Add FPDF_RenderPageBitmapWithMatrix API.
BUG=pdfium:522
Review-Url: https://codereview.chromium.org/2526473002
diff --git a/fpdfsdk/fpdfview_embeddertest.cpp b/fpdfsdk/fpdfview_embeddertest.cpp
index 65e52fe..1d94b72 100644
--- a/fpdfsdk/fpdfview_embeddertest.cpp
+++ b/fpdfsdk/fpdfview_embeddertest.cpp
@@ -327,3 +327,54 @@
TEST_F(FPDFViewEmbeddertest, Hang_360) {
EXPECT_FALSE(OpenDocument("bug_360.pdf"));
}
+
+TEST_F(FPDFViewEmbeddertest, FPDF_RenderPageBitmapWithMatrix) {
+ const char kAllBlackMd5sum[] = "5708fc5c4a8bd0abde99c8e8f0390615";
+ const char kTopLeftQuarterBlackMd5sum[] = "24e4d1ec06fa0258af758cfc8b2ad50a";
+
+ EXPECT_TRUE(OpenDocument("black.pdf"));
+ FPDF_PAGE page = LoadPage(0);
+ EXPECT_NE(nullptr, page);
+ const int width = static_cast<int>(FPDF_GetPageWidth(page));
+ const int height = static_cast<int>(FPDF_GetPageHeight(page));
+ EXPECT_EQ(612, width);
+ EXPECT_EQ(792, height);
+
+ FPDF_BITMAP bitmap = RenderPage(page);
+ CompareBitmap(bitmap, width, height, kAllBlackMd5sum);
+ FPDFBitmap_Destroy(bitmap);
+
+ // Try rendering with an identity matrix. The output should be the same as
+ // the RenderPage() output.
+ FS_MATRIX matrix;
+ matrix.a = 1;
+ matrix.b = 0;
+ matrix.c = 0;
+ matrix.d = 1;
+ matrix.e = 0;
+ matrix.f = 0;
+
+ FS_RECTF rect;
+ rect.left = 0;
+ rect.top = 0;
+ rect.right = width;
+ rect.bottom = height;
+
+ bitmap = FPDFBitmap_Create(width, height, 0);
+ FPDFBitmap_FillRect(bitmap, 0, 0, width, height, 0xFFFFFFFF);
+ FPDF_RenderPageBitmapWithMatrix(bitmap, page, &matrix, &rect, 0);
+ CompareBitmap(bitmap, width, height, kAllBlackMd5sum);
+ FPDFBitmap_Destroy(bitmap);
+
+ // Now render again with the image scaled.
+ matrix.a = 0.5;
+ matrix.d = 0.5;
+
+ bitmap = FPDFBitmap_Create(width, height, 0);
+ FPDFBitmap_FillRect(bitmap, 0, 0, width, height, 0xFFFFFFFF);
+ FPDF_RenderPageBitmapWithMatrix(bitmap, page, &matrix, &rect, 0);
+ CompareBitmap(bitmap, width, height, kTopLeftQuarterBlackMd5sum);
+ FPDFBitmap_Destroy(bitmap);
+
+ UnloadPage(page);
+}