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-rw-r--r--libs/hwui/Patch.cpp167
1 files changed, 70 insertions, 97 deletions
diff --git a/libs/hwui/Patch.cpp b/libs/hwui/Patch.cpp
index 4b6bb37..a660730 100644
--- a/libs/hwui/Patch.cpp
+++ b/libs/hwui/Patch.cpp
@@ -17,6 +17,7 @@
#define LOG_TAG "OpenGLRenderer"
#include <cstring>
+#include <cmath>
#include <utils/Log.h>
@@ -29,38 +30,14 @@ namespace uirenderer {
// Constructors/destructor
///////////////////////////////////////////////////////////////////////////////
-Patch::Patch(const uint32_t xCount, const uint32_t yCount):
- xCount(xCount + 2), yCount(yCount + 2) {
- verticesCount = (xCount + 2) * (yCount + 2);
- vertices = new TextureVertex[verticesCount];
-
+Patch::Patch(const uint32_t xCount, const uint32_t yCount) {
// 2 triangles per patch, 3 vertices per triangle
- indicesCount = (xCount + 1) * (yCount + 1) * 2 * 3;
- indices = new uint16_t[indicesCount];
-
- const uint32_t xNum = xCount + 1;
- const uint32_t yNum = yCount + 1;
-
- uint16_t* startIndices = indices;
- uint32_t n = 0;
- for (uint32_t y = 0; y < yNum; y++) {
- for (uint32_t x = 0; x < xNum; x++) {
- *startIndices++ = n;
- *startIndices++ = n + 1;
- *startIndices++ = n + xNum + 2;
-
- *startIndices++ = n;
- *startIndices++ = n + xNum + 2;
- *startIndices++ = n + xNum + 1;
-
- n += 1;
- }
- n += 1;
- }
+ verticesCount = (xCount + 1) * (yCount + 1) * 2 * 3;
+ vertices = new TextureVertex[verticesCount];
+ memset(vertices, 0, sizeof(TextureVertex) * verticesCount);
}
Patch::~Patch() {
- delete indices;
delete vertices;
}
@@ -69,15 +46,13 @@ Patch::~Patch() {
///////////////////////////////////////////////////////////////////////////////
void Patch::updateVertices(const SkBitmap* bitmap, float left, float top, float right,
- float bottom, const int32_t* xDivs, const int32_t* yDivs, const uint32_t width,
+ float bottom, const int32_t* xDivs, const int32_t* yDivs, const uint32_t width,
const uint32_t height) {
const uint32_t xStretchCount = (width + 1) >> 1;
const uint32_t yStretchCount = (height + 1) >> 1;
- float xStretch = 0;
- float yStretch = 0;
- float xStretchTex = 0;
- float yStretchTex = 0;
+ float stretchX = 0.0f;
+ float stretchY = 0.0;
const float meshWidth = right - left;
@@ -89,9 +64,10 @@ void Patch::updateVertices(const SkBitmap* bitmap, float left, float top, float
for (uint32_t i = 1; i < width; i += 2) {
stretchSize += xDivs[i] - xDivs[i - 1];
}
- xStretchTex = (stretchSize / bitmapWidth) / xStretchCount;
+ const float xStretchTex = stretchSize;
const float fixed = bitmapWidth - stretchSize;
- xStretch = (right - left - fixed) / xStretchCount;
+ const float xStretch = right - left - fixed;
+ stretchX = xStretch / xStretchTex;
}
if (yStretchCount > 0) {
@@ -99,89 +75,86 @@ void Patch::updateVertices(const SkBitmap* bitmap, float left, float top, float
for (uint32_t i = 1; i < height; i += 2) {
stretchSize += yDivs[i] - yDivs[i - 1];
}
- yStretchTex = (stretchSize / bitmapHeight) / yStretchCount;
+ const float yStretchTex = stretchSize;
const float fixed = bitmapHeight - stretchSize;
- yStretch = (bottom - top - fixed) / yStretchCount;
+ const float yStretch = bottom - top - fixed;
+ stretchY = yStretch / yStretchTex;
}
- float vy = 0.0f;
- float ty = 0.0f;
TextureVertex* vertex = vertices;
- generateVertices(vertex, 0.0f, 0.0f, xDivs, width, xStretch, xStretchTex,
- meshWidth, bitmapWidth);
- vertex += width + 2;
+ float previousStepY = 0.0f;
- for (uint32_t y = 0; y < height; y++) {
- if (y & 1) {
- vy += yStretch;
- ty += yStretchTex;
+ float y1 = 0.0f;
+ float v1 = 0.0f;
+
+ for (uint32_t i = 0; i < height; i++) {
+ float stepY = yDivs[i];
+
+ float y2 = 0.0f;
+ if (i & 1) {
+ const float segment = stepY - previousStepY;
+ y2 = y1 + segment * stretchY;
} else {
- const float step = float(yDivs[y]);
- vy += step;
- ty += step / bitmapHeight;
+ y2 = y1 + stepY - previousStepY;
}
- generateVertices(vertex, vy, ty, xDivs, width, xStretch, xStretchTex,
- meshWidth, bitmapWidth);
- vertex += width + 2;
+ float v2 = fmax(0.0f, stepY - 0.5f) / bitmapHeight;
+
+ generateRow(vertex, y1, y2, v1, v2, xDivs, width, stretchX,
+ right - left, bitmapWidth);
+
+ y1 = y2;
+ v1 = (stepY + 0.5f) / bitmapHeight;
+
+ previousStepY = stepY;
}
- generateVertices(vertex, bottom - top, 1.0f, xDivs, width, xStretch, xStretchTex,
- meshWidth, bitmapWidth);
+ generateRow(vertex, y1, bottom - top, v1, 1.0f, xDivs, width, stretchX,
+ right - left, bitmapWidth);
}
-inline void Patch::generateVertices(TextureVertex* vertex, float y, float v,
- const int32_t xDivs[], uint32_t xCount, float xStretch, float xStretchTex,
- float width, float widthTex) {
- float vx = 0.0f;
- float tx = 0.0f;
+inline void Patch::generateRow(TextureVertex*& vertex, float y1, float y2, float v1, float v2,
+ const int32_t xDivs[], uint32_t xCount, float stretchX, float width, float bitmapWidth) {
+ float previousStepX = 0.0f;
+
+ float x1 = 0.0f;
+ float u1 = 0.0f;
- TextureVertex::set(vertex, vx, y, tx, v);
- vertex++;
+ // Generate the row quad by quad
+ for (uint32_t i = 0; i < xCount; i++) {
+ float stepX = xDivs[i];
- for (uint32_t x = 0; x < xCount; x++) {
- if (x & 1) {
- vx += xStretch;
- tx += xStretchTex;
+ float x2 = 0.0f;
+ if (i & 1) {
+ const float segment = stepX - previousStepX;
+ x2 = x1 + segment * stretchX;
} else {
- const float step = float(xDivs[x]);
- vx += step;
- tx += step / widthTex;
+ x2 = x1 + stepX - previousStepX;
}
+ float u2 = fmax(0.0f, stepX - 0.5f) / bitmapWidth;
- TextureVertex::set(vertex, vx, y, tx, v);
- vertex++;
+ generateQuad(vertex, x1, y1, x2, y2, u1, v1, u2, v2);
+
+ x1 = x2;
+ u1 = (stepX + 0.5f) / bitmapWidth;
+
+ previousStepX = stepX;
}
- TextureVertex::set(vertex, width, y, 1.0f, v);
- vertex++;
+ generateQuad(vertex, x1, y1, width, y2, u1, v1, 1.0f, v2);
}
-///////////////////////////////////////////////////////////////////////////////
-// Debug tools
-///////////////////////////////////////////////////////////////////////////////
-
-void Patch::dump() {
- LOGD("Vertices [");
- for (uint32_t y = 0; y < yCount; y++) {
- char buffer[512];
- buffer[0] = '\0';
- uint32_t offset = 0;
- for (uint32_t x = 0; x < xCount; x++) {
- TextureVertex* v = &vertices[y * xCount + x];
- offset += sprintf(&buffer[offset], " (%.4f,%.4f)-(%.4f,%.4f)",
- v->position[0], v->position[1], v->texture[0], v->texture[1]);
- }
- LOGD(" [%s ]", buffer);
- }
- LOGD("]\nIndices [ ");
- char buffer[4096];
- buffer[0] = '\0';
- uint32_t offset = 0;
- for (uint32_t i = 0; i < indicesCount; i++) {
- offset += sprintf(&buffer[offset], "%d ", indices[i]);
- }
- LOGD(" %s\n]", buffer);
+inline void Patch::generateQuad(TextureVertex*& vertex, float x1, float y1, float x2, float y2,
+ float u1, float v1, float u2, float v2) {
+ // Left triangle
+ TextureVertex::set(vertex++, x1, y1, u1, v1);
+ TextureVertex::set(vertex++, x2, y1, u2, v1);
+ TextureVertex::set(vertex++, x1, y2, u1, v2);
+
+ // Right triangle
+ TextureVertex::set(vertex++, x1, y2, u1, v2);
+ TextureVertex::set(vertex++, x2, y1, u2, v1);
+ TextureVertex::set(vertex++, x2, y2, u2, v2);
}
}; // namespace uirenderer
generated by cgit v1.1 at 2025-11-27 14:02:05 +0000