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Visualisation options for actors #316

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sphaero opened this issue Dec 1, 2023 · 2 comments
Open

Visualisation options for actors #316

sphaero opened this issue Dec 1, 2023 · 2 comments

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@sphaero
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sphaero commented Dec 1, 2023

This is a multithreading issue so it might be best to look how we can do this through Imgui.

See for custom drawlist options:

@sphaero
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sphaero commented Dec 1, 2023

Simple test using stdimage and pass the loaded image pointer through a sphactor_report. It;s ugly but it works. We can't free in the imgui render code but anyway.

In the actor, load image and pass the pointer through a report:

int image_width = 0;
int image_height = 0;
unsigned char* image_data = stbi_load("/tmp/img.jpg", &image_width, &image_height, NULL, 4);
if (image_data == NULL)
    return NULL;

int64_t paddr = (int64_t)image_data;
zsys_info("%i %i", paddr, image_data);
zosc_t *reportm = zosc_create("/triggerreport", "shsisi", "image", paddr, "width", image_width, "height", image_height);;
sphactor_actor_set_custom_report_data((sphactor_actor_t *)ev->actor, reportm);

In gazebosc we enhance RenderCustomReport to render an image if first name is image:

ImGui::BeginGroup();
                        if (streq(nameStr, "image"))
                        {
                            data = zosc_next(customData, &type); // next is the pointer
                            int64_t pointeraddr;
                            rc = zosc_pop_int64(customData, &pointeraddr);
                            assert(rc == 0);
                            unsigned char *image_data = (unsigned char *)pointeraddr;
                            zsys_info("retr %i %i", pointeraddr, image_data);
                            char *name;
                            int image_width = 0;
                            int image_height = 0;
                            data = zosc_next(customData, &type);
                            rc = zosc_pop_string(customData, &name);
                            assert(rc == 0);
                            assert(streq(name, "width"));
                            zstr_free(&name);
                            data = zosc_next(customData, &type);
                            rc = zosc_pop_int32(customData, &image_width);
                            assert(rc == 0);

                            data = zosc_next(customData, &type);
                            zosc_pop_string(customData, &name);
                            assert(streq(name, "height"));
                            zstr_free(&name);
                            data = zosc_next(customData, &type);
                            rc = zosc_pop_int32(customData, &image_height);
                            assert(rc == 0);

                            zsys_info("pointer %i, width %i, height %i", image_data, image_width, image_height);
                            // Create a OpenGL texture identifier
                            GLuint image_texture;
                            glGenTextures(1, &image_texture);
                            glBindTexture(GL_TEXTURE_2D, image_texture);

                            // Setup filtering parameters for display
                            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
                            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
                            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); // This is required on WebGL for non power-of-two textures
                            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); // Same

                            // Upload pixels into texture
                            glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, image_width, image_height, 0, GL_RGBA, GL_UNSIGNED_BYTE, image_data);
                            //stbi_image_free(image_data);

                            ImGui::SetNextItemWidth(LABEL_WIDTH);
                            ImGui::Text("size = %d x %d", image_width, image_height);
                            //ImGui::SameLine();
                            ImGui::SetNextItemWidth(VALUE_WIDTH);
                            //ImGui::SetNextItemWidth(LABEL_WIDTH+VALUE_WIDTH);
                            ImGui::Image((void*)(intptr_t)image_texture, ImVec2(image_width, image_height));
                            ImGui::EndGroup();
                            //ImGui::End();
                        }
                        else if (!streq(nameStr, "lastActive")) {
                            ImGui::SetNextItemWidth(LABEL_WIDTH);
                            ImGui::Text("%s:", nameStr);
                            ImGui::SameLine();
                            ImGui::SetNextItemWidth(VALUE_WIDTH);
                        }

@sphaero
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sphaero commented Dec 1, 2023

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