From f28e9c3e03a9f94764b3811f7c4aa01991943fc7 Mon Sep 17 00:00:00 2001 From: fschildt Date: Wed, 17 Sep 2025 15:30:21 +0200 Subject: switch to software renderer --- src/renderer/opengl/GlIndexBuffer.cpp | 44 ------- src/renderer/opengl/GlIndexBuffer.hpp | 23 ---- src/renderer/opengl/GlRenderer.cpp | 220 --------------------------------- src/renderer/opengl/GlRenderer.hpp | 34 ----- src/renderer/opengl/GlShader.cpp | 80 ------------ src/renderer/opengl/GlShader.hpp | 15 --- src/renderer/opengl/GlVertexBuffer.cpp | 54 -------- src/renderer/opengl/GlVertexBuffer.hpp | 27 ---- 8 files changed, 497 deletions(-) delete mode 100644 src/renderer/opengl/GlIndexBuffer.cpp delete mode 100644 src/renderer/opengl/GlIndexBuffer.hpp delete mode 100644 src/renderer/opengl/GlRenderer.cpp delete mode 100644 src/renderer/opengl/GlRenderer.hpp delete mode 100644 src/renderer/opengl/GlShader.cpp delete mode 100644 src/renderer/opengl/GlShader.hpp delete mode 100644 src/renderer/opengl/GlVertexBuffer.cpp delete mode 100644 src/renderer/opengl/GlVertexBuffer.hpp (limited to 'src/renderer/opengl') diff --git a/src/renderer/opengl/GlIndexBuffer.cpp b/src/renderer/opengl/GlIndexBuffer.cpp deleted file mode 100644 index c5bd713..0000000 --- a/src/renderer/opengl/GlIndexBuffer.cpp +++ /dev/null @@ -1,44 +0,0 @@ -#include - -#include -#include -#include -#include - -void GlIndexBuffer::Init() { - m_CurrentIndex = 0; - m_Indices.reserve(16384); - glGenBuffers(1, &m_Id); - glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, m_Id); -} - -uint32_t *GlIndexBuffer::GetData() { - return m_Indices.data(); -} - -uint32_t GlIndexBuffer::GetCount() { - uint32_t count = static_cast(m_Indices.size()); - return count; -} - -void GlIndexBuffer::Reset() { - m_CurrentIndex = 0; - m_Indices.clear(); -} - -void GlIndexBuffer::PushRectangle() { - uint32_t current_index = m_CurrentIndex; - m_Indices.push_back(current_index + 0); - m_Indices.push_back(current_index + 1); - m_Indices.push_back(current_index + 2); - m_Indices.push_back(current_index + 0); - m_Indices.push_back(current_index + 2); - m_Indices.push_back(current_index + 3); - m_CurrentIndex += 4; -} - -void GlIndexBuffer::TransferData() { - size_t size = m_Indices.size() * sizeof(uint32_t); - glBufferData(GL_ELEMENT_ARRAY_BUFFER, size, m_Indices.data(), GL_STATIC_DRAW); -} - diff --git a/src/renderer/opengl/GlIndexBuffer.hpp b/src/renderer/opengl/GlIndexBuffer.hpp deleted file mode 100644 index 7805460..0000000 --- a/src/renderer/opengl/GlIndexBuffer.hpp +++ /dev/null @@ -1,23 +0,0 @@ -#pragma once - -#include - -class GlIndexBuffer { -public: - GlIndexBuffer() = default; - void Init(); - void Reset(); - -public: - uint32_t GetCount(); - uint32_t *GetData(); - - void PushRectangle(); - void TransferData(); - -private: - uint32_t m_Id; - uint32_t m_CurrentIndex; - std::vector m_Indices; -}; - diff --git a/src/renderer/opengl/GlRenderer.cpp b/src/renderer/opengl/GlRenderer.cpp deleted file mode 100644 index 5d7c985..0000000 --- a/src/renderer/opengl/GlRenderer.cpp +++ /dev/null @@ -1,220 +0,0 @@ -#include -#include -#include -#include -#include -#include -#include - -#include -#include -#include -#include -#include -#include - -void GLAPIENTRY -MessageCallback(GLenum source, - GLenum type, - GLuint id, - GLenum severity, - GLsizei length, - const GLchar* message, - const void* userParam) -{ - fprintf(stderr, "GL CALLBACK: %s, type = 0x%x, severity = 0x%x, message = %s\n", - type == GL_DEBUG_TYPE_ERROR ? "** GL ERROR **" : "", - type, - severity, - message - ); -} - -GlRenderer::~GlRenderer() { - SDL_GL_DestroyContext(m_Context); -} - -GlRenderer::GlRenderer(SDL_Window *window) - : m_Window(window), m_Context(nullptr) { -} - -bool GlRenderer::Init() { - SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 3); - SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 3); - SDL_GLContext sdl_gl_context = SDL_GL_CreateContext(m_Window); - if (!sdl_gl_context) { - return false; - } - - GLenum err = glewInit(); - if (GLEW_OK != err) - { - fprintf(stderr, "Error: %s\n", glewGetErrorString(err)); - SDL_GL_DestroyContext(sdl_gl_context); - return false; - } - -#if 0 - glEnable(GL_DEBUG_OUTPUT); - glDebugMessageCallback(MessageCallback, 0); -#endif - - GLuint vertex_array; - glGenVertexArrays(1, &vertex_array); - glBindVertexArray(vertex_array); - - - // init rectangle rendering - if (!m_RectangleShader.InitProgram()) { - return false; - } - m_RectangleVertexBuffer.Init(); - m_RectangleIndexBuffer.Init(); - - - // init text rendering - if (!m_TextShader.InitProgram()) { - return false; - } - m_TextVertexBuffer.Init(); - m_TextIndexBuffer.Init(); - - - m_Context = sdl_gl_context; - return true; -} - -void GlRenderer::Draw(RenderGroup& render_group) { - render_group.Sort(); - - float camera_width = render_group.m_CameraWidth; - float camera_height = render_group.m_CameraHeight; - - - glViewport(0, 0, render_group.m_ScreenWidth, render_group.m_ScreenHeight); - glClearColor(render_group.m_ClearColor.x, - render_group.m_ClearColor.y, - render_group.m_ClearColor.z, - 1.0f); - glClear(GL_COLOR_BUFFER_BIT); - - - // viewport space - float scale = render_group.GetScale(); - int32_t viewport_width = static_cast(camera_width * scale); - int32_t viewport_height = static_cast(camera_height * scale); - int32_t viewport_x0 = (render_group.m_ScreenWidth - viewport_width) / 2; - int32_t viewport_y0 = (render_group.m_ScreenHeight - viewport_height) / 2; - glViewport(viewport_x0, viewport_y0, viewport_width, viewport_height); - - - // draw batches - float last_z = -1; - for (auto [z, entity_index] : render_group.m_RSortEntries) { - REntity& render_entity = render_group.m_REntities[entity_index]; - switch (render_entity.type) { - case REntityType_Rectangle: { - // clip space (from camera space to [-1, 1] for pos and [0, 2] for dim) - V3F32 pos = render_entity.rect.pos; - V2F32 dim = render_entity.rect.dim; - pos.x = 2*(pos.x / camera_width) - 1; - pos.y = 2*(pos.y / camera_height) - 1; - dim.x = 2*(dim.x / camera_width); - dim.y = 2*(dim.y / camera_height); - - if (render_entity.rect.pos.z > last_z) { - DrawBatch(); - last_z = z; - } - - m_RectangleVertexBuffer.PushRectangle(pos, dim, render_entity.rect.color); - m_RectangleIndexBuffer.PushRectangle(); - } - - case REntityType_Bitmap: { - REntity_Bitmap& bitmap = render_entity.bitmap; - - // clip space (from camera space to [-1, 1] for pos and [0, 2] for dim) - V3F32 pos = render_entity.bitmap.pos; - pos.x = 2*(pos.x / camera_width) - 1; - pos.y = 2*(pos.y / camera_height) - 1; - -#if 0 - - // create setup texture - unsigned int texture_id; - glGenTextures(1, &texture_id); - glBindTexture(GL_TEXTURE_2D, texture_id); - glTexImage2D(GL_TEXTURE_2D, 0, GL_RED, bitmap.width, bitmap.height, 0, GL_RGB, GL_UNSIGNED_BYTE, bitmap.data); - - glGenerateMipmap(GL_TEXTURE_2D); - - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT); - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT); - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR); - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); - - - // apply texture - glVertexAttribPointer(2, 2, GL_FLOAT, GL_FALSE, 8 * sizeof(float), (void*)(6 * sizeof(float))); - glEnableVertexAttribArray(2); - - // delete texture - glDeleteTextures(1, &texture_id); - - - - // 1) set vertex buffer - // 2) set texture coordinates - pos.x = 2*(pos.x / camera_width) - 1; - pos.y = 2*(pos.y / camera_height) - 1; - dim.x = 2*(dim.x / camera_width); - dim.y = 2*(dim.y / camera_height); - if (render_entity.rect.pos.z > last_z) { - DrawBatch(); - last_z = z; - } -#endif - - - } break; - - InvalidDefaultCase; - } - } - - DrawBatch(); -} - -void GlRenderer::Present() { - SDL_GL_SwapWindow(m_Window); -} - -void GlRenderer::DrawBatch() { - int32_t rectangle_index_count = static_cast(m_RectangleIndexBuffer.GetCount()); - int32_t text_index_count = static_cast(m_TextIndexBuffer.GetCount()); - - if (rectangle_index_count) { - m_RectangleVertexBuffer.TransferData(); - m_RectangleIndexBuffer.TransferData(); - m_RectangleShader.UseProgram(); - - glDrawElements(GL_TRIANGLES, rectangle_index_count, GL_UNSIGNED_INT, 0); - - m_RectangleVertexBuffer.Reset(); - m_RectangleIndexBuffer.Reset(); - } - - if (text_index_count) { - m_TextVertexBuffer.TransferData(); - m_TextIndexBuffer.TransferData(); - m_TextShader.UseProgram(); - - glDrawElements(GL_TRIANGLES, text_index_count, GL_UNSIGNED_INT, 0); - - m_TextVertexBuffer.Reset(); - m_TextIndexBuffer.Reset(); - } -} - - diff --git a/src/renderer/opengl/GlRenderer.hpp b/src/renderer/opengl/GlRenderer.hpp deleted file mode 100644 index d59ba45..0000000 --- a/src/renderer/opengl/GlRenderer.hpp +++ /dev/null @@ -1,34 +0,0 @@ -#pragma once - -#include -#include -#include -#include - -class GlRenderer : public Renderer { -public: - GlRenderer(SDL_Window *window); - ~GlRenderer() override; - - bool Init() override; - void Draw(RenderGroup& render_group) override; - void Present() override; - - void InitTexture(); - -private: - void DrawBatch(); - -private: - SDL_Window *m_Window; - SDL_GLContext m_Context; - - GlVertexBuffer m_RectangleVertexBuffer; - GlIndexBuffer m_RectangleIndexBuffer; - GlShader m_RectangleShader; - - GlVertexBuffer m_TextVertexBuffer; - GlVertexBuffer m_TextIndexBuffer; - GlShader m_TextShader; -}; - diff --git a/src/renderer/opengl/GlShader.cpp b/src/renderer/opengl/GlShader.cpp deleted file mode 100644 index cf7c6c5..0000000 --- a/src/renderer/opengl/GlShader.cpp +++ /dev/null @@ -1,80 +0,0 @@ -#include -#include -#include - -static const char *s_vertex_shader_src = -"#version 330 core\n" -"layout (location = 0) in vec3 aPos;\n" -"layout (location = 1) in vec3 aColor;\n" -"\n" -"out vec4 vertexColor;\n" -"\n" -"void main()\n" -"{\n" -" gl_Position = vec4(aPos.xy, 0.0, 1.0);\n" -" vertexColor = vec4(aColor, 1.0);\n" -"}\n" -; - -static const char *s_fragment_shader_src = -"#version 330 core\n" -"in vec4 vertexColor;\n" -"\n" -"out vec4 FragColor;\n" -"\n" -"void main()\n" -"{\n" -" FragColor = vertexColor;\n" -"}\n" -; - -bool GlShader::InitProgram() { - GLuint vertex_shader; - GLuint fragment_shader; - if (!CompileShader(&vertex_shader, s_vertex_shader_src, GL_VERTEX_SHADER) || - !CompileShader(&fragment_shader, s_fragment_shader_src, GL_FRAGMENT_SHADER)) { - return false; - } - - GLuint program = glCreateProgram(); - glAttachShader(program, vertex_shader); - glAttachShader(program, fragment_shader); - glLinkProgram(program); - - glDeleteShader(vertex_shader); - glDeleteShader(fragment_shader); - - int success; - char info_log[512]; - glGetProgramiv(program, GL_LINK_STATUS, &success); - if (!success) { - printf("error linking shader program\n%s\n", info_log); - return false; - } - - m_ProgramId = program; - return true; -} - -void GlShader::UseProgram() { - glUseProgram(m_ProgramId); -} - -bool GlShader::CompileShader(GLuint *id, const char *src, GLenum type) { - GLuint shader = glCreateShader(type); - glShaderSource(shader, 1, &src, 0); - glCompileShader(shader); - - int success; - char info_log[512]; - glGetShaderiv(shader, GL_COMPILE_STATUS, &success); - if(!success) { - glGetShaderInfoLog(shader, 512, 0, info_log); - printf("error %s shader compilation failed\n%s\n", type == GL_VERTEX_SHADER ? "vertex" : "fragment", info_log); - glDeleteShader(shader); - return false; - } - - *id = shader; - return true; -} diff --git a/src/renderer/opengl/GlShader.hpp b/src/renderer/opengl/GlShader.hpp deleted file mode 100644 index d195a8a..0000000 --- a/src/renderer/opengl/GlShader.hpp +++ /dev/null @@ -1,15 +0,0 @@ -#pragma once - -#include - -class GlShader { -public: - GlShader() = default; - bool InitProgram(); - void UseProgram(); -private: - bool CompileShader(GLuint *id, const char *src, GLenum type); - -private: - GLuint m_ProgramId; -}; diff --git a/src/renderer/opengl/GlVertexBuffer.cpp b/src/renderer/opengl/GlVertexBuffer.cpp deleted file mode 100644 index f716c50..0000000 --- a/src/renderer/opengl/GlVertexBuffer.cpp +++ /dev/null @@ -1,54 +0,0 @@ -#include - -#include -#include - -#include - -void GlVertexBuffer::Init() { - m_Vertices.reserve(16384); - glGenBuffers(1, &m_Id); - glBindBuffer(GL_ARRAY_BUFFER, m_Id); -} - -void GlVertexBuffer::Reset() { - glDisableVertexAttribArray(0); - glDisableVertexAttribArray(1); - m_Vertices.clear(); -} - -float *GlVertexBuffer::GetData() { - return reinterpret_cast(m_Vertices.data()); -} - -uint32_t GlVertexBuffer::GetCount() { - return static_cast(m_Vertices.size()); -} - -void GlVertexBuffer::PushRectangle(V3F32 pos, V2F32 dim, V3F32 color) { - V3F32 positions[4] = { - V3F32(pos.x, pos.y, pos.z), - V3F32(pos.x + dim.x, pos.y, pos.z), - V3F32(pos.x + dim.x, pos.y + dim.y, pos.z), - V3F32(pos.x, pos.y + dim.y, pos.z), - }; - - for (int i = 0; i < 4; i++) { - GlVertex vertex = {}; - vertex.pos = positions[i]; - vertex.color = color; - m_Vertices.push_back(vertex); - } -} - -void GlVertexBuffer::TransferData() { - size_t size = m_Vertices.size() * sizeof(GlVertex); - GLsizei stride = sizeof(GlVertex); - const void *offset_color = (const void*)(3*sizeof(float)); - glEnableVertexAttribArray(0); - glEnableVertexAttribArray(1); - glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, stride, 0); - glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, stride, offset_color); - glBufferData(GL_ARRAY_BUFFER, size, m_Vertices.data(), GL_STATIC_DRAW); -} - diff --git a/src/renderer/opengl/GlVertexBuffer.hpp b/src/renderer/opengl/GlVertexBuffer.hpp deleted file mode 100644 index 4099ca2..0000000 --- a/src/renderer/opengl/GlVertexBuffer.hpp +++ /dev/null @@ -1,27 +0,0 @@ -#pragma once - -#include - -struct GlVertex { - V3F32 pos; - V3F32 color; -}; - -class GlVertexBuffer { -public: - GlVertexBuffer() = default; - void Init(); - void Reset(); - -public: - float *GetData(); - uint32_t GetCount(); - - void PushRectangle(V3F32 pos, V2F32 dim, V3F32 color); - void TransferData(); - -private: - uint32_t m_Id; - std::vector m_Vertices; -}; - -- cgit v1.2.3