mirrors/bgfx
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Add blitting fallback for OGL (#2269)

Browse Source 
Co-authored-by: Christophe Dehais <christophe.dehais@fittingbox.com>
This commit is contained in:
Christophe Dehais 2020-09-28 18:53:37 +02:00 committed by GitHub
parent 27f4a2ee47
commit 816026a8bf
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
3 changed files with 66 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
src/glimports.h
View File

@ -73,6 +73,7 @@ typedef void (GL_APIENTRYP PFNGLCOMPRESSEDTEXIMAGE3DPROC) (GLenum targ
typedef void (GL_APIENTRYP PFNGLCOMPRESSEDTEXSUBIMAGE2DPROC) (GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLsizei imageSize, const void *data);
typedef void (GL_APIENTRYP PFNGLCOMPRESSEDTEXSUBIMAGE3DPROC) (GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLsizei imageSize, const void *data);
typedef void (GL_APIENTRYP PFNGLCOPYIMAGESUBDATAPROC) (GLuint srcName, GLenum srcTarget, GLint srcLevel, GLint srcX, GLint srcY, GLint srcZ, GLuint dstName, GLenum dstTarget, GLint dstLevel, GLint dstX, GLint dstY, GLint dstZ, GLsizei srcWidth, GLsizei srcHeight, GLsizei srcDepth);
typedef void (GL_APIENTRYP PFNGLCOPYTEXSUBIMAGE2DPROC) (GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint x, GLint y, GLsizei width, GLsizei height);
typedef GLuint (GL_APIENTRYP PFNGLCREATEPROGRAMPROC) (void);
typedef GLuint (GL_APIENTRYP PFNGLCREATESHADERPROC) (GLenum type);
typedef void (GL_APIENTRYP PFNGLCULLFACEPROC) (GLenum mode);
@ -266,6 +267,7 @@ GL_IMPORT______(false, PFNGLCOMPRESSEDTEXSUBIMAGE2DPROC, glCompressedT
GL_IMPORT______(true , PFNGLCOMPRESSEDTEXIMAGE3DPROC, glCompressedTexImage3D);
GL_IMPORT______(true , PFNGLCOMPRESSEDTEXSUBIMAGE3DPROC, glCompressedTexSubImage3D);
GL_IMPORT______(true , PFNGLCOPYIMAGESUBDATAPROC, glCopyImageSubData);
GL_IMPORT______(true , PFNGLCOPYTEXSUBIMAGE2DPROC, glCopyTexSubImage2D);
GL_IMPORT______(false, PFNGLCREATEPROGRAMPROC, glCreateProgram);
GL_IMPORT______(false, PFNGLCREATESHADERPROC, glCreateShader);
GL_IMPORT______(false, PFNGLCULLFACEPROC, glCullFace);

65
src/renderer_gl.cpp
View File

@ -2747,13 +2747,14 @@ namespace bgfx { namespace gl
|| s_extension[Extension:: NV_copy_image].m_supported
|| s_extension[Extension::OES_copy_image].m_supported)
{
m_blitSupported = NULL != glCopyImageSubData;
g_caps.supported |= m_blitSupported
? BGFX_CAPS_TEXTURE_BLIT
: 0
;
m_blitSupported = NULL != glCopyImageSubData;
}
g_caps.supported |= m_blitSupported || BX_ENABLED(BGFX_GL_CONFIG_BLIT_EMULATION)
? BGFX_CAPS_TEXTURE_BLIT
: 0
;
g_caps.supported |= m_readBackSupported
? BGFX_CAPS_TEXTURE_READ_BACK
: 0
@ -6991,6 +6992,60 @@ namespace bgfx { namespace gl
, height
, bx::uint32_imax(depth, 1)
) );
}
}
else if (BX_ENABLED(BGFX_GL_CONFIG_BLIT_EMULATION) )
{
while (_bs.hasItem(_view) )
{
const BlitItem& bi = _bs.advance();
const TextureGL& src = m_textures[bi.m_src.idx];
const TextureGL& dst = m_textures[bi.m_dst.idx];
uint32_t srcWidth = bx::uint32_min(src.m_width, bi.m_srcX + bi.m_width) - bi.m_srcX;
uint32_t srcHeight = bx::uint32_min(src.m_height, bi.m_srcY + bi.m_height) - bi.m_srcY;
uint32_t dstWidth = bx::uint32_min(dst.m_width, bi.m_dstX + bi.m_width) - bi.m_dstX;
uint32_t dstHeight = bx::uint32_min(dst.m_height, bi.m_dstY + bi.m_height) - bi.m_dstY;
uint32_t dstDepth = bx::uint32_min(dst.m_depth, bi.m_dstZ + bi.m_depth) - bi.m_dstZ;
uint32_t width = bx::uint32_min(srcWidth, dstWidth);
uint32_t height = bx::uint32_min(srcHeight, dstHeight);
BX_ASSERT((bi.m_srcZ == 0) && (bi.m_dstZ == 0) && (bi.m_depth == 0)
, "Blitting 3D regions is not supported"
);
GLuint fbo;
GL_CHECK(glGenFramebuffers(1, &fbo) );
GL_CHECK(glBindFramebuffer(GL_FRAMEBUFFER, fbo) );
GL_CHECK(glFramebufferTexture2D(GL_FRAMEBUFFER
, GL_COLOR_ATTACHMENT0
, GL_TEXTURE_2D
, src.m_id
, bi.m_srcMip
) );
BX_ASSERT(GL_FRAMEBUFFER_COMPLETE == glCheckFramebufferStatus(GL_FRAMEBUFFER)
, "glCheckFramebufferStatus failed 0x%08x"
, glCheckFramebufferStatus(GL_FRAMEBUFFER)
);
GL_CHECK(glActiveTexture(GL_TEXTURE0) );
GL_CHECK(glBindTexture(GL_TEXTURE_2D, dst.m_id) );
GL_CHECK(glCopyTexSubImage2D(GL_TEXTURE_2D
, bi.m_dstMip
, bi.m_dstX
, bi.m_dstY
, bi.m_srcX
, bi.m_srcY
, width
, height) );
GL_CHECK(glDeleteFramebuffers(1, &fbo) );
GL_CHECK(glBindFramebuffer(GL_FRAMEBUFFER, 0) );
}
}
}

4
src/renderer_gl.h
View File

@ -36,6 +36,10 @@
// on the following platforms.
#define BGFX_GL_CONFIG_UNIFORM_CACHE BX_PLATFORM_EMSCRIPTEN
#ifndef BGFX_GL_CONFIG_BLIT_EMULATION
# define BGFX_GL_CONFIG_BLIT_EMULATION 0
#endif // BGFX_GL_CONFIG_BLIT_EMULATION
#define BGFX_GL_PROFILER_BEGIN(_view, _abgr) \
BX_MACRO_BLOCK_BEGIN \
GL_CHECK(glPushDebugGroup(GL_DEBUG_SOURCE_APPLICATION, 0, -1, s_viewName[view]) ); \