeatmapData(int plotID, const ImU32* values, int rows, int cols) { SetTextureData(plotID, values, rows, cols, GL_UNSIGNED_INT); }
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void SetHeatmapData(int plotID, const float* values, int rows, int cols) { SetTextureData(plotID, values, rows, cols, GL_FLOAT); }
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void SetHeatmapData(int plotID, const ImS8* values, int rows, int cols) { SetTextureData(plotID, values, rows, cols, GL_R8I, GL_RED_INTEGER, GL_BYTE); }
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void SetHeatmapData(int plotID, const ImU8* values, int rows, int cols) { SetTextureData(plotID, values, rows, cols, GL_R8UI, GL_RED_INTEGER, GL_UNSIGNED_BYTE); }
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void SetHeatmapData(int plotID, const ImS16* values, int rows, int cols) { SetTextureData(plotID, values, rows, cols, GL_R16I, GL_RED_INTEGER, GL_SHORT); }
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void SetHeatmapData(int plotID, const ImU16* values, int rows, int cols) { SetTextureData(plotID, values, rows, cols, GL_R16UI, GL_RED_INTEGER, GL_UNSIGNED_SHORT); }
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void SetHeatmapData(int plotID, const ImS32* values, int rows, int cols) { SetTextureData(plotID, values, rows, cols, GL_R32I, GL_RED_INTEGER, GL_INT); }
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void SetHeatmapData(int plotID, const ImU32* values, int rows, int cols) { SetTextureData(plotID, values, rows, cols, GL_R32UI, GL_RED_INTEGER, GL_UNSIGNED_INT); }
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void SetHeatmapData(int plotID, const float* values, int rows, int cols) { SetTextureData(plotID, values, rows, cols, GL_R32F, GL_RED, GL_FLOAT); }
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void SetHeatmapData(int plotID, const double* values, int rows, int cols)
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{
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@ -251,7 +279,7 @@ void SetHeatmapData(int plotID, const double* values, int rows, int cols)
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for(int i = 0; i < rows*cols; i++)
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Context.temp1[i] = (float)values[i];
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SetTextureData(plotID, Context.temp1.Data, rows, cols, GL_FLOAT);
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SetTextureData(plotID, Context.temp1.Data, rows, cols, GL_R32F, GL_RED, GL_FLOAT);
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}
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void SetHeatmapData(int plotID, const ImS64* values, int rows, int cols)
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@ -264,7 +292,7 @@ void SetHeatmapData(int plotID, const ImS64* values, int rows, int cols)
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for(int i = 0; i < rows*cols; i++)
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Context.temp2[i] = (ImS32)values[i];
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SetTextureData(plotID, Context.temp2.Data, rows, cols, GL_INT);
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SetTextureData(plotID, Context.temp2.Data, rows, cols, GL_R32I, GL_RED_INTEGER, GL_INT);
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}
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void SetHeatmapData(int plotID, const ImU64* values, int rows, int cols)
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@ -277,7 +305,7 @@ void SetHeatmapData(int plotID, const ImU64* values, int rows, int cols)
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for(int i = 0; i < rows*cols; i++)
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Context.temp3[i] = (ImU32)values[i];
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SetTextureData(plotID, Context.temp3.Data, rows, cols, GL_UNSIGNED_INT);
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SetTextureData(plotID, Context.temp3.Data, rows, cols, GL_R32UI, GL_RED_INTEGER, GL_UNSIGNED_INT);
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}
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void RenderHeatmap(int plotID, ImDrawList& DrawList, const ImVec2& bounds_min, const ImVec2& bounds_max, float scale_min, float scale_max, ImPlotColormap colormap)
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@ -305,7 +333,7 @@ void RenderHeatmap(int plotID, ImDrawList& DrawList, const ImVec2& bounds_min, c
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data.MaxValue = scale_max;
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}
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if(Context.g_ShaderProgram == 0)
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if(Context.ShaderInt.ID == 0)
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DrawList.AddCallback(CreateShader, nullptr);
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DrawList.AddCallback(RenderCallback, (void*)(intptr_t)plotID);
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