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renderer/native: assert dumb buffer size on CPU copy

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Track the allocated dumb buffer size in MetaDumbBuffer. Assert that the
size is as expected in copy_shared_framebuffer_cpu().

This is just to ensure that Cogl and the real size match. The size from
Cogl was used in the copy, so getting that wrong might have written
beyond the allocation.

This is a safety measure and has not been observed to happen yet.
This commit is contained in:
Pekka Paalanen 2018-09-05 11:48:08 +03:00
parent 3e1ca62782
commit 72e236106f
1 changed files with 7 additions and 0 deletions
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7
src/backends/native/meta-renderer-native.c
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@ -124,6 +124,8 @@ typedef struct _MetaDumbBuffer
uint32_t handle;
void *map;
uint64_t map_size;
int width;
int height;
} MetaDumbBuffer;
typedef struct _MetaOnscreenNativeSecondaryGpuState
@ -1798,6 +1800,9 @@ copy_shared_framebuffer_cpu (CoglOnscreen *onscreen,
next_dumb_fb = &secondary_gpu_state->cpu.dumb_fbs[0];
secondary_gpu_state->cpu.dumb_fb = next_dumb_fb;
g_assert (width == secondary_gpu_state->cpu.dumb_fb->width);
g_assert (height == secondary_gpu_state->cpu.dumb_fb->height);
target_data = secondary_gpu_state->cpu.dumb_fb->map;
target_fb_id = secondary_gpu_state->cpu.dumb_fb->fb_id;
@ -2299,6 +2304,8 @@ init_dumb_fb (MetaDumbBuffer *dumb_fb,
dumb_fb->handle = create_arg.handle;
dumb_fb->map = map;
dumb_fb->map_size = create_arg.size;
dumb_fb->width = width;
dumb_fb->height = height;
return TRUE;