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| Original file line number | Diff line number | Diff line change |
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| /* | ||
| * HelloTriangle.c | ||
| * | ||
| * Copyright (c) 2015 Lukas Hermanns. All rights reserved. | ||
| * Licensed under the terms of the BSD 3-Clause license (see LICENSE.txt). | ||
| */ | ||
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| #include <LLGL-C/LLGL.h> | ||
| #include <stdio.h> | ||
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| #define ENABLE_MULTISAMPLING 1 | ||
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| int main(int argc, char* argv[]) | ||
| { | ||
| // Load render system module | ||
| const char* rendererModule = "OpenGL"; | ||
| if (llglLoadRenderSystem(rendererModule) == 0) | ||
| { | ||
| fprintf(stderr, "Failed to load render system: %s\n", rendererModule); | ||
| return 1; | ||
| } | ||
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| // Create swap-chain | ||
| LLGLSwapChainDescriptor swapChainDesc = | ||
| { | ||
| .resolution = { 800, 600 }, | ||
| .colorBits = 32, | ||
| .depthBits = 0, // We don't need a depth buffer for this example | ||
| .stencilBits = 0, // We don't need a stencil buffer for this example | ||
| #if ENABLE_MULTISAMPLING | ||
| .samples = 8, // check if LLGL adapts sample count that is too high | ||
| #endif | ||
| }; | ||
| LLGLSwapChain swapChain = llglCreateSwapChain(&swapChainDesc); | ||
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| // Enable V-sync | ||
| llglSetVsyncInterval(swapChain, 1); | ||
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| // Set window title and show window | ||
| LLGLSurface surface = llglGetSurface(swapChain); | ||
| LLGLWindow window = LLGL_GET_AS(LLGLWindow, surface); | ||
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| llglSetWindowTitle(window, L"LLGL C99 Example: Hello Triangle"); | ||
| llglShowWindow(window, true); | ||
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| // Vertex data structure | ||
| typedef struct Vertex | ||
| { | ||
| float position[2]; | ||
| uint8_t color[4]; | ||
| } | ||
| Vertex; | ||
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| // Vertex data (3 vertices for our triangle) | ||
| const float s = 0.5f; | ||
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| Vertex vertices[] = | ||
| { | ||
| { { 0, s }, { 255, 0, 0, 255 } }, // 1st vertex: center-top, red | ||
| { { s, -s }, { 0, 255, 0, 255 } }, // 2nd vertex: right-bottom, green | ||
| { { -s, -s }, { 0, 0, 255, 255 } }, // 3rd vertex: left-bottom, blue | ||
| }; | ||
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| // Vertex format with 2D floating-point vector for position and 4D byte vector for color | ||
| LLGLVertexAttribute vertexAttributes[2] = | ||
| { | ||
| { .name = "position", .format = LLGLFormatRG32Float, .location = 0, .offset = 0, .stride = sizeof(Vertex) }, | ||
| { .name = "color", .format = LLGLFormatRGBA8UNorm, .location = 1, .offset = offsetof(Vertex, color), .stride = sizeof(Vertex) }, | ||
| }; | ||
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| // Create vertex buffer | ||
| LLGLBufferDescriptor vertexBufferDesc = | ||
| { | ||
| .size = sizeof(vertices), // Size (in bytes) of the vertex buffer | ||
| .bindFlags = LLGLBindVertexBuffer, // Enables the buffer to be bound to a vertex buffer slot | ||
| .numVertexAttribs = 2, | ||
| .vertexAttribs = vertexAttributes, // Vertex format layout | ||
| }; | ||
| LLGLBuffer vertexBuffer = llglCreateBuffer(&vertexBufferDesc, vertices); | ||
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| // Create shaders | ||
| LLGLShaderDescriptor vertShaderDesc = { .type = LLGLShaderTypeVertex, .source = "HelloTriangle.vert", .sourceType = LLGLShaderSourceTypeCodeFile, }; | ||
| LLGLShaderDescriptor fragShaderDesc = { .type = LLGLShaderTypeFragment, .source = "HelloTriangle.frag", .sourceType = LLGLShaderSourceTypeCodeFile, }; | ||
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| // Specify vertex attributes for vertex shader | ||
| vertShaderDesc.vertex.numInputAttribs = 2; | ||
| vertShaderDesc.vertex.inputAttribs = vertexAttributes; | ||
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| LLGLShader shaders[2] = | ||
| { | ||
| llglCreateShader(&vertShaderDesc), | ||
| llglCreateShader(&fragShaderDesc), | ||
| }; | ||
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| for (int i = 0; i < 2; ++i) | ||
| { | ||
| LLGLReport shaderReport = llglGetShaderReport(shaders[i]); | ||
| if (llglHasReportErrors(shaderReport)) | ||
| { | ||
| fprintf(stderr, "%s\n", llglGetReportText(shaderReport)); | ||
| return 1; | ||
| } | ||
| } | ||
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| // Create graphics pipeline | ||
| LLGLGraphicsPipelineDescriptor pipelineDesc = | ||
| { | ||
| .vertexShader = shaders[0], | ||
| .fragmentShader = shaders[1], | ||
| .renderPass = llglGetRenderTargetRenderPass(LLGL_GET_AS(LLGLRenderTarget, swapChain)), | ||
| .primitiveTopology = LLGLPrimitiveTopologyTriangleList, | ||
| #if ENABLE_MULTISAMPLING | ||
| .rasterizer = { .multiSampleEnabled = (swapChainDesc.samples > 1) }, | ||
| #endif | ||
| .blend.targets[0].colorMask = LLGLColorMaskAll, | ||
| }; | ||
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| // Create graphics PSO | ||
| LLGLPipelineState pipeline = llglCreateGraphicsPipelineState(&pipelineDesc); | ||
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| // Link shader program and check for errors | ||
| LLGLReport pipelineReport = llglGetPipelineStateReport(pipeline); | ||
| if (llglHasReportErrors(pipelineReport)) | ||
| { | ||
| fprintf(stderr, "%s\n", llglGetReportText(pipelineReport)); | ||
| return 1; | ||
| } | ||
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| // Create command buffer to submit subsequent graphics commands to the GPU | ||
| LLGLCommandBufferDescriptor cmdBufferDesc = | ||
| { | ||
| .flags = LLGLCommandBufferImmediateSubmit, | ||
| .numNativeBuffers = 2, | ||
| }; | ||
| LLGLCommandBuffer cmdBuffer = llglCreateCommandBuffer(&cmdBufferDesc); | ||
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| // Initialize frame constants | ||
| const LLGLViewport viewport = | ||
| { | ||
| .x = 0.0f, | ||
| .y = 0.0f, | ||
| .width = (float)swapChainDesc.resolution.width, | ||
| .height = (float)swapChainDesc.resolution.height, | ||
| .minDepth = 0.0f, | ||
| .maxDepth = 1.0f | ||
| }; | ||
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| const LLGLClearValue clearColor = | ||
| { | ||
| .color = { 0.1f, 0.1f, 0.2f, 1.0f }, | ||
| }; | ||
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| // Enter main loop | ||
| while (llglProcessSurfaceEvents(surface)) | ||
| { | ||
| // Begin recording commands | ||
| llglBegin(cmdBuffer); | ||
| { | ||
| // Set viewport and scissor rectangle | ||
| llglSetViewport(&viewport); | ||
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| // Set vertex buffer | ||
| llglSetVertexBuffer(vertexBuffer); | ||
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| // Set the swap-chain as the initial render target | ||
| llglBeginRenderPass(LLGL_GET_AS(LLGLRenderTarget, swapChain)); | ||
| { | ||
| // Clear color buffer | ||
| llglClear(LLGLClearColor, &clearColor); | ||
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| // Set graphics pipeline | ||
| llglSetPipelineState(pipeline); | ||
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| // Draw triangle with 3 vertices | ||
| llglDraw(3, 0); | ||
| } | ||
| llglEndRenderPass(); | ||
| } | ||
| llglEnd(); | ||
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| // Present the result on the screen | ||
| llglPresent(swapChain); | ||
| } | ||
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| // Clean up | ||
| llglUnloadRenderSystem(); | ||
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| return 0; | ||
| } |
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| // GLSL shader version 1.30 (for OpenGL 3.1) | ||
| #version 130 | ||
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| in vec4 vColor; | ||
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| out vec4 outColor; | ||
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| void main() | ||
| { | ||
| outColor = vColor; | ||
| } |
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| // GLSL shader version 1.30 (for OpenGL 3.1) | ||
| #version 130 | ||
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| in vec2 position; | ||
| in vec4 color; | ||
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| out vec4 vColor; | ||
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| void main() | ||
| { | ||
| gl_Position = vec4(position, 0, 1); | ||
| vColor = color; | ||
| } |
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| @@ -0,0 +1,14 @@ | ||
| # C99 Examples | ||
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| This folder contains all LLGL examples written in the C programming language (ISO-C99). | ||
| Note that you need to set the **working directory** to `<Your-LLGL-Repository>/examples/C99/<Example>` in order to get your examples running. | ||
| For the first example, this could be `/Users/JohnDoe/LLGL/examples/C99/HelloTriangle` or `C:\Users\JohnDoe\LLGL\examples\C99\HelloTriangle` for instance. | ||
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| ## Examples | ||
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| ### [Hello Triangle](HelloTriangle) | ||
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| This example illustrates how to interact with LLGL in the C programing language. | ||
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| <p align="center"><img src="HelloTriangle/HelloTriangle.png" width="400" height="300"/></p> | ||
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| Original file line number | Diff line number | Diff line change |
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| /* | ||
| * Buffer.h | ||
| * | ||
| * Copyright (c) 2015 Lukas Hermanns. All rights reserved. | ||
| * Licensed under the terms of the BSD 3-Clause license (see LICENSE.txt). | ||
| */ | ||
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| #ifndef LLGL_C99_BUFFER_H | ||
| #define LLGL_C99_BUFFER_H | ||
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| #include <LLGL-C/Export.h> | ||
| #include <LLGL-C/Types.h> | ||
| #include <LLGL-C/BufferFlags.h> | ||
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| LLGL_C_EXPORT long llglGetBufferBindFlags(LLGLBuffer buffer); | ||
| LLGL_C_EXPORT void llglGetBufferDesc(LLGLBuffer buffer, LLGLBufferDescriptor* outDesc); | ||
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| #endif | ||
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| // ================================================================================ |
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