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288
src/editor.cpp
Normal file
288
src/editor.cpp
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#include "editor.h"
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static void _editor_grid_set(Editor* self);
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static void
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_editor_grid_set(Editor* self)
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{
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std::vector<f32> vertices;
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s32 verticalLineCount = (s32)(EDITOR_SIZE.x / MIN(self->settings->editorGridSizeX, EDITOR_GRID_MIN));
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s32 horizontalLineCount = (s32)(EDITOR_SIZE.y / MIN(self->settings->editorGridSizeY, EDITOR_GRID_MIN));
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/* Vertical */
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for (s32 i = 0; i <= verticalLineCount; i++)
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{
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s32 x = i * self->settings->editorGridSizeX - self->settings->editorGridOffsetX;
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f32 normX = (2.0f * x) / EDITOR_SIZE.x - 1.0f;
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vertices.push_back(normX);
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vertices.push_back(-1.0f);
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vertices.push_back(normX);
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vertices.push_back(1.0f);
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}
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/* Horizontal */
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for (s32 i = 0; i <= horizontalLineCount; i++)
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{
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s32 y = i * self->settings->editorGridSizeY - self->settings->editorGridOffsetY;
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f32 normY = (2.0f * y) / EDITOR_SIZE.y - 1.0f;
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vertices.push_back(-1.0f);
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vertices.push_back(normY);
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vertices.push_back(1.0f);
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vertices.push_back(normY);
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}
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self->gridVertexCount = (s32)vertices.size();
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glBindVertexArray(self->gridVAO);
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glBindBuffer(GL_ARRAY_BUFFER, self->gridVBO);
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glBufferData(GL_ARRAY_BUFFER, vertices.size() * sizeof(f32), vertices.data(), GL_DYNAMIC_DRAW);
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glEnableVertexAttribArray(0);
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glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 2 * sizeof(f32), (void*)0);
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}
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void
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editor_init(Editor* self, Resources* resources, Settings* settings)
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{
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self->resources = resources;
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self->settings = settings;
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/* Framebuffer + texture */
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glGenFramebuffers(1, &self->fbo);
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glBindFramebuffer(GL_FRAMEBUFFER, self->fbo);
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glGenTextures(1, &self->texture);
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glBindTexture(GL_TEXTURE_2D, self->texture);
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glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, (s32)EDITOR_SIZE.x, (s32)EDITOR_SIZE.y, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, self->texture, 0);
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glGenRenderbuffers(1, &self->rbo);
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glBindRenderbuffer(GL_RENDERBUFFER, self->rbo);
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glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH24_STENCIL8, (s32)EDITOR_SIZE.x, (s32)EDITOR_SIZE.y);
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glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, GL_RENDERBUFFER, self->rbo);
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glBindFramebuffer(GL_FRAMEBUFFER, 0);
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/* Grid */
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glGenVertexArrays(1, &self->gridVAO);
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glGenBuffers(1, &self->gridVBO);
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/* Border */
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glGenVertexArrays(1, &self->borderVAO);
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glGenBuffers(1, &self->borderVBO);
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glBindVertexArray(self->borderVAO);
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glBindBuffer(GL_ARRAY_BUFFER, self->borderVBO);
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glBufferData(GL_ARRAY_BUFFER, sizeof(GL_VERTICES), GL_VERTICES, GL_STATIC_DRAW);
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glEnableVertexAttribArray(0);
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glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 2 * sizeof(f32), (void*)0);
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/* Viewing texture */
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glGenVertexArrays(1, &self->textureVAO);
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glGenBuffers(1, &self->textureVBO);
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glGenBuffers(1, &self->textureEBO);
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glBindVertexArray(self->textureVAO);
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glBindBuffer(GL_ARRAY_BUFFER, self->textureVBO);
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glBufferData(GL_ARRAY_BUFFER, sizeof(f32) * 4 * 4, NULL, GL_DYNAMIC_DRAW);
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glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, self->textureEBO);
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glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(GL_TEXTURE_INDICES), GL_TEXTURE_INDICES, GL_STATIC_DRAW);
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/* Position */
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glEnableVertexAttribArray(0);
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glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 4 * sizeof(f32), (void*)0);
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/* UV */
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glEnableVertexAttribArray(1);
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glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 4 * sizeof(f32), (void*)(2 * sizeof(f32)));
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glBindVertexArray(0);
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_editor_grid_set(self);
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}
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void
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editor_draw(Editor* self)
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{
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GLuint shaderLine = self->resources->shaders[SHADER_LINE];
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GLuint shaderLineDotted = self->resources->shaders[SHADER_LINE_DOTTED];
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GLuint shaderTexture = self->resources->shaders[SHADER_TEXTURE];
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f32 zoomFactor = self->settings->editorZoom / 100.0f;
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/* Convert pan to pixels */
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glm::vec2 ndcPan = glm::vec2(-self->settings->editorPanX / (EDITOR_SIZE.x / 2.0f), -self->settings->editorPanY / (EDITOR_SIZE.y / 2.0f));
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/* Transformation matrix */
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glm::mat4 editorTransform = glm::translate(glm::mat4(1.0f), glm::vec3(ndcPan, 0.0f));
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editorTransform = glm::scale(editorTransform, glm::vec3(zoomFactor, zoomFactor, 1.0f));
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glBindFramebuffer(GL_FRAMEBUFFER, self->fbo);
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glViewport(0, 0, EDITOR_SIZE.x, EDITOR_SIZE.y);
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glClearColor
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(
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self->settings->editorBackgroundColorR,
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self->settings->editorBackgroundColorG,
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self->settings->editorBackgroundColorB,
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self->settings->editorBackgroundColorA
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);
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glClear(GL_COLOR_BUFFER_BIT);
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if (self->spritesheetID > -1)
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{
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Texture* texture = &self->resources->textures[self->spritesheetID];
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glm::mat4 spritesheetTransform = editorTransform;
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glm::vec2 ndcScale = glm::vec2(texture->size.x, texture->size.y) / (EDITOR_SIZE * 0.5f);
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spritesheetTransform = glm::scale(spritesheetTransform, glm::vec3(ndcScale, 1.0f));
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glUseProgram(shaderTexture);
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glBindVertexArray(self->textureVAO);
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glBindBuffer(GL_ARRAY_BUFFER, self->textureVBO);
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glBufferData(GL_ARRAY_BUFFER, sizeof(GL_UV_VERTICES), GL_UV_VERTICES, GL_DYNAMIC_DRAW);
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glActiveTexture(GL_TEXTURE0);
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glBindTexture(GL_TEXTURE_2D, texture->id);
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glUniform1i(glGetUniformLocation(shaderTexture, SHADER_UNIFORM_TEXTURE), 0);
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glUniform4fv(glGetUniformLocation(shaderTexture, SHADER_UNIFORM_TINT), 1, value_ptr(COLOR_OPAQUE));
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glUniform3fv(glGetUniformLocation(shaderTexture, SHADER_UNIFORM_COLOR_OFFSET), 1, value_ptr(COLOR_OFFSET_NONE));
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glUniformMatrix4fv(glGetUniformLocation(shaderTexture, SHADER_UNIFORM_TRANSFORM), 1, GL_FALSE, value_ptr(spritesheetTransform));
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glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_INT, 0);
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glBindTexture(GL_TEXTURE_2D, 0);
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glBindVertexArray(0);
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glUseProgram(0);
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if (self->settings->editorIsBorder)
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{
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glUseProgram(shaderLineDotted);
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glBindVertexArray(self->borderVAO);
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glUniformMatrix4fv(glGetUniformLocation(shaderLine, SHADER_UNIFORM_TRANSFORM), 1, GL_FALSE, glm::value_ptr(spritesheetTransform));
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glUniform4fv(glGetUniformLocation(shaderLine, SHADER_UNIFORM_COLOR), 1, glm::value_ptr(EDITOR_BORDER_TINT));
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glDrawArrays(GL_LINE_LOOP, 0, 4);
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glBindVertexArray(0);
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glUseProgram(0);
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}
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if (self->isFrame)
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{
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glm::mat4 rectTransform = editorTransform;
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glm::vec2 rectNDCPos = self->frame.crop / (EDITOR_SIZE / 2.0f);
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glm::vec2 rectNDCScale = self->frame.size / (EDITOR_SIZE * 0.5f);
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rectTransform = glm::translate(rectTransform, glm::vec3(rectNDCPos, 0.0f));
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rectTransform = glm::scale(rectTransform, glm::vec3(rectNDCScale, 1.0f));
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glUseProgram(shaderLineDotted);
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glBindVertexArray(self->borderVAO);
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glUniformMatrix4fv(glGetUniformLocation(shaderLine, SHADER_UNIFORM_TRANSFORM), 1, GL_FALSE, glm::value_ptr(rectTransform));
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glUniform4fv(glGetUniformLocation(shaderLine, SHADER_UNIFORM_COLOR), 1, glm::value_ptr(EDITOR_FRAME_TINT));
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glDrawArrays(GL_LINE_LOOP, 0, 4);
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glBindVertexArray(0);
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glUseProgram(0);
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glm::mat4 pivotTransform = editorTransform;
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glm::vec2 pivotNDCPos = self->frame.pivot / (EDITOR_SIZE / 2.0f);
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glm::vec2 pivotNDCScale = ATLAS_SIZES[TEXTURE_PIVOT] / (EDITOR_SIZE * 0.5f);
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pivotTransform = glm::translate(pivotTransform, glm::vec3(pivotNDCPos, 0.0f));
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pivotTransform = glm::scale(pivotTransform, glm::vec3(pivotNDCScale, 1.0f));
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glUseProgram(shaderTexture);
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glBindVertexArray(self->textureVAO);
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glBindBuffer(GL_ARRAY_BUFFER, self->textureVBO);
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f32 vertices[] = ATLAS_UV_VERTICES(TEXTURE_PIVOT);
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glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_DYNAMIC_DRAW);
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glActiveTexture(GL_TEXTURE0);
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glBindTexture(GL_TEXTURE_2D, self->resources->atlas.id);
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glUniform1i(glGetUniformLocation(shaderTexture, SHADER_UNIFORM_TEXTURE), 0);
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glUniform4fv(glGetUniformLocation(shaderTexture, SHADER_UNIFORM_TINT), 1, value_ptr(EDITOR_FRAME_TINT));
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glUniform3fv(glGetUniformLocation(shaderTexture, SHADER_UNIFORM_COLOR_OFFSET), 1, value_ptr(COLOR_OFFSET_NONE));
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glUniformMatrix4fv(glGetUniformLocation(shaderTexture, SHADER_UNIFORM_TRANSFORM), 1, GL_FALSE, value_ptr(pivotTransform));
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glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_INT, 0);
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glBindVertexArray(0);
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glBindBuffer(GL_ARRAY_BUFFER, 0);
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glBindTexture(GL_TEXTURE_2D, 0);
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glUseProgram(0);
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}
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}
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if (self->settings->editorIsGrid)
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{
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if
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(
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(ivec2(self->settings->editorGridSizeX, self->settings->editorGridSizeY) != self->oldGridSize) ||
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(ivec2(self->settings->editorGridOffsetX, self->settings->editorGridOffsetY) != self->oldGridOffset)
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)
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_editor_grid_set(self);
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glUseProgram(shaderLine);
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glBindVertexArray(self->gridVAO);
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glUniformMatrix4fv(glGetUniformLocation(shaderLine, SHADER_UNIFORM_TRANSFORM), 1, GL_FALSE, (f32*)value_ptr(editorTransform));
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glUniform4f
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(
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glGetUniformLocation(shaderLine, SHADER_UNIFORM_COLOR),
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self->settings->editorGridColorR, self->settings->editorGridColorG, self->settings->editorGridColorB, self->settings->editorGridColorA
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);
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glDrawArrays(GL_LINES, 0, self->gridVertexCount);
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glBindVertexArray(0);
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glUseProgram(0);
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}
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glBindFramebuffer(GL_FRAMEBUFFER, 0);
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}
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void
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editor_tick(Editor* self)
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{
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self->settings->editorZoom = CLAMP(self->settings->editorZoom, EDITOR_ZOOM_MIN, EDITOR_ZOOM_MAX);
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self->oldGridSize = glm::vec2(self->settings->editorGridSizeX, self->settings->editorGridSizeY);
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self->oldGridOffset = glm::vec2(self->settings->editorGridOffsetX, self->settings->editorGridOffsetY);
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}
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void
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editor_free(Editor* self)
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{
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glDeleteTextures(1, &self->texture);
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glDeleteFramebuffers(1, &self->fbo);
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glDeleteRenderbuffers(1, &self->rbo);
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}
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