Merge pull request #9 from glyptodon/rdp-aspect-ratio
GUAC-947: Maintain aspect ratio when size is adjusted.
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82e26aaca2
@ -67,29 +67,61 @@ void guac_rdp_disp_connect(guac_rdp_disp* guac_disp, DispClientContext* disp) {
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guac_disp->disp = disp;
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}
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/**
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* Fits a given dimension within the allowed bounds for Display Update
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* messages, adjusting the other dimension such that aspect ratio is
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* maintained.
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*
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* @param a The dimension to fit within allowed bounds.
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*
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* @param b
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* The other dimension to adjust if and only if necessary to preserve
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* aspect ratio.
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*/
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static void guac_rdp_disp_fit(int* a, int* b) {
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int a_value = *a;
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int b_value = *b;
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/* Ensure first dimension is within allowed range */
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if (a_value < GUAC_RDP_DISP_MIN_SIZE) {
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/* Adjust other dimension to maintain aspect ratio */
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int adjusted_b = b_value * GUAC_RDP_DISP_MIN_SIZE / a_value;
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if (adjusted_b > GUAC_RDP_DISP_MAX_SIZE)
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adjusted_b = GUAC_RDP_DISP_MAX_SIZE;
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*a = GUAC_RDP_DISP_MIN_SIZE;
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*b = adjusted_b;
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}
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else if (a_value > GUAC_RDP_DISP_MAX_SIZE) {
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/* Adjust other dimension to maintain aspect ratio */
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int adjusted_b = b_value * GUAC_RDP_DISP_MAX_SIZE / a_value;
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if (adjusted_b < GUAC_RDP_DISP_MIN_SIZE)
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adjusted_b = GUAC_RDP_DISP_MIN_SIZE;
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*a = GUAC_RDP_DISP_MAX_SIZE;
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*b = adjusted_b;
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}
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}
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void guac_rdp_disp_set_size(guac_rdp_disp* disp, rdpContext* context,
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int width, int height) {
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/* Width must be at least 200 pixels */
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if (width < 200)
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width = 200;
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/* Fit width within bounds, adjusting height to maintain aspect ratio */
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guac_rdp_disp_fit(&width, &height);
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/* Width may be no more than 8192 pixels */
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else if (width > 8192)
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width = 8192;
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/* Fit height within bounds, adjusting width to maintain aspect ratio */
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guac_rdp_disp_fit(&height, &width);
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/* Width must be even */
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else if (width % 2 == 1)
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if (width % 2 == 1)
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width -= 1;
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/* Height must be at least 200 pixels */
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if (height < 200)
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height = 200;
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/* Height may be no more than 8192 pixels */
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else if (height > 8192)
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height = 8192;
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/* Store deferred size */
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disp->requested_width = width;
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disp->requested_height = height;
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@ -26,6 +26,15 @@
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#include <freerdp/client/disp.h>
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#include <freerdp/freerdp.h>
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/**
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* The minimum value for width or height, in pixels.
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*/
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#define GUAC_RDP_DISP_MIN_SIZE 200
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/**
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* The maximum value for width or height, in pixels.
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*/
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#define GUAC_RDP_DISP_MAX_SIZE 8192
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/**
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* The minimum amount of time that must elapse between display size updates,
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