bgfx/examples/common/nanovg/nanovg_bgfx.h
Olli Wang b761d1240c Allows to set view id of NanoVG’s framebuffer manually.
This commit changes the `nvgluCreateFramebuffer()` function to not assign a view id automatically as it would easily reach the limit of `uint8_t`. Instead, a new `nvgluSetViewFramebuffer()` function is created to allow users to assign the view id manually as mentioned in #1095.
2017-03-26 11:03:52 +08:00

55 lines
1.8 KiB
C++

/*
* Copyright 2011-2017 Branimir Karadzic. All rights reserved.
* License: https://github.com/bkaradzic/bgfx#license-bsd-2-clause
*/
#ifndef NANOVG_BGFX_H_HEADER_GUARD
#define NANOVG_BGFX_H_HEADER_GUARD
#include "bgfx/bgfx.h"
namespace bx { struct AllocatorI; }
struct NVGcontext;
struct NVGLUframebuffer {
NVGcontext* ctx;
bgfx::FrameBufferHandle handle;
int image;
uint8_t viewId;
};
typedef struct NVGLUframebuffer NVGLUframebuffer;
NVGcontext* nvgCreate(int edgeaa, unsigned char _viewId, bx::AllocatorI* _allocator);
NVGcontext* nvgCreate(int edgeaa, unsigned char _viewId);
void nvgDelete(struct NVGcontext* ctx);
uint8_t nvgViewId(struct NVGcontext* ctx);
void nvgViewId(struct NVGcontext* ctx, unsigned char _viewId);
// Helper functions to create bgfx framebuffer to render to.
// Example:
// float scale = 2;
// NVGLUframebuffer* fb = nvgluCreateFramebuffer(ctx, 100 * scale, 100 * scale, 0);
// nvgluSetViewFramebuffer(VIEW_ID, fb);
// nvgluBindFramebuffer(fb);
// nvgBeginFrame(ctx, 100, 100, scale);
// // renders anything offscreen
// nvgEndFrame(ctx);
// nvgluBindFramebuffer(NULL);
//
// // Pastes the framebuffer rendering.
// nvgBeginFrame(ctx, 1024, 768, scale);
// NVGpaint paint = nvgImagePattern(ctx, 0, 0, 100, 100, 0, fb->image, 1);
// nvgBeginPath(ctx);
// nvgRect(ctx, 0, 0, 100, 100);
// nvgFillPaint(ctx, paint);
// nvgFill(ctx);
// nvgEndFrame(ctx);
NVGLUframebuffer* nvgluCreateFramebuffer(NVGcontext* ctx, int width, int height, int imageFlags, uint8_t viewId);
NVGLUframebuffer* nvgluCreateFramebuffer(NVGcontext* ctx, int width, int height, int imageFlags);
void nvgluBindFramebuffer(NVGLUframebuffer* framebuffer);
void nvgluDeleteFramebuffer(NVGLUframebuffer* framebuffer);
void nvgluSetViewFramebuffer(uint8_t viewId, NVGLUframebuffer* framebuffer);
#endif // NANOVG_BGFX_H_HEADER_GUARD