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https://github.com/SoftFever/OrcaSlicer.git
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Tech ENABLE_GL_IMGUI_SHADERS - Render imgui using shaders
(cherry picked from commit prusa3d/PrusaSlicer@d0d89a4d5b)
This commit is contained in:
enricoturri1966
Noisyfox
parent
8dc82e7a8d
commit
15bad7fc19
6 changed files with 140 additions and 41 deletions
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@ -29,13 +29,16 @@
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#include "libslic3r/Utils.hpp"
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#include "libslic3r/Color.hpp"
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#include "libslic3r/Shape/TextShape.hpp"
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#include "3DScene.hpp"
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#include "GUI.hpp"
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#include "I18N.hpp"
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#include "Search.hpp"
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#include "BitmapCache.hpp"
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#include "GUI_App.hpp"
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#include "../Utils/MacDarkMode.hpp"
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#include "nanosvg/nanosvg.h"
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#include "nanosvg/nanosvgrast.h"
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#include "OpenGLManager.hpp"
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@ -2386,13 +2389,25 @@ void ImGuiWrapper::init_style()
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void ImGuiWrapper::render_draw_data(ImDrawData *draw_data)
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{
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if (draw_data == nullptr || draw_data->CmdListsCount == 0)
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return;
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GLShaderProgram* shader = wxGetApp().get_shader("imgui");
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if (shader == nullptr)
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return;
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// Avoid rendering when minimized, scale coordinates for retina displays (screen coordinates != framebuffer coordinates)
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ImGuiIO& io = ImGui::GetIO();
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const int fb_width = (int)(draw_data->DisplaySize.x * io.DisplayFramebufferScale.x);
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const int fb_width = (int)(draw_data->DisplaySize.x * io.DisplayFramebufferScale.x);
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const int fb_height = (int)(draw_data->DisplaySize.y * io.DisplayFramebufferScale.y);
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if (fb_width == 0 || fb_height == 0)
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return;
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draw_data->ScaleClipRects(io.DisplayFramebufferScale);
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GLShaderProgram* curr_shader = wxGetApp().get_current_shader();
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if (curr_shader != nullptr)
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curr_shader->stop_using();
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shader->start_using();
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// We are using the OpenGL fixed pipeline to make the example code simpler to read!
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// Setup render state: alpha-blending enabled, no face culling, no depth testing, scissor enabled, vertex/texcoord/color pointers, polygon fill.
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@ -2400,45 +2415,72 @@ void ImGuiWrapper::render_draw_data(ImDrawData *draw_data)
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GLint last_polygon_mode[2]; glsafe(::glGetIntegerv(GL_POLYGON_MODE, last_polygon_mode));
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GLint last_viewport[4]; glsafe(::glGetIntegerv(GL_VIEWPORT, last_viewport));
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GLint last_scissor_box[4]; glsafe(::glGetIntegerv(GL_SCISSOR_BOX, last_scissor_box));
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GLint last_texture_env_mode; glsafe(::glGetTexEnviv(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, &last_texture_env_mode));
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glsafe(::glPushAttrib(GL_ENABLE_BIT | GL_COLOR_BUFFER_BIT | GL_TRANSFORM_BIT));
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glsafe(::glEnable(GL_BLEND));
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glsafe(::glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA));
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glsafe(::glDisable(GL_CULL_FACE));
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glsafe(::glDisable(GL_DEPTH_TEST));
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glsafe(::glDisable(GL_LIGHTING));
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glsafe(::glDisable(GL_COLOR_MATERIAL));
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glsafe(::glEnable(GL_SCISSOR_TEST));
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glsafe(::glEnableClientState(GL_VERTEX_ARRAY));
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glsafe(::glEnableClientState(GL_TEXTURE_COORD_ARRAY));
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glsafe(::glEnableClientState(GL_COLOR_ARRAY));
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glsafe(::glEnable(GL_TEXTURE_2D));
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glsafe(::glPolygonMode(GL_FRONT_AND_BACK, GL_FILL));
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glsafe(::glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE));
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GLint texture_env_mode = GL_MODULATE;
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glsafe(::glGetTexEnviv(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, &texture_env_mode));
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glsafe(::glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE));
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//glUseProgram(0); // You may want this if using this code in an OpenGL 3+ context where shaders may be bound
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// Setup viewport, orthographic projection matrix
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// Our visible imgui space lies from draw_data->DisplayPps (top left) to draw_data->DisplayPos+data_data->DisplaySize (bottom right). DisplayMin is typically (0,0) for single viewport apps.
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// Our visible imgui space lies from draw_data->DisplayPos (top left) to draw_data->DisplayPos+data_data->DisplaySize (bottom right). DisplayPos is (0,0) for single viewport apps.
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glsafe(::glViewport(0, 0, (GLsizei)fb_width, (GLsizei)fb_height));
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glsafe(::glMatrixMode(GL_PROJECTION));
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glsafe(::glPushMatrix());
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glsafe(::glLoadIdentity());
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glsafe(::glOrtho(draw_data->DisplayPos.x, draw_data->DisplayPos.x + draw_data->DisplaySize.x, draw_data->DisplayPos.y + draw_data->DisplaySize.y, draw_data->DisplayPos.y, -1.0f, +1.0f));
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glsafe(::glMatrixMode(GL_MODELVIEW));
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glsafe(::glPushMatrix());
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glsafe(::glLoadIdentity());
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const float L = draw_data->DisplayPos.x;
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const float R = draw_data->DisplayPos.x + draw_data->DisplaySize.x;
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const float T = draw_data->DisplayPos.y;
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const float B = draw_data->DisplayPos.y + draw_data->DisplaySize.y;
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Matrix4f ortho_projection;
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ortho_projection <<
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2.0f / (R - L), 0.0f, 0.0f, (R + L) / (L - R),
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0.0f, 2.0f / (T - B), 0.0f, (T + B) / (B - T),
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0.0f, 0.0f, -1.0f, 0.0f,
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0.0f, 0.0f, 0.0f, 1.0f;
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shader->set_uniform("Texture", 0);
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shader->set_uniform("ProjMtx", ortho_projection);
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// Will project scissor/clipping rectangles into framebuffer space
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const ImVec2 clip_off = draw_data->DisplayPos; // (0,0) unless using multi-viewports
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const ImVec2 clip_scale = draw_data->FramebufferScale; // (1,1) unless using retina display which are often (2,2)
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// Render command lists
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ImVec2 pos = draw_data->DisplayPos;
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for (int n = 0; n < draw_data->CmdListsCount; ++n) {
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const ImDrawList* cmd_list = draw_data->CmdLists[n];
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const ImDrawVert* vtx_buffer = cmd_list->VtxBuffer.Data;
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const ImDrawIdx* idx_buffer = cmd_list->IdxBuffer.Data;
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glsafe(::glVertexPointer(2, GL_FLOAT, sizeof(ImDrawVert), (const GLvoid*)((const char*)vtx_buffer + IM_OFFSETOF(ImDrawVert, pos))));
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glsafe(::glTexCoordPointer(2, GL_FLOAT, sizeof(ImDrawVert), (const GLvoid*)((const char*)vtx_buffer + IM_OFFSETOF(ImDrawVert, uv))));
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glsafe(::glColorPointer(4, GL_UNSIGNED_BYTE, sizeof(ImDrawVert), (const GLvoid*)((const char*)vtx_buffer + IM_OFFSETOF(ImDrawVert, col))));
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const GLsizeiptr vtx_buffer_size = (GLsizeiptr)cmd_list->VtxBuffer.Size * (int)sizeof(ImDrawVert);
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const GLsizeiptr idx_buffer_size = (GLsizeiptr)cmd_list->IdxBuffer.Size * (int)sizeof(ImDrawIdx);
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GLuint vbo_id;
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glsafe(::glGenBuffers(1, &vbo_id));
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glsafe(::glBindBuffer(GL_ARRAY_BUFFER, vbo_id));
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glsafe(::glBufferData(GL_ARRAY_BUFFER, vtx_buffer_size, vtx_buffer, GL_STATIC_DRAW));
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GLuint ibo_id;
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glsafe(::glGenBuffers(1, &ibo_id));
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glsafe(::glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, ibo_id));
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glsafe(::glBufferData(GL_ELEMENT_ARRAY_BUFFER, idx_buffer_size, idx_buffer, GL_STATIC_DRAW));
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const int position_id = shader->get_attrib_location("Position");
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if (position_id != -1) {
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glsafe(::glVertexAttribPointer(position_id, 2, GL_FLOAT, GL_FALSE, sizeof(ImDrawVert), (GLvoid*)IM_OFFSETOF(ImDrawVert, pos)));
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glsafe(::glEnableVertexAttribArray(position_id));
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}
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const int uv_id = shader->get_attrib_location("UV");
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if (uv_id != -1) {
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glsafe(::glVertexAttribPointer(uv_id, 2, GL_FLOAT, GL_FALSE, sizeof(ImDrawVert), (GLvoid*)IM_OFFSETOF(ImDrawVert, uv)));
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glsafe(::glEnableVertexAttribArray(uv_id));
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}
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const int color_id = shader->get_attrib_location("Color");
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if (color_id != -1) {
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glsafe(::glVertexAttribPointer(color_id, 4, GL_UNSIGNED_BYTE, GL_TRUE, sizeof(ImDrawVert), (GLvoid*)IM_OFFSETOF(ImDrawVert, col)));
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glsafe(::glEnableVertexAttribArray(color_id));
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}
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for (int cmd_i = 0; cmd_i < cmd_list->CmdBuffer.Size; ++cmd_i) {
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const ImDrawCmd* pcmd = &cmd_list->CmdBuffer[cmd_i];
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@ -2446,34 +2488,46 @@ void ImGuiWrapper::render_draw_data(ImDrawData *draw_data)
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// User callback (registered via ImDrawList::AddCallback)
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pcmd->UserCallback(cmd_list, pcmd);
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else {
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ImVec4 clip_rect = ImVec4(pcmd->ClipRect.x - pos.x, pcmd->ClipRect.y - pos.y, pcmd->ClipRect.z - pos.x, pcmd->ClipRect.w - pos.y);
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if (clip_rect.x < fb_width && clip_rect.y < fb_height && clip_rect.z >= 0.0f && clip_rect.w >= 0.0f) {
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// Apply scissor/clipping rectangle
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glsafe(::glScissor((int)clip_rect.x, (int)(fb_height - clip_rect.w), (int)(clip_rect.z - clip_rect.x), (int)(clip_rect.w - clip_rect.y)));
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// Project scissor/clipping rectangles into framebuffer space
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const ImVec2 clip_min((pcmd->ClipRect.x - clip_off.x) * clip_scale.x, (pcmd->ClipRect.y - clip_off.y) * clip_scale.y);
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const ImVec2 clip_max((pcmd->ClipRect.z - clip_off.x) * clip_scale.x, (pcmd->ClipRect.w - clip_off.y) * clip_scale.y);
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if (clip_max.x <= clip_min.x || clip_max.y <= clip_min.y)
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continue;
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// Bind texture, Draw
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glsafe(::glBindTexture(GL_TEXTURE_2D, (GLuint)(intptr_t)pcmd->TextureId));
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glsafe(::glDrawElements(GL_TRIANGLES, (GLsizei)pcmd->ElemCount, sizeof(ImDrawIdx) == 2 ? GL_UNSIGNED_SHORT : GL_UNSIGNED_INT, idx_buffer));
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}
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// Apply scissor/clipping rectangle (Y is inverted in OpenGL)
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glsafe(::glScissor((int)clip_min.x, (int)(fb_height - clip_max.y), (int)(clip_max.x - clip_min.x), (int)(clip_max.y - clip_min.y)));
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// Bind texture, Draw
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glsafe(::glBindTexture(GL_TEXTURE_2D, (GLuint)(intptr_t)pcmd->GetTexID()));
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glsafe(::glDrawElements(GL_TRIANGLES, (GLsizei)pcmd->ElemCount, sizeof(ImDrawIdx) == 2 ? GL_UNSIGNED_SHORT : GL_UNSIGNED_INT, (void*)(intptr_t)(pcmd->IdxOffset * sizeof(ImDrawIdx))));
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}
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idx_buffer += pcmd->ElemCount;
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}
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if (position_id != -1)
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glsafe(::glDisableVertexAttribArray(position_id));
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if (uv_id != -1)
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glsafe(::glDisableVertexAttribArray(uv_id));
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if (color_id != -1)
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glsafe(::glDisableVertexAttribArray(color_id));
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glsafe(::glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0));
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glsafe(::glBindBuffer(GL_ARRAY_BUFFER, 0));
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glsafe(::glDeleteBuffers(1, &ibo_id));
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glsafe(::glDeleteBuffers(1, &vbo_id));
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}
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// Restore modified state
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glsafe(::glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, texture_env_mode));
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glsafe(::glDisableClientState(GL_COLOR_ARRAY));
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glsafe(::glDisableClientState(GL_TEXTURE_COORD_ARRAY));
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glsafe(::glDisableClientState(GL_VERTEX_ARRAY));
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glsafe(::glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, last_texture_env_mode));
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glsafe(::glBindTexture(GL_TEXTURE_2D, (GLuint)last_texture));
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glsafe(::glMatrixMode(GL_MODELVIEW));
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glsafe(::glPopMatrix());
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glsafe(::glMatrixMode(GL_PROJECTION));
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glsafe(::glPopMatrix());
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glsafe(::glPopAttrib());
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glsafe(::glPolygonMode(GL_FRONT, (GLenum)last_polygon_mode[0]); glPolygonMode(GL_BACK, (GLenum)last_polygon_mode[1]));
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glsafe(::glViewport(last_viewport[0], last_viewport[1], (GLsizei)last_viewport[2], (GLsizei)last_viewport[3]));
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glsafe(::glScissor(last_scissor_box[0], last_scissor_box[1], (GLsizei)last_scissor_box[2], (GLsizei)last_scissor_box[3]));
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if (curr_shader != nullptr)
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curr_shader->start_using();
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}
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bool ImGuiWrapper::display_initialized() const
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