diff options
| -rw-r--r-- | src/mesa/drivers/common/meta_blit.c | 24 |
1 files changed, 13 insertions, 11 deletions
diff --git a/src/mesa/drivers/common/meta_blit.c b/src/mesa/drivers/common/meta_blit.c index 3cd06a5f527..770bc4178a2 100644 --- a/src/mesa/drivers/common/meta_blit.c +++ b/src/mesa/drivers/common/meta_blit.c @@ -70,26 +70,28 @@ setup_glsl_msaa_blit_shader(struct gl_context *ctx, const char *sampler_array_suffix = ""; char *name; const char *texcoord_type = "vec2"; - const int samples = MAX2(src_rb->NumSamples, 1); + int samples; int shader_offset = 0; - /* We expect only power of 2 samples in source multisample buffer. */ - assert((samples & (samples - 1)) == 0); - while (samples >> (shader_offset + 1)) { - shader_offset++; - } - /* Update the assert if we plan to support more than 16X MSAA. */ - assert(shader_offset >= 0 && shader_offset <= 4); - if (src_rb) { + samples = MAX2(src_rb->NumSamples, 1); src_datatype = _mesa_get_format_datatype(src_rb->Format); } else { /* depth-or-color glCopyTexImage fallback path that passes a NULL rb and * doesn't handle integer. */ + samples = 1; src_datatype = GL_UNSIGNED_NORMALIZED; } + /* We expect only power of 2 samples in source multisample buffer. */ + assert((samples & (samples - 1)) == 0); + while (samples >> (shader_offset + 1)) { + shader_offset++; + } + /* Update the assert if we plan to support more than 16X MSAA. */ + assert(shader_offset >= 0 && shader_offset <= 4); + if (ctx->DrawBuffer->Visual.samples > 1) { /* If you're calling meta_BlitFramebuffer with the destination * multisampled, this is the only path that will work -- swrast and @@ -108,8 +110,8 @@ setup_glsl_msaa_blit_shader(struct gl_context *ctx, switch (target) { case GL_TEXTURE_2D_MULTISAMPLE: case GL_TEXTURE_2D_MULTISAMPLE_ARRAY: - if (src_rb->_BaseFormat == GL_DEPTH_COMPONENT || - src_rb->_BaseFormat == GL_DEPTH_STENCIL) { + if (src_rb && (src_rb->_BaseFormat == GL_DEPTH_COMPONENT || + src_rb->_BaseFormat == GL_DEPTH_STENCIL)) { if (dst_is_msaa) shader_index = BLIT_MSAA_SHADER_2D_MULTISAMPLE_DEPTH_COPY; else |