Stride adjust in place (#5423)

Signed-off-by: Xu Xingliang <xuxingliang@xiaomi.com>
2024-02-06 17:53:14 +08:00
parent 812e98aa8b
commit ad81f1f8cc
4 changed files with 123 additions and 26 deletions
--- a/tests/src/test_cases/test_draw_buf_stride.c
+++ b/tests/src/test_cases/test_draw_buf_stride.c
@@ -0,0 +1,74 @@
+#if LV_BUILD_TEST
+#include "../lvgl.h"
+
+#include "unity/unity.h"
+#include "lv_test_helpers.h"
+
+void setUp(void)
+{
+    /* Function run before every test */
+}
+
+void tearDown(void)
+{
+    /* Function run after every test */
+}
+
+void test_draw_buf_stride_adjust(void)
+{
+#if LV_BIN_DECODER_RAM_LOAD == 1
+    const char * img_src = "A:test_images/stride_align64/UNCOMPRESSED/test_ARGB8888.bin";
+    lv_obj_t * img = lv_image_create(lv_screen_active());
+    lv_obj_center(img);
+    lv_image_set_src(img, img_src);
+    TEST_ASSERT_EQUAL_SCREENSHOT("draw/temp.o"); /*Generate the reference image, use .o so git ignore it*/
+
+    lv_image_decoder_args_t args = {
+        .no_cache = false,
+        .premultiply = false,
+        .stride_align = false,
+        .use_indexed = false,
+    };
+
+    lv_image_decoder_dsc_t decoder_dsc;
+    lv_result_t res = lv_image_decoder_open(&decoder_dsc, img_src, &args);
+    TEST_ASSERT_EQUAL(LV_RESULT_OK, res);
+
+    const lv_image_header_t header = decoder_dsc.decoded->header;
+    /*The test image must have aligned stride different with width * bpp*/
+    TEST_ASSERT_NOT_EQUAL(header.w * 4, header.stride);
+
+    lv_draw_buf_t * dup = lv_draw_buf_dup(decoder_dsc.decoded);
+    TEST_ASSERT_NOT_NULL(dup);
+
+    /*Close the decoder since we copied out the decoded draw buffer*/
+    lv_image_decoder_close(&decoder_dsc);
+
+    /* Shrink stride to below minimal stride(by -1 in code below) should fail */
+    res = lv_draw_buf_adjust_stride(dup, header.w * 4 - 1);
+    TEST_ASSERT_EQUAL(LV_RESULT_INVALID, res);
+
+    res = lv_draw_buf_adjust_stride(dup, header.stride + 1);
+    TEST_ASSERT_EQUAL(LV_RESULT_INVALID, res);
+
+    /*Expand the stride should fail if stride is too large that buffer size overflow*/
+    res = lv_draw_buf_adjust_stride(dup, header.stride + 1);
+    TEST_ASSERT_EQUAL(LV_RESULT_INVALID, res);
+
+    /* Expand the stride should work, use a proper stride value should succeed*/
+    res = lv_draw_buf_adjust_stride(dup, (header.stride + header.w * 4) / 2);
+    TEST_ASSERT_EQUAL(LV_RESULT_OK, res);
+    lv_image_set_src(img, dup);
+    TEST_ASSERT_EQUAL_SCREENSHOT("draw/temp.o"); /*The image should still looks same*/
+
+    /* Shrink stride to minimal stride should succeed */
+    res = lv_draw_buf_adjust_stride(dup, header.w * 4);
+    TEST_ASSERT_EQUAL(LV_RESULT_OK, res);
+    lv_image_set_src(img, dup);
+    TEST_ASSERT_EQUAL_SCREENSHOT("draw/temp.o"); /*Test against with above reference image*/
+
+    lv_draw_buf_destroy(dup);
+#endif
+}
+
+#endif