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vk/test: Do a copy of the RT into a linear buffer and write that to a PNG

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This commit is contained in:
Jason Ekstrand 2015-05-13 22:18:37 -07:00
parent bd5b76d6d0
commit 4fb8bddc58
1 changed files with 42 additions and 2 deletions
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44
src/vulkan/vk.c
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@ -397,14 +397,33 @@ int main(int argc, char *argv[])
VK_OBJECT_INFO_TYPE_MEMORY_REQUIREMENTS,
&size, &vb_requirements);
VkBuffer image_buffer;
vkCreateBuffer(device,
&(VkBufferCreateInfo) {
.sType = VK_STRUCTURE_TYPE_BUFFER_CREATE_INFO,
.size = width * height * 4,
.usage = VK_BUFFER_USAGE_TRANSFER_DESTINATION_BIT,
.flags = 0
},
&image_buffer);
VkMemoryRequirements ib_requirements;
size = sizeof(ib_requirements);
vkGetObjectInfo(device, VK_OBJECT_TYPE_BUFFER, image_buffer,
VK_OBJECT_INFO_TYPE_MEMORY_REQUIREMENTS,
&size, &ib_requirements);
printf("buffer size: %lu, buffer alignment: %lu\n",
buffer_requirements.size, buffer_requirements.alignment);
printf("rt size: %lu, rt alignment: %lu\n",
rt_requirements.size, rt_requirements.alignment);
printf("vb size: %lu vb alignment: %lu\n",
vb_requirements.size, vb_requirements.alignment);
printf("ib size: %lu ib alignment: %lu\n",
ib_requirements.size, ib_requirements.alignment);
size_t mem_size = rt_requirements.size + 2048 + 16 * 16 * 4;
size_t mem_size = rt_requirements.size + ib_requirements.size +
2048 + 16 * 16 * 4;
VkDeviceMemory mem;
vkAllocMemory(device,
&(VkMemoryAllocInfo) {
@ -521,6 +540,11 @@ int main(int argc, char *argv[])
0, /* allocation index; for objects which need to bind to multiple mems */
mem, 2048);
vkQueueBindObjectMemory(queue, VK_OBJECT_TYPE_BUFFER,
image_buffer,
0, /* allocation index; for objects which need to bind to multiple mems */
mem, 2048 + rt_requirements.size);
const uint32_t texture_width = 16, texture_height = 16;
VkImage texture;
vkCreateImage(device,
@ -732,13 +756,29 @@ int main(int argc, char *argv[])
vkCmdEndRenderPass(cmdBuffer, pass);
VkBufferImageCopy copy = {
.bufferOffset = 0,
.imageSubresource = {
.aspect = VK_IMAGE_ASPECT_COLOR,
.mipLevel = 0,
.arraySlice = 0,
},
.imageOffset = { .x = 0, .y = 0, .z = 0 },
.imageExtent = { .width = width, .height = height, .depth = 1 },
};
vkCmdCopyImageToBuffer(cmdBuffer, rt, VK_IMAGE_LAYOUT_GENERAL,
image_buffer, 1, &copy);
vkEndCommandBuffer(cmdBuffer);
vkQueueSubmit(queue, 1, &cmdBuffer, 0);
vkQueueWaitIdle(queue);
write_png("vk.png", width, height, 1024, map + 2048);
write_png("vk-map.png", width, height, 1024, map + 2048);
write_png("vk-copy.png", width, height, 1024,
map + 2048 + rt_requirements.size);
vkDestroyObject(device, VK_OBJECT_TYPE_IMAGE, texture);
vkDestroyObject(device, VK_OBJECT_TYPE_IMAGE, rt);