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修改纹理背景拉伸

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xsl
2025-09-18 18:04:54 +08:00
parent 00106ac0f6
commit baa6733872
1 changed files with 113 additions and 43 deletions
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samples/api/texture_loading/texture_loading.cpp
+113 -43
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@@ -77,48 +77,118 @@ void TextureLoading::request_gpu_features(vkb::PhysicalDevice& gpu)
}
// 生成简单的测试图像数据（红绿蓝三色条）
std::vector<uint8_t> generateSimpleTestImage(int width, int height, int* outRowStride = nullptr)
{
int rowStride = width * 4; // RGBA 每个像素4字节
if (outRowStride)
{
*outRowStride = rowStride;
void hslToRgb(float h, float s, float l, uint8_t& r, uint8_t& g, uint8_t& b) {
float c = (1 - std::abs(2 * l - 1)) * s;
float x = c * (1 - std::abs(std::fmod(h / 60.0f, 2.0f) - 1));
float m = l - c / 2.0f;
float r_, g_, b_;
if (h < 60) {
r_ = c; g_ = x; b_ = 0;
}
else if (h < 120) {
r_ = x; g_ = c; b_ = 0;
}
else if (h < 180) {
r_ = 0; g_ = c; b_ = x;
}
else if (h < 240) {
r_ = 0; g_ = x; b_ = c;
}
else if (h < 300) {
r_ = x; g_ = 0; b_ = c;
}
else {
r_ = c; g_ = 0; b_ = x;
}
size_t dataSize = rowStride * height;
std::vector<uint8_t> imageData(dataSize, 0);
r = static_cast<uint8_t>((r_ + m) * 255);
g = static_cast<uint8_t>((g_ + m) * 255);
b = static_cast<uint8_t>((b_ + m) * 255);
}
for (int y = 0; y < height; y++)
{
for (int x = 0; x < width; x++)
{
int pixelOffset = y * rowStride + x * 4;
std::vector<uint8_t> generateSimpleTestImage(int width, int height, int cell_width) {
std::vector<uint8_t> imageData(width * height * 4);
// 简单分成三个区域：红、绿、蓝
if (x < width / 3)
int gridCols = (width + cell_width - 1) / cell_width;
int gridRows = (height + cell_width - 1) / cell_width;
// 存储每个单元格的颜色
std::vector<std::vector<std::vector<uint8_t>>> cellColors(
gridRows,
std::vector<std::vector<uint8_t>>(
gridCols,
std::vector<uint8_t>(4)
)
);
// 为每个单元格生成不同的颜色
for (int gridY = 0; gridY < gridRows; ++gridY) {
for (int gridX = 0; gridX < gridCols; ++gridX) {
// 使用网格坐标生成HSL颜色
float hue = static_cast<float>(gridX + gridY * gridCols) / (gridCols * gridRows) * 360.0f;
float saturation = 0.7f + 0.3f * static_cast<float>(gridX % 2); // 交替饱和度
float lightness = 0.5f + 0.2f * static_cast<float>(gridY % 2); // 交替亮度
uint8_t r, g, b;
hslToRgb(hue, saturation, lightness, r, g, b);
cellColors[gridY][gridX][0] = r;
cellColors[gridY][gridX][1] = g;
cellColors[gridY][gridX][2] = b;
cellColors[gridY][gridX][3] = 255;
if (gridY == 0 && gridX == 0)
{
// 红色区域
imageData[pixelOffset] = 2; // R
imageData[pixelOffset + 1] = 0; // G
imageData[pixelOffset + 2] = 0; // B
}
else if (x < 2 * width / 3)
{
// 绿色区域
imageData[pixelOffset] = 0; // R
imageData[pixelOffset + 1] = 2; // G
imageData[pixelOffset + 2] = 0; // B
}
else
{
// 蓝色区域
imageData[pixelOffset] = 0; // R
imageData[pixelOffset + 1] = 0; // G
imageData[pixelOffset + 2] = 2; // B
cellColors[gridY][gridX][0] = 0;
cellColors[gridY][gridX][1] = 0;
cellColors[gridY][gridX][2] = 0;
cellColors[gridY][gridX][3] = 255;
}
imageData[pixelOffset + 3] = 255; // A (完全不透明)
if (gridY == 0 && gridX == gridCols-1)
{
cellColors[gridY][gridX][0] = 255;
cellColors[gridY][gridX][1] = 0;
cellColors[gridY][gridX][2] = 0;
cellColors[gridY][gridX][3] = 255;
}
if (gridY == gridRows-1 && gridX == 0)
{
cellColors[gridY][gridX][0] = 0;
cellColors[gridY][gridX][1] = 0;
cellColors[gridY][gridX][2] = 255;
cellColors[gridY][gridX][3] = 255;
}
if (gridY == gridRows - 1 && gridX == gridCols - 1)
{
cellColors[gridY][gridX][0] = 255;
cellColors[gridY][gridX][1] = 255;
cellColors[gridY][gridX][2] = 255;
cellColors[gridY][gridX][3] = 255;
}
}
}
// 填充像素数据
for (int y = 0; y < height; ++y) {
int gridY = y / cell_width;
for (int x = 0; x < width; ++x) {
int gridX = x / cell_width;
if (gridY < gridRows && gridX < gridCols) {
const uint8_t* color = cellColors[gridY][gridX].data();
int index = (y * width + x) * 4;
imageData[index] = color[0];
imageData[index + 1] = color[1];
imageData[index + 2] = color[2];
imageData[index + 3] = color[3];
}
}
}
@@ -502,14 +572,14 @@ void TextureLoading::build_command_buffers()
vkCmdBindPipeline(draw_cmd_buffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipelines.background);
vkCmdDraw(draw_cmd_buffers[i], 6, 1, 0, 0);
vkCmdBindDescriptorSets(draw_cmd_buffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipeline_layout, 0, 1, &descriptor_set, 0, NULL);
vkCmdBindPipeline(draw_cmd_buffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipelines.solid);
//vkCmdBindDescriptorSets(draw_cmd_buffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipeline_layout, 0, 1, &descriptor_set, 0, NULL);
//vkCmdBindPipeline(draw_cmd_buffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipelines.solid);
VkDeviceSize offsets[1] = { 0 };
vkCmdBindVertexBuffers(draw_cmd_buffers[i], 0, 1, vertex_buffer->get(), offsets);
vkCmdBindIndexBuffer(draw_cmd_buffers[i], index_buffer->get_handle(), 0, VK_INDEX_TYPE_UINT32);
//VkDeviceSize offsets[1] = { 0 };
//vkCmdBindVertexBuffers(draw_cmd_buffers[i], 0, 1, vertex_buffer->get(), offsets);
//vkCmdBindIndexBuffer(draw_cmd_buffers[i], index_buffer->get_handle(), 0, VK_INDEX_TYPE_UINT32);
vkCmdDrawIndexed(draw_cmd_buffers[i], index_count, 1, 0, 0, 0);
//vkCmdDrawIndexed(draw_cmd_buffers[i], index_count, 1, 0, 0, 0);
draw_point_cloud(draw_cmd_buffers[i]);
@@ -926,8 +996,8 @@ bool TextureLoading::prepare(const vkb::ApplicationOptions& options)
// --- 加载前景纹理 (示例) ---
int width = 640;
int height = 480;
int rowStride;
auto testImage = generateSimpleTestImage(width, height, &rowStride);
int rowStride = width*4;
auto testImage = generateSimpleTestImage(width, height, 80);
size_t dataSize = testImage.size();
std::cout << "Generated test image: " << width << "x" << height << std::endl;
std::cout << "Row stride: " << rowStride << std::endl;