add sokol_gfx_ext.h
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1471966cd2
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6897f09e59
306
source/engine/sokol_gfx_ext.h
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306
source/engine/sokol_gfx_ext.h
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/*
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sokol_gfx_ext.h - extensions for sokol_gfx
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https://github.com/edubart/sokol_gp
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*/
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#if defined(SOKOL_IMPL) && !defined(SOKOL_GFX_EXT_IMPL)
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#define SOKOL_GFX_EXT_IMPL
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#endif
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#ifndef SOKOL_GFX_EXT_INCLUDED
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#define SOKOL_GFX_EXT_INCLUDED
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#ifndef SOKOL_GFX_INCLUDED
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#error "Please include sokol_gfx.h before sokol_gfx_ext.h"
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#endif
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#include <stdbool.h>
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#include <stdint.h>
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SOKOL_GFX_API_DECL void sg_query_image_pixels(sg_image img_id, sg_sampler smp_id, void* pixels, int size);
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SOKOL_GFX_API_DECL void sg_query_pixels(int x, int y, int w, int h, bool origin_top_left, void *pixels, int size);
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#endif // SOKOL_GFX_EXT_INCLUDED
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#ifdef SOKOL_GFX_EXT_IMPL
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#ifndef SOKOL_GFX_EXT_IMPL_INCLUDED
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#define SOKOL_GFX_EXT_IMPL_INCLUDED
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#ifndef SOKOL_GFX_IMPL_INCLUDED
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#error "Please include sokol_gfx.h implementation before sokol_gp.h implementation"
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#endif
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#if defined(_SOKOL_ANY_GL)
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static void _sg_gl_query_image_pixels(_sg_image_t* img, _sg_sampler_t *smp, void* pixels) {
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SOKOL_ASSERT(img->gl.target == GL_TEXTURE_2D);
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SOKOL_ASSERT(0 != img->gl.tex[img->cmn.active_slot]);
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#if defined(SOKOL_GLCORE33)
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_sg_gl_cache_store_texture_sampler_binding(0);
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_sg_gl_cache_bind_texture_sampler(0, img->gl.target, img->gl.tex[img->cmn.active_slot], smp->gl.smp);
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glGetTexImage(img->gl.target, 0, GL_RGBA, GL_UNSIGNED_BYTE, pixels);
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_SG_GL_CHECK_ERROR();
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_sg_gl_cache_restore_texture_sampler_binding(0);
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#else
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static GLuint newFbo = 0;
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GLuint oldFbo = 0;
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if(newFbo == 0) {
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glGenFramebuffers(1, &newFbo);
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}
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glGetIntegerv(GL_FRAMEBUFFER_BINDING, (GLint*)&oldFbo);
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glBindFramebuffer(GL_FRAMEBUFFER, newFbo);
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glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, img->gl.tex[img->cmn.active_slot], 0);
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glReadPixels(0, 0, img->cmn.width, img->cmn.height, GL_RGBA, GL_UNSIGNED_BYTE, pixels);
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glBindFramebuffer(GL_FRAMEBUFFER, oldFbo);
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//glDeleteFramebuffers(1, &newFbo);
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_SG_GL_CHECK_ERROR();
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#endif
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}
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static void _sg_gl_query_pixels(int x, int y, int w, int h, bool origin_top_left, void *pixels) {
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SOKOL_ASSERT(pixels);
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GLuint gl_fb;
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GLint dims[4];
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glGetIntegerv(GL_FRAMEBUFFER_BINDING, (GLint*)&gl_fb);
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_SG_GL_CHECK_ERROR();
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glGetIntegerv(GL_VIEWPORT, dims);
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int cur_height = dims[3];
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y = origin_top_left ? (cur_height - (y+h)) : y;
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_SG_GL_CHECK_ERROR();
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#if defined(SOKOL_GLES2) // use NV extension instead
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glReadBufferNV(gl_fb == 0 ? GL_BACK : GL_COLOR_ATTACHMENT0);
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#else
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glReadBuffer(gl_fb == 0 ? GL_BACK : GL_COLOR_ATTACHMENT0);
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#endif
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_SG_GL_CHECK_ERROR();
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glReadPixels(x, y, w, h, GL_RGBA, GL_UNSIGNED_BYTE, pixels);
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_SG_GL_CHECK_ERROR();
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}
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#elif defined(SOKOL_D3D11)
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static inline void _sgext_d3d11_Texture2D_GetDesc(ID3D11Texture2D* self, D3D11_TEXTURE2D_DESC* pDesc) {
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self->lpVtbl->GetDesc(self, pDesc);
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}
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static inline void _sgext_d3d11_SamplerState_GetDesc(ID3D11SamplerState* self, D3D11_SAMPLER_DESC* pDesc) {
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self->lpVtbl->GetDesc(self, pDesc);
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}
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static inline void _sgext_d3d11_CopySubresourceRegion(ID3D11DeviceContext* self, ID3D11Resource *pDstResource, UINT DstSubresource, UINT DstX, UINT DstY, UINT DstZ, ID3D11Resource *pSrcResource, UINT SrcSubresource, const D3D11_BOX *pSrcBox) {
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self->lpVtbl->CopySubresourceRegion(self, pDstResource, DstSubresource, DstX, DstY, DstZ, pSrcResource, SrcSubresource, pSrcBox);
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}
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static inline void _sgext_d3d11_OMGetRenderTargets(ID3D11DeviceContext* self, UINT NumViews, ID3D11RenderTargetView **ppRenderTargetViews, ID3D11DepthStencilView **ppDepthStencilView) {
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self->lpVtbl->OMGetRenderTargets(self, NumViews, ppRenderTargetViews, ppDepthStencilView);
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}
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static inline void _sgext_d3d11_RenderTargetView_GetResource(ID3D11RenderTargetView* self, ID3D11Resource** ppResource) {
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self->lpVtbl->GetResource(self, ppResource);
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}
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static void _sg_d3d11_query_image_pixels(_sg_image_t* img, void* pixels) {
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SOKOL_ASSERT(_sg.d3d11.ctx);
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SOKOL_ASSERT(img->d3d11.tex2d);
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HRESULT hr;
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_SOKOL_UNUSED(hr);
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// create staging texture
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ID3D11Texture2D* staging_tex = NULL;
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D3D11_TEXTURE2D_DESC staging_desc = {
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.Width = (UINT)img->cmn.width,
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.Height = (UINT)img->cmn.height,
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.MipLevels = 1,
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.ArraySize = 1,
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.Format = img->d3d11.format,
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.SampleDesc = {
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.Count = 1,
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.Quality = 0,
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},
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.Usage = D3D11_USAGE_STAGING,
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.BindFlags = 0,
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.CPUAccessFlags = D3D11_CPU_ACCESS_READ,
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.MiscFlags = 0
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};
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hr = _sg_d3d11_CreateTexture2D(_sg.d3d11.dev, &staging_desc, NULL, &staging_tex);
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SOKOL_ASSERT(SUCCEEDED(hr));
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// copy pixels to staging texture
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_sgext_d3d11_CopySubresourceRegion(_sg.d3d11.ctx,
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(ID3D11Resource*)staging_tex,
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0, 0, 0, 0,
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(ID3D11Resource*)img->d3d11.tex2d,
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0, NULL);
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// map the staging texture's data to CPU-accessible memory
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D3D11_MAPPED_SUBRESOURCE msr = {.pData = NULL};
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hr = _sg_d3d11_Map(_sg.d3d11.ctx, (ID3D11Resource*)staging_tex, 0, D3D11_MAP_READ, 0, &msr);
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SOKOL_ASSERT(SUCCEEDED(hr));
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memcpy(pixels, msr.pData, img->cmn.width * img->cmn.height * 4);
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// unmap the texture
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_sg_d3d11_Unmap(_sg.d3d11.ctx, (ID3D11Resource*)staging_tex, 0);
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if(staging_tex) _sg_d3d11_Release(staging_tex);
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}
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static void _sg_d3d11_query_pixels(int x, int y, int w, int h, bool origin_top_left, void *pixels) {
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// get current render target
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ID3D11RenderTargetView* render_target_view = NULL;
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_sgext_d3d11_OMGetRenderTargets(_sg.d3d11.ctx, 1, &render_target_view, NULL);
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// fallback to window render target
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if(!render_target_view)
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render_target_view = (ID3D11RenderTargetView*)_sg.d3d11.cur_pass.render_view;
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SOKOL_ASSERT(render_target_view);
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// get the back buffer texture
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ID3D11Texture2D *back_buffer = NULL;
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_sgext_d3d11_RenderTargetView_GetResource(render_target_view, (ID3D11Resource**)&back_buffer);
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SOKOL_ASSERT(back_buffer);
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// create a staging texture to copy the screen's data to
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D3D11_TEXTURE2D_DESC staging_desc;
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_sgext_d3d11_Texture2D_GetDesc(back_buffer, &staging_desc);
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staging_desc.Width = w;
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staging_desc.Height = h;
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staging_desc.BindFlags = 0;
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staging_desc.MiscFlags = 0;
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staging_desc.CPUAccessFlags = D3D11_CPU_ACCESS_READ;
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staging_desc.Usage = D3D11_USAGE_STAGING;
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ID3D11Texture2D *staging_tex = NULL;
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HRESULT hr = _sg_d3d11_CreateTexture2D(_sg.d3d11.dev, &staging_desc, NULL, &staging_tex);
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SOKOL_ASSERT(SUCCEEDED(hr));
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_SOKOL_UNUSED(hr);
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// copy the desired portion of the back buffer to the staging texture
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// y = (origin_top_left ? y : (_sg.d3d11.cur_height - (y + h)));
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D3D11_BOX src_box = {
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.left = (UINT)x,
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.top = (UINT)y,
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.front = 0,
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.right = (UINT)(x + w),
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.bottom = (UINT)(y + w),
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.back = 1,
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};
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_sgext_d3d11_CopySubresourceRegion(_sg.d3d11.ctx,
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(ID3D11Resource*)staging_tex,
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0, 0, 0, 0,
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(ID3D11Resource*)back_buffer,
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0, &src_box);
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// map the staging texture's data to CPU-accessible memory
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D3D11_MAPPED_SUBRESOURCE msr = {.pData = NULL};
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hr = _sg_d3d11_Map(_sg.d3d11.ctx, (ID3D11Resource*)staging_tex, 0, D3D11_MAP_READ, 0, &msr);
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SOKOL_ASSERT(SUCCEEDED(hr));
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memcpy(pixels, msr.pData, w * h * 4);
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// unmap the texture
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_sg_d3d11_Unmap(_sg.d3d11.ctx, (ID3D11Resource*)staging_tex, 0);
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if(back_buffer) _sg_d3d11_Release(back_buffer);
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if(staging_tex) _sg_d3d11_Release(staging_tex);
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}
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#elif defined(SOKOL_METAL)
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#ifdef TARGET_OS_IPHONE
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static void _sg_metal_commit_command_buffer(){};
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static void _sg_metal_encode_texture_pixels(int x, int y, int w, int h, bool origin_top_left, id<MTLTexture> mtl_src_texture, void* pixels) {};
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static void _sg_metal_query_image_pixels(_sg_image_t* img, void* pixels) {};
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static void _sg_metal_query_pixels(int x, int y, int w, int h, bool origin_top_left, void *pixels) {};
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#else
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#import <Metal/Metal.h>
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#import <QuartzCore/CAMetalLayer.h>
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static void _sg_metal_commit_command_buffer() {
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SOKOL_ASSERT(!_sg.mtl.in_pass);
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if(_sg.mtl.cmd_buffer) {
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#if defined(_SG_TARGET_MACOS)
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[_sg.mtl.uniform_buffers[_sg.mtl.cur_frame_rotate_index] didModifyRange:NSMakeRange(0, _sg.mtl.cur_ub_offset)];
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#endif
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[_sg.mtl.cmd_buffer commit];
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[_sg.mtl.cmd_buffer waitUntilCompleted];
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_sg.mtl.cmd_buffer = [_sg.mtl.cmd_queue commandBufferWithUnretainedReferences];
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}
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}
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static void _sg_metal_encode_texture_pixels(int x, int y, int w, int h, bool origin_top_left, id<MTLTexture> mtl_src_texture, void* pixels) {
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SOKOL_ASSERT(!_sg.mtl.in_pass);
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_sg_metal_commit_command_buffer();
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MTLTextureDescriptor* mtl_dst_texture_desc = [MTLTextureDescriptor texture2DDescriptorWithPixelFormat:mtl_src_texture.pixelFormat width:w height:h mipmapped:NO];
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mtl_dst_texture_desc.storageMode = MTLStorageModeManaged;
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mtl_dst_texture_desc.resourceOptions = MTLResourceStorageModeManaged;
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mtl_dst_texture_desc.usage = MTLTextureUsageShaderRead + MTLTextureUsageShaderWrite;
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id<MTLTexture> mtl_dst_texture = [mtl_src_texture.device newTextureWithDescriptor:mtl_dst_texture_desc];
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id<MTLCommandBuffer> cmd_buffer = [_sg.mtl.cmd_queue commandBuffer];
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id<MTLBlitCommandEncoder> blit_encoder = [cmd_buffer blitCommandEncoder];
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[blit_encoder copyFromTexture:mtl_src_texture
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sourceSlice:0
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sourceLevel:0
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sourceOrigin:MTLOriginMake(x,(origin_top_left ? y : (mtl_src_texture.height - (y + h))),0)
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sourceSize:MTLSizeMake(w,h,1)
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toTexture:mtl_dst_texture
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destinationSlice:0
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destinationLevel:0
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destinationOrigin:MTLOriginMake(0,0,0)
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];
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[blit_encoder synchronizeTexture:mtl_dst_texture slice:0 level:0];
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[blit_encoder endEncoding];
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[cmd_buffer commit];
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[cmd_buffer waitUntilCompleted];
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MTLRegion mtl_region = MTLRegionMake2D(0, 0, w, h);
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[mtl_dst_texture getBytes:pixels bytesPerRow:w * 4 fromRegion:mtl_region mipmapLevel:0];
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}
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static void _sg_metal_query_image_pixels(_sg_image_t* img, void* pixels) {
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id<MTLTexture> mtl_src_texture = _sg.mtl.idpool.pool[img->mtl.tex[0]];
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_sg_metal_encode_texture_pixels(0, 0, mtl_src_texture.width, mtl_src_texture.height, true, mtl_src_texture, pixels);
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}
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static void _sg_metal_query_pixels(int x, int y, int w, int h, bool origin_top_left, void *pixels) {
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id<CAMetalDrawable> mtl_drawable = (__bridge id<CAMetalDrawable>)_sg.mtl.drawable_cb();
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_sg_metal_encode_texture_pixels(x, y, w, h, origin_top_left, mtl_drawable.texture, pixels);
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}
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#endif
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#endif
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void sg_query_image_pixels(sg_image img_id, sg_sampler smp_id, void* pixels, int size) {
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SOKOL_ASSERT(pixels);
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SOKOL_ASSERT(img_id.id != SG_INVALID_ID);
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_sg_image_t* img = _sg_lookup_image(&_sg.pools, img_id.id);
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_sg_sampler_t *smp = _sg_lookup_sampler(&_sg.pools, smp_id.id);
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SOKOL_ASSERT(img);
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SOKOL_ASSERT(size >= (img->cmn.width * img->cmn.height * 4));
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_SOKOL_UNUSED(size);
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#if defined(_SOKOL_ANY_GL)
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_sg_gl_query_image_pixels(img, smp, pixels);
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#elif defined(SOKOL_D3D11)
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_sg_d3d11_query_image_pixels(img, pixels);
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#elif defined(SOKOL_METAL)
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_sg_metal_query_image_pixels(img, pixels);
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#endif
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}
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void sg_query_pixels(int x, int y, int w, int h, bool origin_top_left, void *pixels, int size) {
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SOKOL_ASSERT(pixels);
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SOKOL_ASSERT(size >= w*h);
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_SOKOL_UNUSED(size);
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#if defined(_SOKOL_ANY_GL)
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_sg_gl_query_pixels(x, y, w, h, origin_top_left, pixels);
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#elif defined(SOKOL_D3D11)
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_sg_d3d11_query_pixels(x, y, w, h, origin_top_left, pixels);
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#elif defined(SOKOL_METAL)
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_sg_metal_query_pixels(x, y, w, h, origin_top_left, pixels);
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#endif
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}
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#endif // SOKOL_GFX_EXT_IMPL_INCLUDED
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#endif // SOKOL_GFX_EXT_IMPL
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